Influences of Environment Climate Conditions on Concrete Carbonation Rate

Environment climate conditions are important influencing factors on concrete carbonation rates. Influences of concrete internal microclimate conditions including internal temperature (T) and relative humidity (RH) and external climate conditions including wind speed and wind direction on concrete carbonation rates were studied through laboratory accelerated carbonation experiments. Models based on concrete internal microclimate conditions were established. Results indicate that internal T always present accelerating effects on concrete carbonation rates, while internal RH and pore water saturation degree (PS) show hindering effects on it. Wind direction and wind speed have certain effects on concrete carbonation rate, and the higher wind speed, the higher concrete carbonation rate is. For the same wind speed, carbonation rate is the highest for perpendicular direction.