Moisture vapor reduction system

1. A moisture vapor reduction system for installing on a concrete slab, the system consisting of:

(a) a vapor-retarding membrane; and

(b) a fast hardening hydraulic mineral adhesive comprising:

70 to 95 wt % in components (i)-(iii), wherein (i) is mineral and/or plastic fillers, (ii) is a hydraulic binding material or Portland cement, and (iii) is optional additives; and further comprising

5 to 30 wt % in component (iv), which is a soluble sulfate providing agent,

wherein in use, the hydraulic mineral adhesive will be spread or poured on the concrete slab, and the vapor-retarding membrane will be placed or pressed onto the mineral adhesive on the concrete slab.

2. The moisture vapor reduction system according to claim 1 wherein the vapor-retarding membrane comprises a laminated waterproof or vapor-retarding material selected to be a sheet or foil.

3. The moisture vapor reduction system according to claim 1 , wherein:

(a) the vapor-retarding membrane comprises a laminated waterproof or vapor-retarding material selected to be a sheet or foil; and

(b) the fast hardening hydraulic mineral adhesive comprises:

20 to 95 wt % in a hydraulic binding material selected from the group consisting of Portland cement clinker, calcium-sulfo-aluminate and mixtures thereof,

1 to 30 wt % in soluble sulfate selected from the group comprising CaSO 4 ,

1 to 10 wt % in polymeric additives selected from the group consisting of plastic fillers, silane, homopolymers and copolymers that are, in turn, selected from the group consisting of vinyl esters, vinyl acetate, ethylene and acrylic acid esters;

optionally, 0 to 70 wt % in mineral additives selected from the group of mineral fillers, sand, lime stone, quartz powder and calcite wherein the average grain size of the mineral additives is not more than 250 μm;

0 to 4 wt % in at least one additive for the modulation of the mechanical properties of cement; and

Portland cement as a balancing rest up to 100 wt %.

4. The moisture vapor reduction system according to claim 1 , wherein the vapor-retarding membrane comprises a sheet or foil made of a waterproof and/or vapor-retarding material selected from the group consisting of metal, aluminum, plastic and polymeric materials based on polyethylene, polypropylene and/or polyvinyl chloride, polyurethanes, latex and/or rubber compositions, fluoropolymers, polytetraflouroetylen and mixtures thereof.

5. The moisture vapor reduction system according to claim 1 , wherein the vapor-retarding membrane is laminated on at least one side or optionally on both sides with natural or textile fibers.

6. The moisture vapor reduction system according to claim 1 , wherein the composition of the hydraulic material further comprises, between 0.1 to 8 wt %, additives selected from the group of soluble carbonates consisting of Na 2 CO 3 , K 2 CO 3 and mixtures thereof.

7. The moisture vapor reduction system according to claim 1 , wherein the composition of the hydraulic material consists of about:

20 to 60 wt % in calcium-sulfo-aluminate;

5 to 15 wt % in CaSO 4 ;

0.1 to 4 wt % in at least one additive selected from the group consisting of Na 2 CO 3 , K 2 CO 3 and mixtures thereof; and

Portland cement as a balancing rest to 100 wt %.

8. The moisture vapor reduction system according to claim 1 , the fast hardening hydraulic mineral adhesive consisting of 80 to 95 wt % in components (i)-(iii), wherein (i) is mineral and/or plastic fillers, (ii) is a hydraulic binding material, and (iii) is optional one or several additives; and which further consists of 5 to 20 wt % in component (iv), which is a soluble sulfate providing agent.