산업부산물을 이용한 비소성 시멘트 모르타르의 프리캐스트콘크리트 제품 적용성 평가

나형원 ( Na Hyeong-won ),문경주 ( Moon Kyoung-ju ),형원길 ( Hyung Won-gil ) 한국건축시공학회 2020 한국건축시공학회지 Vol.20 No.1

This study aimed to develop non-sintered cement that could replace portland cement which emits large amount of carbon dioxide during firing process. For this purpose, ground granulated blast furnace slag, type c fly ash and slaked lime were used. In addition, through the experimental results, the characteristics of the non-sintered cement binders according to the mixing ratios will be identified, and the utilization plans for the precast concrete products will be presented. In this experiment, non-sintered cement binders using industrial by-products were prepared to compare the flexural strength and compressive strength of each of the 3, 7 and 28 days. As a result, the results satisfy the KS of the target product proposed in this study. Therefore, this study presents the possibility of using precast concrete products by developing non-sintered cement binders using industrial by-products.

비활성 황토를 이용한 비소성 시멘트 모르타르의 기초물성

이창윤 ( Chang-yun Lee ),김지훈 ( Ji-hoon Kim ),형원길 ( Won-gil Hyung ) 한국폐기물자원순환학회 2019 한국폐기물자원순환학회지 Vol.36 No.1

Globally, there are environmental problems due to greenhouse gas emissions. CO₂ emission rates of the cement industry are very large, but the demand for cement will continue in the future. In this study, in order to reduce the environmental impacts of CO₂ emissions from cement production, experiments were carried out for the development of non-sintered cement (i.e. that which has not undergone firing or burning) from granulated ground blast furnace slag, high calcium fly ash, and non-activated hwangto (also not having undergone firing or burning). An experiment was conducted by dry curing and a flow test with fixed water to binder ratio. We observed the mechanical properties for the measurement of flexural· compressive strength by mortar, and tested chemical properties such as water absorption, pH, and carbonation. We compared these mechanical and chemical properties to those of ordinary portland cement applicable to construction sites. In the future, through continued research, this will be expected to reduce the effect of environmental loading and to be economically excellent.

친환경 무기결합재를 이용한 모르타르의 SBR폴리머 혼화특성

허준오,조정규,박인욱,형원길 한국폐기물자원순환학회 2017 한국폐기물자원순환학회지 Vol.34 No.5

Even though cement a major foundational ingredient in modern architecture, it is known to destroy the environment due to its high energy consumption and how its production releases large amounts of carbon dioxide. To address this situation, the cement industry has proceeded to study how to reduce the amount of CO2 released and has recently started developing unused non-sintered cement. Inaddition, studies are in active development for cement that has not gone through the burning process. If it is possible to make cement using blast furnace slag and industry outgrowth without the use of clinker, it can be expected to help when running out of limestone and to mitigate the pollution problem through CO2 emissions. This study apprehended the measurement of kinematical characteristics through measuring polymer nonsintered cement flexural and compressive strength and analyzing the pH · Cl− Penetration Depth characteristic, through the SEM test also analyzes the reaction of the hydration mechanism, the result of decrementing the water/cement ratio, and entrained air contents from the mixing of polymer, and conducts that durability test for the absorption rate and carbonation experiments. The results of experimentation show excellent chemical and mechanical properties compared to ordinary Portland cement.

무기계 산업폐기물을 활용한 비소성 시멘트의 제조시 품질 안정성 확보를 위한 화학성분 계수의 활용성

소승영,문경주,형원길,주홍신,박원춘,소양섭 한국폐기물자원순환학회 2008 한국폐기물자원순환학회지 Vol.25 No.7

This study aims to manufacture non-sintering cement (NSC) by adding phosphogypsum (PG) and waste lime (WL) to granulated blast furnace slag (GBFS) as sulfate and alkali activators. This study also investigates the applicability of oxide componential coefficient for quality safety by chemical analyses in manufacturing of non-sintering cement according to various mixing ratio. Results obtained from this study have shown that the hydraulic modulus, lime saturation degree, CaO/SiO₂, and (CaO + Al₂O₃ + SO₃)/SiO₂could be used for quality safety of non-sintering cement.

비활성 황토의 치환율에 따른 비소성 시멘트 모르타르의 내산성 및 성분 분석

이창윤 ( Chang-yun Lee ),김지훈 ( Ji-hoon Kim ),형원길 ( Won-gil Hyung ) 한국폐기물자원순환학회 2019 한국폐기물자원순환학회지 Vol.36 No.2

Globally, there are environmental problems because of greenhouse gas emissions. The CO₂ emissions rate of the cement industry is very huge, and a continued demand for cement is anticipated. In order to reduce the environmental impact of CO₂ emissions from cement production, this study conducted experiments for the development of non-sintered cement (that has not undergone firing or burning) using granulated ground-blast furnace slag, high-calcium fly ash, and nonactivated hwangto (that has also not undergone firing burning). One experiment used acid resistance and a pH test due to durability, and it conducted a component analysis for the measurement of crystalline analysis and a scanning electron microscope at the mortar. From the experimental results, the mechanical and chemical properties were compared with those of ordinary Portland cement for applicability to construction sites. In the future, to solve the problem through continued research, it will be necessary to reduce cement’s environmental load and involve an economic analysis.

