Influence of power ultrasound on the rheological properties of cement-based composite materials
YE Shujun
LIANG Hao
LIU Shengjie
SONG Lei
ZHAO Zhizhong
PENG Geng
Abstract：To improve the dispersion uniformity of cement particles,the influence of power ultrasonic on the rheological properties of cement-based composite materials is studied.Ordinary Portland cement P·O 42.5 is used,with naphthalene-based water reducer FDN-C as the water reducer.Power ultrasonic is employed for pre-dispersion treatment of cement slurry,and the fluidity and bleeding rate of the slurry are tested under different water-to-cement ratios(0.50,0.55),ultrasonic powers(250,500,750 W),and ultrasonic times(0,1,2,3,4 min)to investigate the impact of power ultrasonic on the rheological properties of cement slurry.The results show that with the same ultrasonic time,the fluidity of the cement slurry increases with the increase of ultrasonic power,while the bleeding rate decreases first and then increases with the increase of ultrasonic power.When the ultrasonic power is 750 W,the fluidity and bleeding rate of cement slurry at different water-to-cement ratios are the highest.With the same ultrasonic power,the fluidity of both water-to-cement ratio cement slurries is the highest after 4 min of ultrasonic treatment.The bleeding rate of the 0.50 water-to-cement ratio slurry decreases,increases,then decreases,and increases again with the increase of ultrasonic time,while for the 0.55 water-to-cement ratio slurry,the bleeding rate continues to increase after 3 min of ultrasonic treatment.Compared to the water reducer,power ultrasonic can change the rheological properties of the cement slurry in a shorter time.The most significant effects on altering the rheological properties of the slurry are observed when the ultrasonic power is 750 W and the ultrasonic time is 2 min,and when the ultrasonic power is 500 W and the ultrasonic time is 4 min.
Keywords：cement-based composite materialpower ultrasoundrheological propertyfluiditybleeding ratewater reducing agent
Publication Date：2024-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 63-68 )