바탕면 함수조건에 따른 마그네시아 인산칼륨 시멘트 모르타르의 부착성능
Bond Performance of Magnesium Potassium Phosphate Cement Mortar according to Moisture Condition of Substrate
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초록
본 논문은 바탕면의 함수조건에 따른 보수재료로서 MKPC의 인발 부착강도, 전단 부착강도, 계면 부착강도를 폴리머 시멘트 모르타르, 에폭시 모르타르와 비교 분석하였다. 그 결과 MKPC는 PC 및 MKPC와 비교하여 바탕면 함수조건에 따른 부착성능의 변화가 상대적으로 작은 것으로 나타났다. 또한 MKPC의 경우 절건 바탕면에서의 부착성능은 무기계 보수재료인 폴리머 시멘트 모르타르와 비교하여 우수한특성을 지니고 있으며, 습윤 바탕면에서의 부착성능은 폴리머 시멘트 모르타르와 유사한 수준을 보이고 있으나 에폭시 모르타르와 비교하여우수한 특성을 지니는 것으로 나타났다.
Abstract
This study focuses on the investigation of bond strength of magnesium potassium phosphate cement mortar(MKPC) according to moisturecondition of substrate. Tensile bond test, shear bond test and interfacial bond test are adopted for evaluating the adhesion characteristics of MKPCto conventional cement mortar substrate. The main experimental variables are test methods and moisture levels of substrate. Because the moisturecondition of the substrate may be critical to achieving bond, optimum moisture condition for a conventional concrete substrate has evaluated in thisstudy. The results are as follows ; The effects of moisture condition at substrate into the bonding of MKPC are less different than polymer cement mortarand epoxy mortar. But the saturated and surface dry condition is the most appropriate moisture level among the considered, followed by saturatedcondition and wet condition. Thus, an adequate moisture level of substrate for MKPC is essential for good bond strength.
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