Mechanical properties of steel fiber-reinforced, high-strength, lightweight concrete
Mechanical properties of steel fiber-reinforced, high-strength, lightweight concrete
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DOI：
10.1016/s0958-9465(97)00023-1
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发表时间：
1997-08-01
影响因子：
10.5
通讯作者：
Morino, K
中科院分区：
文献类型：
--
作者：
Gao, JM;Sun, W;Morino, K
介绍了抗压和抗折强度分别达到85.4 Mpa和11.8 Mpa的钢纤维高强轻质混凝土的基本力学性能。研究了钢纤维对混凝土弹性模量和泊松比的影响，并计算了弯曲断裂韧度。试验结果表明，纤维体积分数(V-f)和长径比(L(F)/d(F))对抗折强度和断裂韧性的影响非常显著，抗压强度仅略有提高，拉/压强度比明显提高。试验结果表明，随着V-f和L(F)/d(F)的增大，极限荷载对应的弯曲挠度增大，并且由于纤维阻挡开裂，荷载挠度下降分支的形状趋于平缓。(C)1997爱思唯尔科学有限公司。保留所有权利。
This paper presents basic information on the mechanical properties of steel fiber-reinforced, high-strength, lightweight concrete with compressive and flexural strengths up to 85.4 MPa and 11.8 MPa, respectively. The influence of steel fiber on modulus of elasticity and Poisson's ratio of concrete are investigated and flexural fracture toughness is calculated. Test results show that the effect of fiber volume fraction (V-f) and aspect ratio (l(f)/d(f)) on flexural strength and fracture toughness is extremely prominent, compressive strength is only slightly improved, and tensile/compressive strength ratio is obviously enhanced. It is observed that the flexural deflection corresponded to ultimate loan increased with the increase of V-f and l(f)/d(f), and due to fiber arresting cracking, the shape of the descending branch of load-deflection tends towards gently. (C) 1997 Elsevier Science Ltd. All rights reserved.