Study on preparation and properties of CF120 ultra-high-strength concrete
ZHAI Wenzhou
WANG Zilong
ZHAO Feng
ZHAO Youjun
Abstract：The CF120 ultra-high-strength concrete was prepared by conventional technology,double mixing technology and high-quality and high-strength aggregate in this study,the influence of steel fiber content,curing method and temperature on the working performance and compressive strength of CF120 concrete were studied emphatically,and the law of hydration temperature rise of CF120 concrete under different working conditions was simulated by scaling model,the results showed:CF120 concrete had good fluidity and compressive strength,which the initial slump≥220 mm,slump flow≥585 mm,inverted slump cylinder emptying time is 15.0 s and 28 d compressive strength≥139.1 MPa.With the increase of steel fiber content,the fluidity of CF120 concrete decreased,the viscosity increased significantly,and the compressive strength increased gradually.Using 90℃high temperature curing for 3 d can quickly predict the 28 d strength of CF120 concrete under standard curing.In addition,CF120 concrete had low hy-dration heat,which mold-temperature was 15.8℃.Under the condition of natural curing,the highest temperature is 38.8℃and the maximum temperature difference between inner and surface is 12.6℃,which reduced to 5.3℃after thermal insulation curing.
Keywords：CF120 ultra-high-strength concreteworking performancecompressive strengthtemperature rise
Publication Date：2023-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 91-94 )