Among which the experiment group using 50% fly ash, 10% silica fume instead of ordinary Portland cement shows rather better durability either in standard curing or the accelerated aging experiment.

The curing condition, the maximum size of coarse aggregate and silica fume have certain effects on the strength, fracture properties and brittleness of concrete.

The results suggest that nanometer silica fume can greatly improve the unconfined compression strength of cemented soil at various curing periods.