Bs En 12390-2:2019 -

The standard details a clear, sequential process. The goal is to produce a homogeneous specimen with no segregation, air pockets, or surface defects.

BS EN 12390-2:2019 is more than a procedural document – it is the legal and technical foundation for trust in concrete testing. Whether you are a technician, engineer, laboratory manager, or quality auditor, strict adherence to this standard eliminates variables that could otherwise obscure the true quality of the concrete.

Introduction

Concrete is the most widely used construction material globally, and its compressive strength is the primary property governing structural design and safety assessment. However, the strength of a concrete sample is not an intrinsic, fixed value; it is profoundly influenced by how the test specimen is prepared, handled, and stored prior to testing. Recognizing this, the European Committee for Standardization (CEN) has developed a suite of standards under EN 12390. Among these, BS EN 12390-2:2019 – “Testing hardened concrete – Part 2: Making and curing specimens for strength tests” is a critical document. This standard provides the definitive methodology for producing consistent, representative, and reliable concrete test specimens, directly impacting quality control, compliance verification, and structural safety across the construction industry.

Scope and Purpose

BS EN 12390-2:2019 supersedes the 2009 edition and specifies procedures for making and curing test specimens from fresh concrete. Its primary purpose is to minimize variability introduced during specimen preparation, ensuring that the measured strength reflects the actual quality of the concrete in the structure, rather than artifacts of sample handling. The standard applies to specimens intended for compressive, flexural, or splitting tensile strength tests, covering both laboratory-cured specimens (for quality control and acceptance testing) and field-cured specimens (for assessing when formwork can be removed or when a structure can be loaded).

Key Requirements and Methodological Rigor

The standard is methodical in its approach, addressing every stage from molding to the moment before testing.

Changes Introduced in the 2019 Edition

Compared to the 2009 version, BS EN 12390-2:2019 includes several technical refinements:

Practical Importance and Industry Impact

The consequences of ignoring BS EN 12390-2:2019 can be severe. If specimens are not properly compacted, low strength results may lead to unnecessary rejection of acceptable concrete. Conversely, if specimens are cured under ideal water conditions while the structure dries in the sun, the results will be dangerously optimistic, potentially leading to premature removal of formwork or early loading, resulting in cracking or collapse.

For quality control laboratories, accredited testing firms, and construction contractors, adherence to this standard is often a condition of certification under ISO/IEC 17025. It enables repeatable, comparable, and legally defensible test data. Disputes over concrete strength are frequently traced back to non-compliance with specimen preparation and curing protocols, making this standard a cornerstone of forensic structural analysis.

Conclusion

BS EN 12390-2:2019 is more than a procedural checklist; it is a scientific framework that transforms a heterogeneous, wet material into reliable, testable specimens whose results can be trusted. By rigorously defining moulds, compaction, finishing, and—most critically—curing regimes, the standard ensures that the measured strength of a concrete cylinder or cube faithfully represents the structural material’s potential. For engineers, technicians, and quality managers, mastering and adhering to this standard is not merely a bureaucratic requirement but a fundamental duty to ensure safety, durability, and economic efficiency in concrete construction. As concrete technology evolves with new admixtures and sustainability targets, standards like BS EN 12390-2:2019 provide the essential stability and reproducibility needed to benchmark progress and guarantee performance.

The standard BS EN 12390-2:2019 is a critical technical document that specifies methods for making and curing specimens for strength tests of hardened concrete.

The following story personifies this technical process through the eyes of a meticulous Site Engineer. The Guardian of the Cube

For Elias, the construction site was a chaotic symphony of diesel engines and shouting, but the "Cube Shed" was his sanctuary of silence. On his desk sat a worn copy of BS EN 12390-2:2019, the rulebook that separated a stable skyscraper from a disaster in the making.

"Mixing is done, Elias!" the foreman yelled, pointing at the fresh grey sludge pouring from the truck.