비소성시멘트를 사용한 모르터의 물리적 특성에 관한 기초적연구

김한식 ( Han-sic Kim ),최맹기 ( Maeng-ki Choi ),한다희 ( Da-hee Han ),박희곤 ( Hee-gon Park ),백민수 ( Min-su Paik ),정상진 ( Sang-jin Jung ) 한국건축시공학회 2005 한국건축시공학회 학술발표대회 논문집 Vol.5 No.2

The world``s cement demand is anticipated to increase about 2.558% every year until the first half of the 21st century. To be closed the increase of cenment damand and simultaneously comply with the Kyoto Protocal, cement that gives dioxide(Co2) discharge should be urgently develop. If cement can be manufactured with industrial byproducts such as granulated blast furnace slag(GBFS), phosphogypsum(PG), and waste lime(WL) instead of clinker as its counterproposal, there would be many advantages including maximum use of these industrial byproducts for high value-added resources, conservation of natural resources and energy by omitting use of the clinker, minimized environmental pollution problems caused by Co2discharge and reduction of the cost. So this study aims to solve the problems by manufacturing non-sintered cement.

고칼슘 소각재 치환율에 따른 비소성 시멘트 모르타르의 특성

강경모,형원길 한국폐기물자원순환학회 2020 한국폐기물자원순환학회지 Vol.37 No.3

In this study, certain portions of non-sintered cement mortar were replaced with industrial subsidiary high-calcium flyash (HCFA) and fly ash (FA) to reduce CO2 emissions. After fixing the ratio of FA to 30%, 20%, 30%, 40% of HCFAwas added to produce mixed cement. We conducted a through-flow test, strength experiment, absorption test, neutralizationtest, XRD analysis, and SEM scanning to identify the physical characteristics of HCFA and determine its applicabilityas cement. Our results showed that a higher proportion of HCFA in non-sintered cement mortar resulted in higher W/Band absorption rates and lower strength and neutralization resistance. Our findings confirm that non-sintered cement mortaris applicable in secondary PC product areas where rebars are not used and where long-term stability or high strength isnot required (particularly at the beginning of construction). 없음

비소성 시멘트의 활성황토 치환에 따른 모르타르의 특성 변화

김무준 ( Moo-joon Kim ),문경주 ( Kyoung-ju Mun ),형원길 ( Won-gil Hyung ) 한국폐기물자원순환학회 2020 한국폐기물자원순환학회지 Vol.37 No.2

In construction sectors, activities using cement emit a significant amount of carbon dioxide accounting for approximately 30% of global CO₂ emissions. Therefore, the use of cement in construction sectors needs to be reduced in order to reduce CO₂ emissions. In this regard, herein the properties of non-sintered cement mortar made with ground granulated blast furnace slag, high calcium fly ash, and activated Hwangto were characterized to find proper eco-friendly replacement of cement. Flow test results of non-sintered cement mortar indicated a tendency for water/binder ratio is increased with the rate of adding activated Hwangto. When activated Hwangto was added, flexural and compressive strength was 20% (HFAH-20). Absorption rates was also increased with the addition of activated Hwangto. The neutralization test showed that the nonsintered cement mortar made with activated Hwangto is responded. X-ray diffraction analysis showed that as activated Hwangto is added, stratlingite was increased but Ca(OH)₂ was decreased. Through scanning electron microscope analysis, a small amount of ettringite and calcium-silicate-hydrate gels was found, but no plate-like Ca(OH)₂ were observed.

나노슬래그와 알칼리 자극제를 활용한 비소성 시멘트 모르타르에 관한 연구

정성욱,임남기 한국건축시공학회 2010 한국건축시공학회지 Vol.10 No.6

As global warming has had harmful effects on the environment, the construction industry has made efforts to reduce the amount of CO2 generated in the process of cement production. There is an urgent need for an alternative material that can replace cement. To improve the initial strength and economical efficiency pointed out as problems,this research was conducted for Blast Furnace Slag (BFS), an industrial byproduct. Non-sintering cement (NSC) was used by minimizing the amount of high-priced alkali activators. By using Nano-technology, fineness has been maximized, to enhance the initial strength of BFS. This research is based on non-sintered cement replaced by nano-slag using alkali activators, and the fundamental properties and quality of the non-sintered cement were investigated. A variety of activators were used, up to 10 percent of the slag weight. This research aims to present fundamental data through a comparative analysis of flexural strength, compressive strength, time of setting, diabetic temperature, and rising heat. 현재 지구촌 온난화에 의하여 환경이 열악해지고 있으며 그에 따라 건설분야에도 시멘트 제조에 따른 CO2발생 저감하기위한 노력을 하고 있다. 이에 시멘트 대체할 재료가 필요하다. 본 연구에서는 기존 비소성 시멘트의 문제점으로 지적 되는경제성 및 초기강도 확보를 위해 산업부산물인 고로슬래그를대상으로 연구를 진행하였으며 고가의 알칼리 자극제량을 최소화함으로서 실용화 가능한 비소성 시멘트 기술을 진행하고자 한다. 그리고 NT를 사용하여 분말도를 최대화 하여 고로슬래그의 초기강도를 개선시켰다. 본 연구는 알칼리 자극제를 사용한 나로슬래그를 치환한 비소성시멘트를 기초로 하고 있으며, 현장에서 사용가능한 비소성시멘트의 기초적 물성 및 품질을 조사하였다. 여러 자극제가 슬래그 중량의 10%로 사용되었으며 휨강도, 압축강도, 응결시간, 단열온도, 상승열등을비교 분석하였으며 그 기초적 자료를 제시하는데 목적이 있다.

비소성 시멘트의 제조시 푸질 안정성 확보를 위한 화학성분 계수의 활용성

문경주,소양섭 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

In this study, non-sintering cement is produced by only blending granulate blast furnace slag with phosphogypsum as main materials, and small amounts of hydrate lime or waste lime as activators. This paper was investigated applicability of oxide componential coefficient for quality safety by chemical analyses in manufacturing of non-sintering cement according to various mixing ratio. Results obtained from this study have shown that the hydraulic modulus, lime saturation degree, CaO/SiO₂, and (CaO+Al₂O₃+SO₃)/SiO₂ could be used for quality safety of non-sintering cement.