Research on Shrinkage and Softening Crack Resistance of Glass Fiber Cement Stabilized macadam
[1]GUO Yinchuan,LIU Yiwei,SHEN Aiqin,et al.Research on Shrinkage and Softening Crack Resistance of Glass Fiber Cement Stabilized macadam[J].Journal of Zhengzhou University (Engineering Science),2023,44(05):114-120.[doi:10.13705/j.issn.1671-6833.2023.02.016]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
44
Number of periods:
2023 05
Page number:
114-120
Column:
Public date:
2023-08-20
- Title:
- Research on Shrinkage and Softening Crack Resistance of Glass Fiber Cement Stabilized macadam
- Keywords:
- road engineering; cement stabilized macadam; glass fiber; shrinkage property; softening and crack resistance
- CLC:
- U414
- DOI:
- 10.13705/j.issn.1671-6833.2023.02.016
- Abstract:
- In order to reduce the generation and expansion of reflective cracks in asphalt pavements, to improve the overall crack resistance of asphalt pavements and prolong their service life, glass fibres, which were economically efficient, convenient to obtain and have good toughening effect, were used to improve the shrinkage and crack resistance of cement stabilised macadam, and the effect of glass fibres on the softening and crack resistance of cement stabilised macadam was analysed through drying shrinkage tests, temperature shrinkage tests, bending toughness tests and fracture energy tests. The results of the study showed that three different types of glass fibres were used to improve the shrinkage and cracking resistance of cement stabilised macadam. The results showed that the drying shrinkage coefficients of cement stabilized macadam with three different glass fibre doping levels decreased by 6%, 13% and 16% respectively at 30 d compared with those of ordinary cement stabilized macadam; the average temperature shrinkage coefficients decreased by 6%, 16% and 19%, respectively; the average temperature shrinkage coefficient decreased the most when the glass fibre doping level was increased from 0. 05% to 0. 10%, reaching 10%, and the best improvement effect was achieved at this time. The bending and tensile toughness of the three different glass fibre admixtures increased by 25. 9%, 48. 1% and 150. 0%, respectively; the ultimate breaking load increased by more than 20% and the deflection at breakage increased by 53% after the addition of 0. 10% glass fibre modification compared to ordinary cement stabilised macadam; the fracture energy gain ratio of cement stabilised aggregates reached 1. 225. The addition of glass fibre could effectively inhibit the drying shrinkage and temperature shrinkage deformation of cement stabilised macadam, while the modified cement stabilised macadam were much tougher and consumed much more energy at breakage than ordinary cement stabilised macadam, which was important for enhancing the shrinkage and crack resistance of cement stabilised macadam.
- References:
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Last Update:
2023-09-04