• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.159-164
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• 2001

In this study, a polymer mortar sandwich panel (PMSP) was developed : Core was made with the polymer mortar whose compressive strength was about 840 kgf/$\textrm{cm}^2$, and both facings were made with the glass fiber reinforced plastics (GFRP). The results showed that the strain energies and the ductility indices increased 16-340 times and 2-8 times, respectively, as the thicknesses of facings increased from 0.6 to 3.0mm with fixing the core thickness to constants (12-36mm). On the other hand, these values showed a tendency of decrease as the core thickness increased regardless of thickness of facings. A set of basic data for the structural analysis could be provided by investigating the correlations, within the scope of this research, between the resisting moment and the thicknesses of core and facings.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 1999년도 추계학술발표대회 논문집
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• pp.143-148
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• 1999

In this paper we present the results of an analytical investigation on the existing concrete structures which are reinforced with carbon fiber grid. The carbon fiber grid and polymer mortar are utilized in the reinforcement of concrete column, beam, and tunnel lining. The physical and mechanical properties of the carbon fiber grid and polymer mortar were obtained experimentally and then used in the analytical investigation. In the analysis concrete structures are modeled with 3-D solid finite elements and the carbon fiber grid is modeled with space frame elements. Through the investigation reinforcing effect of carbon fiber grid on the existing concrete structures is confirmed.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 1999년도 추계학술발표대회 논문집
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• pp.154-159
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• 1999

In this paper we present tile results of an experimental investigation on the physical and mechanical properties of carbon fiber grid, polymer mortar, and carbon fiber grid reinforced plain concrete flexural members. In order to repairing and reinforcing damaged and/or deteriorated existing concrete structural members, new materials have been developed and utilized in the construction industries. But the physical and mechanical behaviors of the material are not well understood. To use the material effectively various aspects of the material must be throughly investigated analytically as well as experimentally. In this investigation we found the physical and mechanical properties of carbon fiber grid and polymer mortar which are directly utilized in the repair and reinforcement design of damaged or deteriorated concrete structures. In addition, we also investigate the strengthening effect of carbon fiber grid on the plain concrete flexural test specimens. It was found that the material can be used to repair and strengthen the concrete structures effectively.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.83-84
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• 2023

In this study, in order to utilize waste fishing net as a building materail, the possibility of replacing the fiber used in polymer repair mortar with waste fishing net fiber was confirmed. As for basic characteristics, flow, compressive strength, and flexural strength tests were performed to compare and analyze fiber performance, and the test results showed performance equal to or better than existing fibers.

• 폴리머
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• 제33권4호
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• pp.342-346
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• 2009

본 연구에서는 스티렌(styrene; St)과 부틸아크릴레이트(butyl acrylate; BA)를 단량체 비에 따라 합성 제조하고, 합성제조된 시멘트 혼화용 폴리머를 혼입한 폴리머 시멘트 모르타르의 물리적 성질과 내구성에 대한 특성을 보통 시멘트 모르타르와 기존에 생산되어 현장에 적용되고 있는 St/BA계 폴리머 시멘트 모르타르를 비교 분석하고자 하였다. 실험결과, St/BA의 단량체 비가 50:50, 60:40일 경우에는 시멘트 혼화용으로 사용하기에 가장 적합하였으며, 강도특성에서도 우수한 결과를 나타냈다. 또한, 방수성능과 염화물 이온에 대한 침투 저항성, 그리고 중성화 저항성도 St/BA의 단량체 비가 증가할수록, 폴리머 시멘트 비가 증가할수록 증진효과가 우수한 결과를 나타냈다. 따라서, 본 연구를 통해 합성제조된 St/BA 라텍스를 시멘트 모르타르에 혼입할 경우 우수한 성능개선 효과를 얻을 수 있었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 추계 학술논문 발표대회
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• pp.63-66
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• 2008

Not only mechanical properties, bonding properties, electro chemical properties, etc. but also fire safety is required in patch repair materials such as polymer modified cement mortar (PCM) which are used to deteriorated reinforced concrete structure. Unfortunately, it is very difficult to choice the appropriate repair materials because there are not enough information about fire safety properties of PCM. In this study, The combustion characters of PCM were evaluated through the heat release rate test and non-combustibility test. The pyrogenicity test uses the cone calorimeter based on the oxygen consumption method. The non-combustibility test is from the temperature change inside the furnace during the test. The effect of the types of polymer and polymer content were evaluated from the series of test. The results are like followings. 1) The higher the W/C of PCM, the lower the gross calorific value and heat generation rate in the heat release rate test. The amount of heat generation of PCM is like the order of VVA, EVA, and SBR in this study. 2) Some materials such as E45-100, E50-100, E60-100, S50-50, and S50-100 were estimated as not appropriate building materials in the non combustibility test.

