Experimental study on crack development of subgrade soil under rainfall and polymer material repair
With how fast highways are developing in China, road cracks are becoming a bigger and bigger issue. Especially when it rains, the cracks get worse and the soil gets damaged, which leads to more problems for the roads. In this paper, we look at how rainfall soaking and dry-wet cycles affect soil crac...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025011399 |
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| Summary: | With how fast highways are developing in China, road cracks are becoming a bigger and bigger issue. Especially when it rains, the cracks get worse and the soil gets damaged, which leads to more problems for the roads. In this paper, we look at how rainfall soaking and dry-wet cycles affect soil cracks in the road base through lab tests. We also talk about how well polymer materials work for fixing those cracks. The test results show that: (1) If the pavement structure is intact, water seeps in horizontally in a ring-like pattern. But when cracks are present, the water moves in a V-shape, creating a clear preferential flow. (2) The dry-wet cycles really lower the soil's compressive and shear strength, and make crack spreading worse. (3) By tweaking the polymer material formula with an orthogonal test, a solution of acrylamide and magnesium acrylate can slow down crack spreading and boost the soil's shear strength. Among these, the 10 % acrylamide solution works the best. It really slows down how fast the samples break apart and boosts their shear strength. The way polymer materials fix cracks includes: changing the physical properties of the soil around the cracks to slow down their growth, and filling in the cracks to create a water barrier that keeps the water balance on both sides. This study provides effective materials and technical support for subgrade crack repair. |
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| ISSN: | 2590-1230 |