%0 Journal Article
%A MU Xin
%A CHEN Xi-kun
%A CHEN Hong-xiang
%T Influence of Sand’s  Fineness Modulus on Slurry Strength ofBackfill Grouting
%D 2017
%R 10.11988/ckyyb.20160135
%J Journal of Yangtze River Scientific Research Institute
%P 136-139
%V 34
%N 4
%X Backfill grouting is a critical step in the process of shield tunneling construction. In order to explore the development of slurry strength, we obtained sands of three  different fineness modulus(1.652,1.096,0.773) by using different sieving methods and prepared  inert slurry and rigid slurry by using the sands. Through  setting time test, direct shear test and cubic compressive test, we observed the  effect of fineness modulus of sand on the setting time and strength of inert slurry and rigid slurry. Results show that strengths of the two slurries  decrease with the increasing of fineness modulus of sand. Moreover, cement hydration in rigid slurry mainly promotes the increase of cohesion and the decrease of internal friction; while the  action of fly ash in inert slurry can be ignored.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160135