Elias didn't move until he checked his stopwatch. He knew the 90-minute rule—if that concrete wasn't in the moulds soon, it was useless. He stepped into the light, carrying his steel moulds. These weren't just boxes; they were the "specimens" defined by the standard. Step 1: The Filling

Elias began the ritual of making the specimens. He didn't just dump the concrete in; according to the standard, it had to be done in layers. Using a tamping rod, he struck the mix exactly 25 times per layer, ensuring no "honeycombing" or air pockets remained. If he rushed this, the final strength test would be a lie. Step 2: The Initial Rest

Once the surfaces were leveled and smoothed, Elias moved the moulds to a shaded, vibration-free corner. The BS EN 12390-2:2019 was strict: the cubes needed to stay in their moulds for at least 16 hours, but no more than three days, protected from the elements. He covered them with a damp cloth and plastic sheeting, tucked away like sleeping giants. Step 3: The Curing

The next morning, Elias performed the "demoulding." He carefully loosened the bolts, revealing perfect 150mm grey cubes. But their journey wasn't over. For concrete to reach its true potential, it needs to "cure."

He lowered them into a temperature-controlled water tank. "See you in 28 days," he whispered. In this underwater purgatory, the chemical reaction—hydration—would continue until the concrete was rock hard. The Reckoning

Exactly 28 days later, the cubes were pulled out, wiped dry, and placed under a massive hydraulic press for the compression test. As the machine groaned, applying thousands of kilonewtons of force, Elias looked at his 2019 standard manual. CRACK.

The cube shattered into a perfect hour-glass shape—the sign of a well-made specimen. The digital display flashed a number that exceeded the design strength. Elias exhaled. Because he had followed BS EN 12390-2 to the letter, he knew the building rising above him was safe.

He closed his manual, ready to start the ritual all over again with the next delivery.

BS EN 12390-2:2019 does not work in isolation. It is part of a family:

| Standard | Title | Role | |----------|-------|------| | BS EN 12390-1 | Shape, dimensions, and tolerances of moulds | Specifies the moulds used in Part 2. | | BS EN 12390-3 | Compressive strength of test specimens | The test method after curing per Part 2. | | BS EN 12390-4 | Determination of compressive strength – non-destructive (rebound hammer) | Optional supplementary. | | BS EN 12350-4 | Fresh concrete – Degree of compactability | Helps determine compaction method for Part 2. | | BS 1881-108 | (Partly superseded) | Old UK standard – still referenced but not current. |

For anyone working in concrete testing, keeping the entire BS EN 12390 series on hand is essential.

Adherence to BS EN 12390-2:2019 is not merely bureaucratic box-ticking; it is a safeguard for structural integrity.

BS EN 12390-2:2019 Testing Hardened Concrete: Making and Curing Specimens for Strength Tests

The BS EN 12390-2:2019 standard is a critical document for civil engineers, laboratory technicians, and construction professionals involved in concrete quality control. This European Standard specifies the methods for making and curing test specimens for strength tests on hardened concrete. Compliance with this standard ensures that concrete strength results are accurate, repeatable, and representative of the material's true potential. Understanding the Significance of the Standard

Concrete is a heterogeneous material, and its measured strength is highly sensitive to how it is handled in its plastic state and how it is treated during the early stages of hardening. BS EN 12390-2:2019 provides a rigorous framework to minimize variables during the sampling and preparation process. By standardizing the size of the molds, the compaction methods, and the temperature and humidity of the curing environment, the industry can compare results across different projects and regions with confidence. Scope and Application

This part of the EN 12390 series applies to specimens made from concrete with a maximum aggregate size of 40 mm or less. It covers the preparation of cubes, cylinders, and prisms. The standard is used both for specimens made in a laboratory setting and those made on-site to verify the quality of concrete being delivered to a structure. Essential Equipment Requirements

To adhere to the standard, specific equipment must be used. Molds must be made of a non-absorbent, rigid material that does not react with cement paste. They must be watertight and capable of maintaining their shape under the pressure of compaction. Common materials include steel, cast iron, and certain high-density plastics.

