Study on the Effect of Water/Cement Ratio on the Performance of Foamed Concrete
Foamed concrete is a porous material widely used in buildings,but its performance is direct-ly affected by the internal pore structure.The property of cement slurry is an important factor affecting the stability of foam.In order to explore the influence of water/cement ratio on the performance of foamed concrete,three kinds of cement slurry with different water/cement ratio(w/c)were prepared to fabricate the foamed concrete in this paper,and their dry density,compressive strength,thermal con-ductivity and water absorption were measured to explore the relationship between their properties and w/c.The results show that as the w/c decreases,the cement content and cement slurry viscosity increase while the density of foam concrete,concrete strength,and thermal conductivity increase gradually.However,the water absorption decreases gradually.Under an appropriate w/c,the foam concrete has the largest decrease in density compared with the pure cement slurry,reaching 41.76%.The decrease of the strength is the smallest and the compressive strength reaches 9.8 MPa.The thermal conductivity decreases the most,reaching 0.212 W/m·K,and the water absorption rate reaches 21.5%.
foamed concretecompressive strengththermal conductivitywater absorptiondry density
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