玄武岩纤维对粉煤灰混凝土的力学性能影响分析

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英文篇名：Impact Analysis of Basalt Fiber on Mechanical Properties of Fly Ash Concrete 作者：张莉 ; 来永攀 英文作者：Zhang Li;Lai Yongpan;Shaanxi Energy Institute;China United Northwest Institute for Engineering Design & Resarch Co.,Ltd; 关键词：玄武岩纤维 ; 粉煤灰混凝土 ; 抗压强度 ; 劈裂抗拉强度 ; 抗折强度 英文关键词：basalt fiber;;fly ash concrete;;compressive strength;;splitting tensile strength;;flexural strength 中文刊名：FMLE 英文刊名：Fly Ash Comprehensive Utilization 机构：陕西能源职业技术学院;中联西北工程设计院有限公司; 出版日期：2019-04-25 出版单位：粉煤灰综合利用 年：2019 期：No.174 语种：中文; 页：FMLE201902016 页数：4 CN：02 ISSN：13-1187/TU 分类号：55-58

摘要

玄武岩纤维粉煤灰混凝土作为一种新型改性混凝土材料,具有良好的工作和使用性能。为研究玄武岩纤维对粉煤灰混凝土力学性能的影响,对不同玄武岩纤维体积率与粉煤灰掺量条件下玄武岩纤维粉煤灰混凝土的坍落度、抗压强度、抗拉强度以及抗折强度进行了研究,结果如下:(1)玄武岩纤维粉煤灰混凝土的坍落度与玄武岩纤维体积率呈指数递减关系,当玄武岩纤维体积率大于0.15%时,增大粉煤灰掺量对玄武岩纤维混凝土坍落度影响不大。(2)当玄武岩纤维体积率小于0.15%时,粉煤灰的加入能够明显提高混凝土的抗压强度,且其掺量在12%～18%时,玄武岩纤维混凝土抗压强度最高,约为普通混凝土的115%～120%。(3)随着玄武岩纤维体积率和粉煤灰掺量的增大,混凝土的劈裂抗拉和抗折强度出现了先增大后减小的变化规律;当粉煤灰掺量在12%～18%、玄武岩纤维体积率在0.1%～0.15%时,玄武岩纤维混凝土的劈裂抗拉以及抗折性能最好。
        Basalt fiber fly ash concrete is a new type of modified concrete material with good work and service performance. In order to study the effect of basalt fiber on the mechanical properties of fly ash concrete, the slump, compressive strength, tensile strength and flexural strength of basalt fiber fly ash concrete was carried out under the different basalt fiber volume ratio and fly ash content. The following results were obtained:(1) The slump of basalt fiber fly ash concrete is exponentially decreasing with the volume fraction of basalt fiber. When the volume fraction of basalt fiber is more than 0.15 %, increasing the amount of fly ash has little effect on the slump of basalt fiber concrete.(2) When the volume fraction of basalt fiber is less than 0.15 %, the addition of fly ash can significantly improve the compressive strength of concrete, and when the content is between 12 % and 18 %, the compressive strength of basalt fiber concrete is the highest, about 115 %-120 % of ordinary concrete.(3) With the increase of basalt fiber volume fraction and fly ash content, the splitting tensile strength and flexural strength of concrete increased first and then decreased. When the fly ash content is 12 %-18 % and the basalt fiber volume ratio is 0.1 %-0.15 %, the basalt fiber concrete has the best splitting tensile strength and flexural resistance.

引文

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