1、Designation: C1686 09 (Reapproved 2017)Standard Practice forInstallation and Testing of Reinforced Autoclaved AeratedConcrete (AAC) Units1This standard is issued under the fixed designation C1686; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 of revision, 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. Scope1.1 This practice covers the installation and testing of solid,reinforced units made from autocl
3、aved aerated concrete(AAC), a cementitious product addressed by SpecificationC1693. The units are large-sized, factory-reinforced, solidrectangular prisms, laid using thin-bed mortar.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathemat
4、icalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not conside
5、red standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization Technic
6、alBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C1693 Specification for Autoclaved Aerated Concrete(AAC)3. Classification3.1 Reinforced AAC units installed in accordance with thispractice shall be classified according to their strength class.4. Materials and Manufactur
7、e4.1 Reinforced AAC units installed in accordance with thispractice shall be composed entirely of AAC material conform-ing to Specification C1693. The units themselves shall conformto Specification C1693.5. Significance and Use5.1 This practice is intended to regulate the installation ofreinforced A
8、AC units and to provide test methods for deter-mining their transverse load-displacement characteristics andload-carrying capacities.6. Shipping and Handling of Reinforced AAC ReinforcedElement6.1 Reinforced AAC elements shall be protected fromdamage during shipping by placement on pallets or others
9、upports, banding of the elements, placement of materialbetween the elements, or any other method deemed appropriateby the AAC manufacturer. Reinforced AAC elements shouldbe handled using lifting devices or clamps recommended bythe AAC manufacturer.7. Repair of Reinforced Elements7.1 Damage from hand
10、ling or shipping of reinforced AACelements shall be repaired using special AAC repair mortars. Ifthe damage is severe, theAAC manufacturer shall be consultedas to the structural integrity of the element. Damage that resultsin exposure of the reinforced element shall be repaired onlyafter the exposed
11、 steel is coated with a corrosion-resistantcoating as recommended by the AAC manufacturer.8. Field Cutting of Reinforced Elements8.1 Do not field-cut reinforced elements unless approved bythe project engineer and performed in accordance with theAAC manufacturers recommendations.9. Rejection9.1 If, u
12、pon delivery, an individual element fails to conformto this practice, the manufacturer shall be permitted to repairthe element to satisfy the specification, or to replace theelement.10. Expense of Tests10.1 Except as specified in Section 9, and unless otherwiseagreed, the expense of inspection and t
13、esting shall be theresponsibility of the purchaser.1This practice is under the jurisdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.60 onPrecast Autoclaved Aerated Concrete.Current edition approved June 1, 2017. Published July 2017. Orig
14、inally approvedin 2009. Last previous edition approved in 2009 as C21209. DOI: 10.1520/C1686-09R17.2For 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 Doc
15、ument Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on
16、Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.111. Installation of Reinforced AAC Units11.1 Installed units covered by this practice shall beprotected against direct exposure to
17、moisture using a coatingmaterial accepted by the AAC unit manufacturer.NOTE 1The rest of this section is blank until installation requirementsare developed.12. Determination of Transverse Load-DisplacementCharacteristics of Reinforced AAC Elements12.1 ScopeThe scope of this practice is to determine
18、thedeflection and the load bearing capacity (ultimate load) of theseelements.12.2 Apparatus:12.2.1 The testing machine shall allow a service load to beimposed with an accuracy of 5 % and an ultimate load with anaccuracy of 2 %.12.2.2 The testing machine shall support the reinforcedelement on two sim
19、ple supports made of steel. One supportshall be fixed in the plane of the element, and the other shall befree to move in that plane. The supports shall support the entirewidth of the element. The bearing length shall be adjustable, sothat the minimum bearing length shall be equivalent to the leastbe
20、aring length supplied by the manufacturer or a minimum of1.6 in. (40 mm).12.2.3 The deflection gauge shall allow the deflection to bedetermined with a precision of 0.02 in. (0.5 mm).12.3 Test SpecimensThe test specimens shall consist ofcomplete reinforced AAC elements as supplied by the AACmanufactu
21、rer. The elements to be tested shall have attained thesame temperature as the testing environment. The moisturecontent of the specimens shall be between 10 and 40 % bymass as determined by Specification C1693. If the dry densityof the AAC material is known to an accuracy of 5 %, then themoisture con
22、tent shall be permitted to be determined bycalculation based on the mass and volume of the element andthe mass of the reinforcement. The mass of the specimens shallbe determined before testing to an accuracy of 10 lb (4.5 kg).Report the moisture content of the AAC at time of test.12.4 Procedure:12.4
23、.1 Apply equal loads to the two quarter points as shownin Fig. 1. Apply the loads through steel shapes placed on softfiberboard with a thickness of 0.4 to 0.50 in. (10 to 12 mm).The steel profiles shall have sufficient bearing area to producean even bearing pressure not exceeding 50 % of the specifi
24、edcompressive strength of the AAC material. The bearing areashall cover the entire width of the element, and its extensionalong the length of the element shall not be less than 4 in. (100mm).12.4.2 Measure out-of-plane deflection at midspan, eitheron both sides of the element or in the center. Take
25、the firstdeflection reading when the element is resting on the supportswithout any imposed load. Then place the loading apparatus inposition and apply load, at a rate sufficient to reach the serviceload after 2 min. Maintain the service load for 5 min whileinspecting the element for cracking. If cra
26、cks are found,measure their width at a level corresponding to the bottom ofthe reinforcement. After that 5-min period, measure and recordthe deflection of the element under service load. Then load theelement to failure within a period not less than 2 min. Recordthe failure load and failure mode. Bef
27、ore removing the elementfrom the testing apparatus, record the number and size of all ofthe reinforcing wires and their AAC cover.13. Precision and Bias13.1 The precision and bias of the test procedures are beingdetermined and will be provided when sufficient data areavailable to indicate acceptable
28、 tolerances in repeatability andreproducibility.14. Keywords14.1 AAC; autoclaved aerated concrete; installation; load-displacement characteristics; reinforced autoclaved aeratedconcreteNOTE 1Position of Applied Loads:Ls= clear span,Sb= bearing length of support, andPl= imposed test load.FIG. 1 Trans
29、verse Loading (Flexural) TestC1686 09 (2017)2ASTM 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 that determination of the validity of any such patent rights, an
30、d 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 reapproved or withdrawn. Your comments are invited either for revisi
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32、ouldmake 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 reprints (single or multiple copies) of this standard may be obt
33、ained 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 09 (2017)3
