Shrinkage and recovery of base material mixtures are one of the important indices for evaluating thick layer base material spraying for bio-slope-engineering.

The erosion stability of base material mixture is one of the important indices of evaluating thick layer base material spraying bioslopeengineering.

Effective moisture of base material mixture is one of the important indices evaluating thick layer base material spraying bio-slope engineering.

Fiber reinforced toughen water resistant gypsum based composites has been developed by adding mineral admixtures,polymeric admixtures and vinylon fibers to β-gypsum hemihydrate.

The corrosion resistance coefficient (flexural strength ratio) of cement mortars incorporating different mineral admixtures was tested according to GB2420, and the ASTM C1012 method was employed to measure the expansion ratio of mortar bars after 15 weeks of immersion in 5% Na_2SO_4 solution.

The function of substrate relies on the effects of functional materials under condition of limited substance.

The results show:(1) the germination rate,late growth height and the maximal contraction rate decrease with spraying press increasing,while increasing with supply water increasing;(2) shearing resistance and resilience rate of substrate increase with spray press increasing,while decreasing with water supply increasing;and(3) spray press,water supply and soil texture are not no.