The standard also specifies the tools for compaction. Depending on the consistency of the concrete, this may include internal vibrators (poker vibrators), vibrating tables, or manual tamping rods. For manual compaction, the rod must be circular in cross-section, straight, and made of steel with a smooth finish. The Making of Test Specimens

The process begins with obtaining a representative sample of fresh concrete according to EN 12309-1. Once the sample is ready, the molds are prepared by applying a thin film of non-reactive release agent to the internal surfaces.

The concrete is placed in the molds in layers. The number of layers and the duration of vibration or number of tamps depend on the dimensions of the specimen and the workability of the mix. Over-vibration must be avoided as it can cause segregation, while under-compaction leads to voids that artificially lower the recorded strength. After compaction, the top surface is leveled using a trowel or float to create a smooth, flat finish. The Curing Process: A Critical Phase

Curing is perhaps the most vital step in the preparation of concrete specimens. BS EN 12390-2:2019 outlines strict parameters for both initial and long-term curing. Initial Curing

Specimens must remain in the molds for at least 16 hours but no longer than 3 days. During this time, they must be protected from shock, vibration, and dehydration. The temperature during this initial phase must be maintained between 20°C and 25°C in temperate climates, or higher in hot climates if specified. Covering the molds with plastic sheeting or wet burlap is a common practice to prevent moisture loss. Standard Curing

After removal from the molds (demolding), the specimens must be cured in water or in a mist room. If water curing is used, the specimens must be fully submerged in a tank. The water temperature must be maintained at a constant 20°C (± 2°C). If a mist room is used, the relative humidity must be kept above 95%. This controlled environment ensures that the hydration of the cement continues optimally, allowing the concrete to gain strength at a predictable rate. Marking and Documentation bs en 12390-2:2019

Every specimen must be clearly and indelibly marked so that it can be traced back to its specific batch, location in the structure, and date of manufacture. Accurate record-keeping is a requirement of the standard, including details of the sampling procedure, the compaction method used, and the duration and conditions of the curing period. Differences Between Laboratory and Site Curing

While the standard primary focus is on "standard curing" to verify the potential strength of a mix design, it also acknowledges "site curing." Site-cured specimens are treated as closely as possible to the actual structure they represent. These are often used to determine when formwork can be safely removed or when post-tensioning can occur. However, site-cured results cannot be used for official compliance with the 28-day characteristic strength requirements unless specifically permitted. Conclusion

The BS EN 12390-2:2019 standard is a cornerstone of modern concrete technology. By following its detailed procedures for making and curing specimens, the construction industry ensures that the data used to make safety and structural decisions is robust and reliable. Whether you are a technician in a commercial lab or a site manager overseeing a major pour, a deep understanding of this standard is essential for maintaining the integrity of the built environment.

BS EN 12390-2:2019 defines the standardized methods for making and curing concrete test specimens, such as cubes, cylinders, and prisms, to ensure accurate compressive and flexural strength results. The standard outlines specific procedures for molding, compaction, and environmental curing controls required for quality assurance and regulatory compliance. For more details, visit BSI Knowledge. BS EN 12390-2:2019 - TC | 31 Jul 2019 | BSI Knowledge

BS EN 12390-2:2019 defines strict, standardized procedures for making and curing hardened concrete specimens to ensure accurate, consistent strength test results. It mandates specific guidelines for mould preparation, compaction methods, and environmental controls for specimens during initial and final curing stages. For more details, visit BSI Knowledge

Technical Overview: BS EN 12390-2:2019 BS EN 12390-2:2019 is a European standard adopted by the British Standards Institution (BSI) that specifies the methods for making and curing specimens for strength tests

of hardened concrete. It is a critical component of the EN 12390 series, which governs the testing of hardened concrete to ensure structural integrity and compliance with design specifications. 1. Scope and Application

The standard provides a rigorous framework for preparing concrete test specimens, such as cubes, cylinders, and prisms, from fresh concrete. These specimens are later used to determine mechanical properties like compressive and flexural strength. Primary Focus

: Standardizing the laboratory and site conditions for specimen preparation to minimize variability in test results. Relationship to Other Standards : It is often used in conjunction with BS EN 12350-1 (sampling fresh concrete) and BS EN 12390-3 (compressive strength testing). 2. Key Procedures for Making Specimens

