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Development of Carbon-neutral Water-permeable Concrete using Ground Granulated Blast Furnace Slag
Yanchen Oinam(얀첸),Pyo, Sukhoon(표석훈),Shin, Myoungsu(신명수) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
Water permeable concrete or pervious concrete has been studied as an ideal water-permeable material to improve various environmental conditions. In this study, a series of experimental research has been conducted to evaluate the mechanical properties, porosity, permeability of permeable concrete using a ground granulated blast furnace slag (GGBFS) based cementless binder and binders partially replaced with GGBFS. Cementless permeable concrete with 12%, 16% of porosity, and 17 MPa, 16 MPa respectively of 7 days compressive strength was developed. For a fair comparison of permeability measurement ASTM C1701, EN 12697-19, and falling head permeability test methods were performed and provided with permeability results within the required range. A rheology test has also been performed to characterize all the paste of different flows to obtain a particular flow that can attain the target porosity without compromising the compressive strength of the concrete, which will be presented in the conference.
박성우(Park, Sungwoo),얀첸(Oinam, Yanchen),강민창(Kang, Minchang),표석훈(Pyo, Sukhoon) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
이 연구는 재료의 진부피 측정방법을 소개한다. 콘크리트 또는 시멘트 재료의 부피 및 밀도 측정을 위한 여러 방법이 개발됐으나, 각 방법은 단점들을 가지고 있다. 예를 들면, 물에 넣어 부피를 측정할 경우, 시편 내에서 화학물질이 추출되어 정확한 측정에 방해가 될 수 있다. 이러한 단점들을 극복하기 위하여 진공을 이용한 진부피 측정 기기를 개발하였으며 시멘트 재료들 성공적으로 측정할 수 있었다. This study introduces an lab-made volume measurement instrument using a vacuum pump. Several methods to measure the porosity of cementitious material such as porous concrete or foamed mortar. However, the previous test methods have some limits. To overcome their disadvantage, this paper proposes a lab-made volume measurement method. This method inherits the principle of a commercial gas pycnometer and results in reasonable results.