DESIGN AND ASSESSMENT OF A SELF-COMPACTING ULTRA-HIGH PERFORMANCE FIBRE REINFORCED CONCRETE (SCUHPFRC): TOWARDS TO CLARIFY THE MULTIPLY IMPACTS FROM MINERAL ADMIXTURES AND SUPERPLASTICIZER
This study addresses an efficient method to develop a Self-Compacting Ultra-High Performance Fibre Reinforced Concrete (SCUHPFRC), based on clarifying the multiply impacts from mineral admixtures and superplasticizer.The concrete skeleton is designed based on modified Andreasen and Andersen (A&A) model, aiming at achieving a densely compacted matrix.Then, the dosage of superplasticizer and multiply impacts of mineral admixtures (e.g.: fly ash and ground granulated blast furnace slag) and superplasticizer on the rheology, flowability, compressive strength and hydration kinetics of the designed concrete matrix are evaluated, aiming at optimizing the use of superplasticizer The obtained experimental results show that there is an optimized superplasticizer dosage, excess superplasticizer on one hand can cause the materials waste, on the other hand could significantly restrict the cement hydration kinetics and reduce the compressive strength for the designed UHFRPC.Moreover, the optimized superplasticizer dosage of UHFRPC with various minerals are different, blending of fly ash and superplasticizer can further improve the superplasticizer efficiency.Finally, based on the obtained experimental results in this study, a SCUHPFRC with 2.3% superplasticizer (by the mass of cementitious materials) and about 30% fly ash (by the mass of cementitious materials) are produced and evaluated.
Multiply impacts mineral admixtures superplasticizer self-compacting ultra-high performance fibre reinforced concrete (SCUHPFRC) optimized dosage
Xinpeng Wang Rui Yu Zhihao Zhang Qiulei Song Zhonghe Shui
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China; State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China School of Materials Science and Engineering, Wuhan University of Technology, China
国际会议
福州
英文
181-190
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）