1、Designation: C1438 11Standard Specification forLatex and Powder Polymer Modifiers in Hydraulic CementConcrete and Mortar1This standard is issued under the fixed designation C1438; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of 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 specification covers performance criteria for la-texes and redispersible powders when used as modifiers
3、 inhydraulic cement concretes and mortars to improve adhesionand reduce permeability (see Note 1).NOTE 1For further information concerning theory, benefits, limita-tions, and applications of polymer-modified hydraulic cementitious mix-tures, refer to ACI 548.3R-09.1.2 The performance criteria are ba
4、sed on certain propertychanges that are achieved by use of the polymer modifier whencompared to reference concrete or mortar (Test MethodsC1439).1.3 Prepackaged, proprietary mortar products are not in-cluded in this specification. Also, this specification covers onlythose materials contained in the
5、reference or test mixtureslisted in Test Methods C1439.1.4 The values stated in SI units are to be regarded asstandard.1.5 The following precautionary statement pertains only tothe test method portion, Section 10, of this specification: Thisstandard does not purport to address all of the safety conc
6、erns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2C125 Terminology Relating to Concrete and
7、Concrete Ag-gregatesC494/C494M Specification for Chemical Admixtures forConcreteC1439 Test Methods for Evaluating Polymer Modifiers inMortar and Concrete2.2 ACI Standard:ACI 548.3R-09 Report on Polymer-Modified Concrete33. Terminology3.1 Definitions of Terms Specific to This StandardTermsused in thi
8、s specification are defined in Terminology C125 or inthis section.3.1.1 latex, na dispersion of organic polymer particles inwater.3.1.2 polymer-modified concrete or mortar, na hydrauliccement concrete or mortar containing a polymer modifier.3.1.3 polymer modifier, nlatex or redispersible powderformu
9、lated for use with hydraulic cements.3.1.4 redispersible powder, npowder that redisperses inwater to form a latex.3.1.5 reference concrete or mortar, nconcrete or mortarhaving the amounts of cement and aggregates given in TestMethods C1439 and having an amount of water to achieve thespecified slump
10、or flow.3.1.6 test concrete or mortar, nconcrete or mortar con-taining a polymer modifier and having the same composition(except for water content) and slump or flow as the referenceconcrete or mortar.4. Classification4.1 Polymer modifiers are classified into two product types:4.1.1 Type IFor use in
11、 areas not exposed to moisture.4.1.2 Type IIFor general use.5. Ordering Information5.1 The purchaser shall specify the type of polymer modifierdesired and the size and type of containers in which thematerial is to be supplied.1This specification is under the jurisdiction of ASTM Committee C09 onConc
12、rete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.44 on Polymer-Modified Concrete and Mortars.Current edition approved June 15, 2011. Published July 2011. Originallyapproved in 1999. Last previous edition approved in 2005 as C143899(2005)1.DOI: 10.1520/C1438-11.2For re
13、ferenced 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 standards Document Summary page onthe ASTM website.3Available from American Concrete Institute (ACI), P.O. Box 9094, Fa
14、rmingtonHills, MI 48333-9094, http:/www.concrete.org.1*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.6. Physical and Mechanical Properties6.1 The polymer modifier shal
15、l produce test mortar or testconcrete which conforms to the requirements listed in Table 1for the type specified.7. Lot Uniformity and Equivalence7.1 When specified by the purchaser, the uniformity of a lot,or the equivalence of different lots from the same source shallbe established by evaluation f
16、ollowing Specification C494/C494M, with the following exception:7.1.1 Residue by Oven DryingWithin a range not greaterthan 2 percentage points of the initial sample.8. Storage8.1 The supplier shall store the polymer modifier in such amanner as to permit easy access for proper inspection andidentific
17、ation of each shipment, in a suitable building that willprotect the polymer modifier from dampness and freezing, andin accordance with manufacturers recommendations.9. Sampling and Inspection9.1 The supplier shall provide facilities for proper samplingof the product as specified by the purchaser.9.2
18、 Sampling shall conform to the requirements of Specifi-cation C494/C494M.10. Test Methods10.1 Test the polymer modifier in accordance with therequirements of Test Methods C1439.11. Rejection11.1 The purchaser has the right to reject the polymermodifier if it fails to meet any of the applicable requi
19、rements ofthis specification.11.2 It is permitted to reject packages that are more than2 % below the mass or volume marked on them, and it ispermitted to reject the entire shipment if the average mass ofpackages in any shipment, as shown by weighing 50 packagestaken at random, is less than that mark
20、ed on the packages.12. Packaging and Package Marking12.1 When the polymer modifier is delivered in packagesand containers, the proprietary name of the polymer modifier,the type under this specification, and the net mass or volumeshall be plainly marked thereon. Similar information shall beprovided i
21、n the shipping papers accompanying bulk shipmentsof the polymer modifier.13. Keywords13.1 latex; polymer modifier; polymer-modified concrete ormortarSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this specification since the last issue,C143899(2005)1, that may imp
22、act the use of this specification. (Approved June 15, 2011)(1) Replaced the word “for” with “in” in the title.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised
23、 that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either rea
24、pproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If yo
25、u feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual
26、 reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from t
27、he ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Requirements for Test Mortar and Concrete Made WithPolymer ModifierMORTAR CONCRETEType I Type II Type IIAir Content, % maximum 12.0 12.0 7.0Time of Setting, allowable deviationfrom reference mixture, h:min:Initial:not more than, earlier 1:00 1:00 1:0
28、0nor, later 3:30 3:30 3:30Final:not more than, earlier 1:00 1:00 1:00nor, later 3:30 3:30 3:30Compressive Strength, minimum %of reference mixtureat each age 70 70 80Bond Strength, minimum % ofreference mixtureat each age 140 140 140Indication of Chloride Ionpenetration, maximum % ofreference mixtureat each age naA25 25Ana = not applicable.C1438 112
