Equation for the Degradation of Uniaxial Compression Stress of Concrete due to Freeze-Thaw Damage

Abstract

To study the freeze-thaw damage characteristics of concrete, the uniaxial compressive tests of concrete under different number of freeze-thaw cycles were conducted, and the damage variable of freeze-thaw was obtained. The test results showed that the stress was a function of strain and freeze-thaw damage variable, and it can describe the degradation of concrete strength. Meanwhile, the equation for the stress-strain curved surface about strain and freeze-thaw damage variable was also proposed in this paper. The derivative function of the stress-strain curved surface equation with respect to strain presented the change of elastic modulus with the increase of freeze-thaw cycle number. Equation proposed in this paper can be used for predicting the concrete lifetime effectively in cold and large temperature difference regions.

Defects in Concrete Elements: A Study of Residential Buildings of 30 Years and above in Onitsha Metropolis, Anambra State, Nigeria

“…The author further asserted that the accumulative effect of successive freeze-thaw cycles the disruption of paste and aggregate will eventually cause significant expansion and cracking, scaling, and crumbling of the concrete. As stated by [32], Freeze-thaw damage is a major cause of deterioration of concrete structures in regions with extreme temperature variations. In their study, the authors carried out a series of experiments on concrete specimens and determined the freeze-thaw-based damage variable.…”

Numerical Simulation of Static Stress‐Strain Relationship and Failure Mode for Freeze‐Thaw Concrete

“…e quasistatic stress-strain curves obtained in this paper vary with the number of freeze-thaw cycles [8][9][10]. e peak stress and peak strain values of the typical stress-strain curves of each group are shown in Table 1.…”

“…e results show that the water-cement ratio has an important influence on the average pore diameter and concrete frost resistance. Yang et al [9] conducted a series of experiments on concrete experiments on concrete specimen and determined the freeze-thaw-based damage variable. Jiang and Niu [10] analyzed the variation of peak stress, peak strain, and uniaxial compressive stressstrain curves of concrete under freezing and thawing conditions of sulfate solution.…”