• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.265-266
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• 2012

The purpose of this study was to investigate the compressive strength property into mortar using rice straw ash. In an effort to evaluate the effects of rice straw ash firing temperatures on compressive strength properties of mortar, a change in the components of rice straw ash was observed according to firing temperatures, and compressive strength of mortar and X.R.F was measured. As a results, As the mortar with a mixture ratio of rice straw ash up to 15% was found to have a compressive strength superior to that of plain mortar.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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• pp.156-159
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• 2004

The intention of this study is to reduce the plastic shrinkage of the polymer modified cement mortar using the PVA fiber. The durability of PVA fiber reinforced polymer cement mortar was also evaluated. The test results of PVA fiber reinforced polymer modified cement mortar were compared with plain polymer modified cement mortar(non-fiber). In conclusion, PVA fiber reinforced polymer modified cement mortar showed an ability to reduce the total crack area and maximum crack width significantly. Also. fiber reinforced polymer modified cement mortar show improved durability performance.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.203-208
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• 1999

The purpose of this study is to examine the bond properties of polymer cement mortar. Generally, cement mortar using polymer has been used that recovering the deteriorative concrete structure performance. In this case, it is very important problem to become a monolithic construction by bonding property. In this study, it is evaluated with other properties that adhesion strength between polymer cement mortar and concrete substrate. And polymer cement mortar was compared with plain cement mortar by scanning electron microscope.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.343-348
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• 1999

The purpose of this study is to evaluated the effects of added expanded polystyrene on the basic properties of UP mortar. Polyester resin mortars are prepared with expanded polystyrene ratio in styrene monomer (EPS/PS), and the ratio of total polystyrene resin to UP resin (PS/UP). And it is tested for viscosity of UP resin added PS resin, slump-flow test, working life, flexural and compressive strengths, and curing shrinkage test. From the test result, Viscosity of resin for polymer mortar increases with increasing PS content. Curing shrinkage of UP mortar is considerably smaller than that of plain UP mortar, nevertheless, reduction in the strengths is not recognized according to adding PS resin. In this study, we can obtain the optimum mix proportions of polymer mortar using PS resin.

• 한국건축시공학회지
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• 제15권2호
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• pp.193-199
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• 2015

최근, 콘크리트 산업에서는 $CO_2$ 배출량감소등 환경문제와 함께 부존자원의 고갈대책도 중요한 문제점으로 제기되어, 이를 동시에 해결하기 위하여 각종 산업부산물이나 산업폐기물을 콘크리트용 자원으로 재이용하는 방법이 연구되고 있다. 본 연구는 고로슬래그 미분말(BS)과 순환잔골재(RFA) 혼합 모르타르를 기반으로 하여 BS의 잠재수경성 반응을 탈황석고(FGD)와 보통포틀랜드 시멘트(OPC)의 자극반응으로 추가 활성화시킴으로써 일반 강도영역까지의 모르타르 활용성을 검토하고자 하였다. 결과적으로, BS에 FGD 10%, OPC 30%를 치환하고 RFA를 사용할 경우 OPC만을 사용하는 플레인 모르타르의 80%정도인 보통강도모르타르가 발휘되었지만 실용적인 측면에서 유동성적으로 플로치를 동일하게 유지하는 물-결합재를 낮춰 주게 된다면 더욱 플레인 강도영역에 근접할 수 있을 것으로 사료된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2001년도 학술논문발표회
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• pp.64-69
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• 2001

This study is the fundamental report to propose the capability of discarded Bentonite by heat-treatment as concrete mineral admixture. The experiment is performed by flow test of mortar and by compressive strength of 7, 14, 28, 91 days, As a result of experiment about mortar using discarded Bentonite by heat-treatment, in the case of $500^{\circ}C$, $600^{\circ}C$, $700^{\circ}C$, $800^{\circ}C$.60min, compressive strength is superior to the every situation than plain Mortar. Especially, in the case of $700^{\circ}C$.60min, as strength activity index is measured by 109%, it can be applied as concrete mineral admixture. But, flow of Mortar using discarded Bentonite by heat-treatment is decreased about 2.5cm in the case of 30min and about 1.7cm in the case of 60min.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 가을 학술논문 발표대회
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• pp.67-68
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• 2021

In this study, Repair mortar was prepared using CNT powder with improved dispersibility and its characteristics were analyzed. As a result of the experiment, the compressive strength and flexural strength were found to be at similar levels compared to Plain without CNT. In addition, as a result of the drying shrinkage test, it was found that the drying shrinkage amount was decreased due to the effect of CNT mixed into the porous material filling the internal pores of the repair mortar.. The Bond strength of the repair mortar was at a similar level regardless of whether CNT was added or not

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.165-166
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• 2022

In this paper, the characteristics of slag cement mortar added with neutralized liquid red mud with nitric acid to reduce pH by neutralizing liquid red mud with nitric acid were reviewed to improve strength degradation of cement concrete added with liquid red mud. As a result, the compressive strength of cement mortar added with liquid red mud was higher than that of Plain on 1 and 3 days, and the strength of red mud neutralized with nitric acid was lower than that of cement mortar added with liquid red mud on 7 days, but the strength was recovered on 28th. It was found that the addition of red mud has the effect of improving the strength in the early age.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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• pp.243-248
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• 2001

The objective of this study is to investigate the thermal conductivity of cement mortar for apartment housing floor using expansive admixture, copper fiber, cower lathe, hollowed aluminum plate. According to test results, temperature at point (a) located above heating pipe does not show significant variation with age, and temperature at (b), which is located at the finishing surface above heating pipe, and temperature at (c), which is located at center surface between heating pipe has remarkable change. Temperature distribution sat (b) are in order for, structure containing copper fiber>plain structure>structure containing hollowed aluminum plate>structure containing expansive admixture. Temperature distribution, shows high tendency in order for, structure containing copper fiber>structure containing copper lathe>structure containing hollowed aluminum plate>plain structure>structure containing expansive admixture. (a) estimation of temperature distribution is determined with the variation of temperature between (b) point and (c) point during 60 minutes heating.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 추계 학술논문 발표대회
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• pp.53-54
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• 2014

This study evaluates engineering properties of mortar using lightweight fine aggregate made by bottom ash discharged air cooling process according to grading. Then we confirm possibility of use as lightweight fine aggregate. Consequently, Mix using bottom ash need additional examination for a change with the passage of time of flow. Also, mix of S indicates similar compressive strength with mix of Plain and 16% decrease of unit weight compared to mix of Plain; while mix of B indicates 10% decrease of compressive strength and 16% decrease of unit weight. Therefore, this study shows that mix of S and B is superior compared with other mix.