CONCRETE PLACING JOINT METHOD

摘要

PROBLEM TO BE SOLVED: To exhibit strength of a placing joint between precast concrete and postcast concrete by a simple method. SOLUTION: In a concrete placing joint method in which postcast concrete C2 is placed in a placing joint part A of precast concrete C1 whose surface has cured, before curing of the precast concrete C1, coarse aggregate 4 in which the density ratio of mortar in the concrete C1 to unit voluminal mass ranges 0.80-1.25 is scattered onto the surface of the placing joint part A in a dry condition that the inside of aggregate is unsaturated to be integrally formed in the precast concrete C1 in a state that the coarse aggregate 4 is submerged by half in the placing joint part A.