Analysis of concrete internal deterioration due to frost action

Wardeh, George; Mohamed, Mohamed AS; Ghorbel, Elhem

doi:10.1177/1744259110370854

Cited by 68 publications

(24 citation statements)

References 39 publications

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“…The permeability after the 100th cycle is 450 times higher than the initial permeability and at the end of the 150th cycle is 3300 times higher, what is in agreement with other research studied this problem, i.e. [14]. According to Wardeh at.…”

Section: Transport Propertiessupporting

confidence: 80%

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The influence of type of cement on the degradation of microstructure and transport properties of cement mortars exposed to frost induced damage

Wieczorek

Koniorczyk

2018

MATEC Web Conf.

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Abstract. The purpose of the study is to understand how the cyclic water freezing (0, 25, 50, 75, 100 and 150 freeze-thaw cycles) impacts microstructure and transport properties of cement-based materials. Tests were conducted on cement mortars with different water/cement ratios (w/c=0.45 and 0.40) and on two types of cement (CEM I and CEM III) without air-entraining admixtures. The changes of pore size distribution and open porosity were investigated by means of mercury intrusion porosimetry. Additionally, the relationship between intrinsic permeability and the water absorption coefficient of cement mortar samples was analysed. The water absorption coefficient and gas permeability were determined using capillary absorption test and the modified RILEMCembureau method. The evolution of transport coefficients with growing number of freeze-thaw cycles were determined on the same sample. It was also established that change of pore structure (a decrease of small pore volume <100nm and increase of larger pores >100nm) induces an increase of water transport parameters such as permeability and water absorption coefficient. The higher gas permeability corresponds to the higher internal damage. In particular, it is associated with the change of cement mortar microstructure, which indicates damage of narrow channels in the pore structure of cement mortars.

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Section: Transport Propertiessupporting

confidence: 80%

“…el. [14] the sensitivity can be explained by the fact that small pores have a great influence on the permeability and that these are the pores where the porous pressure is related to ice formation. Table 2.…”

Section: Transport Propertiesmentioning

confidence: 99%

The influence of type of cement on the degradation of microstructure and transport properties of cement mortars exposed to frost induced damage

Wieczorek

Koniorczyk

2018

MATEC Web Conf.

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“…According to Wardeh et al (2011), Sánchez de Rojas et al (2011 and Vegas et al (2009), such stress is the result, briefly, of: a) hydraulic pressure due to ice formation, with a 9% expansion in volume; b) osmotic pressure generated in the pore system by the movement of liquid water towards pores containing ice to restore thermodynamic equilibrium; and c) the pressure induced by the growth of crystals in pores and their interaction with pore walls.…”

Section: Introductionmentioning

confidence: 99%

Freeze-thaw durability of recycled concrete containing ceramic aggregate

Medina

Rojas

Frías

2013

Journal of Cleaner Production

154

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“…The water permeability coefficient k measured in m/s is related to the intrinsic permeability coefficient (K) in m 2 -the portion of hydraulic conductivity defined by the properties of the porous medium alone -by Equation 3.…”

Section: Water Permeability Testingmentioning

confidence: 99%

“…These include hydraulic pressure due to ice formation leading to 9% volumetric increase, and osmotic pressure generated in the pore system by the movement of liquid water towards concrete pores containing ice to restore thermodynamic equilibrium. Moreover, pressure resulting from the growth of ice crystals in pores and their interaction with pore walls also causes internal stresses 3,4 . Internal cracking occurs when the internal stresses generated exceed the tensile strength of concrete 5 .…”

Section: Introductionmentioning

confidence: 99%

Evaluating damage potential of cryogenic concrete using acoustic emission sensors and permeability testing

et al. 2014

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This study evaluates the damage potential of concrete of different mix designs subjected to cryogenic temperatures, using acoustic emission (AE) and permeability testing. The aim is to investigate design methodologies that might be employed to produce concrete that resists damage when cooled to cryogenic temperatures. Such concrete would be suitable for primary containment of liquefied natural gas (LNG) and could replace currently used 9% Ni steel, thereby leading to huge cost savings. In the experiments described, concrete cubes, 150 mm x 150 mm x 150 mm, were cast using four different mix designs. The four mixes employed siliceous river sand as fine aggregate. Moreover, limestone, sandstone, trap rock and lightweight aggregate were individually used as coarse aggregates in the mixes. The concrete samples were then cooled from room temperature (20°C) to cryogenic temperature (-165°C) in a temperature chamber. AE sensors were placed on the concrete cubes during the cryogenic freezing process. The damage potential was evaluated in terms of the growth of damage as determined from AE, as a function of temperature and concrete mixture design. The damage potential observed was validated with water permeability testing. Initial results demonstrate the effects of the coefficient of thermal expansion (CTE) of the aggregates on damage growth. Concrete damage (cracking) resistance generally decreased with increasing coarse aggregate CTE, and was in the order, limestone ≥ trap rock >> lightweight aggregate ≥ sandstone. Work is in progress to fully understand thermal dilation and damage growth in concrete due to differential CTE of its components.

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Analysis of concrete internal deterioration due to frost action

Cited by 68 publications

References 39 publications

The influence of type of cement on the degradation of microstructure and transport properties of cement mortars exposed to frost induced damage

The influence of type of cement on the degradation of microstructure and transport properties of cement mortars exposed to frost induced damage

Freeze-thaw durability of recycled concrete containing ceramic aggregate

Evaluating damage potential of cryogenic concrete using acoustic emission sensors and permeability testing

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