1、Designation: C1438 13Standard Specification forLatex and Powder Polymer Modifiers for use in HydraulicCement Concrete 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 revis
2、ion, the 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 latexand powder polymers when used as modifiers i
3、n hydrauliccement concrete and mortar to improve adhesion and reducepermeability (see Note 1).NOTE 1For further information concerning theory, benefits,limitations, and applications of polymer-modified hydraulic cementitiousmixtures, refer to ACI 548.3R-09.21.2 The performance criteria are based on
4、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 referen
5、ce 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 concerns,if
6、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:3C125 Terminology Relating to Concrete and Concrete
7、 Ag-gregatesC494/C494M Specification for Chemical Admixtures forConcreteC1439 Test Methods for Evaluating Latex and PowderPolymer Modifiers for use in Hydraulic Cement Concreteand Mortar3. Terminology3.1 Definitions of Terms Specific to This StandardTermsused in this specification are defined in Ter
8、minology 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 powderformulated for use with hydraulic cemen
9、ts.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 or flow.3.1.6 test concrete or mor
10、tar, nconcrete or mortar contain-ing 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 areas not exposed to moisture.4.1
11、.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.6. Physical and Mechanical Properties6.1 The polymer modifier shall produce test mortar or testconcrete whic
12、h conforms to the requirements listed in Table 1for the type specified.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.44 on Polymer-Modified Concrete and Mortars.Current edition approved Nov. 1
13、5, 2013. Published December 2013. Originallyapproved in 1999. Last previous edition approved in 2011 as C143811a. DOI:10.1520/C1438-13.2ACI 548.3R-09 Report on Polymer-Modified Concrete. Available from Ameri-can Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, MI 48333-9094,http:/www.concr
14、ete.org.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 standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of t
15、his standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17. 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
16、 evaluation following 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
17、 andidentification 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
18、purchaser.9.2 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 app
19、licable requirements 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 t
20、han that marked 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
21、 beprovided in 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,C143811a, that
22、may impact the use of this specification. (Approved November 15, 2013)(1) In the title, the words “for use” were inserted after“Modifiers.”(2) In the scope, the term “redispersible” was removed.“Latex.” “powder,” “concrete,” and “mortar” are now singular.“Polymers” was added.TABLE 1 Requirements for
23、 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 1:00nor, later 3:30 3:30 3:30Final:not more than, earlier 1:00 1:00 1
24、: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 132ASTM Internation
25、al 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 that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their
26、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 reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be
27、addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,
28、 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 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 the ASTM website (www.astm.org/COPYRIGHT/).C1438 133
