| Popis: |
The Synthetic Lightweight Aggregates (SLA) is a patented aggregate composed of fly ash and high-density polyethylene (HDPE). It is considered as an eco-friendly material because its use would contribute to reduce the amount of waste going to landfills. One of most promising applications of SLA is related with the geotechnical engineering field because of its low density that when combined with natural soils may produce a composite backfill material with adequate mechanical properties. This research focuses on testing SLA material properties, including material characterization, trial mixes of SLA with natural aggregates, and compaction tests to obtain the optimum dry density. The composite soil meets the AASHTO classification standards for A-2-4 soils. The validation of the observed behavior lead to propose at least three basic applications related with natural disasters prevention: a) efficient design of retaining walls with lower lateral pressures, b) control of settlements using low density composite soils over compressible soils, and c) slope stability problems. |
