The stability and durability of silt-based foamed concrete: A new type of road engineering material

This paper implements four types of tests under three designed wet densities, including drying-wetting cycles test, freeze-thaw cycle test, water stability test, and dry shrinkage test, to analyze the strength change law of silt-based foamed concrete after a specified age or a number of cycles. Test results showed that compressive strength of silt-based foamed concrete was not adversely affected by external environment during 90 days' saturation period. Phenomenon of dry and shrinkage for silt-based foamed concrete mainly occurred at the first 7 days and tended to be stable within a month, the subsequent dry shrinkage phenomenon was not significant. After 50 times of drying-wetting cycles, the loss rate of foamed concrete became small. Specimens presented great per-formance of drying-wetting cycles. After 30 times of freeze-thaw cycles, the compressive strength, splitting and tensile strength of foamed concrete decreased slightly. Specimens presented good performance of freeze-thaw cycles. Therefore, the stability and durability of silt-based foamed concrete are considered great and meet the needs of road engineering construction.

Automated summary

This study analyzed the strength change law of silt-based foamed concrete through various tests, showing that its stability and durability are considered great and meet the needs of road engineering construction.