A water permeable court surface comprises a porous substrate (5) on which there is a porous rubber shock layer (3) on which is at least one layer (1,2) of an acrylic composition, wherein the acrylic composition comprises a two pack water based polyurethane.

An elastic gel includes a solid component and a liquid component. The solid component is a polyurethane polymer matrix. The liquid component is a plasticizer. The liquid component includes one or more vegetable oils or chemical derivatives of vegetable oils or a mixture thereof and is comprised in cells of the polyurethane polymer matrix.

A floor pavement structure includes a top layer that seals the floor pavement structure and a PU gel layer. The PU gel layer includes a solid and a liquid component and is positioned between a base material and the top layer. The solid component is a polyurethane polymer matrix. The liquid component is a plasticizer.

The invention relates to a method for producing a polyurethane flooring (129) for a sports field (136), the method comprising: providing (502) reactive components for producing polyurethane, the reactive components comprising an A component (902) being a polyol mixture and a B component (904) being an isocyanate mixture and water (914), the B component comprising: 2,2 Methylendiphenyldiisocyanate (922); diphenylmethane-2,4-diisocyanate (924); diphenylmethane-4,4-diisocyanate (926); and isocyanate prepolymer (932); mixing (504) the reactive components for generating a liquid polyurethane reaction mixture (129); applying (506) the polyurethane reaction mixture (128) to a ground (103) of the sports field before chemical reactions in the reaction mixture have generated a solid polyurethane foam, the polyurethane foam after its solidification to be used as the polyurethane flooring.

A running track includes a reinforced concrete slab base that is poured over and around post-tensioning cables suspended therein. The post-tensioning cables include transverse cables that extend transversely across the base, and lengthwise cable structures extending lengthwise through the base. Each lengthwise cable structure includes a series of individual segments that are joined end-to-end to form respective continuous loops and are individually tensioned. The lengthwise cable structures thus exert compressive forces on the base that are continuous and uninterrupted about the circumferential length of the track. The lengthwise cable segments are joined/tensioned from within voids initially formed within the concrete base and, after tensioning, these voids are filled with concrete to provide a concrete base having a uniform top surface that can also be covered in a running surface.

Methods and compositions for the installation of scientifically engineered and constructed unpaved runways are disclosed herein. The compositions are heterogeneous mixtures produced by blending aliphatic or cyclic organic compounds with binders that chemically react with gravel, aggregate, and soil particles to create permanent bonds, resulting in a strengthened and stabilized surface. When blended into the aggregate of a runway surface, the organic compounds act as a carrier fluid, distributing the binder system evenly so particles of all sizes are thoroughly and uniformly coated with the composition. Once the composition is distributed, an adhesion promoting compound reacts with constituents in the aggregate to increase the formation and strength of chemical bonds between particles.

A multilayer coating comprising a primer coat layer, one or more elastic layer and a top coat layer and having good mechanical properties, and a method of preparing the multilayer coating.

A moisture holding material for blending with fill to form an engineered surface. The moisture holding material includes a first non-woven fabric coated in an aqueous superabsorbent polymer (SAP); a second non-woven fabric; fiber; and a fluff material that are chopped and applied topically within a surface, on various substrates including, but not limited to, rubber, sand, wood chippings, grass, soil, fiber, textile, clay or rock. A portion of the non-woven material is coated with SAP.

A method for producing polyurethane flooring includes providing polyurethane reactive components including a isocyanate component and a polyol component, determining environmental data, determining process parameters for mixing the polyurethane reactive components, wherein the process parameters depend on the environmental data, mixing the foam for the polyurethane flooring by mixing the isocyanate component and the polyol component using a froth foam process with the process parameters, applying a first lane of the liquid foam to a ground, applying a second lane of the liquid foam to the ground, wherein a side edge of the second lane gets in contact with a side edge of the first lane, wherein the process parameter are determined so that the foam of the first lane is not cured before applying the foam of the second lane. Furthermore, the invention relates to an apparatus and a system for producing a polyurethane flooring.

A running track includes a reinforced concrete slab base that is poured over and around post-tensioning cables suspended therein. The post-tensioning cables include transverse cables that extend transversely across the base, and lengthwise cable structures extending lengthwise through the base. Each lengthwise cable structure includes a series of individual segments that are joined end-to-end to form respective continuous loops and are individually tensioned. The lengthwise cable structures thus exert compressive forces on the base that are continuous and uninterrupted about the circumferential length of the track. The lengthwise cable segments are joined/tensioned from within voids initially formed within the concrete base and, after tensioning, these voids are filled with concrete to provide a concrete base having a uniform top surface that can also be covered in a running surface.