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.

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.

Lightweight construction panels, such as gypsum plaster-board, are commonly used to provide internal partitions in buildings It is known to cover, either partially or fully, the panel with an aqueous material such as gypsum plaster or jointing compound. It has been found that known panels expand when they absorb water. This gives rise to several undesirable results such as the gypsum plaster or jointing compound cracking as the panel expands as moisture is absorbed. The present invention provides a panel comprising a gypsum matrix including fibres in an amount of at least 0.8 wt % relative to the gypsum, a polymeric additive in an amount of at least 0.8 wt % relative to the gypsum, and at least one phosphate additive. A panel having such a composition has been found to have desirable characteristics.

Lightweight construction panels, such as gypsum plaster-board, are commonly used to provide internal partitions in buildings It is known to cover, either partially or fully, the panel with an aqueous material such as gypsum plaster or jointing compound. It has been found that known panels expand when they absorb water. This gives rise to several undesirable results such as the gypsum plaster or jointing compound cracking as the panel expands as moisture is absorbed. The present invention provides a panel comprising a gypsum matrix including fibres in an amount of at least 0.8 wt % relative to the gypsum, a polymeric additive in an amount of at least 0.8 wt % relative to the gypsum, and at least one phosphate additive. A panel having such a composition has been found to have desirable characteristics.

What are described are the use of a refractory coating composition for production of cores for diecasting, a kit for production of cores for use in diecasting, a method of producing cores for use in diecasting, cores for use in diecasting, and the use of such cores in diecasting, especially of lightweight metals

What are described are the use of a refractory coating composition for production of cores for diecasting, a kit for production of cores for use in diecasting, a method of producing cores for use in diecasting, cores for use in diecasting, and the use of such cores in diecasting, especially of lightweight metals

A use of a thiosulfate as a retarder for a cement paste comprising a magnesium phosphate cement.

A use of a thiosulfate as a retarder for a cement paste comprising a magnesium phosphate cement.

Corrosion mitigating cement compositions and methods for their preparation are provided. The cement compositions are derived from self-cementing pozzolans and chemical accelerators, retarders, mechanical strength modifiers and corrosion inhibitors. The corrosion inhibitors include boron compounds such as boric acid. Concretes prepared using the cement compositions possess low conductivity and a conductivity which further decreases with aging.

Corrosion mitigating cement compositions and methods for their preparation are provided. The cement compositions are derived from self-cementing pozzolans and chemical accelerators, retarders, mechanical strength modifiers and corrosion inhibitors. The corrosion inhibitors include boron compounds such as boric acid. Concretes prepared using the cement compositions possess low conductivity and a conductivity which further decreases with aging.