SCI和EI收录∣中国化工学会会刊

›› 2012, Vol. 20 ›› Issue (1): 80-88.

• FESTSCHRIFT IN HONOR OF THE 90TH BIRTHDAY OF PROF. CHEN JIAYONG • Previous Articles     Next Articles

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

ZHEN Guangyin1, ZHOU Haiyan2, ZHAO Tiantao1, ZHAO Youca1   

  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
  • Received:2011-07-01 Revised:2011-11-10 Online:2012-05-03 Published:2012-02-28
  • 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)

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. 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
  • 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)

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

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

CLC Number: