Sorption characteristics of foam concrete

Nambiar, E.K. Kunhanandan; Ramamurthy, K.

doi:10.1016/j.cemconres.2007.05.010

Cited by 190 publications

(70 citation statements)

References 19 publications

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“…The transport of aggressive liquids into concrete depends on its permeation characteristics (Nambiar and Ramamurthy 2007b). In this study, measurements of water absorption, the ease with which water can penetrate foamed concrete, and permeability, a measure of the flow of air under pressure, were carried out to determine the permeation characteristics.…”

Section: Permeation Characteristicsmentioning

confidence: 99%

“…Nambiar and Ramamurthy (2007b) reported that various procedures, different drying temperatures and/or immersion periods, have been adopted in measuring the water absorption resulting in widely different results. Examples are immersion in water for 24h (ASTM C796 1997), immersion for 7 days/till a constant mass (Kearsley and Wainwright 2001a) and adopting a vacuum saturation method.…”

Section: Permeation Characteristicsmentioning

confidence: 99%

“…The material required per m 3 of the selected mixes was calculated using the absolute volume method. The required amount of foam was generated and added immediately to the base mix (sand-cement mix) and mixed in an ordinary mixer till the foam was uniformly distributed and incorporated into the mix (Nambiar and Ramamurthy 2007b). The fresh mix density was measured by weighing a preweighed container of known volume after filling it with foamed concrete.…”

Section: Materials and MIX Proportionsmentioning

confidence: 99%

“…Three quite different mixes of foamed concrete were made with nominal densities of 1300, 1600 and 1900 kg/m 3 . To achieve these target densities, the water cement ratios of these mixes were determined, by trials, ensuring the stability of the wet foamed concrete mix and also that the measured density was equal or nearly equal to the design density (Nambiar and Ramamurthy 2007b;Nambiar and Ramamurthy 2008). The material required per m 3 of the selected mixes was calculated using the absolute volume method.…”

Section: Materials and MIX Proportionsmentioning

confidence: 99%

“…The transport of aggressive liquids into concrete depends on its permeation characteristics such as permeability, water absorption and sorption (Nambiar and Ramamurthy 2007b) which represent the most important factors affecting the service life of a concrete structure (Sanjuan and Munoz-Martialay 1996b). In consequence, an important indicator of concrete long term durability is its permeability which is the relative ease with which an aggressive substance can penetrate into concrete (Alshamsi and Imran 2002;Neville 2011;Sanjuan and Munoz-Martialay 1996b).…”

Section: Introductionmentioning

confidence: 99%

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Pore Structure and Permeation Characteristics of Foamed Concrete

Hilal

Thom

Dawson

2014

ACT

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A study has been undertaken to investigate the pore structure characteristics, porosity and critical pore diameter of preformed foamed concrete with a density between 1300 and 1900 kg/m 3 , and its effect on the permeation characteristics, water absorption and permeability. Different measured and calculated methods were adopted to determine the above properties and a comparison between them was done. Porosity was measured by apparent, total vacuum saturation and mercury intrusion porosimetry (MIP) methods, while permeability was measured (by constant and falling head methods) and calculated (by the Katz and Thompson model). Total porosity and dry density are found to be clearly related. The critical pore diameter (from the MIP test) and the pore diameter size (>200nm) are found to be closely related to the permeability of foamed concrete.

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Section: Permeation Characteristicsmentioning

confidence: 99%

Section: Permeation Characteristicsmentioning

confidence: 99%

Section: Materials and MIX Proportionsmentioning

confidence: 99%

Section: Materials and MIX Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pore Structure and Permeation Characteristics of Foamed Concrete

Hilal

Thom

Dawson

2014

ACT

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Moisture Transfers in Porous Construction Materials: Mechanisms and Applications

Belarbi¹,

Abahri²,

Trabelsi³

2015

Structure Design and Degradation Mechanisms in Coastal Environments

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International audienceThis chapter provides an overview of the current state of knowledge of the physical phenomena involved in the coupled heat, air and moisture (HAM) transfer in porous building materials. It addresses the mechanisms involved in the hygrothermal transfers. The chapter discusses on the driving potential in porous media and their sensitivity on the transfer. Porous media may be regarded as macroscopically heterogeneous and anisotropic. Coupled heat and moisture transfers in porous media are explored in many scientific areas such as wood drying, hygroscopic textile materials, food and building envelopes, among others. The water vapor permeability is not only dependent on the material and its thickness, but also on the vapor pressure applied on the material. Gravimetric methods are more widely used for the characterization of hygroscopic storage and transfer in porous building materials

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