The Use of Quickly Slaking Lime in Production of Cellular Concrete
Keywords:quickly slaking lime, retarders, cellular concrete, white inclusions, macro- and microstructure, electrostatic charge.
The article presents research data on the use of quick-slaking lime (up to 5 min) in production of cellular concrete. It has been observed that, in burning limestone in a rotating furnace, while it is staying for a short time under isothermal conditions in a combustion zone, small highly hygroscopic lime crystals are formed. After grinding, some inclusions were found in the lime, which showed themselves as white spots in cellular concrete, a product for which it was used. It has been found that lime slaking may be prolonged by adding from 1 % – to 3 % gypsum or a similar amount of triethanolamine. The formation of white lime inclusions in cellular concrete may be avoided if lime is treated with an antistatic unit “Ekofor”, or high-speed mixers are used for production of cellular concrete mixes.
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