掺有石灰石粉和粉煤灰作为补充胶结材料的 自密实轻质混凝土

穆罕 默德¹, 阿萨 德·¹, ²
1、巴基斯坦土木与环境工程学院
2、

摘要

本文评估了含有膨胀页岩骨料（BSA）的自密实轻质混凝土（SCLWC）的力学和结构行为。BSA是通过在
回转窑中使用天然气作为燃料，将不同大小的页岩颗粒加热到 1200℃的温度来制造的。粉煤灰（FA）和石灰石粉
（LSP）被用作补充胶结材料（LSP和 FA各替代 10%的水泥），以改善所得混凝土的性能。本实验研究的主要参数是
抗压强度、弹性模量和微观结构。新鲜状态下的性能（坍落度流动、V型隧道、J型环和 L型箱）显示，与自密实普
通重量混凝土（SCNWC）相比，SCLWC的流变行为足够好。SCLWC的抗压强度下降不多（2-4%）。轻质骨料倾
向于将混凝土行为从延展性转变为脆性，导致应变能力和弯曲韧性的降低。FA和 LSP的加入明显改善了所有龄期的
强度和微观结构。该研究对轻质混凝土的结构使用是令人鼓舞的，它可以降低整体建筑成本。

关键词

自密实；轻质混凝土；膨胀骨料；抗压强度

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