• 한국안전학회지
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• 제31권4호
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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.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
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• pp.89-92
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• 1999

The purpose of this study is to evaluate the capability to use with cement admixture materials because Paper Sludge Ash consists of Si, Ca and Al which are chief content in Pozzolan. For the derivation of Pozzolanic reaction in Paper Sludge Ash, it is measured compressive strength on cement mortar which is replaced mixing of Paper Sludge Ash and inorganic admixture ; ie, gypsum, lime and slaked lime, regularly. In the result of test, the strength decrease remarkably when cement is only replaced with Paper Sludge Ash, but the strength is almost equal when cement is replaced with Paper Sludge Ash is mixed with inorganic admixture material in proportions of 5~15%. Consequently, It is possible to use Paper Sluge Ash with admixture materials of cement.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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• pp.967-974
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• 2000

By testing compressive strength, water absorption and water premeablity, to establish the standard of quality of waterproofing admixture of power type for concrete, we propose guide line as following ; $.$Setting time: more than 1 hour, within 10 hours $.$Slump: To be satisfied with request of user $.$Air content: To be satisfied with request of user $.$Safety: Without crack or deformation $.$Ratio of compressive strength: $\circled1$ At 3 days : more than plain specimen by 0.9 (An inorganic material) more than plain specimen by 0.4 (An inorganic material mixed organic) $\circled2$ At 7, 28 days : more than plain specimen by 1.0 $.$Ratio of water absorption Coefficient: $\circled1$An inorganic material: less than plain specimen by 1.0 $\circled2$ An inorganic material mixed organic : under than plain specimen by 0.8 $.$Ratio of water premeablity : $\circled1$ An inorganic material : less than plain specimen by 1.0 $\circled2$ An inorganic material mixed organic : under than plain specimen by 0.8

• 한국세라믹학회지
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• 제37권6호
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• pp.576-582
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• 2000

Two type of expanding cement generally referred to as CSA with Hauyne(3CaO 3Al2O3 CaSO4) and Quick lime(CaO). Hauyne is formed to ettringite when there are presented with CaO and CaSO4, and CaO reacts wtih water to form Ca(OH)2. REcently, the mechanism of compensation and expand mortar or concrete tend to same and it has been used improving on its shrink property. The volume of cement paste varies with its water content shrink with drying and re-wetting. Concrete and mortar works are required shrinking compensation and expansion properties to reduce of potential crack. The use of expansion cement may improve on its shrinking volume changes. CSA dosages for shrinking compensation limited by cement weight, but obtained difference expansion rate with varied W/C or inorganic admixture. This paper studies expansion rate according to expansion cement dosages, water and inorganic admixtures as Silica fume. Therefor, the expansion factor has to considered before the application.

• 콘크리트학회논문집
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• 제13권6호
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• pp.527-535
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• 2001

SF, ZS 및 SS의 혼합비율을 변화시켜 제조한 구체방수재를 대상으로, 방수재의 종류 및 첨가량에 따른 굳지 않은 콘크리트 및 경화콘크리트의 수밀특성을 분석한 결과는 다음과 같다. 구체방수재의 첨가량이 증가할수록 유동성은 증가하였으며, 응결시간은 지연되었다. 경화상태 압축강도는 기존 제품인 A의 경우, 방수재 첨가량 183kg/㎥까지는 증가하나, 그 이후 24kg/㎥에서는 감소하는 것으로 나타났으며, 시제작품인 B, C, D의 경우는 기존 구체방수재인 A에 비해 높은 강도특성이 있는 것으로 나타났다. 또한, 흡수량은 구체방수재 혼입량이 증가하고, 재령이 경과할수록 적어지는 것으로 나타났는데 특히, ZS의 첨가량이 많은 방수재 일수록 크게 낮아지는 것으로 나타났다. 투수량은 흡수량과 유사한 경향으로, 방수재 첨가량이 증가하고, 재령이 경과할수록 감소하는 등의 특성을 나타내고 있었다. 이상을 종합하여 볼 때 시제작품으로 가정한 SF : ZS : SS의 혼합비가 1 : 2 : 1이고, 혼입량이 63kg/㎥인 조건이면 기존 구체방수재보다 우수한 품질의 수밀콘크리트를 제조할 수 있는 것으로 판단되었다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 가을 학술발표회 논문집(I)
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• pp.139-144
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• 1998

This study is intended to devolop the self waterproof agents for high performance concrete by analyzing the properties of fresh and hardened mortar with various addition ratios of the inorganic admixture and zinc stearate. As the results of the test, the flow and air content increase with the addition of expansive additives. When the replacement rate of silica fume increases, the flow decreases for the increased viscidity. And the flow and sir content decrease with the addition of zinc stearate. At hardened state, the compressive strength, tensile strength and flexual strength decrease with the addition of expansive additives and zinc stearate. With the increase of silica fume's replacement, they show a little decrease at early age and then increase gradually. Also, absorption and permeability show a steep decrease when zinc stearate is added, and a slack decrease with the replacement of silica fume.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1995년도 가을 학술발표회 논문집
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• pp.103-107
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• 1995

The intention of this study is to reduce the drying shrinkage of the cement mortar using the shrinkage reducing agent and the inorganic admixture. In this experiment the drying shrinkage strain, rate of weight loss and strength have been measured depending on age using the motar specimen. The result show that the usage of shrinkage reducing agent up to 1.5% will give an effect of approximately 30% without loss of strength, and the efficiency will increase together with the inorganic admixture. Also, as the amount of shrinkage reducing agent increases, the rate of weight loss increases. Drying shrinkage reduces at the same rate of weight loss.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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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.

• 한국건설순환자원학회논문집
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• 제2권3호
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• pp.180-187
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• 2014

본 연구에서는 시멘트 사용량을 저감하고 다량의 혼화재를 사용하여 고강도 콘크리트 제조 과정에서 시멘트에 의한 $CO_2$ 발생량을 감소시킬 목적으로 혼화재 및 무기계 자극제를 사용한 고강도 콘크리트의 역학적 특성을 평가하였으며, HVMA 결합재 도출과 W/B 변화 및 양생온도에 따른 HVMA 고강도 콘크리트를 실험하였다. 실험결과, 다량의 혼화재와 무기계 자극제인 열병합애시와 무수석고를 혼합 사용한 HVMA 결합재 배합을 설계하였으며, 설계된 HVMA 결합재를 사용할 경우 W/B 26% 수준에서 HVMA 고강도 콘크리트 배합이 유동특성과 역학적 특성이 양호한 것으로 나타났다. 또한 HVMA 결합재를 사용한 고강도 콘크리트의 양생온도 영향을 검토한 결과, 양생온도 $20^{\circ}C$ 이상 확보한 경우에는 50MPa 이상의 고강도 HVMA 고강도 콘크리트 제조가 실용화 가능성이 높은 것으로 나타났다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 추계 학술발표회 제17권2호
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• pp.359-362
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• 2005

This study was performed to know the properties and estimation of field application of concrete(Bluecon) using fluosilicate salt based admixture made from by-product during phosphoric acid manufacturing process. Mix proportions for experiment were modulated at 0.45 of water-binder ratio and $0.5-2.0\%$ of adding ratio of fluosilicate salt based inorganic compound. Evaluation for Field application of concrete was carried out batch plant test at remicon factory and building construction. According to results. it was found that slump of concrete(Bluecon) using fluosilicate salt based admixture is higher about 10 to 20 mm than plain concrete, and air content is similar to each other. And the water permeability and crack of bluecon is lower than that of plain concrete.