Causes and Solutions of Bleeding Segregation of C35 Concrete of a Railway Pier
The C35 concrete of a railway bridge in the electrification reconstruction project of Jining-Tongliao railway is in good condition,and the bleeding segregation occurs in a short time after reaching the site,and the hardening is serious,which can not meet the needs of on-site construction.On the basis of previous research results,through the paste fluidity test,it is found that the poor adaptability of admixture and fly ash is the main reason for the poor working performance of C35 concrete on site.By adjusting the relevant components of admixture,the content of fly ash and slag powder and the fineness modulus of sand,the C35 concrete with good slump,expansion and workability and meeting the requirements of on-site pumping construction is modulated,and the problems of bleeding segregation and serious hardening of C35 concrete of the railway bridge are successfully solved.
railway bridge pierC35 concretebleeding segregationadmixturescementitious material
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