METHOD FOR PREPARING COMPOSITION OF LIGHT FOAMED CONCRETE TO IMPROVE CRACK RESISTANCE, QUALITY UNIFORMITY, HEAT INSULATION AND SOUND DAMPING PROPERTY

摘要

PURPOSE: A method for preparing a composition of light foamed concrete is provided to improve crack resistance, quality uniformity, heat insulation and sound damping property, and to help to further prevent cracks on the finished layer. CONSTITUTION: The method for preparing a composition of light foamed concrete which is placed on the heat insulation material or the interlayer sound damping material on the slab floor, comprises: charging 320-400kg of Portland cement, 360-450L of chips of a foamed ethylene-vinyl-acetate(EVA) resin, 1.5-2.0kg of a special admixture, based on 1m¬3 of the composition, into a blender and adding 160-240L of purified water to prepare a first mixture; preparing 32.8-76.5L of diluted foaming water by mixing 0.8-1.5L of a foaming agent with 32-75L of purified water; introducing the diluted foaming water into a pipe positioned vertical to the foaming device through a sprayer under pressure of 2-3kgcm¬2; applying compressed air with the pressure of 7kg/cm¬2 or more to the pipe to generate foam; adding the foamed water into the first mixture and stirring them at 55-60rpm for 1-2minutes.