Study on the Property and Microstructure of C30 Self-compacting Fine Stone Concrete
The construction of ultra-high thin-walled super large bridges has certain requirements for the performance of concrete.Based on the construction project of the main tower of a super large sus-pension bridge in Sichuan,the theory of dense packing was used to prepare C30 self-compacting fine aggregate concrete,and the properties and microstructure were studied.The results showed that with a 20％dosage of Grade Ⅱ fly ash,the slump was increased by 10.4％,but the 28 day compressive strength was decreased by 3.6％.The 28 day compressive strength of the CEA expansion agent with an 8％dosage was decreased by 14.1％compared to the control group without the addition of the ex-pansion agent,and the slump and expansion was decreased by 13.2％and 3.8％,respectively.At the same time,the SEM test results showed that the addition of 10％CEA expansion agent SCC resulted in excessive expansion and internal structure damage.
self-compacting fine aggregate concretedense packing theoryperformance tuningmi-crostructure
万方数据
维普
