나노클레이 첨가량에 따른 나노재료 시멘트 모르타르에 정착된 보강섬유의 인발성능
Pullout Performance of Reinforcing Fiber Embedded in Nano Materials Cement Mortar with Nano Clay Contents
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Recently, it has been studied for the application of nano-materials in the concrete. Applied a small amount of nano-materials canachieve the goal of high strength, high performance and high durability. The small addition of nano clay improves strength, thermalstability, and durability of concrete because of the excellent dispersion. The present study has investigated the effectiveness, whenvarying with the contents of nano clay, influencing the pull-out behavior of macro synthetic fibers in nano materials cement mortar. Pullout tests conducted in accordance with the Japan Concrete Institute (JCI) SF-8 standard for fiber-reinforced concrete test methodswere used to evaluate the pullout performance of the different nano clay. Nano clay was added to the 0, 1, 2, 3, 4 and 5 % ofcement weight. The experimental results demonstrated that the addition of nano clay led to improve the pull-out properties as of theload-displacement curve in the precracked and debonded zone. Also, the compressive strength, flexural strength and pullout performanceand of Mix No. 1 and No. 2 increased up to the point when nano clay used increased by 2 and 3 % contents, respectively, butdecreased when the exceeded 3 and 4 %, respectively. It was proved by verifying increase of the scratching phenomenon in macrosynthetic fiber surface through the microstructure analysis on the surface of macro synthetic fiber.
Abstract
Recently, it has been studied for the application of nano-materials in the concrete. Applied a small amount of nano-materials canachieve the goal of high strength, high performance and high durability. The small addition of nano clay improves strength, thermalstability, and durability of concrete because of the excellent dispersion. The present study has investigated the effectiveness, whenvarying with the contents of nano clay, influencing the pull-out behavior of macro synthetic fibers in nano materials cement mortar. Pullout tests conducted in accordance with the Japan Concrete Institute (JCI) SF-8 standard for fiber-reinforced concrete test methodswere used to evaluate the pullout performance of the different nano clay. Nano clay was added to the 0, 1, 2, 3, 4 and 5 % ofcement weight. The experimental results demonstrated that the addition of nano clay led to improve the pull-out properties as of theload-displacement curve in the precracked and debonded zone. Also, the compressive strength, flexural strength and pullout performanceand of Mix No. 1 and No. 2 increased up to the point when nano clay used increased by 2 and 3 % contents, respectively, butdecreased when the exceeded 3 and 4 %, respectively. It was proved by verifying increase of the scratching phenomenon in macrosynthetic fiber surface through the microstructure analysis on the surface of macro synthetic fiber.
참고문헌 (15)
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