Binder for hydraulically setting self-levelling floor screeds

Details Binder for hydraulically setting self-levelling floor screeds Binder for hydraulically setting self-levelling floor screeds

C - Chemistry, Metallurgy

04

B

C04B 28/14 (2006.01)

Patent

CA 2145738

The invention relates to a binder for hydraulically setting self-levelling floor screeds or industrial floors com- prising a mixture of calcium sulphate and slag sand, in which reactive aluminates, calculated as CA, which can if desired be partially replaced by calcium hydroxide, are present, with the mixture in the three-material diagram calcium sulphate/slag sand/reactive aluminate being made up within a window which extends along the calcium sulphate - slag sand axis from 35 to 70% by weight of calcium sulphate, calculated as CaSO4, and in the direction of reactive aluminates from about 0.5 to 5% by weight, in such a way that a standard mortar prism comprising a mixture of three parts by weight of quartz sand and one part by weight of a binder at an age of 28 days, 21 days of which is storage at 20°C and 65% relative atmospheric humidity, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.

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