Treatment compositions for fresh concrete or mortar surfaces...

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 40/04 (2006.01)

Patent

CA 2485649

The invention relates to compositions that are intended to be applied to freshly-poured concrete and/or mortar surfaces before the surface begins to set so as to (i) prevent the evaporation of the water present in said mortars and/or concretes, which is necessary for the setting and hardening thereof, and (ii) provide the treated surfaces with a strong adhesion capacity in relation to the finishing materials used to cover same. The inventive compositions take the form of aqueous emulsions comprising at least one paraffin (a) which is used alone or associated with at least one hydrocarbon compound (b) and/or at least one other hydrocarbon compound (c) which is different from the carbon-containing compound (b), at least one latex (d) which is formed by a colloidal aqueous emulsion of at least one polymer and at least one mineral or organic powder filler (e).

L'invention concerne des compositions destinées à être appliquées sir des surfaces de mortiers et/ou de bétons fraîchement coulés, avant le début de la prise, pour, simultanément, empêcher l'évaporation de l'eau présente dans lesdits mortiers et/ou bétons, et nécessaire à leur prise, puis à leur durcissement, et pour créer sur lesdites surfaces traitées, une capacité d'adhésion forte pour les matériaux de finition destinés à les recouvrir, ces compositions se présentant sous la forme d'émulsions aqueuses comprenant au moins une paraffine (a) seule ou associée à au moins un composé hydrocarboné (b) et/ou à au moins un autre composé hydrocarboné (c) différent du composé carboné (b) et comprenant également au moins un latex (d) formé d'une émulsion aqueuse colloïdale d'au moins un polymère, et au moins une charge pulvérulente minérale ou organique (e).

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