DIN EN 12390-14 2018-10 PDF

Full title and description

STB DIN EN 12390-14:2018-10 — Testing hardened concrete — Part 14: Semi-adiabatic method for the determination of heat released by concrete during its hardening process (German version of EN 12390-14:2018). This standard specifies a laboratory semi-adiabatic calorimetric procedure (with an informative annex for on-site testing) to measure the heat evolved by concrete during hydration and early hardening.

Abstract

EN 12390-14:2018 describes a semi-adiabatic test method to quantify the heat released by concrete during its hardening process. The procedure uses a semi‑adiabatic calorimeter assembly to record temperature development of a concrete specimen and a matched control, applies calibration to account for heat losses and calorimeter heat capacity, and reduces recorded temperature data to cumulative heat released (reported typically in J/kg) as a function of time. The laboratory method is suitable for concretes with maximum aggregate size up to 32 mm; Annex B gives a procedure for field testing.

General information

• Status: Current (adopted European standard; German version published by DIN).
• Publication date: October 2018 (2018-10).
• Publisher: Deutsches Institut für Normung (DIN) — German version of CEN / EN 12390-14:2018.
• ICS / categories: 91.100.30 (Concrete and concrete products).
• Edition / version: EN 12390-14:2018 (German version published October 2018).
• Number of pages: 21 (German edition).

Scope

This standard specifies a laboratory semi‑adiabatic method for determining the heat released by concrete during its hardening process. The method applies to specimens produced from concretes whose declared maximum aggregate size (Dmax) is not greater than 32 mm. The standard includes requirements for apparatus, specimen preparation and moulds, calibration of the calorimeter (to determine heat loss coefficient and calorimeter heat capacity), measurement procedures, data reduction and reporting. Annex B provides an informative procedure for conducting the test on-site.

Key topics and requirements

• Test principle: measurement of temperature rise in a concrete specimen in a semi‑adiabatic calorimeter and conversion to cumulative heat released (accounting for calorimeter heat capacity and heat loss to the environment).
• Apparatus: semi‑adiabatic calorimetric cell with insulated mould (typical mould volume ≥ 5 L), probe tube/diathermal fluid for thermometer contact, matched control calorimeter, and calibrated thermometry.
• Calibration: determination of heat loss coefficient and calorimeter heat capacity (Annex A), required before test series.
• Specimen requirements: representative fresh concrete sample, moulding and initial curing per the standard; applicable for Dmax ≤ 32 mm; limitations for rapid/quick‑setting cements noted.
• Data reduction and reporting: conversion of temperature history to heat (J/kg) vs time, presentation of cumulative heat evolution, reporting of specimen and test conditions (mix composition, cement type, ambient temperature, calibration data).
• Annex B (informative): special procedures and adaptations for on-site (field) semi‑adiabatic measurements.

Typical use and users

Laboratories performing concrete testing, cement and concrete producers, precast manufacturers, construction quality control teams, materials engineers and researchers use this standard to characterise heat of hydration, evaluate thermal risk (thermal cracking) in mass concrete, compare mixes and supplementary cementitious materials, and support mix design decisions that depend on heat evolution.

Related standards

This part is one element of the EN 12390 series (Testing hardened concrete). Commonly referenced related documents include EN 12390-1, -2, -3 (specimen shape, curing and compressive strength), EN 12390-15 (adiabatic method for heat determination), EN 12390-16 (shrinkage), EN 206 (specification for concrete) and relevant cement testing standards such as EN 196 series.

Keywords

semi‑adiabatic, calorimetry, heat of hydration, heat release, concrete hardening, EN 12390-14, DIN, calorimeter calibration, cumulative heat (J/kg), Dmax, thermal cracking, on-site measurement (Annex B).

FAQ

Q: What is this standard?

A: EN 12390-14:2018 (German version published by DIN) is a test method standard describing a semi‑adiabatic calorimetric procedure to determine the heat released by concrete during hydration and early hardening.

Q: What does it cover?

A: It covers apparatus, specimen preparation, calibration, measurement, data reduction and reporting for laboratory semi‑adiabatic tests, and includes an informative annex for adapting the procedure to on‑site measurements. It is intended for concretes with maximum aggregate size up to 32 mm.

Q: Who typically uses it?

A: Materials testing laboratories, concrete and cement manufacturers, precast producers, construction quality control and design engineers, and researchers studying heat evolution and thermal effects in concrete.

Q: Is it current or superseded?

A: The 2018 edition (EN 12390-14:2018, German version) is the current published edition for this part. Users should check national standardisation bodies for any later amendments or national annexes if absolute currency is required.

Q: Is it part of a series?

A: Yes — it is Part 14 of the EN 12390 series (Testing hardened concrete), which includes many other parts covering specimen preparation, strength tests, durability-related tests, adiabatic calorimetry (Part 15) and other properties.

Q: What are the key keywords?

A: Semi‑adiabatic, heat of hydration, calorimeter, heat release, concrete hardening, EN 12390-14, calibration, cumulative heat (J/kg), Dmax, on-site measurement.