LIGHT WEIGHT CONCRETE COMPOSITION AND LIGHT WEIGHT CONCRETE HARDENED BODY

摘要

PROBLEM TO BE SOLVED: To ensure flowability and material separation resistance at the pump pressure feeding of a light weight concrete. SOLUTION: In a concrete formulation, 550-750 kg/m<3> fine powder content having <=0.3 mm particle size is contained per unit volume of the concrete. The slump flow value of the concrete at the end of kneading is kept in >=500 mm. The specific gravity difference between the mass (mortar specific gravity) per unit volume of mortar constituting the concrete and the bone dry specific gravity of an artificial light weight aggregate is kept in <=1.20.