Freeze–thaw resistance of concretes treated with pore liners

Basheer, Lulu; Cleland, David

doi:10.1016/j.conbuildmat.2005.06.010

Cited by 70 publications

(32 citation statements)

References 1 publication

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“…vary considerably ranging from ±1.2; ?4.1/-3.3; ±10; ±11; ±15°C/h [5,6,[29][30][31]] to more rapid rates of ±24°C/h [20] and ±88°C/h [32] and ultra-rapid rates of ±120°C/h [16] and ±230°C/h [20]. The regime adopted was thus taken to represent a compromise.…”

Section: Electrical Measurements and Data Acquisitionmentioning

confidence: 99%

Conductivity/activation energy relationships for cement-based materials undergoing cyclic thermal excursions

et al. 2014

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The electrical conductivity of a range of concrete mixes, with and without supplementary cementitious materials (SCM), is studied through multiple cycles of heating and cooling over the extended temperature range -30/?70°C. When presented in an Arrhenius format, the experimental results display hysteresis effects at the lowtemperature end of the thermal cycle and, in those concretes containing supplementary cementitious materials at higher water/binder ratios, hysteresis effects were evident over the entire temperature range becoming more discernible with increasing number of thermal cycles. The depression in both the freezing and thawing point could be clearly identified and was used to estimate pore-neck and pore-cavity radii. A simplified approach is presented to evaluate the volumetric ratio of frozen pore water in terms of conductivity measurements. The results also show that the conductivity and activation energy of the concrete specimens were related to the water/binder ratio, type of SCM, physical state of the pore water and the thermal cycling regime.

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Section: Electrical Measurements and Data Acquisitionmentioning

confidence: 99%

Conductivity/activation energy relationships for cement-based materials undergoing cyclic thermal excursions

et al. 2014

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“…5) Corrosion inhibitors are regarded as useful not only as a preventative measure for new structures but also as a preventative and restorative surface-applied admixture for existing structures. Various corrosion inhibitors can be classified into [2]: (a) adsorption inhibitors, which act specifically on the anodic or on the cathodic partial reaction of the corrosion process, or on both reactions, (b) film-forming inhibitors, which block the surface more or less completely, such as the siloxane-based corrosion inhibitor [75][76][77][78] and (c) passivators, which favor the passivation reaction of the steel. The mechanistic action of corrosion inhibitors is thus not against uniform corrosion but localized or pitting corrosion of a passive metal due to the presence of chloride ions or a drop in pH value [79].…”

Section: Steel Corrosionmentioning

confidence: 99%

Recent durability studies on concrete structure

Tang

Yao

Andrade

2015

Cement and Concrete Research

448

121

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“…This causes increase in volume, which in turn enhance pressure on pore interior walls. Repetition of this process leads to formation of microcracks, breakdown of wall structure, and damage to concrete or mortar . Damage to concrete due to freezing and thawing also deteriorates its mechanical properties and fracture behavior .…”

Section: Introductionmentioning

confidence: 99%

Genetic prediction of cement mortar mechanical properties with different cement strength class after freezing and thawing cycles

Ghaemi‐Fard

Eskandari‐Naddaf

Ebrahimi

2018

Structural Concrete

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This study predicts the mechanical properties of cement mortars. It focuses specifically on cement strength classes of 32.5, 42.5, and 52.5 MPa, respectively. To this end, a total of 270 specimens using 54 mix designs were constructed and subjected to freezing and thawing cycles (FTCs) at −18 and 18 °C. Then, mechanical properties such as compressive and flexural strength and porosity of the specimens after 0, 50, 100, 150, and 200 cycles were obtained. Afterward, genetic expression programming (GEP) was used to predict the obtained results and to represent nonlinear relationships between the mechanical properties, freezing and thawing cycle, and cement strength class. The experimental data was used for training and testing of two GEP approach models. The results show that the strength of mortar reduces with increase in FTC. On other hand, a close correlation was observed between the predicted and experimental values when cement strength class and number of cycle were considered as independent input parameters. This fact indicates the significance of the aforementioned parameters along with the other parameters such as water to cement ratio, sand to cement ratio, and weight of cement on the accuracy of the prediction.

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Freeze–thaw resistance of concretes treated with pore liners

Cited by 70 publications

References 1 publication

Conductivity/activation energy relationships for cement-based materials undergoing cyclic thermal excursions

Conductivity/activation energy relationships for cement-based materials undergoing cyclic thermal excursions

Recent durability studies on concrete structure

Genetic prediction of cement mortar mechanical properties with different cement strength class after freezing and thawing cycles

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