• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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• pp.250-251
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• 2017

In study, the lightweight insulation mortar is produced with more than 50,000tons of waste each year, but it is difficult to treat with the degradable composite material and the recycling ratio is still 50%. the lightweight insulation mortar is manufactured by using the ratio of expanded polystyrene and pulverized expanded polystyrene.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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• pp.684-687
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• 2004

The purpose of this study is to obtain basic data on the properties of the development of lightweight mortar contained foam agent for various applications in the field. In the experiment, as a result of measurement the specific gravity by the change of the W/C and the foam agent into a variable and measuring the compressive strength of mortar, specific gravity checked that a compressive strength therefore increased. Mortar is using lightweight foam agent having the change of specific gravity, the water cement ratio $50\%,\;40\%,\;30\%$. This paper present extensive data on the characteristics of strength of the lightweight mortar and also presents the mechanical characteristics of the lightweight according to specific gravity.

• 유기물자원화
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• 제26권1호
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• pp.39-45
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• 2018

FA(Fly ash)에 대해서는 연구가 활발히 진행되는 반면 BA(Bottom ash)의 연구실적은 많지 않으며, 특히 BA 재활용 분야의 연구가 절실히 요구된다. 따라서 본 연구에서 다공성인 건식(공랭식) BA를 연구대상으로 선택해 이를 재료로 활용하여 만든 BA 모르터와 일반 모르터를 비교 분석하여 BA 모르터의 경량 및 단열 특성을 알아보고자 하였다. BA의 경량성을 알아보기 위해 밀도 시험, 단위용적질량 시험, SEM 시험을 하였으며, 단열 시험을 위해 BA 모르터와 일반 모르터 몰드를 KS A 0006에서 정한 상온 상습의 환경조건에서 제작 후 항량이 될 때까지 온도 $105{\pm}2^{\circ}C$에서 건조하였다. 경량성 시험 결과 BA 모르터의 경량성은 일반 모르터의 0.72배로 일반 모르터에 비해 약 30%정도 가볍게 측정되어 BA를 건축물 재료로 활용할 경우 건축물 하중을 줄이는데 크게 기여할 것이다. 또한 단열 시험 결과 BA 모르터의 열전도율은 일반 모르터의 0.70배로 약 30%정도 단열성이 우수하다.

• Computers and Concrete
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• 제19권2호
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• pp.121-126
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• 2017

This paper presents the effect of aggregate type on high temperature resistance of self-compacting mortars (SCM) produced with normal and lightweight aggregates like expanded perlite and pumice. Silica fume (SF) and fly ash (FA) were used as mineral additives. Totally 13 different mixtures were designed according to the aggregate rates. Mini slump flow, mini V-funnel and viscometer tests were carried out on the fresh mortar. On the other hand, bulk density, porosity, water absorption and high temperature tests were made on the hardened SCM. After being heated to temperatures of 300, 600 and $900^{\circ}C$, respectively, the tensile strength in bending and compressive strength of mortars determined. As a result of the experiments, the increase in the use of lightweight aggregate increased total water absorption and porosity of mortars. It is observed that, the increment in the usage of lightweight aggregate decreased tensile strength in bending and compressive strengths of mortar specimens exposed to high temperatures but the usage of up to 10% expanded perlite in mortar increased the compressive strength of specimens exposed to $300^{\circ}C$.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1995년도 가을 학술발표회 논문집
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• pp.93-102
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• 1995

In this study the characteristics of adiabatic and lightweight of cement mortar was improved by using porous Bottom ash which was industrial waste. when a foaming agent was added, the characteristics of mortar using sand and Bottom ash were compared. From the empirical results the heat-transfer ratio for the mortar using Bottom ash only was shown the lower values than that for a general mortar, and the lightweight concrete with unit weight of 1.5t/$\textrm{m}^3$ could be made. When the foaming agent of 0.25% and 0.5% in usage of cement was added to that, the compressive strength scould be measured as 5 and 8times of the general mortar respectively. Also, the characteristics of adiabatic for that mortar was great improved so that the heat-transfer ratio was fallen to 0.172kcal/$mh^{\circ}C$.

