Phương pháp thử tiêu chuẩn về độ sệt chuẩn của xi măng đông trong nước | DeS 9nat On C 187-98 American Association State Highway and Transportation Officials Standard AASHTO No. T 129 Standard Test Method for Normal Consistency of Hydraulic Cement1 This standard is issued under the fixed designation C 187 the numbee iimm hat l following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 1. Scope This test method covers the determination of the normal consistency of hydraulic cement. The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. This standard does not purport to address all of the safety concerns if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents ASTM Standards C 305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency2 C 490 Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste Mortar and Concrete2 C 1005 Specification for Weights and Weiglung Devices for Use in the Physical Testing of Hydraulic Cements2 D 1193 Specification Tor Reagent Wtrn e 3 E 177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods4 3. Significance and Use This test method is intended to be used to determine the amount of water required to prepare hydraulic cement pastes for testing. 4. Apparatus Weights and Weighing Devices The weights and weighing devices shall conform to the requirements of Speci-fcation C 1005. The weighing device shall be evaluated for precision and accuracy at a total load of 1000 g. Glass Graduates 200 or 250-mL capacity and conforming to the .
