Creep Characteristics of Hardened Cement Paste under Different Internal Humidity
WANG Lixing
MA Gang
TANG Zhuo
XIE Youjun
LONG Guangcheng
Abstract：Macroscopic and microscopic creep tests were conducted,combined with low-field nuclear magnetic resonance 1H-NMR and nitrogen adsorption tests,to systematically investigate the creep characteristics and humidity response mechanisms of hardened cement paste under different internal relative humidity conditions(10%-98%).The results indicate that as the internal relative humidity decreases,the creep deformation of hardened cement paste gradually decreases,the creep modulus significantly increases,and the characteristic time shortens accordingly.Within the relative humidity range of 10%-98%,the relationship between creep modulus and relative humidity conforms to a parabolic function.Based on this,a creep modulus-relative humidity dependency model was established,demonstrating good predictive capability.With decreasing internal relative humidity,both the pore volume and water saturation of gel pores and transition pores show a declining trend.The creep modulus exhibits a strong negative linear correlation with the water saturation of gel pores,while its relationship with the water saturation of transition pores follows a parabolic pattern.
Keywords：hardened cement pastecreep characteristicpore structurehumidity-responsive mechanismdependency model
Publication Date：2026-01-31
Online Publishing Date：2026-03-17(First online date of this platform, not the publication date of the document)
Pages：11( 28-38 )