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xufeigao½ð³æ (ÕýʽдÊÖ)
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һƪÎÄÕ´óÐÞ,ÆäÖÐÉó¸åÈË2¾ä»°²»ÖªµÀʲôÒâ˼,ÎÒÒª»Ø´ðÂð 1.Regarding the previous point, there is an important fact from Wheeler's references: The most common form of deterioration of calcitic materials (limestones) is granular disintegration and as consists of relatively large grains in nearly direct contact, there is no intergranular matrix or cementing material. The porosity is low and it seems that alkoxysilanes enter intergranular spaces. 2.The way as the ability against acid rain attack is done, generally follows certain normativity. I assume the way it has been tested and it is presented has been performed for this specific case. Always is recomended to follow an specific procedure already known to certify the results. [ Last edited by xufeigao on 2011-8-30 at 21:57 ] |
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