This is the case of CEM I mortar, CEM II mortar, and especially CEM II paste.
Change in BETN2 of CEM I mortar is not really significant, while CEM II mortar shows a slight increase of the BETN2.
Different materials, which were CEM I mortar and paste, CEM II mortar and paste, were carbonated at 20 °C, 65%% relative humidity and 20%% of CO2 concentration.
Open image in new window Fig. 3 Pore size distribution determined by nitrogen adsorption of CEM I mortar (a), CEM II mortar (b), CEM I paste (c) and CEM II paste (d).
In the contrary, this increase is very slight in the case of the CEM I mortar, while the CEM I paste shows a clear decrease in the volume of these pores. .
In the contrary, this increase is very slight in the case of the CEM I mortar, while the CEM I paste shows a clear decrease in the volume of these pores.
Mixtures containing scoria-based blended cements were prepared by changing the w/b ratio in order to obtain a flow within ±5 of that of the CEM I mortar.
It should be also noted that after 100 days of exposure to acid solutions, especially sulfuric and nitric acids, SRPC and, to a smaller degree, CEM I mortar cubes showed a surface layer of brown color.
The work will concentrate on two main points: (1) The influence of the type of materials on the evolution of microstructural properties during carbonation will be studied using a same technique, which is Nitrogen adsorption, on different materials, which are CEM I mortar and CEM I paste, as well as CEM II mortar and CEM II paste.
