摘要
为了预测水泥浆体的徐变性能,并对比不同预测模型的精度。使用微米压痕测试确定了水泥浆体的徐变模量,使用纳米压痕点阵测试获得微观物相的接触徐变模量。随后基于一系列微观测试获得物相的体积分数。将水泥浆体划分为2个尺度,分别基于自洽(self-consistent,SC)法和Mori Tanaka法,采用4种组合方式进行徐变均匀化预测。结果表明,在凝胶尺度采用Mori Tanaka法,在浆体尺度采用SC法时,水泥浆体的长期徐变性能的预测精度较高。该研究为进行水泥基材料徐变均匀化时选择合适的计算方法提供了依据。
To predict the creep behavior of cement paste and compare the accuracy of different prediction models,the creep modulus of cement paste was determined using microindentation test and the contact creep modulus of microscopic phases was obtained using grid nanoindentation test.The volume fraction of the phases was subsequently obtained based on a series of microscopic tests.The cement paste was divided into two scales and four combinations were used for the prediction of creep homogenization based on the self-consistent(SC)and Mori Tanaka methods,respectively.Results show that the long-term creep properties of cement paste are predicted with high accuracy when the Mori Tanaka method is used at the gel scale and the SC method is used at the slurry scale.This study provides a basis for selecting an appropriate calculation method when performing the creep homogenization of cement-based materials.
作者
李悦
刘运泽
LI Yue;LIU Yunze(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit,Beijing 100124,China)
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2023年第11期1159-1166,共8页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(52078015)
北京市自然科学基金资助项目(8202005)。
