Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash

›› 2012, Vol. 20 ›› Issue (1): 80-88.

Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash

甄广印¹, 周海燕², 赵天涛¹, 赵由才¹

1. The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engi-neering, Tongji University, Shanghai 200092, China;
2. Shanghai Laogang Waste Treatment Company, Shanghai 201302, China

收稿日期:2011-07-01 修回日期:2011-11-10 出版日期:2012-02-28 发布日期:2012-05-03
通讯作者: ZHAO Youcai,zhaoyoucai@tongji.edu.cn
基金资助:
Supported by the Science and Technology Commission of Shanghai Municipality (08 DZ 1202802,09 DZ 1204105,09 DZ2251700);the National Natural Science Foundation of China (51008322)

Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash

ZHEN Guangyin¹, ZHOU Haiyan², ZHAO Tiantao¹, ZHAO Youca¹

1. The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engi-neering, Tongji University, Shanghai 200092, China;
2. Shanghai Laogang Waste Treatment Company, Shanghai 201302, China

Received:2011-07-01 Revised:2011-11-10 Online:2012-02-28 Published:2012-05-03
Supported by:
Supported by the Science and Technology Commission of Shanghai Municipality (08 DZ 1202802,09 DZ 1204105,09 DZ2251700);the National Natural Science Foundation of China (51008322)

摘要/Abstract

摘要： This research evaluated the use of sewage sludge and refuse incineration bottom ash to replace calcium sulfoaluminate cement(CSA) in making controlled low-strength material(CLSM).Various properties of CLSM mixtures were characterized in terms of unconfined compressive strength,microstructure and leachability.It was found that the strength of tested CLSM mixtures ranged from 3.6 to 9.0 MPa,over the upper excavatable limit of 2.1 MPa.The micro-structural analysis revealed that sewage sludge and bottom ash were crystallochemically incorporated within CLSM systems by forming the needle-like ettringite(C₃A·3CS·H₃₂) with exiguous tubers via the typical Pozzolanic Reaction,leading to a dense and low-porosity microstructure.Furthermore,the toxicity characteristic leaching procedure evidenced that the cumulative leachable metals in the leachate were much below the regulatory thresholds.The potential for using sewage sludge and bottom ash in CLSM making was thus confirmed.

关键词: dewatered sludge, refuse incineration bottom ash, controlled low-strength material, solidification/stabilization, leachability

Abstract: This research evaluated the use of sewage sludge and refuse incineration bottom ash to replace calcium sulfoaluminate cement(CSA) in making controlled low-strength material(CLSM).Various properties of CLSM mixtures were characterized in terms of unconfined compressive strength,microstructure and leachability.It was found that the strength of tested CLSM mixtures ranged from 3.6 to 9.0 MPa,over the upper excavatable limit of 2.1 MPa.The micro-structural analysis revealed that sewage sludge and bottom ash were crystallochemically incorporated within CLSM systems by forming the needle-like ettringite(C₃A·3CS·H₃₂) with exiguous tubers via the typical Pozzolanic Reaction,leading to a dense and low-porosity microstructure.Furthermore,the toxicity characteristic leaching procedure evidenced that the cumulative leachable metals in the leachate were much below the regulatory thresholds.The potential for using sewage sludge and bottom ash in CLSM making was thus confirmed.

Key words: dewatered sludge, refuse incineration bottom ash, controlled low-strength material, solidification/stabilization, leachability

中图分类号:

X705

甄广印, 周海燕, 赵天涛, 赵由才. Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash[J]. , 2012, 20(1): 80-88.

ZHEN Guangyin, ZHOU Haiyan, ZHAO Tiantao, ZHAO Youca. Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash[J]. , 2012, 20(1): 80-88.

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Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash

Performance Appraisal of Controlled Low-strength Material Using Sewage Sludge and Refuse Incineration Bottom Ash

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