1、Standard Method of Test for Sampling Bituminous Paving Mixtures AASHTO Designation: T 168-03 (2011) ASTM Designation: D979-01(2006)1 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-2c T 168-1 AASHTO Standard Method
2、 of Test for Sampling Bituminous Paving Mixtures AASHTO Designation: T 168-03 (2011) ASTM Designation: D979-01(2006)1AASHTO T 168-03 (2011) is identical to ASTM D979-01 (2006)1except for the following provisions: 1. All references to the ASTM standards listed in the following table shall be replaced
3、 with the corresponding AASHTO standard: Referenced Standard ASTM AASHTO C702 T 248 2. Insert an additional section between Sections 4.1.1 and 4.1.2 containing the following: Care shall be taken in sampling to avoid segregation of coarse aggregate and asphalt mortar. Care shall be taken also to prev
4、ent contamination by dust or other foreign matter. 3. Insert new Sections 5.2.3.3, 5.2.3.4, and 5.2.3.5 after Section 5.2.3.2 as follows: 5.2.3.3. If the mixture is in a windrow (cold mix), random samples of the windrow at intervals of not more than 150 m (500 ft) shall be secured and tested separat
5、ely. Samples of the windrow shall be secured by flattening it at one point into a layer approximately 0.3 m (1 ft) thick and coring this layer at three or more random points to obtain the required sample size as shown in Table 1. 5.2.3.4. If the mix has been bladed into a relatively uniform layer, s
6、amples shall be secured at intervals of not more than 150 m (500 ft). 5.2.3.5. Samples from a stockpile shall be obtained by combining equal quantities of the mixture taken from holes dug into points near the top, middle, and bottom of the stockpile. Reduction of the sample to the required size shall be as described in Section 5.3.2. 4. Insert an additional section between Sections 6.2.3 and 6.2.4 containing the following: Lot number. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
