ASTM C1506-2017 Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters《水硬性水泥基灰浆和灰泥保水性的标准试验方法》.pdf
《ASTM C1506-2017 Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters《水硬性水泥基灰浆和灰泥保水性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1506-2017 Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters《水硬性水泥基灰浆和灰泥保水性的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C1506 17Standard Test Method forWater Retention of Hydraulic Cement-Based Mortars andPlasters1This standard is issued under the fixed designation C1506; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、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 test method provides for the determination of waterretention of hydraulic cement-based mortars and plasters.1.2 The v
3、alues stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard. When this test method refers to combined-unitstandards, the selection of the measurement systems is at theusers discretion.1.3 This standard does not purport to address all of thesafet
4、y concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health and environmental practices and deter-mine the applicability of regulatory limitations prior to use.(WarningFresh hydraulic cementitious mixtures are causticand
5、may cause chemical burns to skin and tissue uponprolonged exposure.)21.4 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-m
6、endations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars (Using 2-in. or 50-mm CubeSpecimens)C185 Test Method for Air Content of Hydraulic CementMo
7、rtarC230/C230M Specification for Flow Table for Use in Testsof Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraulic Ceme
8、nts and ConcretesC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC1437 Test Method for Flow of Hydraulic Cement MortarE832 Specification for Laboratory Filter Papers3. Summary of Test Method3.1 After initial mixing is complete, the flow of the mort
9、aror plaster is determined. The mortar or plaster is then subjectedto a controlled vacuum suction for 60 s, after which the flow isagain determined. The water retention is the final flow dividedby the initial flow expressed as a percentage.4. Significance and Use4.1 This test method provides a means
10、 for determining theability of mortars and plasters to retain water under suction.Test results may be used to determine compliance withspecifications.4.2 The results obtained using this test method can be usedto compare the relative ability of mortars and plasters to retainwater under suction.4.3 Th
11、e results obtained using this test method for masonrymortars do not necessarily indicate the degree of waterretention when used with masonry units, since the amount ofwater absorbed by the unit depends on the rate of absorption ofthe masonry unit.4.4 The results obtained using this test method for p
12、lasters(stucco) do not necessarily indicate the degree of waterretention when the plaster is applied as a second coat on thesurface of a previously applied plaster base coat, since theamount of water absorbed from the second coat of plasterdepends on the rate of absorption of the base coat. This is
13、alsotrue when a plaster is applied as a coating on masonry units.5. Apparatus5.1 Tamper, conforming to Test Method C109/C109M.5.2 Straightedge, conforming to Test Method C185.1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C
14、01.22 on Workability.Current edition approved Aug. 1, 2017. Published February 2018. Originallyapproved in 2001. Last previous edition approved in 2016 as C1506 16b. DOI:10.1520/C1506-17.2Section on Safety, Manual of Cement Testing, Annual Book of ASTMStandards, Vol 04.01.3For referenced ASTM standa
15、rds, 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 this standardCopyright ASTM Internat
16、ional, 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 Principles for theDevelopment of International Standards, Gui
17、des and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.3 Flow Table, conforming to Specification C230/C230M.5.4 Mixing Apparatus, conforming to the requirements pre-scribed in Practice C305.5.5 Filter PaperThe filter paper shall be mediumretenti
18、ve, corresponding to Type 1, Class B, in accordance withSpecification E832. It shall be 150 mm in diameter.5.6 Filtration Assembly, an apparatus essentially as shownin Fig. 1 shall be used. This apparatus consists of a perforateddish resting on a funnel, which is connected by a three-waystopcock to
19、a vacuum flask, to which a controlled vacuum isapplied. The perforated dish shall be made of metal notattacked by masonry mortar or plaster (Note 1). The metal baseof the dish shall have a thickness of 2.0 6 0.3 mm and shallconform to the requirements given in Fig. 1. The stopcock boreshall have a 4
20、.0 6 0.5-mm diameter, and the connecting glasstubing shall have a minimum inside diameter of 4 mm. Thelength of the tubing projecting into the 1-L flask from thestopcock shall extend at least 25 mm below the center line ofthe vacuum connection. The contact surfaces of the funnel andperforated dish s
21、hall be plane and may need to be lapped toensure intimate contact. An airtight seal shall be maintainedbetween the funnel and the dish during the test. This shall beaccomplished by either of the following procedures. (1)Asynthetic (grease-resistant) rubber gasket permanently sealedto the top of the
22、funnel using petrolatum or light grease toprovide a seal between the gasket and dish. (2) A petroleum orlight grease coating on the top of the funnel to provide a sealbetween the funnel and dish. Take care to ensure that none ofthe holes in the perforated dish become clogged. The filterpaper shall b
23、e placed into the dish so as to completely cover theperforations in the dish.NOTE 1Stainless steel, brass, and bronze are suitable metals for thispurpose.5.7 Controlled Vacuum Source:5.7.1 A vacuum gauge capable of reading at least 9-kPapressure in 0.1-kPa increments (Note 2 and Note 3), connectedto
24、 a miniature vacuum regulator having a maximum 55-kPacapacity, which is then connected to a vacuum pump or wateraspirator as shown in Fig. 1. Connection is made between thevacuum flask and the vacuum gauge.NOTE 2Vacuum values are all given as pressure relative to atmo-spheric pressure.NOTE 3Gauges r
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