LIGHT-WEIGHT CONCRETE PLACING JOINT TREATMENT METHOD

摘要

PROBLEM TO BE SOLVED: To ensure sufficient bonding strength in a concrete placing joint surface in a light-weight concrete for using the approximately spherical light-weight aggregate.;SOLUTION: When a concrete is placed on the light-weight concrete to joint, a setting retarder is scattered after the completion of the light-weight concrete placing, and an unsolidified mortar on the surface of the concrete is eliminated in a state of layer after a predetermined time has elapsed. The light-weight aggregate on part exposed from the surface of the concrete is chipped by a chipper to eliminate, and a coarse surface is formed on the surface of the light- weight concrete. A concrete is placed on the coarse surface to joint.;COPYRIGHT: (C)2002,JPO