Research on high-performance marine concrete mix design with high water absorption coarse aggregate
BAI Pengyu
ZHANG Yan
ZHU hangchun
Abstract：Based on Maputo bridge project,mix design of high performance marine concrete is studied using coarse aggregate Namaacha gravel(N)and Hipermaquinas gravel(H)with high water absorption above 3.0%. The results show that the water absorp-tion rate and saturated water absorption of N are larger than that of H. The main reason is that the pore volume of N is larger than that of H stone,and the pore diameter is larger than that of H stone. According to the performance of the two kinds of grav-el,the mix design of C40 marine concrete using N gravel is water-cement ratio of 0.38 and the fly ash content of 35% and the mix design of C50 marine concrete using H gravel is water-cement ratio of 0.33 and the fly ash content of 20%. Seawater immer-sion experiment on the optimum mixing ratio of C40,C50 concrete shows that the 180 d compressive strength test results and stan-dard conditions strength test results are similar,chloride Ion diffusion coefficients of concrete in 365 d are less than 1.6×10-12m2/s by RCM method. The results show that the design of marine concrete has resistance to seawater erosion.
Keywords：mix designlarge water absorption coarse aggregatewater absorption ratemarine concretestrength
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：5( 5-8,36 )