• 한국건축시공학회지
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• 제23권2호
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• pp.133-142
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• 2023

본 연구에서는 열화 콘크리트 구조물의 보수 시 현재 범용적으로 사용하고 있는 폴리머 시멘트 모르타르의 내화성능을 확보하기 위한 최적 배합을 도출하고자 폴리머 혼입량(2, 4, 6, 8%)에 따른 PP섬유의 길이(6, 12mm) 및 PP섬유 혼입량(0.05, 0.1Vol%)에 따른 섬유혼입 폴리머 시멘트 모르타르의 내화성능을 평가하였다. 실험결과 함수율 및 폴리머 혼입률이 높을수록 폭렬발생 가능성이 증가하며, PP섬유의 길이가 길고 혼입률이 증가할수록 폭렬저감에 효과적인 것으로 나타났다.

• 한국구조물진단유지관리공학회 논문집
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• 제21권3호
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• pp.27-34
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• 2017

최근 유통 물류 산업의 발달로 산업용 창고 바닥의 중요성a이 점점 높아지고 있다. 본 연구에서는 기존의 바닥재료로 사용되어 온 일반 시멘트계 모르타르가 가지고 있는 유동성의 한계 및 긴 양생 시간 등의 단점을 보완할 수 있는 속경성 폴리머 모르타르 바닥소재를 개발하였다. 속경성 확보를 위해 초속경 시멘트를 결합재로 사용하였고, VAE 폴리머 분말수지를 5%~20% 혼입 범위로 설정한 4종류의 배합과 혼입하지 않은 Proto배합에 대한 기초물성을 유동성실험, 압축강도실험, 휨강도실험, 부착강도실험 및 마모실험을 통해 평가하였다. 유동성 실험결과를 통해 고성능 감수제량를 조절함으로써 플로우 250 mm 이상의 고유동 특성을 확보할 수 있었다. VAE 폴리머 혼입은 압축강도 감소에 영향을 미치는 것으로 나타났지만 휨강도는 Proto배합에 비해 우수하게 증진시킬 수 있어 압축강도/휨강도비를 증가시키는 것으로 평가되었다. 또한 최소 2.6배 이상의 부착강도 향상과 4배 이상의 마모저항성을 확보할 수 있었다. 역학적 실험을 통해 VAE 폴리머 최적 혼입률을 10%로 결정하였고, 현장적용 및 모니터링을 수행한 결과 VAE 폴리머를 혼입하지 않은 바닥재에 비해 오염도, 충격에 의한 저항, 부착성능 등이 우수한 것으로 나타났다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 가을 학술발표논문집(II)
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• pp.368-373
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• 1998

Prepackaged system consists out of a dry mix which contains cement, sand, redispersible polymer powder and admixtures in the right proportions. The purpose of this study is to evaluate the quality of prepackaged-type polymer-modified mortar products using redispersible poly(ethylene-vinyl acetate)(EVA) powder. Polymer-modified mortars using the redispersible polymer powder with powdered with powdered shrinkage-reducing agent were prepared with cellulose fiber contents of 0, 0.5, 1.0% and shrinkage-reducing agent contents of 0, 4%, and tested for drying shrinkage, strength, adhesion in tension, water absorption. From the test results, the prepackaged-type polymer-modified mortar products with 4% of shrinkage-reducing agent content give good properties. and that their properties largely depends on the shrinkage-reducing agent content rather than the cellulose fiber contents.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.175-176
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• 2013

Nowadays, energy-saving has become important in the construction industry. Above all things, outside insulation on buildings is important in measure of energy-saving. However, its insulation performance is degraded by the problem of that Cement-polymer modified waterproof coatings are used mostly for covering plaster mortar. In this study, we examine the optimum size of the silica and how does silica's size effect on physical properties of outside insulation covering plaster mortar.