• Title/Summary/Keyword: Floor Surface Finishing Mortar

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A Study on the Dry-Shrinkage Properties For Floor Mortar With Crack-Reducing (균열저감형 바닥마감전용 모르터의 건조수축특성 연구)

  • 이종렬;이웅종;채재홍;박경상;김기수
    • Proceedings of the Korea Concrete Institute Conference
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    • 1999.04a
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    • pp.175-180
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    • 1999
  • The heating system of korea apartment house is called Ondol. The surface finishing mortar of this floor system typically used the cement based mortar, where the surface finishing mortar easily appears the crack. To order to crack control, the cement that added expansive additive used to reducing dry-shrinkage. For the surface finishing mortar, the types of shrinkage is known as plastic shrinkage, dry-shrinkage and autogenous This experimental study is to investigate the difference on dry-shrinkage of the cement that added expansive additives and OPC. The test method is varied the ration of water/cement (W/C) and the ratio of sand/cement(S/C). For OPC, The increase of the ratio of S/C is reduced dry-shirnkage but for the cement that added expansive additives, the increase of the ratio of S/C is augmented dry-shrinkage For OPC, The increase of the ratio of W/C is augmented dry-shrinkage but for the cement that added expensive, the increased of the ratio of W/C is reduced dry-shrinkage.

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A Study on the Crack Prevention of the Floor Surface Finishing Mortar adding Chemical Admixtures in Apartment Houses (혼화제를 사용한 공동주택 바닥마감 모르타르의 균열저감에 관한 연구)

  • Lee, Dong-Un
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.2
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    • pp.1541-1548
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    • 2015
  • In this study, strengthening methods of floor surface finishing mortar are investigated to prevent the cracks using crack inhibitor agents, water reducer agent and resin. As a results, The number of crack and compressive strength of the specimen containing water reducer agent or resin had more effective than other specimens containing inhibitor agents at 7 days. And the highest compressive strength specimen showed the relatively no crack, but the lowest compressive strength specimen showed a lot of crack. Therefore the relationship between the crack growth and the compressive strength had proportional connection. A base on the mock-up test, long-term monitoring of the on-site applied to mixing design type3 showed the few cracks.

Properties of Thermal Conductivity of Cement Mortar for Apartment Housing Floor Using Combined Strengthening Method (공동주택 바닥용 시멘트 모르타르의 복합강화법 변화에 따른 열전도 특성)

  • 윤길봉;전충근;정성철;윤기원;한천구
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.05a
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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.

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An Experimental Study on Material Property of Parking Zone Flooring Occupancy Surface Finishing Used to Environment-friendly.High-liquidity Ceramic Resin Mortar (친환경.고유동 세라믹 수지 모르타르를 이용한 주차장 바닥용 표면 마감의 재료적 특성에 관한 실험적 연구)

  • Lee, Sun-Gyu;Moon, You-Seok;Lee, Hyung-Jun;Lee, Wan-Hwi;Oh, Sang-Keun
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.04a
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    • pp.829-832
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    • 2008
  • Since the early 1980s, the building is dramatically higher increases. Therefore, the shortage of parking spaces as a social problem has been pointed out. The parking lot utilization of underground space is increasing by like this problem solving countermeasure. However, Most of the organic material is used for construction in the parking lot on the floor. The existing parking zone flooring occupancy surface finishing is harmful gases and environmental hormones cause of the worker. The study on the safety of the worker consider using environment-friendly?high-liquidity ceramic resin mortar materials to evaluate the characteristics and physical properties.

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Characteristics of Volatile Organic Compounds Emitted in Building Materials and Their Predictions of Time-dependent Variation

  • Pang, Seung Ki;Sohn, Jang Yeul;Lee, Kwang Ho
    • Architectural research
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    • v.7 no.1
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    • pp.19-26
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    • 2005
  • Unlike other countries, Korea uses various kinds of wall-paper as finishing material. Conventional wall-paper consists of paper and vinyl, and petrochemical ink is used for the decoration of the surface. Adhesive is used to paste the wall with the wall-paper, which emit substantial amounts of VOCs and formaldehyde. In this study, VOCs characteristics emitted from specimens made of concrete, mortar, gypsum board and wall-paper were investigated using small chamber method. Moreover, concentration and emission factor of BTEX(Benzene, Toluene, Ethylbenzene, m,p,o-Xylene) and TVOC were investigated, and concentration and emission factor decay were estimated. As a result of the prediction, both time-dependent concentration decay and cumulative concentration can be converted into the logarithmic scale. Furthermore, prediction equations were developed from the experimental results under accurately controlled experimental conditions. Therefore, there may be difference if the estimated equations are directly applied to real buildings. Further research should be done on the generalization of the developed prediction equations.