The preparation process is strictly defined to ensure homogeneity and representativeness of the concrete mix. Mould Preparation

: Specimens are typically cast in steel or rigid moulds that meet specific dimensional tolerances. Filling and Compaction

: Concrete is placed into moulds in layers and compacted using methods such as a vibrating table

, internal vibrator, or tamping rod to remove entrapped air. Surface Finishing

: After compaction, the top surface is leveled using a float or trowel to ensure a flat, smooth surface for testing. 3. Standard Curing Requirements

Curing is arguably the most critical phase, as it directly impacts the hydration process and ultimate strength development. BS EN 12390.2 - 2000 (Testing Hardened Concrete - Scribd

Uploaded by. ... Scope: Defines the scope of the standard, covering test specimen molding and curing for strength tests. Foreword:

BS EN 12390-2:2019: A Comprehensive Guide to Testing Hardened Concrete

The construction industry relies heavily on the quality and durability of concrete to ensure the structural integrity of buildings, bridges, and other infrastructure projects. One crucial aspect of concrete quality control is testing hardened concrete to determine its mechanical properties. This is where BS EN 12390-2:2019 comes into play. In this article, we will provide an in-depth look at the BS EN 12390-2:2019 standard, its significance, and the testing procedures for hardened concrete.

What is BS EN 12390-2:2019?

BS EN 12390-2:2019 is a British Standard (BS) and European Norm (EN) that outlines the testing methods for hardened concrete. Specifically, it covers the determination of the compressive strength of hardened concrete. The standard is published by the British Standards Institution (BSI) and is widely adopted across Europe and beyond.

Importance of Testing Hardened Concrete

Testing hardened concrete is essential to ensure that it meets the required strength and durability specifications. Compressive strength is a critical parameter in concrete quality control, as it directly affects the structural performance of concrete structures. The compressive strength test helps to:

BS EN 12390-2:2019 Testing Procedure

The BS EN 12390-2:2019 standard specifies the testing procedure for determining the compressive strength of hardened concrete. The test involves the following steps:

Test Specimen Requirements

According to BS EN 12390-2:2019, test specimens must meet specific requirements, including:

Factors Affecting Compressive Strength

Several factors can affect the compressive strength of hardened concrete, including:

Benefits of BS EN 12390-2:2019 Compliance

Compliance with BS EN 12390-2:2019 offers several benefits, including:

Conclusion

BS EN 12390-2:2019 is a critical standard for testing hardened concrete in the construction industry. By following the testing procedures outlined in this standard, construction companies can ensure that their concrete products meet the required compressive strength specifications. Compliance with BS EN 12390-2:2019 provides numerous benefits, including improved quality control, increased confidence, and compliance with regulatory requirements. As a result, it is essential for construction professionals to understand and implement the testing procedures outlined in BS EN 12390-2:2019 to ensure the structural integrity and durability of concrete structures.

BS EN 12390-2:2019 is the definitive British and European standard for making and curing concrete test specimens. Published by the British Standards Institution (BSI), it ensures that cubes, cylinders, and prisms are prepared consistently so that strength tests—such as compressive and flexural strength—accurately reflect the concrete's quality. 🏗️ Core Purpose of the Standard

The main goal of BS EN 12390-2:2019 is to eliminate variables in the preparation process. If specimens are made or cured incorrectly, the resulting strength data may be falsely low, leading to unnecessary project delays or costly structural disputes. Key functions include:

Standardizing Preparation: Defining exactly how to fill and compact molds.

Controlling Curing: Specifying temperature and moisture conditions for hydration.

Ensuring Accuracy: Providing a reliable framework for Quality Control (QC) and compliance with structural designs. 🛠️ Key Procedures and Requirements 1. Apparatus and Molds

Specimens must be cast in molds that comply with BS EN 12390-1. Molds should be: Non-reactive: Materials must not affect the concrete.

Watertight: To prevent loss of cement paste or water during casting.

