Stress–strain model of cement asphalt mortar subjected to temperature and loading rate

Temperature Sensitivity of Mechanical Properties of Cement Asphalt Mortar with Nanoparticles

“…It is seen in Table 5 that the flexural strengths of CAM with and without nanoparticles follow the same pattern related to the variation of temperature. e flexural strengths of CAM with and without nanoparticles were found to decrease with the increasing temperature, which agrees with the results in the previous research [2,9,11,14]. However, the strength decreasing rate of each CAM is different with respect to the type and amount of nanoparticles.…”

“…e compressive strength, tensile strength, dynamical modulus, and stress-strain response of CAM with different asphalt to cement ratio were experimentally studied when the temperature was varied. e experimental results indicated that (1) the mechanical properties of CAM decreased with the increasing temperature [2,9], (2) the temperature sensitivity of CAM was closely related to the asphalt to cement ratio [11,12], and (3) the temperature-sensitive behavior of CAM was also found to be correlated with the loading rate and water pressure [13][14][15]. According to the research, the behavior of CAM under low and high temperature can be well interpreted and reasonably predicted by the proposed model.…”

Experimental Investigation of Stochastic Mechanical Behavior of Cement Emulsified Asphalt Mortar under Monotonic Compression

“…In view of CA mortar normally being under the coupling effect of varied loading frequencies and temperatures during the service condition, the mechanical properties have been usually examined incorporated with strain rate effects and temperature sensitivity. Such approaches have been applied successfully to deal with relative topics, and a variety of works can be traced [8,21,[23][24][25][26][28][29][30][31][32][33]45]. In detail, several conclusions are can be drawn according to those researches: (1) the compressive strength, compressive strain, and the elastic modulus are much more sensitive than traditional Portland cement mortar and concrete to strain rate effect [28]; (2) the peak strength, discrete dynamic Young's modulus, and specific energy absorption increase with strain rate [8,21,23,25,26,31]; (3) the compressive strength and elastic modulus increase monotonically with confining pressure [24]; (4) increasing temperature results in the decrease of mechanical properties such as resilient modulus, compressive strength, and flexural strength, the temperature sensitivity and loading rate dependence for mechanical properties with higher asphalt-to-cement content ratio (A/C) are greater than those with lower A/C [22,25,32,33,45]; (5) the storage modulus gradually decreases with increasing temperature and decreases with the increase of A/C and water content [29].…”

“…As a fundamental problem with respect to mechanical behaviors, the constitutive relationship of the material is regarded as the basis of the research on the performance of structural analysis. Up until now, a variety of empirical or theoretical approaches have been successfully developed and applied in modelling such behaviors for different materials [8,[21][22][23][24][25]35,46,48]. However, relevant studies for CA mortar are limited at present.…”

“…To date, much effort has been directed towards the exploration of relevant properties for CA mortar due to its crucial role in safety and life control for railway track structures. Generally, three major categories can be identified in present research topics referring to CA mortar: (a) physical and chemical properties of fresh CA mortar [9][10][11][12][13][14][15][16][17][18][19], which mainly incorporate the properties of rheology, water absorption and expansibility, seepage, and expansibility; (b) mechanical properties of hardened CA mortar [8,[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], where particular attention is chiefly paid to the issues of critical compressive strength, Young's modulus, strain-stress relationship, strain rate effect, and temperature sensitivity; (c) investigations of the durability properties of hardened CA mortar [37][38][39][40][41][42][43][44][45][46][47], which primarily aim at the behaviors of fatigue properties, creep and stress relaxation, freezing resistance, and water erosion. 2…”