首页|复合固体废弃物及钢纤维对混凝土抗压强度的试验研究

复合固体废弃物及钢纤维对混凝土抗压强度的试验研究

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为了促进固体废弃物在混凝土生产中的使用,解决因固体废弃物大量堆积带来的次生环境污染问题,以煤矸石碎石等质量取代粗骨料、煤矸石砂等质量取代细骨料、钢纤维掺量和粉煤灰等质量取代水泥为影响因素,设计四因素四水平正交试验法探究固体废弃物和钢纤维对混凝土立方体抗压强度的影响,采用多种分析方式,得到了不同因素水平下的主次因素、最优掺量和强度预测模型,并从微观层面利用SEM分析了不同材料的微观结构及其对强度的增强机理.得出结论:各因素对立方体抗压强度的影响程度为粉煤灰取代率>煤矸石碎石取代率>钢纤维掺量>煤矸石砂取代率;强度最高时的组合为煤矸石碎石取代率30%、煤矸石砂取代率15%、钢纤维掺量1.2%、粉煤灰取代率10%;得到的强度预测模型精度较高,可以在所提出的正交试验选取的范围内对强度进行预测.
Experimental Study on Compressive Strength of Concrete with Composite Solid Waste and Steel Fiber
To promote the use of solid waste in concrete production and solve the problem of secondary envi-ronmental pollution caused by the large accumulation of solid waste,factors such as coal gangue and gravel replacing coarse aggregate,coal gangue and sand replacing fine aggregate,steel fiber content and fly ash re-placing cement are used as influencing factors.A four factor and four level orthogonal experimental method is designed to explore the influence of solid waste and steel fiber on the compressive strength of concrete cube.Multiple analysis methods are used to obtain the primary and secondary factors,optimal dosage and strength prediction models at different factor levels.SEM is used to analyze the microstructure of different materials and the strengthening mechanisms at the micro level.It is concluded that the degree of influence of various factor on the compressive strength of the cube is as follow:the replacement rate of fly ash>the replacement rate of coal gangue and gravel>the content of steel fiber>the replacement rate of coal gangue and sand.The combination with the highest strength has a replacement rate of 30%for coal gangue and gravel,15%for coal gangue and sand,1.2%for steel fiber,and 10%for the replacement rate of fly ash.The obtained strength prediction model has high accuracy and can predict the strength within the range se-lected by the proposed orthogonal experiment.

coal ganguefly ashsteel fibercompressive strengthorthogonal test

赵庆明、张圣儒、杨长有、卢相达

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长春工程学院,长春 130012

吉林省建筑一体化集成技术科技协同创新中心,长春 130012

长春华大房地产开发有限责任公司,长春 130052

煤矸石 粉煤灰 钢纤维 抗压强度 正交试验

2024

长春工程学院学报(自然科学版)
长春工程学院

长春工程学院学报(自然科学版)

影响因子:0.328
ISSN:1009-8984
年,卷(期):2024.25(4)