The Effect of High Temperature on Tensile Strength and Damage Characteristics of Limestone

Mechanical properties of 4 rocks at different temperatures and fracture assessment using the strain energy density criterion

“…In many cases, these properties are studied after subjecting the rock samples to a thermal treatment or cycle (e.g., Refs. 8,12), while in other cases (somewhat less usual) the tests are performed under temperature control (e.g., Refs. 11,13).…”

“…6 The tensile strength and the fracture toughness are particularly important parameters when analysing the fracture processes of rocks and are significantly affected by temperature. Sirdesai et al 8 and Dongming and Yushun 12 studied the influence of temperature on a sandstone and a limestone, respectively, and they concluded that changes in the pre-existing pores and microcracks (caused by the internal differential expansion of mineral particles) result in a change in the tensile strength. Similarly, Al-Shayea 18 studied the fracture toughness of a limestone rock formation under different thermal conditions and showed an increase in the fracture toughness up to approximately 120 o C, mainly due to the closure of microcracks or pores caused by the thermal expansion of grains.…”

Mechanical properties and fracture surface roughness of thermally damaged granite under dynamic splitting

“…According to the results of studies carried out by Yin, Feng et al (2021) and Su et al (2022), the dynamic splitting mechanical properties of thermally damaged rocks are influenced both by the temperature and by the loading rate. Zhang (2018) studied the splitting properties of high‐temperature‐treated limestone and found that the tensile strength, peak strain, and tensile modulus first increase and then decrease with increasing temperature. Mardoukhi et al (2017, 2021) explored the mechanical properties of granite after different flame ejecting durations under dynamic Brazilian splitting, and the results show that the increase in the duration of thermal impact considerably weakens the dynamic splitting strength of granite, and the number and fractal dimension of hot cracks on the surface of granite also increase with increasing duration of thermal impact.…”

Notch effect and fracture load predictions of rock beams at different temperatures using the Theory of Critical Distances

“…The critical distance (L) depends on both the tensile strength (𝜎 𝑢 ) and the fracture toughness (𝐾 𝐼𝐶 ) of the analysed rocks, which are certainly affected by the temperature as demonstrated by many authors (e.g., [39][40][41][42][43] ). For instance, Sirdesai et al 39 analysed the effect of temperature and the effect of thermal cycles on the tensile strength of a sandstone, and concluded that the change in the preexisting pores and microcracks caused by the expansion of minerals with temperature results in a change in the tensile strength.…”

“…For instance, Sirdesai et al 39 analysed the effect of temperature and the effect of thermal cycles on the tensile strength of a sandstone, and concluded that the change in the preexisting pores and microcracks caused by the expansion of minerals with temperature results in a change in the tensile strength. Similarly, Dongming and Yushun 43 analysed the effect of high temperature on the tensile strength of a limestone, where an initial increment followed by a decrease of the tensile strength was observed when temperature increased. Likewise, the fracture toughness reflects the residual strength of a cracked component to crack propagation, and its value is also significantly influenced by the temperature conditions.…”