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A platform for research: civil engineering, architecture and urbanism
Silty soil resilient modulus stabilised with cement and recycled aggregate
The present study analysed the resilient behaviour of silty soils from the southern region of Brazil stabilised with cement and recycled aggregate (RA) from construction and demolition waste, with a maximum diameter of 4.8 mm. Its suitability for use in urban pavement layers has also been assessed. Cyclic triaxial tests were conducted on pure soil, soil-cement, and soil-cement-RA specimens under three compaction efforts: standard, intermediate, and modified. Based on the results of the cyclic triaxial tests, resilience modulus (MR) prediction models were calibrated. Subsequently, using the AEMC software, the useful life of an urban pavement was evaluated, considering the materials tested as base layers and subbase. The results indicate that incorporating cement and RA proved effective in stabilising the soil, significantly improving the resilient modulus compared to pure soil. When compacted at the modified energy and subjected to the highest stress levels, the soil-cement-RA mixture presented MR of 638 MPa, an increase of 50% compared with the soil-cement mixture, with MR of 426 MPa. The mechanistic analysis demonstrated that soil-cement and soil-cement-RA mixtures are suitable for use in base layers and subbase of urban pavements, with the soil-cement-RA mixture presenting better performance as a base material.
Silty soil resilient modulus stabilised with cement and recycled aggregate
The present study analysed the resilient behaviour of silty soils from the southern region of Brazil stabilised with cement and recycled aggregate (RA) from construction and demolition waste, with a maximum diameter of 4.8 mm. Its suitability for use in urban pavement layers has also been assessed. Cyclic triaxial tests were conducted on pure soil, soil-cement, and soil-cement-RA specimens under three compaction efforts: standard, intermediate, and modified. Based on the results of the cyclic triaxial tests, resilience modulus (MR) prediction models were calibrated. Subsequently, using the AEMC software, the useful life of an urban pavement was evaluated, considering the materials tested as base layers and subbase. The results indicate that incorporating cement and RA proved effective in stabilising the soil, significantly improving the resilient modulus compared to pure soil. When compacted at the modified energy and subjected to the highest stress levels, the soil-cement-RA mixture presented MR of 638 MPa, an increase of 50% compared with the soil-cement mixture, with MR of 426 MPa. The mechanistic analysis demonstrated that soil-cement and soil-cement-RA mixtures are suitable for use in base layers and subbase of urban pavements, with the soil-cement-RA mixture presenting better performance as a base material.
Silty soil resilient modulus stabilised with cement and recycled aggregate
Orioli, Monigleicia Alcalde (author) / Costa, Weiner Gustavo Silva (author) / Baldin, Claudia Regina Bernardi (author) / Muñoz, Yeimy Ordoñez (author) / Izzo, Ronaldo Luis dos Santos (author)
2024-12-31
Article (Journal)
Electronic Resource
English
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