• Computers and Concrete
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• 제19권2호
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• pp.217-226
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• 2017

This paper summarizes the results of experimental research, and artificial intelligence methods focused on determination of compressive strength of lightweight cement mortar with silica fume and fly ash after sulfate attack. The artificial neural network and the support vector machine were selected as artificial intelligence methods. Lightweight cement mortar mixtures containing silica fume and fly ash were prepared in this study. After specimens were cured in $20{\pm}2^{\circ}C$ waters for 28 days, the specimens were cured in different sulfate concentrations (0%, 1% $MgSO_4^{-2}$, 2% $MgSO_4^{-2}$, and 4% $MgSO_4^{-2}$ for 28, 60, 90, 120, 150, 180, 210 and 365 days. At the end of these curing periods, the compressive strengths of lightweight cement mortars were tested. The input variables for the artificial neural network and the support vector machine were selected as the amount of cement, the amount of fly ash, the amount of silica fumes, the amount of aggregates, the sulfate percentage, and the curing time. The compressive strength of the lightweight cement mortar was the output variable. The model results were compared with the experimental results. The best prediction results were obtained from the artificial neural network model with the Powell-Beale conjugate gradient backpropagation training algorithm.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.225-226
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• 2016

Bottom ash generated in thermoelectric power plants could be used as substitutional fine aggregate such as pearlite of fireproof mortar due to its lightweight and porosity. Development of substitutional materials is necessary because pearlite has several problems such as production of carbon dioxide during manufacturing process and high price. This study is to confirm the possibility of air cooling process bottom ash for fireproof mortar as substitutional material of pearlite through basic experiment.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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• pp.631-636
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• 2002

This study shows basic data for using as the structural lightweight aggregate. This will be the procedural method of recycling environmental close waste PET bottle lightweight aggregate(PBLA) that is rapidly increased the amount of production of waste PET bottle recently, the quality of developed PBLA and the fundamental properties by analyzing of mortar containing with PBLA. After experiment, the result shows the PBLA quality that have oven dry specific gravity of 1.39, unit volume weight of 844 kg/m$^3$ and absorption rate of 0% is satisfied with qualify regulation of lightweight aggregate. The flowability of mortar containing PBLA is increased maximum 16% with increasing mixing ratio of PBLA, however the compressive strength of mortar is decreased maximum 35% with increasing mixing ratio of PBLA.

• 한국강구조학회 논문집
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• 제16권4호통권71호
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• pp.397-406
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• 2004

본 논문은 경량형강으로 제작한 프레임에 경량기포모르터를 채운 경량합성벽체의 전단 거동에 대한 실험 결과와 전단 강도 및 강성 평가를 제시한 것이다. 경량기포모르터는 스틸하우스 벽체의 구조 성능 및 단열 성능의 향상과 마감에 대한 시공성 개선을 위해 도입되었다. 연구 결과 단열 성능에 대한 기여도는 낮으나, 경량기포모르터의 슬러리 비중이 0.8 이상인 경우 구조 성능의 향상과 마감성이 좋은 것으로 나타났다. 본 연구에서는 전단 거동에 미치는 경량기포모르터의 영향을 알아보기 위해 경량기포모르터의 비중(0.6, 0.8, 1.0, 1.2) 벽체의 스터드 배치간격(450mm, 600mm, 900mm), 마감재(경량기포모르터, OSB, 석고보드) 및 브레이싱 등을 변수로 한 14개의 경량합성벽체를 제작하였고 비교를 위해 대표적인 스틸하우스 벽체 3개를 제작하였다. 면내전단 실험결과, 경량기포모르터를 타설한 경량합성벽체가 기존의 스틸스터드 벽체에 비해 최대 내력은 1.15~5.38배, 초기강성은 1.45~13.7배 증가한 것으로 나타났다. 또한 벽체 내부의 스터드를 900mm까지 확장하여도 무리가 없는 것으로 나타났다. 그러나 이와 같은 결과는 건조수축 균열이 억제되지 않은 상태에서 나온 것으로 경량합성벽체의 내력을 향상시키기 위해서는 경량기포모르터의 초기 건조수축균열을 억제하고 스터드와 경량기포모르터 사이의 부착력을 확보하는 것이 무엇보다도 중요한 것으로 나타났다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.153-154
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• 2019

In this study, the fluidity and compressive strength of lightweight mortar using recycling water for pre-wetting of artificial lightweight aggregate were compared and analyzed to maximize the utilization of the recycling water, which is a by-product of the Ready-Mixed Concrete industry. For this purpose, the pre-wetting water was replaced with recycling water at the ratio of 0, 2.5, 5, 7.5 and 10%.