期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 28, 期 1, 页码 66-71出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2011.08.025
关键词
Recycled concrete aggregate; Indirect tensile strength; Moisture sensitivity; Rutting test
资金
- National Science Council (NSC) of the Executive Yuan [NSC-96-2221-E011-113-MY3]
Recycled concrete aggregate (RCA) used for pavement construction can ease aggregate shortage problem and reduce environmental pollution. The mechanical properties of hot mix asphalt (HMA) with RCA are usually inferior to those of HMA with river crushed stone (CS). In this research, slag cement paste used for pre-coated RCA (PCRCA) with coating thickness of 0.25 mm, 0.45 mm and 0.65 mm to reinforce its ability is evaluated. The result shows that the PCRCA with coating thickness of 0.25 mm has the optimum coating paste volume for HMA mixture. The indirect tensile strength (ITS) test, moisture sensitivity test and wheel-track rutting test of HMA with substitution ratios of 25%, 50%, 75% and 100% PCRCA mixture are discussed. The results indicate that the properties of PCRCA have highly pores contents, absorption of water and asphalt contents. However, the physical properties of the PCRCA used as aggregate and test of HMA with PCRCA are within the range of the specification requirements. (C) 2011 Elsevier Ltd. All rights reserved.
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