• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.277-280
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• 2005

Epoxy-mortar composites have been wildly used as finishing and repairing materials in the construction because of their excellent properties. Conventional epoxy-mortars and concretes have an inferior applicability and cost performance ratio due to the two component mixing of the epoxy resin and hardener. In this study, we examined the engineering effect of compressive strength and flexible strength according to the various epoxy-hardener in underwater and humidity environment, and evaluated the hardener types and physical effect of Epoxy mortar using cement binder in underwater and air condition. In this study, it was clarified that the engineering properties of repairing epoxy-motars were effected by the type of hardener.

• 한국구조물진단유지관리공학회 논문집
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• 제21권1호
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• pp.15-22
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• 2017

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 우수한 특성을 지니고 있으며, 습윤 바탕면에서의 부착성능은 폴리머 시멘트 모르타르와 유사한 수준을 보이고 있으나 에폭시 모르타르와 비교하여 우수한 특성을 지니는 것으로 나타났다.

• 콘크리트학회논문집
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• 제15권5호
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• pp.739-746
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• 2003

Various researches on the application of polymer dispersions to the cement mortar and concrete have been carried out in many countries like America, Japan and Germany and so on due to their high performance and good modification effect. PAE of polymer dispersion widely used in situ was employed that the high flowability may be induced in the cement mortar. In order to investigate the modification of cement mortar with high flowability by PAE and fracture mode of adhesive strength properties in tension of that, experimental parameters were set as PAE solid-cement ratio(P/C) and cement: fine aggregate(C:F) and the experiments such as unit weight, flow, consistency change, crack resistance and segregation that inform on the general properties have been done. Adhesion in tension is measured with a view to comprehending the properties and fracture mode in tensile load. Consistency change of cement mortar modified by PAE did grow better as the ratio of PAE solid-cement increased and was much superior to that of resin based flooring such as polyurethane and epoxy which recorded the loss of consistency in 90 min. after mixing. Adhesive strength in tension increased with continuity during curing period and showed the maximum in case of C:F=1:1 and P/C=20%.

• 콘크리트학회논문집
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• 제18권6호
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• pp.801-809
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• 2006

기존의 에폭시 수지는 많은 우수한 성질을 갖고 있음에도 불구하고, 주제와 경화제의 2성분 혼합의 복잡성, 높은 폴리머 시멘트비에 따른 경제성 등이 사용성을 제약하고 있다. 여기에서 저자들은 에폭시 수지가 경화제를 첨가하지 않아도 시멘트 모르타르의 수화에 의해 생성되는 알카리 성분에 의해 경화할 수 있다는 것을 알아냈다. 본 연구는 기존의 경화제 무첨가 에폭시 시멘트 모르타르의 연구 결과를 기초로 하여 1년간 실내외에 노출하여 내후성을 평가하였다. 다양한 폴리머 시멘트비로 만든 에폭시 시멘트 모르타르를 제작하여, 노출기간 28일, 6개월, 1년에 대한 중량변화율, 휨강도 및 압축강도, 흡수율, 중성화 깊이를 측정하였으며, 세공입경 분포와 내부 미세조직 구조 등을 관찰하였다. 시험 결과, 경화제를 첨가하지 않아도 에폭시 시멘트 모르타르의 내후성은 기존의 경화제를 첨가한 경우에 비해 역학적 성질 및 내구성 면에서 동등 이상으로 우수하였으며, 이상적인 경화제 무첨가 에폭시 시멘트 모르타르의 폴리머 시멘트비는 10% 또는 20%로 제안할 수 있었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.107-108
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• 2011

The purpose of present study is to examine the application of effective curing to hardener-free epoxy-modified mortars. The epoxy-modified mortars are prepared with polymer-cement ratios, subjected to two types of curing conditions, and tested for compressive, flexural and tensile strengths. As a result, hardener-free epoxy-modified mortars with steam curing is markedly improved with increasing air-dry curing period. High strength development of the epoxy-modified mortars may be achieved by the dense microstructure by cement and the hardener of the epoxy resin in the mortars.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.255-257
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• 2012

