1、Designation:C672/C672M12Standard Test Method forScaling Resistance of Concrete Surfaces Exposed toDeicing Chemicals1This standard is issued under the fixed designation C672/C672M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the ye
2、ar 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.Scope1.1 This test method covers the determination of the resis-tance to scaling of a horizontal concrete surface exposed tof
3、reezing-and-thawing cycles in the presence of deicing chemi-cals.It is intended for use in evaluating this surface resistancequalitatively by visual examination.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theinch-pound units a
4、re shown in brackets.The values stated ineach system are not exact equivalents;therefore,each systemshall be used independently of the other.1.3 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
5、establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C143/C143M Test Method for Slump of Hydraulic-CementConcreteC156 Test Method for Water Loss from a Mortar SpecimenThrough Liquid Membra
6、ne-Forming Curing Compoundsfor ConcreteC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC233 Test
7、Method for Air-Entraining Admixtures for Con-creteC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and Concretes3.Significance and Use3.1 This test method can be used to evaluate the effect ofmixture proportioning,surface
8、treatment,curing,or othervariables on resistance to scaling.3.2 This test method is not intended to be used in determin-ing the durability of aggregates or other ingredients of theconcrete.3.3 No relationship has been established between the frostimmunity of specimens cut from hardened concrete ands
9、pecimens prepared in the laboratory.4.Apparatus4.1 Freezing EquipmentA chest or room of sufficient sizeto hold the specimens and capable of lowering the temperatureof the specimens to 18 6 3C 0 6 5F within 16 to 18 h andmaintaining this temperature with a full load of specimens.4.2 Molds,of the prop
10、er size for the test specimens to beused,and conforming to the requirements of Practice C192/C192M.4.3 Tamping Rod,conforming to the requirements of TestMethod C143/C143M.4.4 Small ToolsWood strike-off board,steel trowel,andmoderately stiff bristle brush suitable for providing the desiredtexture of
11、the test surface.4.5 Slump Cone,conforming to the requirements of TestMethod C143/C143M.4.6 Air Meter,conforming to the requirements of TestMethod C173/C173M or Test Method C231.4.7 Scales,conforming to the requirements of PracticeC192/C192M.4.8 Concrete Mixer,conforming to the requirements ofPracti
12、ce C192/C192M.5.Proportioning and Mixing5.1 ProportioningThe air content,cement factor,slump,water-to-cement ratio,and other characteristics of the concrete1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of Subcommi
13、tteeC09.67 on Resistance to the Environment.Current edition approved April 15,2012.Published May 2012.Originallyapproved in 1971.Last previous edition approved in 1993 as C672/C672M93which was withdrawn 2011 and reinstated in April 2012.DOI:10.1520/C0672_C0672M-12.2For referenced ASTM standards,visi
14、t 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United
15、 States1 and its ingredients shall be those appropriate for the purposesfor which the tests are to be made.Concrete with the followingcharacteristics has been found useful for the purposes forwhich this test method is generally used,such as evaluation ofa surface treatment for prevention of scaling:
16、(a)non-air-entrained;(b)cement content,335 6 5 kg/m3565 6 10 lb/yd3;(c)slump,75 6 15 mm 3 6 0.5 in.;and(d)durableaggregate(Note 1)of 25-mm 1-in.maximum size.If air-entrained concrete is to be used for comparative purposes,itshall have the same proportions as that with which it is beingcompared and the air content shall be 6 6 1%(Note 2).NOTE1Care should be taken to use an aggregate which has a goodperformance record in freezing and thawing exposure.NOTE2For additional information pertaining to a
