Thermal expansion behaviour of granites

Plevová, Eva; Vaculíková, Lenka; Kožušníková, Alena; Ritz, Michal; Martynková, Gražyna Simha

doi:10.1007/s10973-015-4996-z

Cited by 33 publications

(14 citation statements)

References 26 publications

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“…However, it should be noted that, different from the pure volume expansion of quartzite and granite, cracking of mineral particles and the formation of fractures in limestone are the most important factors for heat expansion of limestone (Chen et al 2009). Moreover, the anisotropic expansion behavior can be observed in these aggregates under elevated temperature (Chen et al 2009;Plevova et al 2016). Due to the thermal shrinkage of cement paste and the considerable thermal expansion of aggregates, a net expansion of concrete is exhibited and inner thermal stresses are generated.…”

Section: Thermal Expansionmentioning

confidence: 96%

Effect of Elevated Temperature on Mechanical Properties of Limestone, Quartzite and Granite Concrete

Tufail

Shahzada

Gencturk

et al. 2016

Int J Concr Struct Mater

150

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Although concrete is a noncombustible material, high temperatures such as those experienced during a fire have a negative effect on the mechanical properties. This paper studies the effect of elevated temperatures on the mechanical properties of limestone, quartzite and granite concrete. Samples from three different concrete mixes with limestone, quartzite and granite coarse aggregates were prepared. The test samples were subjected to temperatures ranging from 25 to 650°C for a duration of 2 h. Mechanical properties of concrete including the compressive and tensile strength, modulus of elasticity, and ultimate strain in compression were obtained. Effects of temperature on resistance to degradation, thermal expansion and phase compositions of the aggregates were investigated. The results indicated that the mechanical properties of concrete are largely affected from elevated temperatures and the type of coarse aggregate used. The compressive and split tensile strength, and modulus of elasticity decreased with increasing temperature, while the ultimate strain in compression increased. Concrete made of granite coarse aggregate showed higher mechanical properties at all temperatures, followed by quartzite and limestone concretes. In addition to decomposition of cement paste, the imparity in thermal expansion behavior between cement paste and aggregates, and degradation and phase decomposition (and/or transition) of aggregates under high temperature were considered as main factors impacting the mechanical properties of concrete. The novelty of this research stems from the fact that three different aggregate types are comparatively evaluated, mechanisms are systemically analyzed, and empirical relationships are established to predict the residual compressive and tensile strength, elastic modulus, and ultimate compressive strain for concretes subjected to high temperatures.

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Section: Thermal Expansionmentioning

confidence: 96%

Effect of Elevated Temperature on Mechanical Properties of Limestone, Quartzite and Granite Concrete

Tufail

Shahzada

Gencturk

et al. 2016

Int J Concr Struct Mater

150

View full text Add to dashboard Cite

show abstract

“…For temperature greater than 664 °C, the re-increase of TG curve may be due to the oxidation of some minerals in air atmosphere. In addition, the small endothermic peak representing α-β quartz phase transition at 573 °C is detected [19], which is visible on the DSC curve. This transition is accompanied by approximately 5 % of volume expansion which can induce numerous micro-cracks around the grain of quartz [26].…”

Section: Tg/dscmentioning

confidence: 98%

“…Sirdesai [18] demonstrated that the phase transition of quartz induced the sharply decrease of sandstone mechanical performances over 573 °C. Besides, mineral dehydration as temperature increased were also declared to weaken the rock structure [19][20][21][22]. Almost all literatures mentioned the deterioration of rock with temperature increasing is significantly related to the crystal mineral characteristics' changing at specific temperatures induced by either microwave irradiation or heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Comparative study on the deterioration of granite under microwave irradiation and resistance-heating treatment

Shou

Zeng

et al. 2019

Frattura Ed Integrità Strutturale

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“…4c, the light-colored minerals on the surface have turned to white, while dark minerals such as biotite turned to brown and the biotite layer demonstrate golden in the fractured area. This is because of the water losing in Fe-rich minerals [29]. Besides, it can be found that cracks initially appear around the biotite particles which are also split by cracks.…”

Section: Irradiating Outcomesmentioning

confidence: 98%

“…In the last phase (from 530 to 800 °C), the sharp decline in mass around 600 °C is identified as the process of dehydroxylation of biotite [28]. In the DSC curve, a small endothermic peak can be easily found at 573 °C, which is attributed to quartz α-β transition [29,30]. The stress increases due to the enlargement of volume in quartz mineral grains during the phase transition, on the other hand, its surface energy becomes very low in this course.…”

Section: Sample Propertiesmentioning

confidence: 99%

The thermal damaging process of diorite under microwave irradiation

Yuan

Zeng

et al. 2018

Frattura Ed Integrità Strutturale

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Laboratory tests have been conducted to investigate the effects of thermal damage on diorite under microwave irradiation. The sample rocks were heated to high temperature range of 300 to 800 ℃ in a single-mode microwave furnace. The experimental results show that the rocks started to crack at 500 ℃ and completely disintegrated at 700 ℃. The intensities of quartz diffraction peaks were almost unchanged while the diffraction peak intensity of hornblende gradually decreased with temperature increasing. In addition, the chlorite diffraction peak disappeared at 500 ℃. The compressive strength of the sample decreased to 40% at 600 ℃ and it approached zero at 700 ℃. In this paper, the possible reasons for the thermal effects on the fracture of diorite were discussed, which can be related to water evaporation,

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Thermal expansion behaviour of granites

Cited by 33 publications

References 26 publications

Effect of Elevated Temperature on Mechanical Properties of Limestone, Quartzite and Granite Concrete

Effect of Elevated Temperature on Mechanical Properties of Limestone, Quartzite and Granite Concrete

Comparative study on the deterioration of granite under microwave irradiation and resistance-heating treatment

The thermal damaging process of diorite under microwave irradiation

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