Matrix design of light weight, high strength, high ductility ECC
Matrix design of light weight, high strength, high ductility ECC
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轻质、高强、高延性ECC矩阵设计
DOI：
10.1016/j.conbuildmat.2019.03.159
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发表时间：
2019-06
影响因子：
7.4
通讯作者：
Qian Shunzhi
中科院分区：
文献类型：
--
作者：
Zhang Zhigang;Yuvaraj Ananya;Di Jin;Qian Shunzhi
近十年来，高强高韧工程水泥基复合材料的研究在国内外引起了广泛的关注。然而，由于HSHD-ECC的高基体韧性，饱和多裂纹现象很少观察到，因此阻碍了其鲁棒性和高应变能力。本文设计的ECC混合料具有相对较弱的基质，允许更多的裂纹萌生，同时保持高强度，高延性以及重量轻的特点。结果表明，掺引气剂（AEA）的ECC混合料的抗压/抗拉强度略有提高，而掺轻质填料（LWF）的ECC混合料的抗压/抗拉强度则有相反的趋势。然而，所有ECC混合物的抗压强度都超过60 MPa，满足高强混凝土的要求。此外，AEA和LWF材料的加入有效地降低了HSHD-ECC的基体韧性和密度，从而显著提高了其应变能力和饱和开裂程度。特别是添加粉煤灰空心微珠（FAC）的HSHD-ECC的应变能力可达12.5%。在细观尺度上，HSHD-ECC的基体设计改变了纤维/基体界面的摩擦结合强度，实验结果很好地解释了5种ECC混合料拉伸强度的变化趋势。
In the past decade, the research on high strength, high ductility engineered cementitious composites (HSHD-ECC) has drawn much attention worldwide. However, due to the high matrix toughness associated with HSHD-ECC, saturated multiple cracking phenomena was rarely observed, hence hindering its robustness and high strain capacity. In this paper, ECC mixtures with relatively weak matrix were designed to allow much more cracks to be initiated, meanwhile retaining features of high strength, high ductility as well as light weight. The experimental results showed that ECC mixtures with addition of air entraining agent (AEA) increases the compressive/tensile strength slightly, while adding light weight filler (LWF) materials into ECC mixtures show the opposite tendency. However, all ECC mixtures exceed 60 MPa in compressive strength that satisfy the requirement of high strength concrete. In addition, incorporating AEA and LWF materials into HSHD-ECC lowered its matrix toughness and density effectively, as a result, increased its strain capacity and extent of saturated cracking significantly. In particular, the strain capacity of HSHD-ECC with addition of fly ash cenosphere (FAC) could reach 12.5%. At micro-scale level, the fiber/matrix interfacial frictional bond was altered with the matrix design in HSHD-ECC, and the experimental findings well explained the change tendency in tensile strength of five ECC mixtures based on micromechanics theory.
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DOI：
10.1088/1757-899x/272/1/012035
发表时间：
2017-12
期刊：
IOP Conference Series: Materials Science and Engineering
影响因子：
--
作者：
Trong‐Phuoc Huynh;C. Hwang;Shu Yang
通讯作者：
Trong‐Phuoc Huynh;C. Hwang;Shu Yang
无钢筋混凝土结构使用超高延性水泥基复合材料的可行性
影响因子：
5.5
作者：
Kequan Yu;Lingzhi Li;Jiangtao Yu;Jianzhuang Xiao;Junhong Ye;Yichao Wang
通讯作者：
Yichao Wang
DOI：
10.1061/(asce)0899-1561(2001)13:6(399
发表时间：
2001-11-01
影响因子：
3.2
作者：
Redon, C;Li, VC;Ogawa, A
通讯作者：
Ogawa, A
影响因子：
1.7
作者：
K. Wille;A. Naaman;G. Parra-Montesinos
通讯作者：
K. Wille;A. Naaman;G. Parra-Montesinos
DOI：
10.14359/51685784
发表时间：
2013-07
期刊：
Scopus
影响因子：
--
作者：
R. Ranade;V. Li;Stults;T. S. Rushing;J. Roth;W. Heard
通讯作者：
R. Ranade;V. Li;Stults;T. S. Rushing;J. Roth;W. Heard