全轻页岩陶粒现浇泡沫混凝土的试验研究

发布时间：2018-03-27 09:05

本文选题：现浇泡沫混凝土　切入点：自密实混凝土　出处：《工业建筑》2017年02期

【摘要】：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。
[Abstract]:The physical and mechanical properties of traditional foamed concrete are greatly different due to the wide range of raw material sources and the limitation of mix ratio, especially when cast-in-situ vertical mold. The inevitable crack problem is the key to the engineering application of the lightweight material. Using shale pottery sand or shale ceramsite as aggregate, a new type of foamed concrete is prepared by physical foaming method, which has no delamination and no cracking. The remarkable characteristic of high strength is proved by engineering application. The influence factors such as strength, dry apparent density and thermal conductivity of full light shale ceramsite foamed concrete are tested. The results show that proper amount of crushed shale ceramsite is added into it. The influence of water / binder ratio and foaming time on foamed concrete is mutual, but foaming time is more significant, the influence law of excess fly ash content and sand / binder ratio on foam concrete is similar, but there is an optimum value. The thermal conductivity is inversely proportional to the strength grade and density, but the influencing factors are more complicated.
【作者单位】：河南理工大学生态建筑与环境构建河南省工程实验室;河南理工大学土木工程学院;河南省建设集团有限公司;
【基金】：国家自然科学基金资助项目(41172317)
【分类号】：TU528.2

【相似文献】