Lubricated: Treated with a non-reactive release agent for easy demolding. 2. Filling and Compaction

The concrete must be filled in layers to ensure full density without segregation. Acceptable compaction methods include:

Mechanical Vibration: Using a vibrating table or internal "poker" vibrator. Hand Compaction: Using a standard tamping rod or bar. The standard details a clear, sequential process

Surface Leveling: The top surface must be finished flat to ensure even loading during testing. 3. Initial Curing and Demolding Timeframe: Specimens typically remain in the mold for Environment: They must be kept at a temperature of 15∘C15 raised to the composed with power C 22∘C22 raised to the composed with power C 20∘C20 raised to the composed with power C

) and protected from moisture loss by covering them with plastic or wet burlap.

Demolding: Careful removal is required to avoid edge damage, which can weaken the specimen during a compression test. 4. Final Curing Conditions

Once demolded, specimens must be cured until the time of testing. Standard methods include:

BS EN 12390-2:2019 is the British and European standard that dictates the procedures for making and curing concrete specimens for strength testing. It is a critical document for ensuring that concrete samples (typically cubes or cylinders) are prepared consistently so that strength results are accurate and comparable. What This Standard Covers

The document outlines specific laboratory and field procedures to maintain the integrity of concrete samples from the moment they are cast until they are tested for hardened strength:

Preparation & Filling: Instructions for preparing moulds and the systematic filling process to avoid segregation.

Compaction: Standardized methods for compacting the concrete within the moulds using mechanical or manual tools to remove air pockets.

Surface Leveling & Marking: Procedures for finishing the top surface and clearly identifying each specimen for tracking.

Curing: Strict requirements for temperature and humidity—often involving water tanks or humidity chambers—to allow the concrete to gain strength properly before testing.

Transport: Guidelines for safely moving specimens from the site to the laboratory without causing internal damage. Why It’s Important

Standardization: It ensures that a 28-day strength test in one lab is directly comparable to a test in another.

Reliability: Improper curing (e.g., letting a specimen dry out too quickly) can lead to artificially low strength readings, potentially causing a project to fail inspection unnecessarily.

Safety: Adhering to these methods ensures that the concrete used in buildings and infrastructure truly meets the design's structural requirements. Key Resources BS EN 12390-2:2019 Concrete Testing | PDF - Scribd

BS EN 12390-2:2019 is the British and European standard that defines the methods for making and curing test specimens (such as cubes, cylinders, and prisms) used specifically for strength testing of hardened concrete. This standard is a critical component of quality assurance in construction, replacing the previous 2009 version to incorporate updated procedures for compaction, transport, and initial storage. 1. Scope and Fundamentals

The primary objective of BS EN 12390-2:2019 is to standardize the preparation of concrete samples so that strength results are reliable and comparable across different laboratories and projects. It covers: Preparation and filling of molds. Compaction techniques (mechanical and manual). Surface leveling and marking. Curing protocols to ensure optimal hydration. Transportation requirements for specimens. 2. Standardized Apparatus and Materials

To ensure consistency, the standard specifies the use of equipment conforming to BS EN 12390-1. Key tools include:

Molds: Must be clean and coated with a non-reactive release agent to prevent sticking.

Compacting Tools: These can include internal (poker) vibrators, vibrating tables, or manual compacting rods/bars. Trowels/Floats: Used for mandatory surface leveling. 3. Procedural Methodology Specimen Preparation and Filling

Concrete samples must be obtained following EN 12350-1 and thoroughly remixed before use. Molds are typically filled in multiple layers depending on the concrete's consistency; however, self-compacting concrete is filled in a single layer without additional vibration. Compaction

Each layer must be fully compacted immediately after placement:

Mechanical Vibration: Using a vibrating table or poker vibrator until air bubbles cease to emerge.

Hand Compaction: Using a rod or bar, typically tamping at least 25 times uniformly per layer for a 100mm cube.

