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논문 기본 정보

자료유형
학술저널
저자정보
Yin Liu (Shandong University of Science and Technology) Chang Lu (Shandong University of Science and Technology) Haoqiang Zhang (Zhengzhou Design and Research Institute of Coal Industry) Jinping Li (Shandong University of Science and Technology)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제21권 제4호
발행연도
2016.12
수록면
341 - 349 (9page)

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To improve the utilization rate of construction waste as mine backfilling materials, this paper investigated the feasibility of using recycled powder as mine paste backfilling cementitious material, and studied the pozzolanic activity of recycled construction waste powder. In this study, alkali-calcium-sulfur served as the activation principle and an orthogonal test plan was performed to analyze the impact of the early strength agent, quick lime, and gypsum on the pozzolanic activity of the recycled powder. Our results indicated that in descending order, early strength agent > quick lime > gypsum affected the strength of the backfilling paste with recycled powder as a cementitious material during early phases. The strength during late phases was affected by, in descending order, quick lime > gypsum > early strength agent. Using setting time and early compressive strength as an analysis index as well as an extreme difference analysis, it was found that the optimal ratio of recycled powder cementitious material for mine paste backfilling was recycled powder:quick lime:gypsum:early strength agent at 78%:10%:8%:4%. X-ray diffraction analysis and scanning electron microscope were used to show that the hydration products of recycled powder cementitious material at the initial stages were mainly CH and ettringite. As hydration time increased, more and more recycled powder was activated. It mainly became calcium silicate hydrate, calcium aluminate hydrate, etc. In summary, recycled powder exhibited potential pozzolanic activities. When activated, it could replace cementitious materials to be used in mine backfill.
#Chemical activation #Mine paste backfill #Pozzolanic activity #Recycled powder

목차

ABSTRACT
1. Introduction
2. Physicochemical Properties Analysis of Recycled Powder
3. Pozzolanic Activity Test of Recycled Powder
4. Hydration Mechanism Analysis on Recycled Powder Cementitious Material under the Optimal Mixture Ratio
5. Conclusions
References

참고문헌 (26)

참고문헌 신청
Wang YQ / 2013 / The issues and the countermeasures of construction waste recycling / Recy. Resour. Circ. Econ 05:27~29 google schola Leng FG / 2009 / Status and development trend of construction waste resource at home and abroad / Environ. Sanit. Eng 01:33~35 google schola Wang XM / 2014 / New technique of construction waste backfilling in deep mines based on magnetized water / J. China U. Min. Technol 43:981~986 google schola Liu Y / 2012 / advance of filling paste into mine goaf with building waste / J. Shandong U. Sci. Technol. (Nat. Sci.) 31:52~56 google schola Liang XJ / 2011 / Experimental research on roadway filling with skeleton type based on construction waste / Met. Mine 11:62~64 google schola

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