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A platform for research: civil engineering, architecture and urbanism
Steel reinforced post-filling coarse aggregate concrete columns under eccentric compression
Highlights 1. Eccentric compression of post filling coarse aggregate concrete columns was studied. 2. The optimal post filling ratio of coarse aggregate is 20% based on test results. 3. The ultimate loading carrying capacity of column specimens reached the highest at 20% post-filling ratio. 4. As the eccentricity increases, the ultimate load-carrying capacities of PFCC columns decrease.
Abstract Post-filling coarse aggregate concrete (PFCC) is a new type of environmental friendly concrete. The increase of coarse aggregate content could decrease the shrinkage of concrete, reduces the consumption of cement in concrete production, reduce the carbon dioxide emission to the environment and saves energy. In this study, the mixture proportions of PFCC for C50 grade concrete strength was designed and the performances of compressive strength and elastic modulus were conducted experimentally. Then, ten reinforced concrete columns made by PFCC with different post-filling ratios (PFR) and eccentricity of load were designed and tested. The failure mode, load–deflection curve, ductility and ultimate loading capacity were analyzed and elaborated. The same failure modes as conventional concrete columns were observed in PFCC columns. Test results indicated that the compressive strength and elastic modulus of the post-filling coarse aggregate concrete were improved, which reached the highest when the post-filling ratio is 20%. At the same time, the ultimate loading carrying capacity of column specimens reached the highest at 20% post-filling ratio for both small eccentricity and large eccentricity specimens. Results also demonstrated that the as the eccentricity increases, the ultimate load-carrying capacities decreases. This study provides references and research data for technical regulations and design specifications of compression structural members made of post-filling coarse aggregate concrete.
Steel reinforced post-filling coarse aggregate concrete columns under eccentric compression
Highlights 1. Eccentric compression of post filling coarse aggregate concrete columns was studied. 2. The optimal post filling ratio of coarse aggregate is 20% based on test results. 3. The ultimate loading carrying capacity of column specimens reached the highest at 20% post-filling ratio. 4. As the eccentricity increases, the ultimate load-carrying capacities of PFCC columns decrease.
Abstract Post-filling coarse aggregate concrete (PFCC) is a new type of environmental friendly concrete. The increase of coarse aggregate content could decrease the shrinkage of concrete, reduces the consumption of cement in concrete production, reduce the carbon dioxide emission to the environment and saves energy. In this study, the mixture proportions of PFCC for C50 grade concrete strength was designed and the performances of compressive strength and elastic modulus were conducted experimentally. Then, ten reinforced concrete columns made by PFCC with different post-filling ratios (PFR) and eccentricity of load were designed and tested. The failure mode, load–deflection curve, ductility and ultimate loading capacity were analyzed and elaborated. The same failure modes as conventional concrete columns were observed in PFCC columns. Test results indicated that the compressive strength and elastic modulus of the post-filling coarse aggregate concrete were improved, which reached the highest when the post-filling ratio is 20%. At the same time, the ultimate loading carrying capacity of column specimens reached the highest at 20% post-filling ratio for both small eccentricity and large eccentricity specimens. Results also demonstrated that the as the eccentricity increases, the ultimate load-carrying capacities decreases. This study provides references and research data for technical regulations and design specifications of compression structural members made of post-filling coarse aggregate concrete.
Steel reinforced post-filling coarse aggregate concrete columns under eccentric compression
Cao, Qi (author) / Jia, Jinqing (author) / Zhang, Lihua (author) / Ye, Hao (author)
2020-10-20
Article (Journal)
Electronic Resource
English
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