摘要
在混凝土中掺入纤维能有改善混凝土的力学性能和抗裂性,但纤维的掺入也会降低混凝土的流动性,影响混凝土的浇筑质量,因此需要配制纤维高性能混凝土来同时提高混凝土的工作性和力学性能。本文在高性能混凝土中掺入玄武岩纤维,配制玄武岩纤维高性能混凝土,采用正交试验的方法,考察纤维掺量、水胶比、粉煤灰掺量、用水量和砂率对玄武岩纤维高性能混凝土强度和流动性的影响。通过正交试验分析了各影响因素对混凝土抗压强度、抗折强度和坍落度的影响程度;根据试验结果找到最优的玄武岩纤维高性能混凝土配合比;采用多元线性回归的方法,建立了玄武岩纤维高性能混凝土的力学性能以及工作性的预测模型。
Mechanical properties and crack resistance of concrete can be improved by the the incorporation of fiber, but the flowability and pouring quality of concrete should be reduced simultaneously. Therefore it is necessary to prepare the high-performance concrete reinforced by fiber in order to improve concrete workability and mechanical properties at the same time. With the high-performance concrete reinforced by basalt fiber, the orthogonal experiment was conducted to investigate the influence of fiber content, binder ratio, fly ash content, water and sand percentage on both the strength and flowability of the concrete. Through the orthogonal test, the influence degree of the factors was analyzed on the compressive strength, flexural strength and slump. Based on test results, the optimal mixing ratio of the high-performance concrete reinforced by basalt fiber was found. Ultimately, with the method of multiple linear regression, the forecast model was established to calculate the mechanical properties and workability of basalt fiber high-performance concrete.
出处
《土木工程与管理学报》
2013年第2期6-10,共5页
Journal of Civil Engineering and Management
基金
福建省自然科学基金(2010J05110)
关键词
玄武岩纤维
高性能混凝土
纤维掺量
坍落度
正交试验
basalt fiber
high performance concrete
fiber content
slump
orthogonal experiment
