• Title/Summary/Keyword: Waterproofing Admixture

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A Study on Watertightness Effect of Waterproofing Admixture Mixed Redispersible (재유화형 분말수지계와 규산질계 혼합형 구체방수재의 방수효과에 관한 연구)

  • 김무한;오상근;배기선;박선규;김용로
    • Journal of the Korea Concrete Institute
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    • v.12 no.3
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    • pp.39-46
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    • 2000
  • This study is to investigate the watertightness properties of waterproofing admixture mixed redispersible polymer and siliceous powder. Series I deals with change in micro-structure of mortar by waterproofing admixture according to the water/cement ratios of 0.5, 0.6, 0.7 and 0.8 Crystal growth in micro-structure was observed through SEM to estimate on the watertightness effect of it. SeriesII deals with watertightness properties of waterproofing admixture on water permeability coefficient, crack restoration capacity and carbonation depth. SeriesII deals with watertightness properties of waterproofing admixture on water permeability coefficient, crack restoration capacity and carbonation depth. The result of this study can be summarized as follows. 1) Fluidity of mortar and concrete was increased by adding waterproofing admixture. 2) From observation through SEM. Crystals grew larger and denser in micro-structure as fiberic crystalization. 3) Waterproofing admixture is good watertightness properties in a level of high water/cement ratios and long limit of time. 4) Crack restoration capacity was appeared and durability was progressed by waterproofing admixture.

Development of Self Waterproofing Admixture for Concrete Using Inorganic Admixture (무기질 혼화재를 이용한 콘크리트용 구체방수재의 개발)

  • 한천구;박상준
    • Journal of the Korea Concrete Institute
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    • v.13 no.6
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    • pp.527-535
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    • 2001
  • The watertight property of concrete was examined, that is affected by the sort of self waterproofing admixture and the change of the addition ratio of admixture. Various self waterproofing admixtures were made by changing the mixing ratio of silica fume, zinc stearate and silica sand. The result showed as follows. As the adding ratio of self waterproofing admixture increases, the fluidity is increased and the setting time is delayed. While compressive strength of concrete with self waterproofing admixture A which is currently using is increased until the adding ratio of self waterproofing admixture reached 18kg/㎥ and decreased over 24 kg/㎥, that with self waterproofing admixture B, C and D which are developed are higher than that of A. Absorption is decreased as the adding ratio of self waterproofing admixture and the increasing of age in concrete. Especially, when self waterproofing admixture has a lot of zinc stearate, absorption is decreased manifestly. The property of permeability is similar to that of absorption; permeability is decreased as the adding ratio of self waterproofing admixture and the increasing of age in concrete. Consequently, when the ratio of silica fume, zinc stearate and silica sand in self waterproofing admixture is 1 : 2 : 1 and addition ratio of self waterproofing admixture is 6kg/㎥, the high quality concrete is obtained comparing to the concrete with existent self waterproofing admixture.

An Experimental Study on Application of Waterproofing admixture of power (구체혼화용 분말방수재의 적용성에 관한 실험적 연구)

  • 곽규성;김원화;오상근
    • Proceedings of the Korea Concrete Institute Conference
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    • 1999.04a
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    • pp.83-88
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    • 1999
  • The purpose of this study is to offer the basic information of waterproofing admixture of powder for field application. Through before study and fly ash in mortar, Various properties as fly ash ratio in concrete were checked. According to the experimental result, it was shown that proper Waterproofing admixture of powder increased by cement weight in concrete was generally positive effect to flowing, compressive strength, suction ratio of water, length change ratio. So if Waterproofing admixture of powder is well done quality considered as good on application of concrete.

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An Experimental Study on Application of Waterproofing admixture of Powder (구체혼화용 분말방수재의 적용성에 관한 실험적 연구)

  • 강희권;송제영;오상근
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2004.05a
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    • pp.65-70
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    • 2004
  • The purpose of this study is to offer the basic information of waterproofing admixture of powder for field application. Through before study and fly ash in mortar, Various properties as fly ash ratio in concrete were checked. According to the experimental result, it was shown that proper Waterproofing admixture of powder increased by cement weight in concrete was generally positive effort to flowing, compressive strength, suction ratio of water, length of ratio. So if Waterproofing admixture of powder il well done quality considered as good in application of concrete.

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A Study on Quality Control of Waterproof Agent and Admixture of Cement for Concrete Surface Treatment (콘크리트 표면처리용 시멘트 액체방수제의 품질관리에 관한 연구)

  • 최은수;곽규성;배기선;오상근;안상덕
    • Proceedings of the Korea Concrete Institute Conference
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    • 2000.04a
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    • pp.181-188
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    • 2000
  • This study deals with the method of test for waterproof agent and admixture of cement, and especially, the effect in bond strength between waterproofing layer and mortar of concrete substrate in building construction. The purpose of this study is that it makes the estimation value of bond strength of concrete wall and anticorrosive when coated waterproof agent and admixture of cement as waterproofing materials for durability performance estimation depend on concrete watertighness.

