塑钢纤维磷渣混凝土弯曲性能研究

摘要/Abstract

摘要： 以不掺塑钢纤维的磷渣混凝土为基准,对纤维长度为30 mm、40 mm、55 mm和纤维掺量为3 kg/m³、6 kg/m³、9 kg/m³的塑钢纤维磷渣混凝土进行四点弯曲试验,研究不同纤维长度和纤维掺量对磷渣混凝土弯曲性能的影响规律。研究结果表明:随着塑钢纤维长度和掺量的增加,磷渣混凝土的抗弯强度随之增加,塑钢纤维长度为55 mm,掺量为3 kg/m³时,对磷渣混凝土抗弯强度增强效果最佳,抗弯强度比基准组提高了56%;随着塑钢纤维长度和掺量的增加,磷渣混凝土弯曲韧性指数不断增大,弯曲韧性不断提高,塑钢纤维长度为55 mm,掺量为9 kg/m³时,弯曲韧性指数I₂₀比基准组提高了9.8倍。

关键词: 塑钢纤维, 磷渣混凝土, 弯曲性能, 弯曲韧性, 弯曲韧性指数, 四点弯曲

Abstract: Phosphorus slag concrete without plastic steel fiber was used as the reference. Taking plastic steel fiber as the research object, four-point bending tests were carried out on plastic steel fiber phosphorus slag concrete with fiber length of 30 mm, 40 mm, 55 mm and fiber content of 3 kg/m³, 6 kg/m³ and 9 kg/m³ to study the influences of different fiber length and fiber content on the bending properties of phosphorus slag concrete. The results show that the bending strength of phosphorus slag concrete increases with the increase of the length and content of plastic steel fiber. When the length of plastic steel fiber is 55 mm and the content of plastic steel fiber is 3 kg/m³, the bending strength of phosphorus slag concrete is the best, and the bending strength is 56% higher than that of the reference group.With the increase of length and content of plastic steel fiber, the bending toughness index and bending toughness of phosphorus slag concrete increase continuously. When the length of plastic steel fiber is 55 mm and the content of plastic steel fiber is 9 kg/m³, the bending toughness index I₂₀ is 9.8 times higher than that of the reference group.

Key words: plastic steel fiber, phosphorus slag concrete, bending strength, bending toughness, bending toughness index, four-point bending

中图分类号:

TU528

杨壮, 邓建华, 昝彩平, 杜凯, 代旭东. 塑钢纤维磷渣混凝土弯曲性能研究[J]. 硅酸盐通报, 2022, 41(1): 218-225.

YANG Zhuang, DENG Jianhua, ZAN Caiping, DU Kai, DAI Xudong. Bending Property of Plastic Steel Fiber Phosphorus Slag Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(1): 218-225.

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