1、Designation:C18615aStandard Test Method forHeat of Hydration of Hydraulic Cement1This standard is issued under the fixed designation C186;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parenthes
2、es indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the heat ofhydration of a hydraulic cement by measuring the heat ofsolution of the dry cement and the heat of sol
3、ution of a separateportion of the cement that has been partially hydrated for 7 andfor 28 days,the difference between these values being the heatof hydration for the respective hydrating period.1.2 The results of this test method may be inaccurate ifsome of the components of the hydraulic cement are
4、 insolublein the nitric acid/hydrofluoric acid solution.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 Values in SI units shall be obtained by measurement inSI units or by appropriate conversion,using the Rules forConver
5、sion and Rounding given in Standard IEEE/ASTM SI10,or measurements made in other units.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and
6、 determine the applica-bility or regulatory limitations prior to use.WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.22.Referenced Documents2.1 ASTM Standards:3C109/C109M Test Method for Compressive Strength ofHydraulic C
7、ement Mortars(Using 2-in.or 50-mm CubeSpecimens)C114 Test Methods for Chemical Analysis of HydraulicCementC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in
8、 the PhysicalTesting of Hydraulic CementsE11 Specification for Woven Wire Test Sieve Cloth and TestSievesIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System3.Significance and Use3.1 The purpose of this test is to determine if the hydrauliccement under te
9、st meets the heat of hydration requirement ofthe applicable hydraulic cement specification.3.2 This test may also be used for research purposes when itis desired to determine the heat of hydration of hydrauliccement at any age.NOTE1When tests are performed for research purposes,usefuladditional info
10、rmation can be obtained by determining fineness,chemicaland compound compositions.3.3 Determination of the heat of hydration of hydrauliccements provides information that is helpful for calculatingtemperature rise in mass concrete.4.Apparatus4.1 Calorimetric Apparatus:4.1.1 CalorimeterThe calorimete
11、r,such as that illustratedin Fig.1,shall consist of a 0.5 L,wide-mouth vacuum jar,withcork stopper,or other suitable non-reactive stopper held in asuitably insulated container(see 4.1.2)to keep the vacuum jarin position and to protect the jar from undue temperaturefluctuations.The vacuum jar shall b
12、e coated on the interiorwith a material resistant to hydrofluoric acid,such as a bakedphenolic resin,a baked vinyl chloride acetate resin,or bees-wax.The acid-resistant coating shall be intact and free ofcracks at all times;it shall be examined frequently and renewedwhenever necessary.As another mea
13、ns of protecting thevacuum jar,a plastic liner of suitable size may be used insteadof coating the interior of the jar.The contents of the vacuum jarshall not change more than 0.001C/min per degree differencefrom room temperature when filled with 425 g of the acidspecified in 6.2,stoppered,and allowe
14、d to stand unstirred for1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.Current edition approved April 1,2015.Published May 2015.Originallyapproved in 1944.Last previous edition approved in 2015 a
15、s C186 15.DOI:10.1520/C0186-15A.2Section on Safety,Manual of Cement Testing,Annual Book of ASTMStandards,Vol 04.01.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the st
16、andards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 30 min.The temperature for this check shall approximate thestarting temperatures to be used in making the determination.4.1.2 Insulated ContainerThe container shall have aninsulating layer of a material such as non-reactive foam,cotton,or fiber-glass,which shall be at least 25 mm in thickness andshall encase the sides and bottom of the vac