【摘 要】
：
Carbonation of Portland cement mortars including metakaolin and limestone has been investigated.Mortar bars of a white Portland cement (P) and of three blends with a clinker replacement level of 35 wt
【机 构】
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Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO),Aarhus University, 8000 C A
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Carbonation of Portland cement mortars including metakaolin and limestone has been investigated.Mortar bars of a white Portland cement (P) and of three blends with a clinker replacement level of 35 wt.%, i.e., pure limestone (L), pure metakaolin (M), and metakaolin/limestone (ML, 3:1 w/w), were cured saturated at 20 ℃ for 91 days and then exposed to 1% (v/v) CO2 for another 91 days at a relative humidity of 57 %.Slices with a 15-20 mm thickness were split from the mortar bars and the carbonation depths were measured using a 1% phenolphthalein pH indicator.Thermo-gravimetric analysis (TGA) was used for quantification of portlandite and calcium carbonate.These data were compared with predictions from thermodynamic modeling.In addition,the microstructure was characterized by mercury intrusion porosimetry (MIP).
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