Treatment compositions for fresh concrete or mortar surfaces which offer improved adhesion capacity and water retention power

A composition intended for application to the surfaces of freshly placed or freshly demolded mortars or concretes, before the beginning of setting, in order to prevent the evaporation of the water necessary for their setting and for their hardening and to create, on said surfaces, high adhesiveness of the finishing materials, which composition is provided in the form of an aqueous emulsion comprising at least one paraffin wax alone or in combination with at least one other hydrocarbon compound, comprising:

• a) at least one paraffin wax of petroleum or synthetic origin including, as a mixture, saturated and unsaturated aliphatic hydrocarbons of general formulae CnH2n+2 and CnH2n for which n is at least equal to 30 and for which the melting point is between 40° C. and 75° C., wherein the at least one paraffin wax is present in said composition in a proportion of 5% to 60% by weight;
• b) at least one hydrocarbon compound which is a linear or cyclic hydrocarbon oil of aliphatic or naphthenic origin, alone or as a mixture, of general formulae CnH2n+2 and CnH2n for which n is less than 30, present in said composition in a proportion of 8% to 40% by weight;
• c) at least one ester-containing oil formed of at least one ester resulting from the condensation reaction of a saturated or unsaturated fatty acid with an alcohol having from one to five hydric functional groups, present in said composition in a proportion of 10% to 50% by weight;
• d) at least one latex formed of a colloidal aqueous emulsion of at least one polymer or copolymer as an emulsion in water, the at least one polymer or copolymer selected from the group consisting of homopolymers of acrylic acid, of methacrylic acid and of the esters of these acids, the ester group of which is a C1 to C12 alkyl group, copolymers of acrylic acid, of methacrylic acid or of the esters of these acids, the ester group of which is a C1 to C12 alkyl group, copolymers of vinyl and of acrylic acid or of methacrylic acid, copolymers of vinyl and of C1 to C12 esters, copolymers of acrylic or methacrylic acid, copolymers of acrylic acid or of methacrylic acid and of acrylic or methacrylic esters, styrene/acrylic or methacrylic copolymers, copolymers of ethylene and of vinyl acetate, copolymers of ethylene and of acrylic or methacrylic acid, acrylic/urethane copolymers and styrene/butadiene copolymers, present in said composition in a proportion of 15% to 35% by weight of solids content;
• e) at least one pulverulent filler of inorganic or organic origin present in said composition in a proportion of 0.02% by weight to 5% by weight;
• f) and water in a quantity sufficient for 100% by weight.