Research on properties of foamed concrete reinforced with fly ash cenospheres
HU Chi
LI Hui
LIU Zhongwei
WANG Qingyuan
Abstract：Foamed concrete(500kg/m3) was prepared through a physical foaming method using fly ash cenospheres (FACs) recovered from industrial waste,ordinary Portland cement 42.5R,vegetable protein agent and fly ash as raw materials.The performance of cement paste structure as well as distribution of air voids were characterized by rheometer,SEM,XRD analyses with image software.The effect of FACs on the working capability of cement paste,compressive strength and thermal conductivity of the foamed concrete sample were also explored.Results show that the foamed concrete mixed 2.8％ of FACs could make the porosity ratio of pore distributed in less than 400 μm reached 94.94％,the average pore diameter was 174.39 μm,28 d compressive strength reached 3.38 MPa,the thermal conductivity was 0.1117 W/(m·K).The samples mixed with excess FACs (＞2.8％) increased the porosity ratio of pore (＜50 pm) and the open porosity,the compressive strength of foamed concrete mixed 3.5％ FACs at 28 d was 2.87 MPa and the thermal conductivity was 0.1079 W/(m·K).
Keywords：foamed concretefly ash cenospheresdistribution of air-voidcompressive strengththermal conductivity
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 76-80 )