1、Designation: C1438 99 (Reapproved 2005)e1Standard Specification forLatex and Powder Polymer Modifiers for 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
2、case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEParagraphs 1.2 and 1.3 were revised editorially November 2005.1. Scope1.1 This specification
3、covers performance criteria for la-texes and redispersible powders when used as modifiers 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 hyd
4、raulic cementitious mix-tures, refer to ACI 548.3R-95.1.2 The performance criteria are based on certain propertychanges that are achieved by use of the polymer modifier whencompared to reference concrete or mortar (Test MethodsC 1439).1.3 Prepackaged, proprietary mortar products are not in-cluded in
5、 this specification. Also, this specification covers onlythose materials contained in the reference or test mixtureslisted in Test Methods C 1439.1.4 The values stated in SI units are to be regarded asstandard.1.5 The following precautionary statement pertains only tothe test method portion, Section
6、 10, of this specification: Thisstandard does not purport to address all of the safety concerns,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 t
7、o use.2. Referenced Documents2.1 ASTM Standards:2C 125 Terminology Relating to Concrete and ConcreteAggregatesC 494/C 494M Specification for Chemical Admixtures forConcreteC 1439 Test Methods for Polymer-Modified Mortar andConcrete2.2 ACI Standard:ACI 548.3R-95 State-of-the-Art Report on Polymer-Mod
8、ified Concrete33. Terminology3.1 Definitions of Terms Specific to This StandardTermsused in this specification are defined in Terminology C 125 orin this section.3.1.1 latex, na dispersion of organic polymer particles inwater.3.1.2 polymer-modified concrete or mortar, na hydrauliccement concrete or
9、mortar containing a polymer modifier.3.1.3 polymer modifier, nlatex or redispersible powderformulated 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 ag
10、gregates given in TestMethods C 1439 and having an amount of water to achieve thespecified slump 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.
11、 Classification4.1 Polymer modifiers are classified into two product types:4.1.1 Type IFor use in areas not exposed to moisture.4.1.2 Type IIFor general use.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of Subc
12、ommitteeC09.44 on Polymer-Modified Concrete.Current edition approved Nov. 1, 2005. Published January 2006. Originallyapproved in 1999. Last previous edition approved in 1999 as C 1438 99e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servic
13、eastm.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, FarmingtonHills, MI 48333.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho
14、cken, PA 19428-2959, United States.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 testconc
15、rete 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 following Specification C 494,with
16、 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 andidentification of each shipment, in a suitable b
17、uilding 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 Sampling shall conform to the requirem
18、ents of Specifi-cation C 494.10. Test Methods10.1 Test the polymer modifier in accordance with therequirements of Test Methods C 1439.11. Rejection11.1 The purchaser has the right to reject the polymermodifier if it fails to meet any of the applicable requirements ofthis specification.11.2 It is per
19、mitted 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 marked on the packages.12. Packaging and Packag
20、e 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 in the shipping papers accompanying bulk shi
21、pmentsof the polymer modifier.13. Keywords13.1 latex; polymer modifier; polymer-modified concrete ormortarASTM 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 tha
22、t 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 reappro
23、ved 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 you fe
24、el 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 rep
25、rints (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).TABLE 1 Requirements for Test Mortar and Concrete Made WithPolymer Modifier
26、MORTAR 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 1:00nor, 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 99 (2005)e12
