Influence of cracking and healing on the gas permeability of cementitious composites

Yıldırım, Gürkan; Şahmaran, Mustafa; Balçıkanlı, Müzeyyen; Özbay, Erdoğan; Lachemi, Mohamed

doi:10.1016/j.conbuildmat.2015.02.095

Cited by 56 publications

(11 citation statements)

References 16 publications

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“…Fu et al [5] reported 43 the influences of uniaxial tensile fatigue loads on chloride ingress. Yildirim [6] and Sahmaran et al [7] proved 44 that tensile loading induced cracks significantly increased the gas permeability and Cldiffusivity. Sahmaran 45 et al [8] also reported that applying external loads can generate damage (micro cracks) within the concretes 46 and the ingress of Clbecomes faster.…”

Section: Introductionmentioning

confidence: 99%

Influence of axial loads on CO2 and Cl− transport in concrete phases: Paste, mortar and ITZ

Wang

Jiang

Wang

et al. 2019

Construction and Building Materials

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In most studies concerning the influence of external loads on transport properties of concrete, 12concrete is assumed to be homogeneous and hence, differences in the transport properties of its components, 13which have various physicochemical properties, are not examined. The differences would be further changed, 14when there is load on the concrete. Therefore, the results obtained can seldom explain changes in the transport 15properties due to the applied loads and neither can they further enhance existing transport knowledge. An 16experimental study on carbonation and Clingress in concrete components, viz., paste, mortar and the interface 17 transition zone (ITZ), subjected to different levels of non-destructive axial tensile and compressive loads, was 18 carried out. The results obtained indicate that there was an approximately linear relationship between the non-19 destructive load and the depth of carbonation. The external load had a significant effect on the CO2 and 20 chloride transport process in the ITZ, where a large amount of calcium hydroxide crystals can be found; for 21 the mortar and ITZ samples, the influence of load on the depth of Clingress was more significant than on the 22 carbonation, whereas the influence of the load on the ingress of CO2 and Clwas similar in the interface-free 23 paste sample. It is also found that comparing to tensile loads, compressive loads inhibited the transport of CO2 24and Clat the later stage of exposure. 25 26

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Section: Introductionmentioning

confidence: 99%

Influence of axial loads on CO2 and Cl− transport in concrete phases: Paste, mortar and ITZ

Wang

Jiang

Wang

et al. 2019

Construction and Building Materials

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“…Regarding with the gas permeability, the following study should be considered in the manuscript: "Influence of Cracking and Healing on the Gas Permeability of Cementitious Composites", Construction and Building Material, 85, 217-226 (2015). "The paper has been cited and the following sentence has been added to the related section *Detailed Response to Reviewers Yildirim et al (2015e) investigated the influence of cracking and self-healing on the gas permeability of Engineered Cementitious Composites (ECC). Though application of pre-loading led to significant increases in gas permeability, so that even microcracks of less than 50 μm caused a gas permeability coefficient fifty times higher than that of sound specimens, the crack-healing resulted in a recovery in the same permeability up to 96% after only a month through proper material design and conditioning.…”

mentioning

confidence: 99%

Experimental characterization of the self-healing capacity of cement based materials and its effects on the material performance: A state of the art report by COST Action SARCOS WG2

Ferrara

Mullem

Alonso

et al. 2018

Construction and Building Materials

208

129

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“…The Hagen–Poiseuille equation for laminar flow under steady‐state condition (which can be calculated using a modified Darcy's equation) was used to determine the apparent gas permeability coefficient ( k a ):

k_{a} = \frac{2 italicLμ P_{2} Q}{A ((), P_{1}^{2} - P_{2}^{2})}

where P 1 is the inlet gas pressure (N/m 2 ), P 2 is the outlet gas pressure (N/m 2 ), L presents the thickness of specimen (m), A stands the cross‐section area of the sample (m 2 ), Q is the volumetric flow rate of the fluid (m 3 /s), and μ is the viscosity of infiltrating gas at the testing temperature (Pa·s). For Helium at a temperature of 20°C, the viscosity μ may be taken as 1.98 × 10 −5 Pa·s.…”

Section: Methodsmentioning

confidence: 99%

Effect of cementitious capillary crystalline waterproofing coating on the gas permeability of mortar

Zhang

Zuo

Yang

et al. 2019

Structural Concrete

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This study presents an experimental investigation in the effect of cementitious capillary crystalline waterproofing (CCCW) coating on the gas permeability of mortar and the mechanism how the gas permeability is affected. The gas permeability coefficient of mortar coated with or without CCCW material was measured through modified Cembureau method. The pore structure, micromorphology and hydration products of cement paste with or without CCCW coating were analyzed by the means of mercury intrusion porosimetry (MIP), scanning electron microscopyenergy disperse spectroscopy (SEM-EDS), X-ray diffraction (XRD) and thermogravimetry-differential scanning calorimetry (TG-DSC). The results showed that under the effect of CCCW coating, the gas permeability of mortar got decreased and the pore structure changed towards smaller pore sizes. SEM-EDS results exhibited that there was a large amount of ettringite filling in the pores in the paste with CCCW coating. XRD and TG-DSC analysis indicated that there was more calcium carbonate formed in the paste with CCCW coating than blank paste. The formation of ettringite in pores and increased calcium carbonate production refines the pore size distribution and densifies the cement matrix, which induces the decrease in gas permeability of mortar coated with CCCW material. K E Y W O R D SCaCO 3 , cementitious capillary crystalline waterproofing material, ettringite, gas permeability, hydration products, microstructure

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Influence of cracking and healing on the gas permeability of cementitious composites

Cited by 56 publications

References 16 publications

Influence of axial loads on CO2 and Cl− transport in concrete phases: Paste, mortar and ITZ

Influence of axial loads on CO2 and Cl− transport in concrete phases: Paste, mortar and ITZ

Experimental characterization of the self-healing capacity of cement based materials and its effects on the material performance: A state of the art report by COST Action SARCOS WG2

Effect of cementitious capillary crystalline waterproofing coating on the gas permeability of mortar

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