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PURPOSES: As a part of our research into repair techniques for roads that have collapsed as a result of a natural disaster, this study set out to find the optimum mix proportion for gravels to be used to restore a damaged area. METHODS: This study considered flow and strength-development characteristics. The experimental variables were the W/C ratio, the usage of the admixture, the types of cement, and the quantity of fine aggregate over three different experimental stages. The compressive strength was measured at 12 hours, one day, three days, and seven days. RESULTS : The flow varied with the amount of fine aggregate and the use of a high-range water-reducing (HRWR) admixture. The compressive strength also varied with respect to the type of cement and the W/C ratios. The strength satisfied the expected requirement of 21 MPa after one day, provided the mix proportion was appropriate. CONCLUSIONS: A gravel-filling high-flow cement-based mortar exhibited strength and consistency with a W/C ratio in the range of 0.40 to 0.45, assuming the use of HRWR at 0.5 to 0.7% and a fine aggregate/cement ratio of 1.0 to 1.5.
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참고문헌 (7)
참고문헌 신청
A. Smith / 1991 / A cementitious backfill that flows like a liquid, supports like a solid, and self-levels without tamping or compacting(Controlled low strength material) / The Aberdeen Group
B. W. Ramme / 1997 / Controlled Low-Strength Materials(CLSM) State-of-the-Art New Innovations / Supplementary Proceedings of Third CANMET/ACI International Symposium in Concrete Technology
Cho, Hyun Myung. / 2014 / Comparison of Setting Properties and Compressive Strength of Cement Paste for Emergency Restoration of Collapsed Road and Slope / 2014 Korean Recycled Construction Resource Institute Conference :31~36
Kim, Jong Baek. / 2012 / Strength Development and Durability Properties of Concrete using Early Strength Type Cement / 2012 Korea Concrete Institute Conference :267~268
Kim, Seung Won. / 2013 / Damage Cases of Road and Surface of Slope due to Heavy Rainfall / 2013 Korean Recycled Construction Resource Institute Conference :148~151
B. W. Ramme / 1997 / Controlled Low-Strength Materials(CLSM) State-of-the-Art New Innovations / Supplementary Proceedings of Third CANMET/ACI International Symposium in Concrete Technology
Cho, Hyun Myung. / 2014 / Comparison of Setting Properties and Compressive Strength of Cement Paste for Emergency Restoration of Collapsed Road and Slope / 2014 Korean Recycled Construction Resource Institute Conference :31~36
Kim, Jong Baek. / 2012 / Strength Development and Durability Properties of Concrete using Early Strength Type Cement / 2012 Korea Concrete Institute Conference :267~268
Kim, Seung Won. / 2013 / Damage Cases of Road and Surface of Slope due to Heavy Rainfall / 2013 Korean Recycled Construction Resource Institute Conference :148~151
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