Expansive cement type bond null for lightweight aerated concrete board

摘要

PROBLEM TO BE SOLVED: To provide joint filler preventing the occurrence of gap at the interface between autoclaved lightweight cellular concrete (ALC) and the joint filler under a condition that a joint filler injection surface treatment is carried out once as the conventional, reducing combined stress of the dry shrinkage of the ALC and the change of length of the joint filler while making the best use of stiffness and the sound insulation maximum performance of the ALC to prevent the occurrence of the gap over a long period and to keep existing working period in the floor board construction using the ALC board.;SOLUTION: An expanding agent, a foaming enhancer and a water-soluble resin and further gypsum are added by a specific quantity to conventional joint filler comprising aggregate, cement, water holding agent and water.;COPYRIGHT: (C)2008,JPO&INPIT