Capillary transport in mortars and concrete
Webdiffusion numerical model of chloride transport was constructed. 2 Theory of chloride transport in unsaturated cement-based materials Chloride transport in unsaturated cement-based mate-rials includes two parts: (1) diffusion by the concen-tration gradient and (2) convection by the capillary suction effect [34, 35]. The chloride transport flux in WebThis paper describes a test rig to measure the uni-directional water absorption of mortar and concrete. The test data acquisition is controlled by purpose written software …
Capillary transport in mortars and concrete
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WebThe capillary water absorption was modeled using the Richard's equation and proper initial and boundary conditions. It was considered that all surfaces in contact with free water … WebAir permeability measurements according to the Hagen–Poiseuille equation, Scanning Electron Microscopy (SEM) and mercury intrusion porosimetry (MIP) tests were conducted on samples of cementitious mortar at different curing times to study the correlation between the increased crystallization and their microstructure. The mortar samples were …
WebJun 21, 2024 · Nowadays, the use of phase change materials (PCMs) represents a novel technique employed for retrofitting facades in existing buildings, mainly to fulfil temperature comfort and building energy efficiency requirements. The present study summarizes the results of a wide series of permeability tests carried out for understanding the moisture … WebJun 26, 2024 · According to equation (2.5), the capillary coefficient of mortar equals the slope of the fitted line, that is, ... transport in mortars and concrete using. sorption-diffusion approach.
WebJun 29, 2014 · The influence of the main constituents of concrete on capillary absorption are analysed, such as the type, volume and initial water content of LWA, the cement content and the addition of fly ash or silica fume. ... Capillary transport in mortars and concrete. Cem Concr Res 27(5):747–760. Article Google Scholar Erickson D, Li D, Park CB (2002 ... WebAug 9, 2024 · In actual engineering, most concrete structures are unsaturated, and the transport of harmful media in concrete highly depends on its saturation degree. In this …
WebDec 21, 2010 · The moisture transport in cracked cement-based materials was investigated with priority by numerical simulation. The cracked cement-basis material was treated as two components system, including the cracks and cementitious mortar. The mass balance between the water in the cracks and in the cement mortar was …
WebMar 1, 2024 · Aeolian sand (AS) can become a green resource for concrete after the reasonable utilization. Study the evolution of AS concrete (ASC) capillary water absorption (CWA) under freeze–thaw (FT) conditions is of great significance for its popularization and application. One-dimensional (1D) CWA test was performed to analyze the effects of AS … cheap motorcycle 150cc and 250ccWebNevertheless, for conditions where concrete is not fully immersed in water, the sorptivity (and not the permeability) characterizes the transport of water in porous materials by capillary suction forces and (since non-swelling soils are present) the general Darcy's law can be simplified to the Richard's equation taking into account the mass ... cyber monday microsofthttp://ciks.cbt.nist.gov/~garbocz/captrans/node9.html cheap motor boats for sale ukWebMar 9, 2024 · However, the pore which can determine the water absorbing ability of the mortar is the capillary pore. The proportion of the capillary pore is about 0–40% in cement-based mortars, and its size is among (100–1000) nm . In order to decrease the water absorption of the recycled coarse aggregate, the particle size which is used for … cyber monday micro centerWebMay 1, 1997 · Transport processes are foremost controlled by the material's porosity. Cementitious materials, such as concrete and mortars, exhibit distinct changes in … cyber monday microsoft officecyber monday microsoft office 2010 dealsWebMay 1, 2006 · Compared with the diffusion of aggressive ions within a saturated solution driven by the ionic concentration gradients, water transport induced by capillary or … cyber monday microsoft surface deals