Abstract: A damp proof course article (20) for forming a damp proof course in a substrate (10) is disclosed. The damp proof course article comprises an absorbent member (22) and a damp proof course material absorbed into the absorbent member. The damp proof course material comprises an active agent, wherein the active agent comprises an alkoxysilane.

Abstract: A damp proof course article (20) for forming a damp proof course in a substrate (10) is disclosed. The damp proof course article comprises an absorbent member (22) and a damp proof course material absorbed into the absorbent member. The damp proof course material comprises an active agent, wherein the active agent comprises an alkoxysilane.

Abstract: A process for the production of concrete roofing products of reduced weight loading having a thickness in section of not greater than 15 mm. The process involves forming an asbestos-free cementitious composition comprising (i) lightweight aggregate, (ii) hydraulic cement, (iii) water and (iv) reinforcing fibers in an amount of not more than 4% by weight of the total weight of the composition but the fibers being present in an amount sufficient to provide a reinforcing effect and impact strength in the roofing product, the cementitious composition being capable of being shaped by a roller and slipper method, and thereafter shaping the cementitious composition by the method to provide a shaped extrudate, dividing the extrudate to form sections and curing the sections to provide roofing products, wherein the reinforcing fibers have lengths of 0.5 mm to 20 mm. The impact resistant roofing products are useful as roofing tiles, or a replacement for shingles, shakes and slates.

Abstract: The production of concrete building products having thickness in section of not greater than 15 mm includes forming a cementitious composition containing aggregate, hydraulic cement and water. The composition is shaped by a roller and slipper method to produce a shaped extrudate which is then divided into form sections. The sections are then cured to provide the aesthetically pleasing product. The cementitious composition also contains reinforcing fibres. The building products are used for roofing tiles or replacement of shingles, shakes and slates.

Abstract: An uncured cementitious dough or paste, which is substantially free of particulate components having a diameter greater than 100 microns, said paste comprising in admixture;(a) At least one hydraulic cement;(b) at least one polymer latex, the polymer being present in an amount of 1 to 20 parts by weight per 100 parts of the cement;(c) total water in an amount from 8 to 20 parts by weight of water per 100 parts by weight of cement.A cured cementitious composition may be produced by heating said dough or paste at a temperature of above 100.degree. C. and may be used for products such as roofing elements, for cladding the exterior walls of buildings and other building products.

Abstract: An uncured cementitious composition comprising in admixture:(a) at least one hydraulic cement;(b) at least one reactive water-soluble polymer which is capable of providing a viscous solution in water at low addition levels;(c) water in an amount of from 10 to 25 parts by weight of water per 100 parts by weight of the cement; and(d) a water soluble cross-linking agent capable of effecting chemical cross-links between molecules of the said polymer in the presence of the cement and water.