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| 摘要: |
| 进行了最大粒径为25,31.5 mm的连续级配碎石钢纤维高强混凝土试验,研究了碎石粒径、水灰比、钢纤维长度及体积分数对钢纤维混凝土拌和物坍落度和硬化钢纤维混凝土立方体抗压强度、轴心抗压强度、劈裂抗拉强度、弯拉强度的影响规律,并与现行规程CECS38:2004《纤维混凝土结构技术规程》的相关强度计算公式进行了对比.结果表明:钢纤维在混凝土拌和物中的棚架效应将产生钢纤维混凝土拌和物坍落度减小的表象,在振动作用下该效应迅速瓦解而对试件成型影响较小;连续级配碎石最大粒径和钢纤维长度对钢纤维混凝土的抗压、劈裂抗拉强度影响较小,但对钢纤维混凝土弯拉强度的增强效果影响较大;可以采用现行规程确定最大粒径为31.5 mm的连续级配碎石钢纤维高强混凝土的抗压、劈裂抗拉强度,但弯拉强度的试验值则低于计算值. |
| 关键词: 钢纤维高强混凝土（SFRHSC） 大粒径碎石 坍落度 |
| DOI： |
| 分类号:TU528.572 |
| 基金项目:河南省高等学校创新人才培养工程培养对象资助项目(豫教高[2004]294号) |
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| Study of Steel-Fiber Reinforced High-Strength Concrete Containing Large Coarse Aggregate |
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ZHAO Shun-bo LI Chang-yong DU Hui QIAN Xiao-jun
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| Abstract: |
| Tests were conducted to investigate the properties of steel-fiber reinforced high-strength concrete(SFRHSC) containing large coarse aggregate in continuous gradation with maximum size of 25 mm and(31.5 mm) respectively.The mixture slump,the cubic and axial compressive strength,the splitting-tensile and flexural-tensile strength of SFRHSC are analyzed considering the factors of the maximum size of coarse aggregate,the water to cement ratio,the length and the volume fraction of steel fiber.The test results ar... |
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