EFFLORESCENCE SUPPRESSING CEMENT AND EFFLORESCENCE SUPPRESSING MORTAR, OR EFFLORESCENCE SUPPRESSING CONCRETE

摘要

PPROBLEM TO BE SOLVED: To provide efflorescence (hereinafter, abbreviated as efflo) suppressing cement and efflo suppressing mortar or efflo suppressing concrete capable of easily suppressing efflo. PSOLUTION: The efflo suppressing cement is produced by blending ordinary portland cement (hereinafter, abbreviated as ordinary port) with a blast furnace slag fine powder, an inflating agent, a fiber reinforcing material and a porous aggregate. The main component of the material to cause efflo is calcium hydroxide contained in the ordinary port, and therefore the material to cause efflo can be reduced by reducing the ordinary port while adding the blast furnace slag fine powder of the corresponding amount. Since cracks possibly act as passages of water flow, which could increase the efflo, the cracks is reduced by adding the inflating agent to suppress the water flow. Further, adding the fiber reinforcing material prevents the cracks from widening. While the amount of calcium hydroxide is reduced by these measures, the remaining calcium hydroxide is caught in fine pores of the porous aggregate. PCOPYRIGHT: (C)2011,JPO&INPIT