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박응모,조영국,소양섭 한국콘크리트학회 1998 콘크리트학회지 Vol.10 No.6
투수성 폴리머 콘크리트의 공극에 오염물질의 침투로 내구성 및 투수성능이 저하될 수있어 각종 필터용 폴리머 모르터를 그 위에 타설한 후, 압축강도, 휨강도 및 인장접착강도의 역학적 성질과 경화수축 및 투수성능을 실험을 실시하였다. 실험결과, 투수성 콘크리트의 압축강도의 증가와 함께 투수계수는 낮아졌으며, 충진재-결합재비의 증가에 따라 강도의 증가는 현저하였다. 투수성 폴리머 콘크리트의 압축강도와 투수계수는 9.4 MPa~1.93cm/s범위로서 배합에 따른 영향이 크게 나타났다. 필터용 폴리머 모르터를 타설한 투수성 폴리머 콘크리트의 역학적 성질은 쇄석을 필터로 사용하였을 때 가장 우수하였으며, 투수성 폴리머 콘크리트의 경화수축은 필터와 베이스 콘크리트 사이의 접착력에 영향을 크게 받음을 알 수 있었다. 본 연구결과, 투수성 폴리머 콘크리트의 각 배합조건에 따른 경제성과 성능면에서 균형을 이룰 수 있는 최적배합비를 제안할 수 있었으며 투수성 폴리머 콘크리트의 제작과응용면에 필요한 기초자료를 얻을 수 있었다. Covering polmer mortar as a filter for permeable polymer concrete on the base polymer concrete is nessary for good permeability from infiltration continuously. Therefore, three covering polymer mortars on the optimum base polymer concrete were cast immediatly following on the casting of the base polymer concrete. They are tested for compressive and flexural strengths, adhesion in tension, hardening shrinkage and permeability, and the effects of the mix proportioning factors on the properties of the permeable polymer concrete are discussed. From the test results, increase in the compressive strength and decrease in the coeffiecient of permeability of base polymer concrete are clearly obserbed with increasing filler-binder ratio. The base polymer concretes having a compressive strength of 9.4~28.3MPa and a coefficient of permeability of 0.12~1.93 cm/s can be produced in the consideration of the mix proportioning factors. Binder and filler contents in mix proportions had a great influence on the permeability of polymer concretes. The mechanical properties of permeable polymer concretes covered with polymer mortar using crushed stone are superior to other filters, and hardening shrinkage is the smallest in filters. It is apparent that adhesion between the base polymer concrete and polymer mortar is affected by the degree of hardening shrinkage. From this study, proper mix proportions can be recommended in the consideration of properties of the permeable polymer concrete.
무기계 자극제 첨가에 의한 삼성분계 혼합시멘트의 압축강도 증진 효과
박응모,문경주,소양섭 전북대학교 공업기술연구소 2001 工學硏究 Vol.32 No.-
The production and application of blast-furnace slag(BFS) and fly ash(FA) composite portland cement have the following advantages at least; 1. It can reduce the cost of cement production as well as enhance the utilization factor of BFS and FA. 2. The reduction of clinker can decrease air pollution compounds, such as CO_2, SO_2, NOx, during clinker processing. Whereas by increasing the proportion of mixed BFS and FA by a large degree in cement, some side problems would occur, such as a reduction of cement strength, especially at early ages, and setting time retardation Therefore, theis paper aims to investigate and develop by using stimulus agents with anhydrous gypsum, Al_2(SO_4)_3, hydrate lime and limestone, high -strength composite portland cement with large amounts of BFS and fly ash, and to explore for preliminary in fluence of stimulus agents on the composite portland cement. Laboratory investigations on a series of such mixtures have revealed the good early age properties and higher strength at later ages of composite cements by using a proper amount of stimulus agents. Keywords : blast furnace slag, fly ash, inorganic stimulus agents, compressive strength
폐석회와 석탄회를 다량 이용한 경화체의 내산성 특성에 관한 연구
이정재,고대형,문경주,박응모,소양섭 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2
This paper is au experimental study of the acid-resistance of hardening used by the unrefined fly ash and waste lime and to offer basic data to someone for recycling waste lime. The flow and specific gravity, compressive strength of the hardening are investigated. Within the test period of 90days, it is put in HCl(2%, 5%) and H₂SO₄(2%, 5%). In the results of test, The flow is decrease when mixing waste lime, and specific gravity is decrease. Acid-resistance was higher than cement mortar but weight decrease is higher in HCl, 5%. The more the addition ratio of cement it is increased, The less compressive strength and weight reduction is decreased in case of the immersion of H₂SO₄, 2% and 5%.