Latex-modified Engineered Cementitious Composites (L-ECC)

Chen, Zhitao; Yang, En-Hua; Yao, Yang; Yao, Yan

doi:10.3151/jact.12.510

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…In addition to first flexural cracking strength, the flexural strength of ECC mixtures incorporating crumb rubber also shows a downward trend, which indicates a decrease in fiber bridging capacity by incorporating crumb rubber (Li 2012). This may be attributed that large amount of crumb rubber leads to reduced contact area between fibers and matrix which is very similar to the phenomenon observed in latex-modified ECC (Chen et al 2014), thus lowering the fiber/matrix interfacial bond. Table 5 lists the load-deflection response of ECCs, as list, first flexural cracking energy and fracture energy are evaluated by integrating areas under load-deflection curve of ECC corresponding to first flexural cracking and flexural strength.…”

Section: Id Fracture Force (N)mentioning

confidence: 71%

Investigation on Properties of ECC Incorporating Crumb Rubber of Different Sizes

Zhang

Qian

2015

ACT

102

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In the past decades, incorporating crumb rubber into concrete has attracted attention in the field of building materials due to the properties improvement it brought. In this study, crumb rubber of two particle sizes (40CR and 80CR, which have a sieve size of 400 μm and 220μm, respectively) is incorporated into engineering cementitious composite (ECC) material to replace silica sand. Furthermore, three different replacement percentages (0, 15%, 25% by volume) for each crumb rubber size are conducted in this study. The influence of crumb rubber on the ECC is revealed via density, compressive strength, flexural performance, drying shrinkage, restrained shrinkage and environment footprint. The experimental results show that the incorporation of crumb rubber into ECC increases bending deformation capacity, decrease density and compressive strength. While the free drying shrinkage of ECC increases with the addition of crumb rubber, lesser crack number, crack width and cracking tendency were found in the restrained ring test when compared to ECC without crumb rubber. In terms of crumb rubber size, ECC with smaller crumb rubber appear to have lower density and higher bending defamation capacity and shrinkage than those with larger crumb rubber. In addition, incorporating crumb rubber into ECC reduces CO 2 emission, thus improve the greenness of ECC to a certain degree.

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Section: Id Fracture Force (N)mentioning

confidence: 71%

Investigation on Properties of ECC Incorporating Crumb Rubber of Different Sizes

Zhang

Qian

2015

ACT

102

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“…The toughness index was expressed as a ratio of first cracking strain energy (G i ) to the bending fracture strain energy (G p ). 26 As can be seen from the results in Table 5, after adding nanomaterials, the toughness index of SHCC increased in comparison with the control SHCC. This meant that the addition of nanomaterials can further improve the toughness of SHCC.…”

Section: Four-point Bendingmentioning

confidence: 85%

Effect of nanoparticles on quasi-static and dynamic mechanical properties of strain hardening cementitious composite

Chen

Yao

2019

Advances in Mechanical Engineering

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The nanomaterials-modified strain hardening cementitious composites were prepared in this study. The split Hopkinson pressure bar technique was used to conduct the dynamic compressive test. The dynamic compressive properties were evaluated and compared with the quasi-static properties. The experimental results indicated that the addition of nanomaterials had positive effect on improvement of the strength and toughness of strain hardening cementitious composite. The strain hardening cementitious composite with and without adding nanomaterials showed an obvious strain rate dependence, and the nanomaterials-modified strain hardening cementitious composite was more sensitive to the strain rate.

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“…The mixture without GGBS substitution is used as control mix denoted as C. The mixtures with 20%, 40% and 60% GGBS replacement level are denoted as G1, G2 and G3, respectively. The mixtures are mixed followed by a typical ECC mixing procedure described by Chen [9]. For each mix, Three 50 mm cubes for compressive strength tests, three 50 mm cubes for determine dry density and thermal conductivity and after that for determination o f rate of water absorption and five dogbone specimens for direct tension tests are prepared.…”

Section: Experimental Programmentioning

confidence: 99%

High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere

Chen¹,

Li²,

Yang³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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High strength lightweight concrete was originally designed for potential structural applications. However, the brittle nature and higher permeability became the main drawbacks for further broad application. In this case, it is imperative to develop a special type of high strength strain hardening lightweight cementitious composite, offering higher ductility, lower permeability and considerable weight saving. Engineered cementitious composite (ECC) is a class of high performance fiber reinforced composite characterized by strain hardening behavior and tight crack width. In this study, the low density of below 1500 kg/m 3 was achieve by introduce lightweight fine aggregates of cenosphere obtained from coal-fired power station to fully replace silica sand generally used in ECC preparation. Binary and ternary binder systems (cement, silica fume and slag) were employed to tailor the matrix properties for obtaining higher strength of more than 50 MPa and lower permeability. Polymeric fibers having a good compatibility with matrix were used to implement strain hardening behavior and higher ductility. The permeability and thermal conductivity tests were conducted to evaluate the applicable performance of resulting lightweight cementitious composite. The correlation between mechanical, physical and thermal properties was build up to reveal the effect of cenosphere on the performances of high strength lightweight strain hardening cementitious composite. The single fiber pull out test and matrix fracture toughness test were conducted to reveal the micromechanical mechanism of strain hardening behavior of high strength lightweight composites.

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Latex-modified Engineered Cementitious Composites (L-ECC)

Cited by 14 publications

References 21 publications

Investigation on Properties of ECC Incorporating Crumb Rubber of Different Sizes

Investigation on Properties of ECC Incorporating Crumb Rubber of Different Sizes

Effect of nanoparticles on quasi-static and dynamic mechanical properties of strain hardening cementitious composite

High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere

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