Mallet Tapping: After each layer, the outside of the mold is tapped with a mallet to close voids and release trapped air. Surface Finishing and Identification

After the final layer is compacted, excess concrete is removed and the surface is leveled flush with the mold rim. Specimens must be clearly marked for traceability without damaging the fresh surface. 4. Curing and Storage Requirements

Curing is the most critical phase for strength development, providing necessary moisture and temperature for cement hydration. BS EN 12390-2:2019 Concrete Testing | PDF - Scribd

BS EN 12390-2:2019 provides the definitive framework for the preparation of concrete test specimens. Its strict requirements for temperature control and curing duration ensure that the construction industry has reliable data on concrete performance. Non-compliance with this standard typically results in invalid strength tests, posing significant risks to construction projects.

Report: BS EN 12390-2:2019 - Testing Hardened Concrete: Part 2 - Making and Curing Specimens

Introduction

BS EN 12390-2:2019 is a European Standard that outlines the procedures for making and curing specimens of hardened concrete. This standard is part of a series of standards for testing hardened concrete, and it provides guidelines for the preparation of concrete specimens for testing. This report provides an overview of the standard, its significance, and key aspects of making and curing specimens.

Scope and Significance

The standard BS EN 12390-2:2019 covers the procedures for making and curing specimens of hardened concrete for testing. The standard is applicable to concrete made with normal weight aggregates, lightweight aggregates, and heavyweight aggregates. The standard provides guidelines for:

The significance of this standard lies in its ability to ensure that concrete specimens are made and cured in a consistent and controlled manner, which is essential for obtaining reliable and accurate test results.

Key Aspects of Making and Curing Specimens

The standard BS EN 12390-2:2019 covers several key aspects of making and curing specimens, including:

Requirements for Making Specimens

The standard outlines specific requirements for making specimens, including:

Requirements for Curing Specimens

The standard outlines specific requirements for curing specimens, including:

Conclusion

In conclusion, BS EN 12390-2:2019 provides guidelines for making and curing specimens of hardened concrete for testing. The standard ensures that specimens are made and cured in a consistent and controlled manner, which is essential for obtaining reliable and accurate test results. By following this standard, manufacturers and testing laboratories can ensure that their concrete specimens are prepared in accordance with European standards, which is essential for ensuring the quality and safety of concrete structures.

Recommendations

Based on the requirements of BS EN 12390-2:2019, it is recommended that:

Limitations

This report provides a general overview of BS EN 12390-2:2019 and should not be considered a substitute for the actual standard. It is essential to consult the standard and relevant regulatory requirements for specific guidance on making and curing concrete specimens.

BS EN 12390-2:2019!

That's a British Standard (BS) and European Norm (EN) that outlines the testing methods for hardened concrete. Specifically, Part 2 of the standard focuses on the "Determination of compressive strength of test specimens".

Here's a brief overview:

Title: BS EN 12390-2:2019 - Testing hardened concrete - Part 2: Determination of compressive strength of test specimens

Summary: This standard specifies the method for determining the compressive strength of hardened concrete test specimens, including cubes, cylinders, and other shapes. The test is used to evaluate the strength of concrete in structures, and it's an essential aspect of quality control and assurance in construction.

Key aspects:

Why is it interesting?

Well, concrete is one of the most widely used construction materials in the world, and its compressive strength is a critical parameter in ensuring the safety and durability of structures. The BS EN 12390-2:2019 standard provides a widely accepted and reliable method for determining the compressive strength of concrete, which helps engineers, contractors, and researchers to:

The standard is an essential tool for anyone involved in the construction industry, from engineers and architects to contractors and materials scientists.

What specific aspects of BS EN 12390-2:2019 would you like to discuss or explore further?

BS EN 12390-2:2019 is the British Standard that specifies methods for making and curing test specimens for concrete strength tests. It provides a standardized framework to ensure that concrete cubes, cylinders, and prisms are prepared consistently, which is critical for accurate compressive strength assessments. 🏗️ Key Procedural Steps

The standard outlines the lifecycle of a test specimen from the moment it is cast until it is ready for testing:

Mould Preparation: Moulds must conform to BS EN 12390-1 and be coated with a non-reactive release agent to prevent sticking.

