1、Standard Method of Test for Compressive Strength of Hydraulic Cement Mortar (Using 50-mm or 2-in. Cube Specimens) AASHTO Designation: T 106M/T 106-15 ASTM Designation: C109/C109M-13 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington
2、, D.C. 20001 TS-3a T 106M/T 106-1 AASHTO Standard Method of Test for Compressive Strength of Hydraulic Cement Mortar (Using 50-mm or 2-in. Cube Specimens) AASHTO Designation: T 106M/T 106-15 ASTM Designation: C109/C109M-13 1. SCOPE 1.1. This test method covers determination of the compressive streng
3、th of hydraulic cement mortar using 50-mm (or 2-in.) cube specimens (see Note 1). Note 1ASTM C349 provides an alternative procedure for this determination (not to be used for acceptance tests). 1.2. This test method covers the application of the test using either inch-pound or SI units. The values s
4、tated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from t
5、he two systems may result in nonconformance with the standard. 1.3. Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversion and Rebounding given in Standard IEEE/ASTM SI 10, of measurements made in other units. 1.4. This standard d
6、oes 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. WarningFresh hydraulic cementitio
7、us mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 85, Portland Cement M 152M/M 152, Flow Table for Use in Tests of Hydraulic Cement M 201, Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tank
8、s Used in the Testing of Hydraulic Cements and Concretes M 240M/M 240, Blended Hydraulic Cement M 295, Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete M 302, Slag Cement for Use in Concrete and Mortars T 105, Chemical Analysis of Hydraulic Cement T 162, Mechanical Mixing of Hyd
9、raulic Cement Pastes and Mortars of Plastic Consistency 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-3a T 106M/T 106-2 AASHTO 2.2. ASTM Standards: C91/C91M, Standard Specification for Masonry Cemen
10、t C349, Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure) C670, Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials C778, Standard Specification for Standard Sand C1005, Standar
11、d Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing of Hydraulic Cements C1157/C1157M, Standard Performance Specification for Hydraulic Cement C1328/C1328M, Standard Specification for Plastic (Stucco) Cement C1329/C1329M, Standard Specific
12、ation for Mortar Cement 2.3. IEEE/ASTM Standard: SI 10, American National Standard for Metric Practice 3. SUMMARY OF TEST METHOD 3.1. The mortar used consists of one part cement and 2.75 parts of sand proportioned by mass. Portland or air-entraining portland cements are mixed at specified water-ceme
13、nt ratios. Water content for other cements is that sufficient to obtain a flow of 110 5 in 25 drops of the flow table. Fifty- millimeter or 2-in. test cubes are compacted by tamping in two layers. The cubes are cured 24 h in the molds, and stripped and immersed in lime water until tested. 4. SIGNIFI
14、CANCE AND USE 4.1. This test method provides a means of determining the compressive strength of hydraulic cement and other mortars, and results may be used to determine compliance with specifications. Further, this test method is referenced by numerous other specifications and test methods. Caution
15、must be exercised in using the results of this test method to predict the strength of concretes. 5. APPARATUS 5.1. Weights and Weighing DevicesShall conform to the requirements of ASTM C1005. The weighing device shall be evaluated for precision and accuracy at a total load of 2000 g. 5.2. Glass Grad
16、uatesOf suitable capacities (preferably large enough to measure the mixing water in a single operation) to deliver the indicated volume at 20C. The permissible variation shall be 2 mL. These graduates shall be subdivided to at least 5 mL, except that the graduation lines may be omitted for the lowes
17、t 10 mL for a 250-mL graduate and for the lowest 25 mL for a 500-mL graduate. The main graduation lines shall be circles and shall be numbered. The least graduations shall extend at least one-seventh of the way around, and intermediate graduations shall extend at least one-fifth of the way around. 5
18、.3. Specimen MoldsFor the 50-mm or 2-in. cube specimens shall be tight fitting. The molds shall have no more than three cube compartments and shall be separable into no more than two parts. The parts of the molds when assembled shall be positively held together. The molds shall be made of hard metal
19、 not attacked by the cement mortar. For new molds, the Rockwell hardness number of the metal shall be not less than 55 HRB. The sides of the molds shall be sufficiently rigid to 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a viola
20、tion of applicable law.TS-3a T 106M/T 106-3 AASHTO prevent spreading or warping. The interior faces of the molds shall be plane surfaces and shall conform to the tolerances of Table 1. Table 1Permissible Variations of Specimen Molds Parameter 50-mm Cube Molds 2-in. Cube Molds New In Use New In Use P
21、laneness of sides ,1,1)” or equivalent, or use statistical tables to find the confidence in a one-tailed, paired-value t-test on the set of round errors. Note A1The qualification method fails for bias if (1) the MRErexceeds the MARErpercentage limit, or if (2) the GRE percentage exceeds the MGREglimit and the CL percentage exceeds 95 percent. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
