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Title |
Strength and CO2 Reduction of Fiber-Reinforced Cementitious Composites with Recycled Materials
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Authors |
이종원(Jong-Won Lee) ; 김선우(Sun-Woo Kim) ; 박완신(Wan-Shin Park) ; 장영일(Young-Il Jang) ; 윤현도(Hyun-Do Yun) |
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DOI |
https://doi.org/10.4334/JKCI.2017.29.4.379 |
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Keywords |
PVA FRCCs ; recycled materials ; mechanical properties ; CO2 emission ; binder intensity |
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Abstract |
The objective of this study is to develop sustainable PVA fiber-reinforced cementitious composites (FRCCs) that could exhibit comparable strength level to normal PVA FRCCs with no recycled materials. To evaluate mechanical properties of the FRCCs, compressive, flexural and direct tensile tests were conducted. In addition to the test, to calculate amount of carbon dioxide (CO2) emission at the stage of manufacturing the FRCCs, life cycle inventory data base (LCI DB) were referenced from domestic and Japan. From the test results, the mechanical properties such as compressive, flexural and direct tensile strengths were decreased as the replacement ratio of recycled materials increased. And it was determined that the amount of CO2 emission was reduced for the specimens with higher water-binder ratio (W/B) and replacement ratios. It was also found that binder intensity (?) value was higher as replacement ratio of fly ash (FA) increased. This result means that larger amount of FA is need to deliver one unit of a given performance indicator (1 MPa of strength) of FRCCs compared to that of ordinary portland cement (OPC). As a result, it could be concluded that FRCCs with W/B 45% replaced by FA 25% and recycled sand (RS) 25% is desirable for both target performance and CO2 emission.
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