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Successful Application of CLSM on a Weak Pavement Base/Subgrade for Heavy Truck Traffic |
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| Authors: | Deng-Fong Lin Huan-Lin Luo He-Yuan Wang Ming-Jui Hung |
| Affiliation: | 1Professor, Dept. of Civil and Ecological Engineering, I-Shou Univ., 1, Section 1, Hsueh-Cheng Rd., Ta-Hsu Hsiang, Kaohsiung County, Taiwan 84008, R.O.C. 2Associate Professor, Dept. of Civil Engineering, National Kaohsiung Univ. of Applied Sciences, 415 Chien Kung Rd., Kaohsiung, Taiwan 80778, R.O.C. 3Assistant Professor, Dept. of Environmental and Saftey Engineering, Mingchi University of Technology, 84 Gungjuan Rd., Taishan, Taipei, Taiwan, 243, R.O.C. |
| Abstract: | Lack of proper pavement base and subgrade compaction leads to premature failures that account for millions of dollars in damages. Controlled low-strength material (CLSM) concrete was introduced in this study as pavement base material near a manhole where proper compaction is unachievable. Rut-resistant stone matrix asphalt was placed on top of the CLSM as a wearing surface layer. Dynamic cone penetrometer (DCP) testing was used to monitor CLSM construction. One day after placing, the CLSM gained sufficient strength to support construction traffic. Further, DCP results indicated that the CLSM possessed uniform characteristics of concrete that could improve the load-bearing capacity and serviceability of the pavement near the manhole. After 18 months of heavy truck traffic, maximum rutting was 5?mm, well below the failure criteria of 12.5?mm. Based on cost and performance, CLSM concrete has the potential to improve problematic areas in pavement. |
| Keywords: | California bearing ratio Compression strength Concrete pavements Subgrades Trucks |