Presently, resource utilization efficiency of waste
shield slurry is low. Hence, a series of macro and
microscale tests (dehydration performance, fluidity,
unconfined compressive strength, scanning electron microscopy, and computed tomography
scan) on waste shield slurry by adding flocculationsolidification
agents are conducted to investigate the possibility of resource utilization of
waste slurry. The results show the following: (1) The slurry has a higher
dehydration rate after the addition of flocculationsolidification
agents, indicating that solidifaction promotes slurry dehydration performance.
(2) Treated by ordinary Portlandcementbased flocculationsolidification agent, the
moisture content of solidified soil can be greatly reduced under highpressure extrusion, and the unconfined compressive strength after
threeday curing becomes greater than 2 MPa, indicating
the potential as building materials. (3) The slurry treated by sulphoaluminate
cementbased flocculationsolidification
agent can be applicable as controlled
lowstrength materials with fluidity ranging from 20 to
30 cm and the threeday undefined compressive strength
becoming more than 130 kPa, indicating the potential as fluidity filling
materials. The micro test shows mutual improvement of flocculation and
solidification.
SUN Xiaohui
,
GUO Keyu
,
JI Fengling
,
LIU Heng
,
DUAN Huabo
,
CHEN Xiangsheng
. Macro and MicroCoupling
Effect of FlocculationSolidification of Waste Shield Slurry[J]. Tunnel Construction, 2022
, 42(4)
: 602
-610
.
DOI: 10.3973/j.issn.2096-4498.2022.04.008
