Author
Youjun Xie
Bio: Youjun Xie is an academic researcher from Central South University. The author has contributed to research in topics: Cement & Materials science. The author has an hindex of 24, co-authored 120 publications receiving 1752 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the relationship between mixing proportion parameters of self-compacting concrete (SCC) and its environmental impact was analyzed and three simple indices combining the embodied environmental impacts with engineering properties (such as strength) of SCC were proposed.
168 citations
TL;DR: In this paper, the preparation technology of high-strength self-compacting concrete (SCC) containing ultrapulverized fly ash (UPFA) and superplasticizer (SP) was presented.
136 citations
TL;DR: In this article, the influence of steam curing on the compressive strength of concrete containing UFA with or without slag was presented. And the experimental results indicated that the concrete with UFA has low early strength after 13-h steam curing and that the difference between the 28-day compressive strong of concrete through 13h steam cured and that of moist-cured concrete is large, but the concrete having UFA and CaSO4 or Ca(OH)2 has a high early strength.
129 citations
TL;DR: In this paper, the effects of powder activators on the properties, microstructure and environmental impact of one-part geopolymer by measuring and characterizing compressive strength, porosity, reaction heat release, and carbon dioxide equivalent (CO2-e) emission.
120 citations
TL;DR: In this article, the Na2CO3 was used to replace a portion of Na2SiO3-anhydrous, and the properties of one-part geopolymer with composite activators were investigated systematically.
120 citations
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01 Jan 2016
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1,701 citations
TL;DR: In this article, a self-compacting concrete (SCC) mixture was replaced with a Class C fly ash (FA) in various proportions from 30% to 60% and the results showed that 10% silica fume (SF) added to the mixture positively affected both fresh and hardened properties of high-performance high-volume FA SCC.
325 citations
TL;DR: In this paper, a durability-based multi-objective optimization of the mixtures were performed to achieve an optimal concrete mixture proportioning, and the results indicated that when the durability properties of the concretes were taken into account, the ternary use of S and SF provided the best performance.
319 citations
TL;DR: In this paper, the authors present a review of the potential and challenge of using recycled concrete aggregate (RCA) as the substitute for natural aggregate (NA) in concrete mixtures.
Abstract: This manuscript presents a review of the potential and challenge of using recycled concrete aggregate (RCA) as the substitute for natural aggregate (NA) in concrete mixtures. Using RCA in concrete preserves the environment by reducing the need for opening new aggregate quarries and decreases the amount of construction waste that goes into landfill. The properties of RCA such as specific gravity, absorption, and the amount of contaminant present in it contribute to the strength and durability of concrete. The quality of RCA depends on the features of the original aggregate and the condition of the demolished concrete. Some researchers have reported that the use of RCA degrades concrete properties while others have successfully produced RCA concrete with a performance that matched normal concrete (NC). In addition to the influence of RCA to concrete properties, this paper also evaluates multiple techniques to improve the performance of RCA concrete, reported cost savings in concrete production and recommendations regarding the application of RCA in concrete.
318 citations