ASTM C1506-2016b Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters《液压水泥基砂浆和灰泥的保水性的标准试验方法》.pdf
《ASTM C1506-2016b Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters《液压水泥基砂浆和灰泥的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 C1506-2016b Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters《液压水泥基砂浆和灰泥的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 16aC1506 16bStandard 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 yea
2、r 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 test method provides for the determination of water retention of hydraulic cement-based mortars and plaster
3、s.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.When this test method refers to combined-unit standards, the selection of the measurement systems is at the users discretion.1.3 This standard does not purport to address a
4、ll of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. (WarningFresh hydraulic cementitious mixtures are caustic and m
5、ay cause chemical burns to skin andtissue upon prolonged exposure.)22. Referenced Documents2.1 ASTM Standards:3C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)C185 Test Method for Air Content of Hydraulic Cement MortarC230/C230M Specif
6、ication for Flow Table for Use in Tests of Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic ConsistencyC511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of HydraulicCements and ConcretesC
7、670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsC1437 Test Method for Flow of Hydraulic Cement Mortar3. Summary of Test Method3.1 After initial mixing is complete, the flow of the mortar or plaster is determined. The mortar or plaster is then subje
8、cted toa controlled vacuum suction for 60 s, after which the flow is again determined. The water retention is the final flow divided bythe initial flow expressed as a percentage.4. Significance and Use4.1 This test method provides a means for determining the ability of mortars and plasters to retain
9、 water under suction. Testresults may be used to determine compliance with specifications.4.2 The results obtained using this test method can be used to compare the relative ability of mortars and plasters to retain waterunder suction.4.3 The results obtained using this test method for masonry morta
10、rs do not necessarily indicate the degree of water retentionwhen used with masonry units, since the amount of water absorbed by the unit depends on the rate of absorption of the masonryunit.1 This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility
11、of Subcommittee C01.22 on Workability.Current edition approved Feb. 15, 2016Dec. 1, 2016. Published February 2016December 2016. Originally approved in 2001. Last previous edition approved in 2016 asC1506 16.C1506 16a. DOI: 10.1520/C1506-16A.10.1520/C1506-16B.2 Section on Safety, Manual of Cement Tes
12、ting, Annual Book of ASTM Standards, Vol 04.01.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document
13、is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appro
14、priate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United Stat
15、es14.4 The results obtained using this test method for plasters (stucco) do not necessarily indicate the degree of water retentionwhen the plaster is applied as a second coat on the surface of a previously applied plaster base coat, since the amount of waterabsorbed from the second coat of plaster d
16、epends on the rate of absorption of the base coat. This is also true when a plaster isapplied as a coating on masonry units.5. Apparatus5.1 Tamper, conforming to Test Method C109/C109M.5.2 Straightedge, conforming to Test Method C185.5.3 Flow Table, conforming to Specification C230/C230M.5.4 Mixing
17、Apparatus, conforming to the requirements prescribed in Practice C305.5.5 Filtration Assembly, an apparatus essentially as shown in Fig. 1 shall be used. This apparatus consists of a perforated dishresting on a funnel, which is connected by a three-way stopcock to a vacuum flask, to which a controll
18、ed vacuum is applied. Theperforated dish shall be made of metal not attacked by masonry mortar or plaster (Note 1). The metal base of the dish shall havea thickness of 2.0 6 0.3 mm and shall conform to the requirements given in Fig. 1. The stopcock bore shall have a 4.0 6 0.5-mmdiameter, and the con
19、necting glass tubing shall have a minimum inside diameter of 4 mm. The length of the tubing projecting intothe 1-L flask from the stopcock shall extend at least 25 mm below the center line of the vacuum connection. The contact surfacesof the funnel and perforated dish shall be plane and may need to
20、be lapped to ensure intimate contact. An airtight seal shall bemaintained between the funnel and the dish during the test. This shall be accomplished by either of the following procedures. (1)A synthetic (grease-resistant) rubber gasket may be permanently sealed to the top of the funnel using petrol
21、atum or light greaseto ensure a seal between the gasket and dish. (2) The top of the funnel may be lightly coated with petroleum or light grease toensure a seal between the funnel and dish. Care shall be taken to ensure that none of the holes in the perforated dish becomeclogged. Hardened, smooth, n
22、ot rapid filter paper shall be used. It shall be 150 mm in diameter and be placed so as to completelycover the perforations in the dish.NOTE 1Stainless steel, brass, and bronze are suitable metals for this purpose.5.6 Controlled Vacuum Source:5.6.1 A vacuum gage capable of reading at least 9-kPa pre
23、ssure in 0.1-kPa increments (Note 2 and Note 3), connected to aminiature vacuum regulator having a maximum 55-kPa capacity, which is then connected to a vacuum pump or water aspiratoras shown in Fig. 1. Connection is made between the vacuum flask and the vacuum gage.NOTE 2Vacuum values are all given
24、 as pressure relative to atmospheric pressure.NOTE 3Gages reading pressure in other units are acceptable as long as their capacity and scale increments comply with the levels specified here. (Forexample, a vacuum gage with a minimum capacity of 70 mm of Hg in 1-mm increments is acceptable. To conver
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