摘要
本文系统研究了水胶比对风电塔筒C100混凝土拌合物工作性能及力学性能的影响。结果表明:当胶凝材料用量为600 kg/m^(3)时,随着水胶比从0.18增加至0.22,混凝土的扩展度分别为640、660、680 mm,倒置坍落度筒排空时间由26 s逐渐降低至12 s,其流动性能逐渐得到优化,粘度降低。随着水胶比的增大,硬化混凝土的早期抗压强度降低,但水胶比的变化对混凝土后期抗压强度的影响较小;在降粘型超细矿物掺合料的协同作用下,水胶比的增大会对C100超高强混凝土性能具有显著影响。本研究可为风电塔筒C100混凝土预制过程中水胶比的合理选择提供一定参考。
This paper systematically investigates the effect of the water-to-binder ratio on the workability and mechanical properties of C100 concrete mixtures for wind turbine towers.The results show that with a constant binder content of 600 kg/m^(3),as the water-to-binder ratio increases from 0.18 to 0.22,the concrete's slump flow values are 640,660,680 mm,respectively,and the inverted slump cone discharge time decreases from 26 s to 12 s.These changes indicate a gradual improvement in f luidity and a reduction in viscosity.With an increase in the water-to-binder ratio,the early-age compressive strength of the hardened concrete decreases;however,the effect of the water-to-binder ratio on the later-age compressive strength is relatively minor.Under the synergistic action of a viscosity-reducing ultra-fine mineral admixture,increases in the water-to-binder ratio significantly affect the performance of C100 ultra-high-strength concrete.This study can serve as a reference for the rational selection of the water-tobinder ratio in the precast process of C100 concrete for wind turbine towers.
出处
《混凝土世界》
2025年第9期56-60,共5页
China Concrete
关键词
水胶比
风电塔筒
流动性能
粘度
力学性能
Water-to-binder ratio
wind turbine tower
flowability
viscosity
mechanical properties
