A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Origin of the Increased Sulfate Demand of Blended Cements Incorporating Aluminum-Rich Supplementary Cementitious Materials
It has been well established by several studies that LC3 requires an additional amount of gypsum on top of the normal dosage contained in OPC. In this manner, the second (aluminate) peak does not overlap with the first (silicate) peak. This required adjustment of the system sulfate content is attributed to the additional aluminate phases introduced to the system by the addition of calcined clay. However, a correlation between metakaolin (aluminosilicate) addition and the amount of additional gypsum has not been found, and the relationship between these parameters and the position of the aluminate peak is not clear. This study explored in depth this issue in order to further understand the driving mechanism controlling the sulfate demand in LC3. Our results show that there is no direct link between the aluminate phase content and the gypsum demand. On the contrary, the driving mechanism is linked to the specific surface area that the mineral additions (calcined clay and limestone) introduce to the system.
The Origin of the Increased Sulfate Demand of Blended Cements Incorporating Aluminum-Rich Supplementary Cementitious Materials
It has been well established by several studies that LC3 requires an additional amount of gypsum on top of the normal dosage contained in OPC. In this manner, the second (aluminate) peak does not overlap with the first (silicate) peak. This required adjustment of the system sulfate content is attributed to the additional aluminate phases introduced to the system by the addition of calcined clay. However, a correlation between metakaolin (aluminosilicate) addition and the amount of additional gypsum has not been found, and the relationship between these parameters and the position of the aluminate peak is not clear. This study explored in depth this issue in order to further understand the driving mechanism controlling the sulfate demand in LC3. Our results show that there is no direct link between the aluminate phase content and the gypsum demand. On the contrary, the driving mechanism is linked to the specific surface area that the mineral additions (calcined clay and limestone) introduce to the system.
The Origin of the Increased Sulfate Demand of Blended Cements Incorporating Aluminum-Rich Supplementary Cementitious Materials
RILEM Bookseries
Bishnoi, Shashank (editor) / Zunino, Franco (author) / Scrivener, Karen L. (author)
2020-04-14
6 pages
Article/Chapter (Book)
Electronic Resource
English
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