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Self-Healing Performance of Concrete Using Admixture (구체방수 콘크리트의 균열 자가치유 성능)

  • Lee, Jong-Yun;Lee, Han-Joo;Lee, Yong-Jin
    • Journal of the Korean Society of Safety
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    • v.27 no.6
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    • pp.109-114
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    • 2012
  • This study is the things to experiment and evaluate the performance of self-healing water-proofing on the concrete to be using the crystal growth composite waterproofing admixture. The cylinder to be making on the concrete by ${\varnothing}150{\times}300$ mm for evaluating the performance of self-healing water-proofing was aging 90 days and cut on a 50 mm. So, it prompted the crack and applied. After it measured the quantity of water to be flow the water throughout the crack part of the cylinder, it applied the basic formular of Darcy's law and calculated the coefficient of water permeability. So, it verified the performance of self-healing water-proofing on the basis of the changing shape of the water permeability. This experiment is the thing to be applied the general evaluation of the structure to demand the real watertightness on doing for the evaluating of performance of the quantity of water leak and self-healing water-proofing about the various penetration crack.

A Study on Anti-Corrosion Effect of Powder Self Water Proof Admixture Mixed Corrosion Inhibitor for Reinforcing Steel (철근부식억제형 구체방수재의 방청효과에 관한 연구)

  • 신도철;손형호;김원화
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.10a
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    • pp.409-414
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    • 2002
  • This study is intended to develop the self water proof admixture for durability concrete by anti-corrosion inhibitor. Chloride induced corrosion of reinforcement is one of the main factor which cause the deterioration of concrete structure. When the substitute anti-corrosion agents for a part of self waterproofing agent, the corrosion-proof increases for the increased water proofing capacity. And proper self waterproofing agent by cement weight in concrete was generally positive effect to concrete compressive strength, slump, freezing and thawing resistance. Also, permeability and absorption show a straight decrease when self waterproofing agent is added.

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A Study on the Flexural Rigidity Change according to Quantities Characteristics of Waterproof Admixture for Concrete (콘크리트용 수밀 혼화재 첨가량에 따른 휨 강도 변화추이 연구)

  • Choi, Su-Young;Park, Jin-Sang;Kim, Dong-Bum;Park, Wan-Goo;Kim, Byoung-Il;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.11a
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    • pp.128-129
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    • 2017
  • Concrete properties alone cannot provide satisfactory waterproof performance because concrete can generate cracks due to possible problems in design, construction and curing process, and various environmental factors. Therefore, concrete structures require installing waterproofing layers for concrete protection and various types of construction methods are currently being applied. The purpose of this study is to investigate the concrete strength changes when waterproofing admixtures are mixed into the concrete. The results of flexural strength testing confirmed that the initial strength of concrete specimens with the admixtures was lower than that of the concrete specimen without the admixture based on different curing periods.

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A Study on the Properties of Concrete Mixed with Pozzolan Inorganic Polymer(PIP) Waterproof Admixture (인공 무기계 구체방수재를 혼입한 콘크리트의 물성에 관한 연구)

  • Chung, Jee-Seung;Shin, Hwa-Cheol;Kim, Jin-Gu
    • Journal of the Korean Society of Safety
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    • v.31 no.4
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    • pp.82-89
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    • 2016
  • In this paper, various of experiments were performed for checking the usefulness of Pozzolan Inorganic Polymer(PIP) Waterproof Admixture. The results of the experiment enabled to set the optimum mixture ratio of PIP waterproof admixture as 3.5%. Then, the test specimen mixed with PIP waterproof admixture was produced and consider whether meeting the quality standard of waterproofing admixture for concrete (KS F 4926) From the results, all the items such as mechanical properties and durability were meet the quality standard of KS. The PIP waterproof admixture concrete shows the high resistance of absorption, permeability and chloride ion penetration thanks to its internal components such as siliceous powder, zinc stearate and dispersive polymer.

Evaluation on the Material Properties of Waterproof Concrete with Self-healing Admixture (자가치유형 구체방수 콘크리트의 기초물성 평가)

  • Jeon, Hong-Mim;Lee, Jong-Yun;Hong, Seok-Beom;Kim, Jin-Keun;Lee, Yong-Jin
    • Proceedings of the Korea Concrete Institute Conference
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    • 2009.05a
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    • pp.415-416
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    • 2009
  • Concrete with Self-healing Admixture provides waterproof protection by using a organic-inorganic chemical compound throughout the concrete. Using cement chemicals eliminate the need to use additional waterproofing, If crack is occurred, this system enhance self-healing ability to increase the structural safety. In this study, we investigate material properties to conclude mixture rate of concrete to apply a construction site.

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