ASTM C186

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Designation: C186 −17

Standard Test Method for

Heat of Hydration of Hydraulic Cement

1

This standard is issued under the fixed designation C186; the number immediately following the designation indicates the year of

original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A

superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Scope*

1.1 This test method covers the determination of the heat of

hydration of a hydraulic cement by measuring the heat of

solution of the dry cement and the heat of solution of a separate

portion of the cement that has been partially hydrated for 7 and

for 28 days, the difference between these values being the heat

of hydration for the respective hydrating period.

1.2 The results of this test method may be inaccurate if

some of the components of the hydraulic cement are insoluble

in the nitric acid/hydrofluoric acid solution.

1.3 The values stated in SI units are to be regarded as

standard. No other units of measurement are included in this

standard.

1.4 Values in SI units shall be obtained by measurement in

SI units or by appropriate conversion, using the Rules for

Conversion and Rounding given in Standard IEEE/ASTM SI

10, or measurements made in other units.

1.5 This standard does not purport to address all of the

safety concerns, if any, associated with its use. It is the

responsibility of the user of this standard to establish appro-

priate safety, health, and environmental practices and deter-

mine the applicability of regulatory limitations prior to use.

Warning—Fresh hydraulic cementitious mixtures are caustic

and may cause chemical burns to skin and tissue upon

prolonged exposure.

2

1.6 This international standard was developed in accor-

dance with internationally recognized principles on standard-

ization established in the Decision on Principles for the

Development of International Standards, Guides and Recom-

mendations issued by the World Trade Organization Technical

Barriers to Trade (TBT) Committee.

2. Referenced Documents

2.1 ASTM Standards:

3

C109/C109M Test Method for Compressive Strength of

Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube

Specimens)

C114 Test Methods for Chemical Analysis of Hydraulic

Cement

C670 Practice for Preparing Precision and Bias Statements

for Test Methods for Construction Materials

C1005 Specification for Reference Masses and Devices for

Determining Mass and Volume for Use in the Physical

Testing of Hydraulic Cements

E11 Specification for Woven Wire Test Sieve Cloth and Test

Sieves

IEEE/ASTM SI 10 Standard for Use of the International

System of Units (SI): The Modern Metric System

3. Significance and Use

3.1 The purpose of this test is to determine if the hydraulic

cement under test meets the heat of hydration requirement of

the applicable hydraulic cement specification.

3.2 This test may also be used for research purposes when it

is desired to determine the heat of hydration of hydraulic

cement at any age.

NOTE 1—When tests are performed for research purposes, useful

additional information can be obtained by determining fineness, chemical

and compound compositions.

3.3 Determination of the heat of hydration of hydraulic

cements provides information that is helpful for calculating

temperature rise in mass concrete.

4. Apparatus

4.1 Calorimetric Apparatus:

4.1.1 Calorimeter—The calorimeter, such as that illustrated

in Fig. 1, shall consist of a 0.5 L, wide-mouth vacuum jar, with

1

This test method is under the jurisdiction of ASTM Committee C01 on Cement

and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.

Current edition approved Oct. 1, 2017. Published November 2017. Originally

approved in 1944. Last previous edition approved in 2015 as C186 – 15a. DOI:

10.1520/C0186-17.

2

Section on Safety, Manual of Cement Testing, Annual Book of ASTM

Standards, Vol 04.01.

3

For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at [email protected]. For Annual Book of ASTM

Standards volume information, refer to the standard’s Document Summary page on

the ASTM website.

*A Summary of Changes section appears at the end of this standard

Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the

Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

1

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