Abstract：For the problems of poor workability and insufficient durability of dry-mixed morter used in the exterior insulation system, the paper made a thorough inquiry about the variation of the influence that content of subdivisible sporadic lactoprene powder makes on the dry-mixed mortar workability, mechanical properties and durability.The further analysis of the mechanism of subdivisible sporadic lactoprene powder properties of dry-mixed morter by mears of SEM test, which provide reliable experimental data for farther studies of the performance of polymer modified dry-mixed morter.

Keyword：subdivisible sporadic lactoprene powder;dry-mixed mortar;exterior insulation;