硅酸盐通报2017，Vol.36Issue(6)：1818-1822,5.
旋转黏度计测定水泥浆体静态屈服应力和黏弹性研究
Static Yield Stress and Viscoelasticity of Fresh Cement Paste Measured by Rotational Viscometer
摘要
Abstract
The static shear rate, stress relaxation and creep tests were carried out by using rotational viscometer to investigate the static yield stress and viscoelasticity of cement paste.The results show that the fresh cement paste is a viscoelastic fluid with yield stress, and its static yield stress is the shear stress corresponding to the transformation of elasticity to viscosity;Yield stress and viscoelasticity of paste can be measured by the constant shear rate, stress relaxation and creep.In the constant shear rate test, the yield stress test of the fresh cement paste depends on the choice of the shear rate during the test, the cement slurry does not exhibit static yield stress when the shear rate is too low, and the static yield stress is small when the shear rate is too high;in the stress relaxation and creep tests, the measured static yield stress of the cement paste is more accurate than the constant shear rate test.For fresh cement paste with its static yield stress unknown, it''s better to select the shear rate and the shear stress range roughly through a constant shear rate test and then accurately test the static yield stress by stress relaxation or creep test.关键词
静态屈服应力/黏弹性/恒定剪切速率/应力松弛/蠕变Key words
static yield stress/viscoelasticity/constant shear stress/stress relaxation/creep分类
通用工业技术引用本文复制引用
李振,王大富..旋转黏度计测定水泥浆体静态屈服应力和黏弹性研究[J].硅酸盐通报,2017,36(6):1818-1822,5.基金项目
国家自然科学基金(51338001,51278324) （51338001,51278324）
