以废大理石粉为填料的浆液渗透纤维混凝土的性能

Dawit Beza
埃塞俄比亚

摘要

在发展中国家的建筑业中，传统建筑材料和传统建筑技术的使用使建筑成本高昂，对环境有害，因此
在我们的建筑业使用替代建筑材料和建筑技术非常重要。本文研究了以废大理石粉为填料的浆液渗透纤维混凝
土的性能。泥浆渗透纤维混凝土是一种特殊类型的钢纤维混凝土（SFC），具有高体积分数的纤维，它具有高
延性和高机械性能，特别适用于建筑结构构件的泥浆渗透纤维混凝土层压材料。对于普通混凝土，它可将混凝
土结构构件的强度提高 25%，对于纤维增强混凝土，可提高 40% 用于建筑物混凝土结构构件弱化的补救工程。
这种类型的混凝土使用由非常细的颗粒或填料组成的基质，以增强其纤维互锁性能。本文的目的是研究用大理
石废料作为细填料用于浆体渗透纤维混凝土生产的可能性。根据先前的研究，在混凝土生产中使用大理石废料
粉末填料将可流动混凝土的性能提高到一定限度，因此，为此目的，通过添加不同剂量的大理石废粉（0%、
10%、20%、30%、40%）（按重量计）制备了四种不同类型的混凝土。为了研究泥浆渗透纤维混凝土的性能，
共制备了 18 个样品，其中添加了不同附加范围（0%、10%、20%、30%、40%）的废大理石粉末，用于每个替
换 C-30，进行混凝土的拉伸和弯曲强度以及 UPV 试验，以检查样品的孔隙率。结果表明，成分（水泥、沙子）
的量减少了 10%，因为新鲜体积增加了 15%。最后进行 XRD 观察样品的微观结构。在泥浆渗透纤维混凝土中
使用废大理石粉末作为细填料将稠度和可加工性提高到 30%，抗弯强度显示出提高了 30% 的使用率，最佳使
用率比这个百分比高 30%。

关键词

细填料；废大理石粉尘；抗压强度；抗弯强度和抗拉强度

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