Carbonation caused by atmospheric carbon dioxide is one of the major physicochemical processes which can compromise the service life of reinforced concrete structures. While the bulk of the carbonation reaction is that of calcium hydroxide, other constituents of the porous matrix can also carbonate and...
An over-the-shoulder look at ASR in concrete as seen using the SEM. Read More Book Review - Alkali-Aggregate Reaction in Concrete: A World Review The UC review of "Alkali-Aggregate Reaction in Concrete: A World Review" edited by Iam Sims and Alan Poole. Read More Click book image for ...
This is attributed to the carbonation reaction of the Mg- and Ca-rich minerals in the concrete specimens during CO2 curing, which produced various strength-contributing carbonate products as confirmed by many other studies [3], [6], [7]. It is also clear that the strength enhancement rate ...
Carbonation analysis is performed by considering the diffusion of carbon dioxide (CO2) and moisture, which play influential roles in the carbonation reaction. A detailed formulation process is established to apply the theoretical equations to the numerical analysis by considering the mentioned influential ...
The concrete then changes its structure and alkalinity due to the reaction. This has a direct impact on the risk of corrosion of structural reinforcement. Carbonation of concrete, also called carbonization, is a manifestation of aging of concrete in a period of time. 被引量: 3 年份: 2012 ...
This study investigates the carbonation phenomenon for both mortar and concrete in which fly ash or blast furnace slag powder is used as a replacement material for cement. An accelerated carbonation test method was employed. The major parameters considered in the study were mix proportions such as ...
in the (precast) concrete industry, to reduce the carbon footprint as well as to improve the performance of cement-based construction materials [1], [2], [3], [4], [5], [6]. However, with the extensive utilization of CO2 sequestration technology, the volume stability of cement-based ...
The effect of concrete carbonation on carbon-dioxide diffusion is modelled by using a sink term added in the diffusion equation. It is shown that, when the carbonation reaction is much faster than the diffusion process, the diffusion of carbon-dioxide in carbonated concrete can be treated as ...
Carbonation of concrete is the major time-limiting factor for the durability of reinforced concrete structures. The carbonation reaction between atmospheric CO2 and Ca(OH)2 of the concrete mass destroys the high pH environment of surrounding concrete which protects the steel bars of reinforced concrete...
A Study on Durability Improvement for Concrete Structures Using Surface Impregnant As a result of the reaction, impregnated concrete is evaluated to have more denser surface and resistance to deterioration. Finally it is experimentally verified that the concrete specimens with developed impregnant show bet...