1、Designation:C158513Standard Test Method forMeasurement of Rate of Absorption of Water by Hydraulic-Cement Concretes1This standard is issued under the fixed designation C1585;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method is used to determine the rate ofabsorption(sorptivity)of water by hydraulic cement concreteby measuring
3、the increase in the mass of a specimen resultingfrom absorption of water as a function of time when only onesurface of the specimen is exposed to water.The specimen isconditioned in an environment at a standard relative humidityto induce a consistent moisture condition in the capillary poresystem.Th
4、e exposed surface of the specimen is immersed inwater and water ingress of unsaturated concrete is dominatedby capillary suction during initial contact with water.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This stand
5、ard 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 determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM S
6、tandards:2C31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC125 Terminology Relating to Concrete and Concrete Ag-gregatesC192/C192M Practice for Making and Curing Concrete TestSpecimens i
7、n the LaboratoryC642 Test Method for Density,Absorption,and Voids inHardened ConcreteC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC1202 Test Method for Electrical Indication of ConcretesAbility to Resist Chlori
8、de Ion Penetration3.Terminology3.1 DefinitionsFor definitions of terms used in thisstandard,refer to Terminology C125.4.Significance and Use4.1 The performance of concrete subjected to many aggres-sive environments is a function,to a large extent,of thepenetrability of the pore system.In unsaturated
9、 concrete,therate of ingress of water or other liquids is largely controlled byabsorption due to capillary rise.This test method is based onthat developed by Hall3who called the phenomenon“watersorptivity.”4.2 The water absorption of a concrete surface depends onmany factors including:(a)concrete mi
10、xture proportions;(b)the presence of chemical admixtures and supplementary ce-mentitious materials;(c)the composition and physical charac-teristics of the cementitious component and of the aggregates;(d)the entrained air content;(e)the type and duration ofcuring;(f)the degree of hydration or age;(g)
11、the presence ofmicrocracks;(h)the presence of surface treatments such assealers or form oil;and(i)placement method includingconsolidation and finishing.Water absorption is also stronglyaffected by the moisture condition of the concrete at the time oftesting.4.3 This method is intended to determine t
12、he susceptibilityof an unsaturated concrete to the penetration of water.Ingeneral,the rate of absorption of concrete at the surface differsfrom the rate of absorption of a sample taken from the interior.The exterior surface is often subjected to less than intendedcuring and is exposed to the most po
13、tentially adverse condi-tions.This test method is used to measure the water absorptionrate of both the concrete surface and interior concrete.Bydrilling a core and cutting it transversely at selected depths,the1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete
14、Aggregates and is the direct responsibility of SubcommitteeC09.66 on Concretes Resistance to Fluid Penetration.Current edition approved Feb.1,2013.Published February 2013.Originallyapproved in 2004.Last previous edition approved in 2011 as C1585 11.DOI:10.1520/C1585-13.2For referenced ASTM standards
15、,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Hall,C.,“Water Sorptivity of Mortars and Concretes:A Review,”Magazine ofConcrete Research,Vol 4
16、1,No.147,June 1989,pp.5161.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 absorption can be evaluated at different distances from theexposed surface.The core is drilled vertically or horizontally.4.4 This test method differs from Test Method C642 inwhich the specimens are oven dried,immersed completely inwater at 21C,and then boiled under water for 5 h.In this testmetho
