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http://dx.doi.org/10.4334/JKCI.2010.22.5.727

Mechanical Properties of Strain Hardening Cement-Based Composite (SHCC) with Recycled Materials  

Kim, Sun-Woo (Dept. of Architectural Engineering, Chungnam National University)
Cha, Jun-Ho (Dept. of Architectural Engineering, Chungnam National University)
Kim, Yun-Yong (Dept. of Civil Engineering, Chungnam National University)
Yun, Hyun-Do (Dept. of Architectural Engineering, Chungnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.5, 2010 , pp. 727-736 More about this Journal
Abstract
This paper describes results of an preliminary study to produce strain hardening cement-based composites (SHCCs)with consideration of sustainability for infrastructure applications. The aims of this study are to evaluate the influence of recycled materials on the mechanical characteristics of SHCCs, such as compressive, four-point bending, and direct tensile behaviors, and to give basic data for constitutive model for analyzing and designing infra structures with SHCCs. In this study, silica sand, cement, and PVA fibers, were partially replaced with recycled sand, fly-ash, and FET fibers in the mixture of SHCCs, respectively. Test results indicated that fly-ash could improve both bending and direct tensile performance of SHCCs due to increasing chemical bond strength at the interface between PVA fibers and cement matrices. However, SHCCs replaced with PET fibers showed much lower performance in bending and direct tensile tests due to originally low mechanical properties of own fibers, although compressive behavior is similar to PVA2.0 specimen. Also, it was noted that the recycled sand would increase elastic modulus of SHCCs due to larger grain size compared to silica sand. Based on pre-set target value to maintain the performance of SHCCs, it was concluded that the replacement ratio below 20% of fly-ash or below 50% of recycled sands would be desirable for creating sustainable SHCCs.
Keywords
Strain-hardening cement composite; Recycled sands; Fly-ash; PET fibers; Mechanical behavior;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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