Epoxy resin without any hardener can harden in the presence of hydroxide ions in cement mortars and concretes at ambient temperature. The purpose of present study is to examine the hardening properties of hardener-free epoxy-modified mortars by curing conditions. The hardener-free epoxy-modified mortars using diglycidyl ether of A epoxy resin are prepared with various polymer-cement ratios, and subjected to initial moist/dry curing, initial steam(90℃) curing, initial steam/heat(80℃, 100℃) curing.As a result, degree of hardening of epoxy resin in initial moist/dry cured, initial steam cured and initial steam/heat(80℃) cured hardener-free epoxy-modified mortars is decreased with increasing polymer-cement ratio. However, it is markedly improved with additional dry-curing periods. On the other hand, regardless of the polymer-cement ratio and dry curing periods, degree of hardening of hardener-free epoxy-modified mortars with initial steam/heat(100℃) cure is over 95%.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.163-164
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• 2020

The purpose of this study was to evaluate the shrinkage properties of a tile reinforced with epoxy resin, which has the advantages of high adhesion and low shrinkage, and causes a hardening reaction by chemical bonding with cement mortar. As a result, since the epoxy resin adhesive suppresses the moisture evaporation of the mortar, the drying shrinkage of the mortar itself is reduced, accordingly, the shrinkage of the tile itself is greatly reduced, and it is thought that it is possible to prevent a decrease in adhesion due to shear stress.

• Advances in materials Research
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• 제5권3호
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• pp.171-179
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• 2016

Fusion and characterization of bisphenol-A diglycidyl ether based thermosetting polymer mortars containing an epoxy resin, Fly ash and Rock sand are presented here for the Experimental study. The specimens have been prepared by means of an innovative process, in mild conditions, of commercial epoxy resin, Fly ash and Rock sand based paste. In this way, thermosetting based hybrid mortars characterized by a different content of normalized Fly ash and Rock sand by a homogeneous dispersion of the resin have been obtained. Once hardened, these new composite materials show improved compressive strength and toughness in respect to both the Fly ash and the Rock sand pastes since the Resin provides a more cohesive microstructure, with a reduced amount of micro cracks. The micro structural characterization allows pointing out the presence of an Interfacial Transition Zone similar to that observed in cement based mortars. A correlation between micro-structural features and mechanical properties of the mortar has also been studied.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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• pp.164-167
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• 2004

The purpose of this study is to investigate the properties of composite systems using polymer cement and epoxy resins for waterproofing and anti-corrosion to concrete structures such as water supply facilities and sewage-works. In this study these engineering properties of composite systems using polymer-modified mortar and epoxy resins were examined and could be confirmed to satisfy the guidelines of KS. Especially, it was turn out that the adhesion properties was excellent and high crack-resistance up to 1.49mm will be perform.

• 한국구조물진단유지관리공학회 논문집
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• 제11권5호
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• pp.89-98
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• 2007

본 연구에서는 RC구조물의 접착 보수 보강 재료의 박리와 연관한 변형 거동에 대하여 검토하였다. 응력-변형곡선에서 최대응력 이후 항복을 일으킬 수 있는 변형량은 바탕재인 시멘트 모르터의 경우 $2.0{\times}10^{-3}$, 콘크리트는 $1.3{\times}10^{-3}$ 전후이고, 접착제인 에폭시수지 $0.8{\times}10^{-3}$, 폴리머 시멘트 모르터 $2.5{\times}10^{-3}$이며, 보강재인 강판과 탄소봉은 2.5와 $9.1{\times}10^{-3}$정도인 것으로 밝혀졌다. 온도변화에 따른 선팽창계수는 바탕재인 시멘트 모르터 및 콘크리트의 경우 $10{\mu}{\varepsilon}/{^{\circ}C}$전후인데 비하여, 접착제인 에폭시 수지는 $41{\sim}54{\mu}{\varepsilon}/{^{\circ}C}$, 폴리머 시멘트 모르터는 $-0.5{\sim}0.7{\mu}{\varepsilon}/{^{\circ}C}$, 보강재인 강판은 바탕재료와 비슷하지만, 탄소섬유는 $-1.7{\mu}{\varepsilon}/{^{\circ}C}$로 제일 작은 값이었다. 특히 바탕재료인 콘크리트와 에폭시수지 접착제간에는 온도변화에 따른 선팽창계수 차이가 크게 발생하였는데, 에폭시 수지 종류에 따라 약간의 차이는 있지만, $20{\sim}35{^{\circ}C}$이상의 온도차가 발생하는 조건이면 에폭시수지 접착제는 콘크리트 접착면에서 자연적으로 박리 할 수도 있는 것으로 밝혀졌다.