12390-2:2019: Bs En
: After compaction, the top surface is leveled using a float or trowel to ensure a flat, smooth surface for testing. 3. Standard Curing Requirements
For standard 100mm or 150mm cubes, the concrete is typically placed in two or three equal layers.
Every sample is treated equally, reducing variability.
| | Minimum Tamps per Layer | |----------------|------------------------------| | 100 mm cube | 25 tamps | | 150 mm cube | 35 tamps | bs en 12390-2:2019
| | Title | Application | |----------|-----------|-----------------| | Part 1 | Shape, dimensions and other requirements of specimens and moulds | Defines the dimensional tolerances and specifications for test specimens and the moulds used to cast them | | Part 2 | Making and curing specimens for strength tests | This document – covers specimen preparation and curing procedures | | Part 3 | Compressive strength of test specimens | Determines the compressive strength of test specimens | | Part 4 | Compressive strength – Specification for testing machines | Specifies requirements for the equipment used in compressive strength testing | | Part 5 | Flexural strength of test specimens | Establishes procedures for evaluating the flexural (bending) strength of concrete | | Part 6 | Tensile splitting strength of test specimens | Covers the method for determining the splitting tensile strength of cylindrical specimens | | Part 7 | Density of hardened concrete | Specifies procedures for determining the density of test specimens | | Part 8 | Depth of penetration of water under pressure | Establishes a method for assessing the water permeability of hardened concrete | | Part 9 | Freeze-thaw resistance | Covers the assessment of concrete's durability under freeze-thaw cycling | | Part 10 | Determination of the carbonation resistance of concrete | Establishes methods for assessing the carbonation depth and resistance of hardened concrete | | Part 11 | Determination of the chloride resistance of concrete | Specifies procedures for assessing the resistance of hardened concrete to chloride ingress | | Part 12 | Determination of the carbonation resistance of concrete at atmospheric CO₂ levels | Establishes a method for assessing the carbonation resistance of concrete under natural atmospheric conditions |
BS EN 12390-2:2019 is part of an interconnected ecosystem of concrete standards. The most notable relationships include:
A non-reactive mineral oil or chemical release agent must be applied thinly to the inside of the moulds to prevent concrete from sticking without chemically altering the surface layer. : After compaction, the top surface is leveled
Leave the specimens in their moulds for at least 16 hours, but no longer than 3 days. The standard norm is 24 hours.
What do you primarily cast? (Cubes, cylinders, or prisms?)
This article provides a comprehensive breakdown of BS EN 12390-2:2019, covering its scope, essential equipment, step-by-step procedures, and the critical importance of proper curing. 1. Scope and Significance of the Standard Every sample is treated equally, reducing variability
Curing is arguably the most critical phase after casting. The concrete must be kept moist and at a controlled temperature to allow the proper hydration reactions to occur, which develop its strength. The standard specifies that specimens should be kept in a curing environment at a temperature of , typically in a water curing tank or a fog room. They should be covered initially to prevent surface evaporation and stored away from direct heat or cold. Proper curing is non-negotiable; it directly influences the reliability of the strength test.
Curing is arguably the most sensitive phase of specimen preparation. Cement hydration is a chemical process that requires continuous moisture and controlled temperatures.
Must be clean and coated with a non-reactive release agent to prevent sticking.
BS EN 12390-2:2019 includes specific requirements for marking test specimens. Each specimen must be clearly and permanently marked for traceability – typically with the . This might include information such as casting location, batch number, and the intended test age (e.g., 7 days, 28 days).
Q: What are the benefits of using BS EN 12390-2:2019? A: The benefits of using BS EN 12390-2:2019 include improved accuracy, increased confidence in the quality and durability of concrete, and compliance with European and UK regulations.