Experimental study on a mortar. Temperature effects on porosity and permeability. Residual properties or direct measurements under temperature

Lion, Maxime; Skoczylas, Frédéric; Lafhaj, Zoubeir; Sersar, M.

doi:10.1016/j.cemconres.2005.02.006

Cited by 79 publications

(42 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They showed that increasing confinement caused partial closure of microcracks and permeability decreased by up to 46%. Similarly, Mills [49] and Lion et al [50] observed gas permeability decreased by up to 50% when measured at increasing confinement pressure to 28 MPa. They suspected microcrack closure, but did not provide supporting evidence.…”

Section: Significance Of Drying-induced Damage On Transportmentioning

confidence: 99%

Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking

Wong

Buenfeld

2017

Cement and Concrete Research

116

View full text Add to dashboard Cite

Drying and wetting induce a number of microstructural changes that could impact transport properties and durability of concrete structures, but their significance is not well-established. This research examines pastes, mortars and concretes with different w/b ratios, binders, aggregate sizes, curing and conditioning regimes. 50 mm thick samples were dried to equilibrium at either 105C, 50C / 7% RH, 21C / 33% RH or gentle stepwise at 21C / 93% RH  3% RH, and then rewetted stepwise by humidification at 21°C / 33% RH  86% RH and full saturation to produce varying degrees of damage and moisture content. Oxygen diffusivity and permeability, electrical conductivity, microcracking, accessible and total porosity were measured at different conditioning stages over 3-year period to better understand the effects of shrinkage, hysteresis and drying-induced damage on transport properties. The effect of supplementary cementitious materials (GGBS, SF) and implications of dryingwetting on concrete durability are discussed.

show abstract

Section: Significance Of Drying-induced Damage On Transportmentioning

confidence: 99%

Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking

Wong

Buenfeld

2017

Cement and Concrete Research

116

View full text Add to dashboard Cite

show abstract

“…The study by Vydra et al (2010) also showed the maximum loss of free water in endotherm at 90ºC for TEMELIN and at 95ºC for PENLY. As Lion et al (2005) explained, aggregates expanded upon heating, whereas cement paste did not expand until 150ºC and it shrank again when temperature continued to rise. As a consequence, the strain incompatibilities between them could cause micro-cracks and resulted in high variability of porosity and permeability.…”

Section: Permeability and Porositymentioning

confidence: 95%

“…The initial temperature was 24ºC (room temperature) and the incre- mental rate was set at 5ºC/minute by a high temperature oven. When the peak temperature was attained, samples were maintained in the oven for more 12 h until constant weights were accessed (Lion et al 2005). During the cooling process, samples were transferred into a freshwater tank with a temperature of 20± 5°C for 3h.…”

Section: Heating and Cooling Cycle Proceduresmentioning

confidence: 99%

Experimental Study on Hydraulic and Macro-Mechanical Property of a Mortar under Heating and Cooling Treatment

Lin

Wang

et al. 2016

ACT

View full text Add to dashboard Cite

“…In the samples exposed to high temperature the water of crystallization disappears, which promotes the slow process of the destruction of concrete structure. Along with it, new surfaces start to be exposed to external media (including leaching water) [12]. This process results in the increase of the amount of chromium released into the environment.…”

Section: Concentrationmentioning

confidence: 99%

Effect of high temperature on immobilization of heavy metals in concrete with an addition of galvanic sludge

Król

2008

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

The paper presents the results of research devoted to the stability of concretes based on various cements, which contain added galvanic sludge content in the circumstances of various temperature levels (200°C, 400°C, 600°C). The mechanical properties of stabilizing concretes under various temperatures are presented. The particular focus was placed on the immobilization of heavy metals following the process of roasting concrete specimens under high temperatures.

show abstract

Experimental study on a mortar. Temperature effects on porosity and permeability. Residual properties or direct measurements under temperature

Cited by 79 publications

References 17 publications

Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking

Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking

Experimental Study on Hydraulic and Macro-Mechanical Property of a Mortar under Heating and Cooling Treatment

Effect of high temperature on immobilization of heavy metals in concrete with an addition of galvanic sludge

Contact Info

Product

Resources

About