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.

Environmental problems caused by the occurrence of carbon dioxide are recognized as a critical issue throughout the world. As a result, a measure for the use of cement and improvement of its quality must be sought out. In order to reduce the occurrence of carbon dioxide during the manufacturing process of cement, this study creates an alkali-activated slag cement that utilizes ground granulated blast furnace slag, an industrial by-product, and substitutes metakaolin as an alternative for silica fume to improve the process of manufacturing high-strength concrete and its quality. The study discerns the mechanical characteristics by measuring the flexibility and compressive strength through the mortar matrix and discerns the durability by conducting an acid resistance test and chloride ion penetration resistance test. Also, the study discerns the hydration products through an XRD test. Based on the results of such tests, it is anticipated that it may be used as a secondary product for concrete or buildings that require superior long-term strength and durability compared to regular Portland cement. However, as no clear results were found in this study regarding the substitution of metakaolin, it displayed mixed results in comparison to previous studies. Nevertheless, it is expected that metakaolin will become a more superior admixture if its issues are improved through continuous research studies.

This study was experimented by reviewing the possibility of applying non-sintered loess as a building material. Andthis study was to evaluate and compare flexural and compressive strengths characteristics of cementless mortar with non-sintered loess according to percentage of non-sintered loess and the type of curing without adding any cement. SEM,chloride ion penetration resistance and chemical resistance were also evaluated and compared to study characteristics ofcementless mortar with non-sintered loess. In order to evaluate the characteristics of cementless mortar with non-sinteredLoess. Test pieces were fabricated at 3, 7 and 28 days depending on the percentage of non-sintered loess and the typeof curing. And also normal portland cement mortar were fabricated to compare with cementless mortar with non-sinteredloess. The result of this study, Properties of cementless mortar with non-sintered loess strength are generally lower thannormal portland cement mortar. However cementless mortar with non-sintered loess which is mixed 20% show equallyas normal portland cement mortar. Also, cementless mortar with non-sintered loess show excellent results than normalportland cement mortar in the durability characteristics. The purpose of this study was to expand the utilizable scope ofnon-sintered loess and to use the basic data as a applying building material in the future.

시멘트 모르타르 및 콘크리트는 재료를 비교적 쉽게 구할 수 있고 형상가공이 용이하고, 압축력과 내구성 우수, 안정한 구조물의 시공이 가능한 장점을 가지고 있어 건축재료로서 가장 널리 사용되고 있다. 그러나 휨 및 인장강도, 접착성, 내약품성 등이 약한 결점을 가지고 있어 이를 보완하기위한 연구들이 진행되고 있으며, 폐기물을 이용한 에코시멘트, 고기능성 시멘트, 강도와 내구성이 뛰어난 시멘트의 개발을 시도하고 있다. 국내에서는 산업부산물을 활용한 무기결합재에 관한 연구는 아직 미미한 상태이며, 대학, 연구소 및 시멘트 업계를 중심으로 산업부산물 10 ~ 40%를 치환 사용하는 혼합시멘트에 관한 연구가 수행되어져 왔다. 본 연구에서는 국내의 K사에서 생산되는 SBR폴리머를 사용하여 제작한 비소성 무기결합재 폴리머와 폴리머를 사용하지 않은 보통 시멘트 모르타르와의 강도특성에 대한 비교 시험을 실시하였다. 본 논문의 연구 내용은 다음과 같다. 1) 실험방법 1종류의 액상 폴리머를 사용하여 비소성 무기결합재 폴리머 비를 5%, 10%, 15%, 20%로 달리하여 제작한 비소성 무기 결합재 폴리머의 물성 비교를 위해 플로우를 170±5 mm로 유지하여 일정한 작업성을 확보 하였다. 이와 같이 제조한 비소성 무기 결합재 폴리머의 휨강도, 압축강도에 대해 28일 강도를 측정하여 보통 시멘트 모르타르와 비교하였다. 2) 비소성 무기 결합재 폴리머의 휨강도 및 압축강도 특성 비소성 무기 결합재 폴리머의 휨강도 및 압축강도는 보통 시멘트 모르타르와 비교하여 개선되는 모습을 나타냈다. 강도는 폴리머 함유랑의 증가에 따라 꾸준히 증가하였으며, A와 B는 폴리머 무기결합재 비 15%에서 최대값을 나타내고 있고, C는 무기결합재는 20%에서 최대값을 나타냈다. 압축강도도 휨강도와 마찬가지로 비소성 무기 결합재폴리머의 성능이 보통 시멘트 모르타르의 압축강도에 비해 개선되었다. 세 종류의 무기결합재 모두 폴리머 시멘트 비 15%에서 최대값을 나타냈다.

This study aims to develop solidifying agents of sewage sludge using industrial By-Products and evaluate applicability of the solidified sewage sludge. The result of this study shows that it was possible to reduce water content of the cover materials to more than 50% in a short time as a result of the excellent hygroscopic function of inorganic binder made from industrial by-products and the granulation of sludge. The result suggests that the appropriate mixed ratio of (PSA + CPA) − (GBFS + SM1) − (SAS + SM2) is 60-25-15, and input ratio of solidifying agent is 48%, considering the applicability of the facilities, including mixing performance and availability of discharge, as well as the percentage of moisture content of the solidified sewage sludge, pH, and exothermic temperature. The solidified sewage sludge made using industrial by-products met more than the standard of unconfined compressive strength 0.5 kg/cm2 (as for cover materials 0.1 MPa) in 7 days due to ground granulated blast furnace slag, high-calcium fly ash, and SAS. As a result, valid resource recovery is possible through the land treatment of sewage sludge by inducing in-situ stabilization of heavy metals and property strengths through the reactivity of industrial by-products.