TY - JOUR
T1 - Use of self-hardening slurry for trench cutoff wall
T2 - A review
AU - Huang, Xiao
AU - Li, Jiang shan
AU - Xue, Qiang
AU - Chen, Zhen
AU - Du, Yan jun
AU - Wan, Yong
AU - Liu, Lei
AU - Poon, Chi Sun
N1 - Funding Information:
This study was financially supported by the National Key Research and Development Program (Grant No. 2019YFC1804002 ), National Science Fund for Distinguished Young Scholars (Grant No. 51625903 ), National Natural Science Foundation of China (Grant No. 42007260 ), National Natural Science Foundation of China /Hong Kong Research Grants Council, University Grants Committee Joint Research Scheme (Grant No. 51861165104 ), Special Fund for Basic Research on Science Instruments of the National Science Foundation of China (Grant No. 51827814 ) and The CAS Pioneer Hundred Talents Program in China.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/6/7
Y1 - 2021/6/7
N2 - Landfilling is still the most commonly adopted means for disposal of industrial and municipal solid wastes in the world. However, contaminants from these untreated wastes may spread out with lapse of time and pollute soil and groundwater nearby, which can destroy ecological environment and threaten human's health. Thus, the encapsulation technology is usually applied for preventing spreading of the contaminants. Self-hardening slurry is prevalently used to form cutoff wall as vertical barriers for the control of horizontal migration of contaminants at those sites, due to its technological efficiency, easy operation and handling over other vertical barrier materials. This study comprehensively reviewed and assessed key properties of four types of self-hardening slurry, namely, cement-bentonite (CB) slurry, slag-cement-bentonite (SCB) slurry, fly ash–cement-bentonite (FCB) slurry and Impermix slurry. Emphasis has been put on unconfined compressive strength (UCS), permeability coefficient and chemical compatibility, which characterize the overall performances of these slurries. Apart from conventional factors, some hidden factors, such as cast-into position, depth and confining pressure, water table and scale effect etc., affecting the performance of self-hardening slurries were simultaneously investigated to shed light on the limitations and perspectives in the application of these materials.
AB - Landfilling is still the most commonly adopted means for disposal of industrial and municipal solid wastes in the world. However, contaminants from these untreated wastes may spread out with lapse of time and pollute soil and groundwater nearby, which can destroy ecological environment and threaten human's health. Thus, the encapsulation technology is usually applied for preventing spreading of the contaminants. Self-hardening slurry is prevalently used to form cutoff wall as vertical barriers for the control of horizontal migration of contaminants at those sites, due to its technological efficiency, easy operation and handling over other vertical barrier materials. This study comprehensively reviewed and assessed key properties of four types of self-hardening slurry, namely, cement-bentonite (CB) slurry, slag-cement-bentonite (SCB) slurry, fly ash–cement-bentonite (FCB) slurry and Impermix slurry. Emphasis has been put on unconfined compressive strength (UCS), permeability coefficient and chemical compatibility, which characterize the overall performances of these slurries. Apart from conventional factors, some hidden factors, such as cast-into position, depth and confining pressure, water table and scale effect etc., affecting the performance of self-hardening slurries were simultaneously investigated to shed light on the limitations and perspectives in the application of these materials.
KW - Chemical compatibility
KW - Permeability
KW - Self-hardening slurry
KW - Unconfined compressive strength
UR - http://www.scopus.com/inward/record.url?scp=85105367646&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.122959
DO - 10.1016/j.conbuildmat.2021.122959
M3 - Journal article
AN - SCOPUS:85105367646
SN - 0950-0618
VL - 286
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 122959
ER -