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传统泡沫混凝土因原材料来源的广泛性和配合比限制,导致其物理力学性能差异较大,尤其是立模现浇时,其无法避免的裂缝问题是制约该轻质材料工程应用的关键。采用页岩陶砂或和页岩陶粒为集料,通过物理发泡方法配制出新型泡沫混凝土,具有不分层、不开裂、强度高的显著特征,并通过工程应用得到证明。通过对全轻页岩陶粒泡沫混凝土的强度、干表观密度和导热系数等影响因素进行试验,结果表明:掺入适量的碎石型页岩陶粒,可有效提高强度;水胶比和发泡时间对泡沫混凝土的影响是相互的,但发泡时间影响更大;超量粉煤灰掺量和砂胶比对泡沫混凝土的影响规律相似,但都有一个最佳值;导热系数与强度等级和密度呈反比关系,但影响因素更为复杂。
Due to the wide range of raw material sources and the limitations of the blending ratio, the traditional foam concrete causes great differences in its physical and mechanical properties. Especially when cast-in-situ, the unavoidable crack problem is the key to restrict the application of the lightweight material engineering. Using shale ceramsite and shale ceramsite as aggregates, a new type of foamed concrete was prepared by physical foaming method. It has the characteristics of non-delamination, non-cracking and high strength, and is proved by engineering application. Through the experiment on the influence factors such as strength, dry apparent density and thermal conductivity of ceramsite foam concrete, the results show that: the appropriate amount of gravel shale ceramsite can effectively improve the strength; water-cement ratio and The influence of foaming time on foamed concrete is mutual, but the influence of foaming time is greater. The effect of excess amount of fly ash and mortar to foamed concrete are similar, but both have an optimum value. The coefficient of thermal conductivity Intensity levels and density are inversely proportional, but the influencing factors are more complicated.