In order to lower of cost and minimize the
impact on urban environment caused by shield muck transportation and
accumulation, and to achieve the recycling of solid waste, the synchronous
grouting material was prepared by using shield muck to replace overall sand and
rice husk ash(RHA) to replace part of cement, and the related properties of
prepared slurry were analyzed. The results show that: (1) The addition of RHA
has great influence on consistency and setting time, i. e., the higher the
content of RHA, the smaller the consistency and setting time. (2) When the RHA
replacement rate is 25%, the consistency is reduced by 27.5%, and the setting
time is shortened by 31.5%; the strength of grouting material decreases first
and then increases with RHA content increasing; the strength of grouting
material at 28 d is not lower than that of grouting material without RHA. (3)
With the increase of muck particle size, the consistency and setting time of
grouting material decrease, while the strength of grouting material increases.
The experiment determined the ratio of grouting material: water-binder ratio 2.5, RHA content 25%, and muck particle size 2.36-9.5
mm, which not only improved the consistency of grouting material (105 mm), but
also significantly increased the strength (3.35 MPa). The indices of grouting
material met the requirements, providing a new idea for the reuse of residue in
shield tunneling.
REN Yongchang
. Preparation and Performance
Analysis of Synchronous Grouting Material
With Shield Muck[J]. Tunnel Construction, 2024
, 44(S1)
: 204
-210
.
DOI: 10.3973/j.issn.2096-4498.2024.S1.022