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新型抗裂防渗水工混凝土是将钢纤维乱向分散于膨胀混凝土中 ,形成的一种集承重与防渗为一体的新型建筑材料 ,本文对其立方体抗压强度、劈拉强度、抗折强度、弯曲韧性、膨胀变形性能及配筋混凝土管件在内水压力下的轴拉性能 ,进行了系统的试验研究和理论分析 .试验结果表明 :钢纤维能有效限制膨胀混凝土的膨胀变形 ;钢纤维的限胀、阻裂增强作用 ,大大提高了膨胀混凝土的抗压、抗拉、极限抗折、抗折初裂强度 ,提高了弯曲韧性 ,改善了其抗渗性能 ;配筋钢纤维膨胀混凝土管 ,是经济、合理、实用的结构形式 .初步探讨了该混凝土的增强机理 ;给出了膨胀变形方程 .
The new anti-cracking and seepage-proof hydraulic concrete is a kind of new-type building material which integrates the load-bearing and anti-seepage of the steel fiber dispersedly in the expanded concrete. In this paper, the cube compressive strength, splitting tensile strength, Strength, flexural toughness, expansion and deformation performance and axial tensile performance of reinforced concrete pipe under internal water pressure, the experimental and theoretical analysis are carried out systematically.The experimental results show that steel fiber can effectively limit the expansion deformation of expansive concrete, Of the limited expansion, blocking the role of enhanced cracking, greatly increased the compressive strength, tensile strength, ultimate flexural strength, flexural strength, improved flexural toughness, and improved its impermeability; reinforced steel fiber expansion of concrete pipe , Is an economical, reasonable and practical structural form.The reinforcement mechanism of the concrete is preliminarily discussed, and the expansion deformation equation is given.