Methods of testing cement - Part 8: Heat of hydration - Solution method

This European Standard describes a method of determining the heat of hydration of cements by means of solution calorimetry, also known as the solution method. The heat of hydration is expressed in joules per gram of cement.
This standard is applicable to cements and hydraulic binders whatever their chemical composition.
NOTE 1   Another procedure, called the semi-adiabatic method, is described in EN 196-9. Either procedure can be used independently.
NOTE 2   It has been demonstrated that the best correlation between the two methods is obtained at seven days for the solution method (EN 196-8) compared with 41 h for the semi-adiabatic method (EN 196-9).

Prüfverfahren für Zement - Teil 8: Hydratationswärme - Lösungsverfahren

Diese Europäische Norm beschreibt ein Verfahren zur Messung der Hydratationswärme von Zementen mit Hilfe eines Lösungskalorimeters, das so genannte Lösungsverfahren. Die Hydratationswärme wird in Joule je Gramm Zement angegeben.
Diese Europäische Norm gilt für Zemente und hydraulische Bindemittel, ungeachtet ihrer chemischen Zusam-men¬setzung.
ANMERKUNG 1   Ein anderes Verfahren, das so genannte teiladiabatische Verfahren, ist in EN 196-9 beschrieben. Beide Verfahren können unabhängig voneinander angewendet werden.
ANMERKUNG 2   Es wurde nachgewiesen, dass sich die beste Korrelation zwischen den beiden Verfahren nach sieben Tagen bei Hydratation nach dem Lösungsverfahren (EN 196-8) und nach 41 h bei Hydratation nach dem teiladia¬batischen Verfahren (EN 196-9) ergibt.

Méthodes d'essais des ciments - Partie 8: Chaleur d'hydratation - Méthode par dissolution

La présente norme européenne décrit une méthode de mesure de la chaleur d’hydratation des ciments par
calorimétrie de dissolution, appelée méthode par dissolution. La chaleur d’hydratation est exprimée en joules
par gramme de ciment.
La présente norme s’applique aux ciments et aux liants hydrauliques quelle que soit leur composition
chimique.
NOTE 1 Une autre méthode, dite méthode semi-adiabatique, est décrite dans la norme EN 196-9. Les deux
méthodes peuvent être utilisées indépendamment.
NOTE 2 Il a été démontré que la meilleure corrélation entre les deux méthodes est obtenue en comparant les valeurs
à 7 jours par la méthode par dissolution (EN 196-8) et à 41 heures par la méthode semi-adiabatique (EN 196-9).

Metode preskušanja cementa - 8. del: Toplota hidratacije - Metoda raztapljanja

Ta evropski standard opisuje metodo za določanje toplote hidratacije cementov s pomočjo kalorimetrije raztapljanja, ki je znana tudi kot metoda raztapljana. Toplota hidratacije je izražena v joulih na gram cementa. Ta standard velja za cemente in hidravlična veziva, ne glede na njihovo kemično sestavo.

General Information

Status
Published
Public Enquiry End Date
19-Nov-2009
Publication Date
05-May-2010
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
CAA - Mineral binders and masonry
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
23-Apr-2010
Due Date
28-Jun-2010
Completion Date
06-May-2010
Directive
305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
89/106/EEC - Construction products
Mandate
M/114 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on cements, buliding limes, and other hydr. binders
Ref Project
EN 196-8:2010 - Methods of testing cement - Part 8: Heat of hydration - Solution method

Relations

Replaces
SIST EN 196-8:2004 - Methods of testing cement - Part 8: Heat of hydration - Solution method
Effective Date
01-Jun-2010

Overview

EN 196-8:2010 - Methods of testing cement - Part 8: Heat of hydration - Solution method (CEN) specifies a laboratory solution calorimetry procedure to determine the heat of hydration of cements and hydraulic binders. Results are reported in joules per gram (J/g) of cement. The method measures the difference between the heat of solution of anhydrous and hydrated cement samples under standardized conditions.

