CO2 emitted from building materials and construction materials industry reaches about 67 million tons, which occupy about 30% of CO2 emitted from the construction field. Controls on the use of consumed fossil fuels and reduction of emission gases are essential for the reduction of CO2 in the construction area as we reduce the second and third curing to emit CO2 in the construction materials industry. Accordingly, this study applied the low energy curing admixture (hereinafter “LA”) to the extruded panels to observe the physical properties, depending on the mixing amount of fiber, type of fiber and mixing ratio of fiber. The type of fiber did not appear to be a main factor to affect strength, while the LA mixing ratio and mixing amount of fiber appeared to be major factors to affect strength. Especially, the highest strength was developed when the LA mixing ratio was 40%, whereas the test object with the mixing ratio of 50% resulted in the decrease of strength. In addition, it appeared that the mixing ratio of fiber greatly affected flexural strength and strength increased as the mixing ratio increased.

Carbon dioxide generated from construction materials and construction material industry among the fields ofconstruction is approximately 67million tons. It is about 30% of the carbon dioxide generated in the fields of construction.In order to reduce carbon dioxide in the fields of construction, it is necessary to control the use of fossil fuel consumedand decrease carbon emission by reducing the secondary and tertiary curing generating carbon dioxide in constructionmaterial industry. Therefore, this study produced an extrusion panel by using cement as the base materials and substitutingbinding materials up to 40% to analyze strength characteristics. According to the results of strength characteristics bythe replacement binder (Low energy curing Admixture) showed an apparent active strength improvement. In particular,specimens substituting binder as 45% indicated the greatest strength improvement. When binding materials was used withsubstitution, it showed strength characteristics similar or higher than specimens made from tertiary autoclave curing assecondary steam curing.

Carbon dioxide generated from construction materials and construction material industry among the fields ofconstruction is approximately 67 million tons. It is about 30% of the carbon dioxide generated in the fields of construction.In order to reduce carbon dioxide in the fields of construction, it is necessary to control the use of fossil fuel consumedand decrease carbon emission by reducing the secondary and tertiary curing generating carbon dioxide in constructionmaterial industry. Therefore, this study manufactured mortar by having cement as the base and substituting three bindingmaterials up to 50% and then adopted different curing methods to analyze congelation and strength characteristics. According to the result of strength characteristics by the types of binding materials and replacement ratio, the specimensubstituting ESA (Early Strength Admixture) and FPC (Fine Particle Cement) showed active strength improvement. Inparticular, the specimen substituting ESA as 25% indicated the greatest strength improvement, and as the number of curingincreased, the strength grew higher, too. And when the binding material was used by substitution, it showed strengthcharacteristics similar to or higher than the specimen conducting tertiary autoclave curing as the secondary steam curing.

국내의 건설폐기물 재활용 현황을 살펴보면 약 95%로 상당히 높게 조사되고 있지만 실제적으로는 처리업체에 일임하는 폐기물까지 모두 재활용으로 분류되기 때문에 실질적인 재활용률은 낮다. 그리고 다양한 성상이 혼재되어 배출되는 건설폐기물의 특성상 폐기물의 선별작업이 쉽지 않아 발생되는 폐기물의 대부분이 성토. 매립용으로 재활용되고 부가가치가 높은 부분에서의 재활용 실적은 매우 저조한 상황이다. 이에, 본 연구에서는 건설폐기물의 자원 재활용률을 제고하고자 불연성과 가연성이 혼재된 혼합건설폐기물을 단일 공정으로 성상별로 분리선별이 가능한 장치를 개발하였다. 기존의 건설폐기물 선별장치가 불연성과 가연성으로의 1차적인 분리선별 과정이 필요할 뿐만 아니라 불연성과 가연성으로 분리된 각각 성상에 대해서도 여러 공정을 필요로 하여 넓은 면적의 선별부지 확보를 위한 초기 투자 및 관리에 많은 비용이 소요되는 문제점이 있다. 그러나 본 연구에서 개발한 분리선별 장치는 기존의 불연성과 가연성에 각각 적용하던 기술을 복합화하여 하나의 공정만으로도 불연성과 폐목재 및 기타 가연성 폐기물으로 분리선별이 동시에 가능하게 하였다. 아울러 개발한 장치의 상용화를 위하여 수도권 내에 위치한 중간처리업체를 대상으로 현장 시험을 적용하여 장치의 효율성을 평가하여 보았다.

When manufacturing secondary concrete products, steam and autoclave curing are practiced for the purpose of securing product performance at early phase. CO2 is generated by combustion of fossil fuel at the time of curing. This study is part of a research conducted to minimize curing process which generates CO2. Combination materials types, substitution ratio, strength property per different types of curing are compared and evaluated. Result of the experiment indicates that combination material with 40%　blast furnace slag　substitution and W/B which has gone through 30,40% steam curing are the most outstanding experiment bodies.