Experimental studies of temperature effect on the compressive strength of solidified cement-based grout
FAN Lidan
SHI Zhijie
YU Yongqiang
LI Kaifang
ZHANG Zijian
Abstract：In view of the recent emerging engineering of grouting reinforcement under high-temperature geothermal condition, the studies about the effect of temperature on compressive strength of solidified cement grout with different water-cement ratios and composition have been carried out in simulated environment in the laboratory. As a result of this study,the compressive strength significantly decline as the water-cement ratio increase,and it descends slowly when water-cement ratio goes up to a certain value. The 3 d strength presents a gradually increased tendency as the temperature rise,however,the 14 d and 28 d strength increases at temperature below 40℃ and then decreases at temperature above 40℃. The less the water-cement ratio is,the lower the corre-sponding temperature threshold beneficial for strength will be. Moreover,the strength improves with the growth of age at 20℃ and 40 ℃,whereas it presents a decreasing tendency at 80 ℃. The addition of 6％ and 9％ bentonite has favorable effect on the strength of cement grout with water-cement ratio of 1.0 at 20℃ and 40℃,nevertheless,it has negative effects at 80℃.
Keywords：solidified cement-based grouttemperaturewater-cement ratiobentonitecompressive strength
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 67-70 )