摘要
为能更好地按指定性能对超高性能混凝土(UHPC)进行组成参数设计,采用理论分析、数值模拟的方法对UHPC抗压强度与其组成参数之间的关系进行研究。结合水泥基材料性能与组成、微结构之间相互关系原理,以及UHPC组成和水化特点,考虑浆体初始密实度和水化作用导致的密实度增加效应,建立UHPC抗压强度σ与其水泥石密实度φ、钢纤维体积掺量等参数之间相互关系的数学模型,并以试验数据对该数学模型进行验证。研究结果表明:模型预测结果与试验实测值吻合良好,可为预测UHPC抗压强度提供一定的参考依据。
In order to better design the composition parameters of ultra-high performance concrete(UHPC)according to the specified performance,the relationship between compressive strength and composition parameters of UHPC was studied by theoretical analysis and mathematical simulation.Based on the principle of the relationship between the properties,composition and microstructure of cement-based materials,as well as the composition and hydration characteristics of UHPC,considering the initial compactness and increased compactness by hydration,a mathematical model of the relationship between UHPC compressive strengthσand its compactnessφand fiber reinforced effect was established and the model was verified by experiments.The results showed that the fitting formula of the model predicted results and the measured values of the test agreed well and can provide a certain reference for predicting the compressive strength of UHPC.
作者
王慧慧
商涛平
龙广成
谢友均
石晔
WANG Huihui;SHANG Taoping;LONG Guangcheng;XIE Youjun;SHI Ye(School of Civil Engineering,Central South University,Changsha 410075,China;Shanghai Urban Construction Municipal Engineering Co.,Ltd.,Shanghai 200065,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2020年第11期2816-2822,共7页
Journal of Railway Science and Engineering
基金
国家自然基金项目资助项目(11790283)。
关键词
超高性能混凝土
抗压强度
组成参数
密实度
模型
ultra-high performance concrete
compressive strength
component parameters
compactness
model
