Bs En 12390-2:2019 May 2026

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: 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. bs en 12390-2:2019

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:

1. Verify design assumptions: By testing the compressive strength of hardened concrete, engineers can verify that the concrete meets the design assumptions and calculations.
2. Ensure structural safety: Compressive strength testing helps to ensure that the concrete can withstand the loads and stresses imposed on the structure.
3. Monitor quality control: Regular testing of hardened concrete helps to monitor the quality of concrete production and identify potential issues early on.

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:

1. Sample preparation: Concrete samples are prepared by casting them into standard molds. The samples are then cured under controlled conditions to simulate site conditions.
2. Sample storage: The samples are stored in a controlled environment, such as a laboratory, to ensure that they are not exposed to extreme temperatures or moisture.
3. Sample preparation for testing: The samples are removed from their molds and prepared for testing by grinding or capping the ends to ensure a smooth, even surface.
4. Compressive strength testing: The prepared samples are then subjected to compressive loading using a testing machine. The load is applied gradually until the sample fails.
5. Calculation of compressive strength: The compressive strength is calculated by dividing the maximum load applied by the cross-sectional area of the sample.

Test Specimen Requirements

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

1. Shape and size: Test specimens are typically cylindrical, with a diameter of 100mm or 150mm and a height of 200mm or 300mm, respectively.
2. Age: Test specimens must be tested at a specified age, usually 28 days, but can be tested at other ages if required.
3. Conditioning: Test specimens must be conditioned to a stable temperature and humidity level before testing.

Factors Affecting Compressive Strength

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

1. Cement content: The type and content of cement used can significantly impact compressive strength.
2. Aggregate properties: The type, size, and grading of aggregate can influence compressive strength.
3. Water-cement ratio: The water-cement ratio can affect the compressive strength of concrete.
4. Curing conditions: The curing conditions, including temperature, humidity, and duration, can impact compressive strength.

Benefits of BS EN 12390-2:2019 Compliance

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

1. Improved quality control: By following a standardized testing procedure, construction companies can ensure that their concrete products meet the required quality standards.
2. Increased confidence: Testing to BS EN 12390-2:2019 provides a high level of confidence in the compressive strength of hardened concrete.
3. Compliance with regulatory requirements: Many regulatory authorities require compliance with BS EN 12390-2:2019 for construction projects.

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 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 The standard BS EN 12390-2:2019 is a critical

The standard BS EN 12390-2:2019 focuses on the preparation and curing of hardened concrete specimens for strength testing.

It does not specify or require a "solid paper" product as part of its technical procedures for making or curing test cubes or cylinders BSI Knowledge

If you are looking for physical materials often used alongside this standard, you may be referring to: Common Ancillary Materials Mould Release Agent:

A thin coating applied to the inner surface of moulds to prevent concrete from sticking. Identification Marking:

Labels or marking tools used to identify specimens immediately after leveling the surface. Moisture Protection:

Plastic sheeting or damp burlap/hessian is typically used to cover specimens immediately after casting to prevent moisture loss during initial curing. Standard Overview

Procedures for making and curing specimens (cubes, cylinders, and prisms) for strength tests. Key Steps:

Includes filling and compacting moulds, surface leveling, marking, curing conditions, and transportation. Curing Requirements: Specimens must remain in moulds for 16 hours to 3 days at

, followed by underwater curing or humidity-controlled storage until testing. BSI Knowledge

If "solid paper" refers to a specific academic paper or technical document investigating this standard, several studies use it as a reference for their methodology, such as those exploring bauxite tailing admixtures pozzolanic performance in structural concrete Quick questions if you have time: Was this "solid paper" a product? Need help finding the standard? BS EN 12390-2:2019 - TC | 31 Jul 2019 | BSI Knowledge 31 July 2019 —

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Main requirements and procedures

• Sampling and specimen numbers: follow EN 12350‑1 and project/contract requirements for frequency and number of specimens.
• Mould preparation: use moulds compliant with EN 12390‑1; clean, oiled or otherwise prepared to allow removal without damage.
• Filling and compaction:
  • Describe permitted compaction methods: hand tamping, vibrating table, internal (poker) vibrator.
  • Note: internal vibrators acceptable but should be used with caution for air‑entrained concretes to avoid loss of entrained air.
  • Fill moulds in layers of specified thickness with uniform compaction for each layer.
• Surface finishing: level and finish specimen surface according to specified method (e.g., strike-off) to avoid entrapment or segregation.
• Marking: specimens must be marked to identify batch, date, position in mould and orientation where required.
• Curing:
  • Initial curing in mould for a specified minimum period (commonly 24 ± 2 hours unless otherwise agreed).
  • After demoulding, curing in water at 20 ± 2 °C is the reference method; curing in a closely regulated humidity chamber is recognized as equivalent.
  • Alternative curing regimes allowed only if specified and recorded.
• Transportation and handling: prescribe care to avoid damage, restraint of specimens during movement, and maximum permitted times/conditions between casting and testing when relevant.
• Reporting: specimen details (mould type/dimensions, compaction method, curing regime, dates/times, batch ID) must be recorded and reported with test results.

1. Executive Summary

BS EN 12390-2:2019 is a crucial standard within the construction materials industry. It specifies the methods for making and curing concrete test specimens (cubes and cylinders) in a laboratory setting. The primary objective is to ensure that the specimens produced are representative of the concrete quality, allowing for accurate determination of compressive strength. It replaced the 2009 version and introduces stricter controls on curing conditions, temperature monitoring, and surface preparation of specimens.

C. Demoulding

Great care must be taken when removing the moulds. If the concrete is damaged during this process, the specimen is compromised. Once demoulded, the specimens should be marked clearly and permanently.

A. Standard Curing (Water Curing) – for Conformity Testing

• Environment: Fully immersed in lime-saturated water (or water stored in a sealed, damp cabinet at ≥95% RH).
• Temperature: 20°C ± 1°C (for concrete with specified strength ≥80 MPa) or 20°C ± 2°C (for lower grades). The 2019 version introduces stricter control for high-strength concrete because it is more sensitive to temperature variations.
• Water quality: The water must be changed periodically to maintain saturation with calcium hydroxide. Use of tap water alone (without lime) can leach out cement paste, weakening the surface of the specimen and leading to false low results.

Step 5: Initial Curing (Before Demoulding)

• Cover the specimen immediately with a non-absorbent, airtight cover (e.g., plastic sheet or damp hessian if covered by plastic) to prevent moisture loss.
• Store the moulded specimen in an environment at 20°C ± 5°C for the first 24 hours (for standard curing). Avoid drafts, direct sunlight, or vibration.

Step 1: Sampling Fresh Concrete

The concrete must be sampled according to BS EN 12350-1 (Testing fresh concrete – Part 1: Sampling). Sampling should occur mid-discharge from the truck, not at the very start or end. Verify design assumptions : By testing the compressive