Journal of Hebei University of Engineering
1673-9469
2024
41
2
1
6
10.3969/j.issn.1673-9469.2024.02.001
article
水灰比对泡沫混凝土性能的影响研究
Study on the Effect of Water/Cement Ratio on the Performance of Foamed Concrete
泡沫混凝土作为一种多孔材料被广泛应用于建筑中,其性能直接受内部气孔结构的影响,而水泥浆的性质是影响泡沫稳定存在的重要因素。为探究水灰比对泡沫混凝土性能的影响,该文配制了三种不同水灰比的水泥浆制备泡沫混凝土,并测量其干密度、抗压强度、导热率和吸水率,探究其性能与水灰比的关系。结果表明,随着水灰比减小,水泥含量增加,水泥粘度增加,泡沫混凝土密度逐渐增加,强度逐渐增加,导热率逐渐增大,吸水率逐渐减小。在合适的水灰比下,泡沫混凝土相比纯水泥浆密度降幅最大,达到41.76%;强度降幅最小,抗压强度达到9.8 MPa;导热率降幅达到最大,为0.212 W/m·K;吸水率达到21.5%。
Foamed concrete is a porous material widely used in buildings, but its performance is directly 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 conductivity 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%.
泡沫混凝土;抗压强度;导热率;吸水率;干密度
foamed concrete;compressive strength;thermal conductivity;water absorption;dry density
丰土根,杨航,张箭
FENG Tugen, YANG Hang, ZHANG Jian
natural/article/abstract/20240201