抄録
Physical properties on direct electric curring concrete are investigated. In this paper, kind of aggregate, kind of cement, the unit water volume, the sand-aggregate ratio, the quantity of cement, current, precurring time, and age which affect it were discussed. Each factor have 2〜4 levels. In extablishing the Experimental Plan, an orthonogonal table of type L_<32> (2^1+4^9) are apportioned. Rational specification was obtained by experimental result. Significant primary factor about compressive strength are age, kind of aggregate, kind of cement, and the quantity of cement. The method of fructural modulus is affected by age. The primary factors affect temperature of concrete are current and the unit water volume. Consumption of electric power were affected by current and precurring time. So rational specification was obtained by crush stone, blast-furnace cement and the unit of water volume 170l/m^3. Current is 4A (0.0005A/(cm)^2), sending time of current if 2 hours and precurring time is 1/2 hours. Sand-aggregate ratio and volume of cement are free.