Filling and Compaction: Concrete is filled in layers and compacted using methods like: Mechanical: Internal poker vibrators or vibrating tables.

Manual: Compacting rods or bars (typically at least 25 tamps per layer).

Surface Leveling: After compaction, the top surface is leveled using a steel trowel or float to ensure a smooth, flat finish.

Initial Curing: Specimens remain in their moulds for 16 hours to 3 days at a temperature of in hot climates), protected from shock and dehydration.

Final Curing: After demoulding, specimens are typically stored in water at or in a humidity chamber with relative humidity until the test date. 📋 Reporting Requirements A formal test report must be generated, including: Unique identification of the test sample. The exact date and time the specimens were made. The specific method of compaction used. Details of the curing conditions and duration. Any deviations from the standard procedures. 🛡️ Why This Standard Matters

Consistency: Standardizing preparation ensures that variations in test results are due to the concrete mix itself, not how the specimen was handled.

Safety: Accurate strength data is fundamental to verifying the structural integrity of buildings and infrastructure.

Regulatory Compliance: Adhering to this standard—which supersedes the 2009 version—is often a contractual or legal requirement for European construction projects. SLOVENSKI STANDARD SIST EN 12390-2:2019

BS EN 12390-2:2019 defines critical standards for molding, compacting, and curing concrete test specimens to ensure structural integrity and reliable strength evaluations. By establishing uniform procedures for specimen preparation, it enables accurate quality assurance and enhanced durability for concrete structures. For more details, visit en-standard.eu. BS EN 12390-2:2019 Concrete Testing | PDF - Scribd

BS EN 12390-2:2019 dictates the standardized procedures for making and curing concrete test specimens to ensure accurate strength verification. The process involves precise preparation of moulds, compaction, and controlled curing at 20°C (± 2°C) to simulate real-world concrete performance. Learn more about these standards through BS EN 12390.2 - 2000 (Testing Hardened Concrete - Scribd

BS EN 12390-2:2019 the British and European standard that defines the procedures for making and curing concrete specimens for strength tests

. By standardizing how test cubes, cylinders, and prisms are handled, it ensures that the physical properties of the hardened concrete are measured accurately and consistently across different construction projects. Scope and Purpose

The standard provides a rigorous framework for preparing specimens used primarily for compressive and flexural strength testing. It covers the entire lifecycle of a test specimen, including: Preparation : Using non-reactive release agents to prevent sticking. : Layering concrete based on consistency. Compaction

: Prescribing specific mechanical (vibrating tables, internal vibrators) or hand methods (compacting rods).

: Establishing precise temperature and moisture requirements. Key Technical Procedures

Adhering to these steps is critical, as minor deviations can lead to significant variations in reported strength. Compaction

: The standard allows for multiple methods but warns against over-vibration, which can cause the loss of entrained air and lead to segregation. For hand compaction, it typically suggests 25 strokes per layer to remove entrapped air without disturbing entrained air. Initial Curing

: Specimens must remain in their molds for at least 16 hours but no more than three days at a temperature of

C. They must be protected from shock, vibration, and moisture loss (e.g., covered with polyethylene sheeting). Final Curing

: Once demolded, specimens are typically cured in a water tank at

C or in a humidity-controlled chamber with relative humidity

: When moving specimens to a laboratory, they must be protected from dehydration and temperature extremes using wet sand, sawdust, or sealed plastic bags. Significance in Construction The 2019 version supersedes the earlier 2009 edition and aligns with the broader EN 12390 series

for hardened concrete testing. Its implementation is vital for: Quality Control

: Verifying that the concrete delivered to a site meets the specified design strength.

: Ensuring structural integrity by identifying substandard batches before they become critical failures. Traceability

: Requiring detailed reporting of sampling, compaction, and curing conditions to maintain accountability. Transport and Handling: The 2019 edition adds clarity

For professionals like civil engineers and laboratory technicians, following the BS EN 12390-2:2019

standard is not just a regulatory requirement but a fundamental practice for building durable and safe infrastructure. comparative breakdown of the specific changes between the 2009 and 2019 versions?