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Silastman
84 posts
TimePosted 27/04/2012 13:22:14
Silastman says

re Limestone

Perhaps Ted is very busy. I will answer. Because the limestone can produce with products of hydration of cement hydrocarboaluminate of calcium 3CaO·Al2O3·CaCO3·11 H2O [i], hydrocarbonat of calcium - CaCO3 ·Ca(OH)2·H2O [ii],[iii] and hydrosulfocarbosilicate of calcium (taumasit) CaO·SiO2·CaSO4·CaCO3·15 H2O [iv]. The introduction of 12-15% limestone increases the density of cement stone, frost resistance and durability. The introduction of 20%  limestone helps when you save the physico-mechanical properties of the cement stone to save the equivalent quantity of cement.


[i]. Kjellsen, K.O., Lagerblad B. Influence of natural minerals in the filler fraction on hydratation and properties of mortars. Swedish Cemtnt and Concrete Research Institute, Stockholm, 1995, 41c.

[ii]. Oshio, A. Sone T. Matsui A. Properties of Concrete Containing Mintral Powders, Cement Association of Japan Rewiev, 1987, pp. 114-117. 

[iii]. Wakizaka, Y. MoryaS. Kawano H. Relationship between Mintral Assemblages of Rocks and Their Alkali Reactivities. Cement Association of Japan Rewiev, 1987, pp. 292-295. 

 

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Ted Krapkat
537 posts
TimePosted 30/04/2012 05:30:09
Ted Krapkat says

re Limestone

Hello Silastman,

Yes, I have been quite busy lately. Thank you for answering this question from Wahid for me. Your response  was (as always) very complete and comprehensive.

Regards,

Ted.

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