Key topics and technical requirements

  • Scope: Applicable to cements and hydraulic binders regardless of chemical composition.
  • Principle: Heat of hydration Hi = Qa − Qi, where Qa is the heat of solution of anhydrous cement and Qi that of cement hydrated for a defined period (e.g., 7 days).
  • Standardized hydration conditions:
    • Water/cement ratio: 0.40
    • Neat cement paste (no additives)
    • Storage temperature during hydration: 20.0 ± 0.2 °C
  • Acid mixture: Analytical-quality acid mixture using hydrofluoric acid (HF) and nitric acid (HNO3) (document gives exact proportions). IMPORTANT: HF is highly corrosive and requires strict safety precautions.
  • Calorimeter and apparatus:
    • Insulated dissolution vessel (e.g., Dewar-type) with stirrer and accurate thermometer (Beckmann thermometers or thermistors/platinum resistance thermometers).
    • Calorimeter characteristics to be determined: thermal capacity (C) and thermal leakage coefficient (K) via calibration.
    • Calibration uses ignited zinc oxide (ZnO) dissolved in the acid mixture; procedures for sample handling, timing and temperature averaging are specified.
  • Sample preparation:
    • Anhydrous cement stored dry and homogenized; metallic iron removed.
    • Hydrated cement prepared by mixing 100.0 g cement with 40.0 g water for 3 minutes and curing in sealed vials at 20.0 °C.
  • Precision: The standard includes repeatability and reproducibility information and guidance on reporting results.

Applications and users

  • Quality control in cement production to monitor reactivity and consistency.
  • R&D and product development to compare binder formulations and additives.
  • Construction materials laboratories performing standardized cement testing.
  • Regulatory and certification bodies assessing compliance with performance requirements.
  • Useful for assessing early and longer-term hydration energetics (noting best correlation with semi-adiabatic methods at seven days for this solution method).

Related standards

  • EN 196-9: Heat of hydration - Semi-adiabatic method (alternative procedure; either method may be used independently).
  • EN 197-1: Cement - Composition and specifications (normative reference in EN 196-8).
  • Other parts of EN 196 series (strength, setting times, fineness, sampling).

Keywords: EN 196-8:2010, heat of hydration, solution calorimetry, cement testing, calorimeter calibration, joules per gram, CEN, EN 196.

Frequently Asked Questions

SIST EN 196-8:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Methods of testing cement - Part 8: Heat of hydration - Solution method". This standard covers: This European Standard describes a method of determining the heat of hydration of cements by means of solution calorimetry, also known as the solution method. The heat of hydration is expressed in joules per gram of cement. This standard is applicable to cements and hydraulic binders whatever their chemical composition. NOTE 1 Another procedure, called the semi-adiabatic method, is described in EN 196-9. Either procedure can be used independently. NOTE 2 It has been demonstrated that the best correlation between the two methods is obtained at seven days for the solution method (EN 196-8) compared with 41 h for the semi-adiabatic method (EN 196-9).

This European Standard describes a method of determining the heat of hydration of cements by means of solution calorimetry, also known as the solution method. The heat of hydration is expressed in joules per gram of cement. This standard is applicable to cements and hydraulic binders whatever their chemical composition. NOTE 1 Another procedure, called the semi-adiabatic method, is described in EN 196-9. Either procedure can be used independently. NOTE 2 It has been demonstrated that the best correlation between the two methods is obtained at seven days for the solution method (EN 196-8) compared with 41 h for the semi-adiabatic method (EN 196-9).

SIST EN 196-8:2010 is classified under the following ICS (International Classification for Standards) categories: 91.100.10 - Cement. Gypsum. Lime. Mortar. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 196-8:2010 has the following relationships with other standards: It is inter standard links to SIST EN 196-8:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 196-8:2010 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC; Standardization Mandates: M/114. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

SIST EN 196-8:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Metode preskušanja cementa - 8. del: Toplota hidratacije - Metoda raztapljanjaPrüfverfahren für Zement - Teil 8: Hydratationswärme - LösungsverfahrenMethods of testing cement - Part 8: Heat of hydration - Solution method91.100.10Cement. Mavec. Apno. MaltaCement. Gypsum. Lime. MortarICS:Ta slovenski standard je istoveten z:EN 196-8:2010SIST EN 196-8:2010en,fr,de01-junij-2010SIST EN 196-8:2010SLOVENSKI
STANDARDSIST EN 196-8:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 196-8
March 2010 ICS 91.100.10 Supersedes EN 196-8:2003English Version
Methods of testing cement - Part 8: Heat of hydration - Solution method
Prüfverfahren für Zement - Teil 8: Hydratationswärme - Lösungsverfahren This European Standard was approved by CEN on 21 February 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 196-8:2010: ESIST EN 196-8:2010
...

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