Designation: c 157/C 157M – 08 Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete 1
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- Điều hướng trang này:
- 3. Terminology
- 4. Significance and Use
| 2. Referenced Documents
2.1 ASTM Standards: 2 C 125 Terminology Relating to Concrete and Concrete Aggregates C 143/C 143M Test Method for Slump of Hydraulic- Cement Concrete C 172 Practice for Sampling Freshly Mixed Concrete C 192/C 192M Practice for Making and Curing Concrete Test Specimens in the Laboratory C 305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency C 490 Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete C 511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes C 596 Test Method for Drying Shrinkage of Mortar Con- taining Hydraulic Cement C 1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis E 11 Specification for Wire Cloth and Sieves for Testing Purposes E 337 Test Method for Measuring Humidity with a Psy- chrometer (the Measurement of Wet- and Dry-Bulb Tem- peratures) 3. Terminology 3.1 Definitions—The terms used in this test method are defined in Terminology C 125 . 3.2 Definitions of Terms Specific to This Standard: 3.2.1 length change, n—an increase or decrease in the length of a test specimen that has been caused to change by any factor other than externally applied forces and temperature changes. 4. Significance and Use 4.1 Measurement of length change permits assessment of the potential for volumetric expansion or contraction of mortar or concrete due to various causes other than applied force or temperature change. This test method is particularly useful for comparative evaluation of this potential in different hydraulic- cement mortar or concrete mixtures. 4.2 This test method provides useful information for experi- mental purposes or for products that require testing under nonstandard mixing, placing, handling, or curing conditions, such as high product workability or different demolding times. Standard conditions are described in 5.4.1 . 4.3 If conditions for mixing, curing, sampling, and storage other than specified in this test method are required, they shall be reported but are not to be considered as standard conditions 1 This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.68 on Volume Change. Current edition approved Oct. 1, 2008. Published November 2008. Originally approved in 1940. Last previous edition approved in 2006 as C 157/C 157M – 06. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website. 1 tải về 128.58 Kb. Chia sẻ với bạn bè của bạn:
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