Dry mortar mixture
AssigneeAllgemeine Baugesellschaft-A.Porr Aktiengesellschaft
InventorFritz Jung
Life of this patent
Estimating the term…
Abstract
A dry mortar mix based on an inorganic bonding agent and optionally additives, plastics, fibres, and other conventional concrete additives is proposed especially to protect concrete structures and/or to eliminate surface damage to such structures. In addition to the inorganic bonding agent, the dry mortar mix contains a granular additive to increase alkalinity, this having a reaction speed that is a considerably lower than that of the granular bonding agent. This "reserve alkalinity" serves to counteract the diffusion of CO.sub.2 and SO.sub.2 from the air into the concrete, and the damage to the concrete that is attendant on such diffusion.
Claims37
A dry mortar mixture for preparing a corrosion resistant coating on surfaces of concrete structures, consisting essentially of:
- at least one inorganic bonding material selected from the group consisting of cement, lime and mixtures thereof;
- from about 2 to 75 weight % relative to the weight of said dry mortar mix of a coarse grain size portland cement clinker;
- from about 1 to 60 weight % relative to the weight of said dry mortar mix of a plastic in powder form, adapted to be dispersed or dissolved in liquid, said plastic having a T.sub.max value of less than -5.degree. C.;
- and
- an effective amount of a pore forming additive to increase resistance to frost or ice-melting salts.
Dependencies are inferred from the claim text.