The effect of freeze–thaw process on the physical and mechanical properties of tuff

Ghobadi, M. H.; Beydokhti, Alireza Taleb; Nikudel, Mohammad Reza; Asiabanha, Abbas; Karakus, Murat

doi:10.1007/s12665-016-5664-8

Cited by 44 publications

(19 citation statements)

References 30 publications

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“…But, within the state of durability of rock, the half-life, which is inversely proportional to the decay constant, is more important. Furthermore, it estimates how many cycles are required to decrease mechanical parameters to their half value; rocks that are capable to resist the frost-weathering process have higher values of half-life [37]. e values of the half-life (N 1/2 ) for the studied rock samples are presented in Tables 5− 7 and graphically indicated in Figures 6(a)-6(c).…”

Section: Decay Constant (λ)mentioning

confidence: 99%

Estimating Deterioration Rate of Some Carbonate Rocks Used as Building Materials under Repeated Frost Damage Process, China

Abdelhamid

Liu

Ren

et al. 2020

Advances in Materials Science and Engineering

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The degradation of natural rocks due to severe environmental conditions can influence their durability over an extended period of time. This research aims to investigate the long-term durability or disintegration rate of rocks used as construction materials under severe climatic conditions using frost damage action, and the deterioration rate was assessed using mathematical decay function approach. The mathematical model assumes an initial order operation and gives purposeful properties for the deterioration rate of rocks due to frost action. For this reason, six different limestone types used as building materials were quarried from limestone mine in China and subjected to a series of laboratory tests to determine the mineralogical, petrographical, physical, and mechanical characteristics. Then, 50 cycles of frost damage process was performed, and after each 10 cycles, the unconfined compressive strength, point load strength, and Schmidt rebound were determined. The disintegration rate or integrity loss characteristics of each rock type were assessed using the mathematical decay function approach parameters. This approach proved that the disintegration rate varies for the rocks of the same type especially which were extracted from the same areas, the rock durability under frost damage conditions can be estimated with good accuracy, the parameters of this model saved a lot of time and provided important practical features to assess a rapid durability, and hence, there is no need to carry out the frost damage test which is slow and consumes time.

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Section: Decay Constant (λ)mentioning

confidence: 99%

Estimating Deterioration Rate of Some Carbonate Rocks Used as Building Materials under Repeated Frost Damage Process, China

Abdelhamid

Liu

Ren

et al. 2020

Advances in Materials Science and Engineering

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“…Previous studies have shown that the uniaxial compressive strength and elastic modulus of rocks decrease exponentially with the increase of freeze–thaw cycles, but the Poisson ratio of rocks increases 6 – 8 . Moreover, many research investigations generally indicate that increasing the number of freeze–thaw cycles decreases the uniaxial compressive strength, tensile strength, dry density and P-wave velocity of rocks, while the water absorption and porosity of rocks increase 9 – 11 . Seyed et al and Yu et al conducted triaxial compression tests on frozen-thawed rocks and found that the cohesion and internal friction angle of rocks decreased exponentially with the increase of the number of freeze–thaw cycles 4 , 12 .…”

Section: Introductionmentioning

confidence: 99%

Effect of freeze–thaw cycle on physical and mechanical properties and damage characteristics of sandstone

Chen

Song

et al. 2021

Sci Rep

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Rock deterioration under freeze–thaw cycles is a concern for in-service tunnel in cold regions. Previous studies focused on the change of rock mechanical properties under unidirectional stress, but the natural rock mass is under three dimensional stresses. This paper investigates influences of the number of freeze–thaw cycle on sandstone under low confining pressure. Twelve sandstone samples were tested subjected to triaxial compression. Additionally, the damage characteristics of sandstone internal microstructure were obtained by using acoustic emission (AE) and mercury intrusion porosimetry. Results indicated that the mechanical properties of sandstone were significantly reduced by freeze–thaw effect. Sandstone’ peak strength and elastic modulus were 7.28–37.96% and 6.38–40.87% less than for the control, respectively. The proportion of super-large pore and large pore in sandstone increased by 19.53–81.19%. We attributed the reduced sandstone’ mechanical properties to the degenerated sandstone microstructure, which, in turn, was associated with increased sandstone macropores. The macroscopic failure pattern of sandstone changed from splitting failure to shear failure with an increasing of freeze–thaw cycles. Moreover, the activity of AE signal increased at each stage, and the cumulative ringing count also showed upward trend with the increase of freeze–thaw number.

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“…In fact, these zeolitic tuffs were more extensively used locally as materials for construction since Roman times, mainly due to their wide availability, easy workability, chemical–physical features and excellent pozzolanic activity [ 43 , 44 , 45 ]. However, despite their widespread use, NYT and CI are often characterized by limited performances in terms of durability, primarily due to their high degree of porosity and textural and compositional heterogeneity, which cause a strong requirement of consolidation interventions to prevent and control the unavoidable and significant weathering phenomena [ 46 , 47 , 48 ] In fact, these volcanic stones are seriously prone to decay leading to gradual stone deterioration as a result of several physical and chemical mechanisms such as moisture infiltration [ 25 , 49 ], salt crystallization [ 50 ] and freezing and thawing [ 51 ]. So, the performing of consolidation treatments represents an effective methodology to hinder the decay processes, improving the physical–mechanical properties of weathered stones through the reduction in porosity and the increase in surface cohesion [ 52 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Latest and Innovative Silica-Based Consolidants for Volcanic Stones

2021

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This research explores the new perspectives in conservation and protection of two macroporous tuff stones, widely employed in the architectural heritage of Campania region, characterized by highly heterogeneous rock fabric and texture and a variable mineralogical composition that represent crucial factors responsible for their weak durability. The consolidation treatments were performed with a recently and widely used suspension of nano-silica crystals in water and with a lithium silicate solution that has received up to now scarce attention as a consolidant agent. Physical investigations (open porosity, Hg porosimetry, water absorption), morphological observations (SEM analyses) and visual appearance test (colorimetric measurements), along with assessments of performance indicators such as ultrasonic pulse velocity, surface cohesion test (peeling test) and durability test (salt crystallization), were carried out to investigate the consolidation effectiveness. Overall, lithium silicate consolidant showed a better behavior in terms of superficial cohesion, a most successful strengthening action and a considerable enhancement of salt resistance.

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The effect of freeze–thaw process on the physical and mechanical properties of tuff

Cited by 44 publications

References 30 publications

Estimating Deterioration Rate of Some Carbonate Rocks Used as Building Materials under Repeated Frost Damage Process, China

Estimating Deterioration Rate of Some Carbonate Rocks Used as Building Materials under Repeated Frost Damage Process, China

Effect of freeze–thaw cycle on physical and mechanical properties and damage characteristics of sandstone

Comparison of Latest and Innovative Silica-Based Consolidants for Volcanic Stones

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