Patent ID: 8357240
Filing Date: 2013-01-22
Classification: C04B,Y02W

Abstract:
1. A method of preparing a light weight concrete composition using expanded polymer particles comprising: a) replacing from about 10 to about 50 volume percent of the coarse aggregate in the concrete composition with prepuff particles; and b) preparing the concrete composition by combining ingredients comprising 3-40 volume percent cement, 1-50 volume percent fine aggregate having a fineness modulus of less than 4, 0-40 volume percent coarse aggregate having a fineness modulus of greater than 4, 10-22 volume percent water, and 5-40 volume percent of prepuff particles; wherein the prepuff particles have an average particle diameter of from 0.2 mm to 5 mm, a bulk density of from 0.02 g/cc to 0.56 g/cc, an aspect ratio of from 1 to 3; wherein the concrete composition has a density of from about 1.4 to about 2.1 g/cm wherein after the concrete composition is set for 28 days, has a compressive strength of at least 126 Kg/cm