Hexavalent chromium-free slurries are provided that are capable of achieving a full cure at temperatures as low as 330-450 degrees F., thus making the coatings especially suitable for application on temperature sensitive base materials. The slurries are suitable in the production of protective coating systems formed by novel silicate-based basecoats that are sealed with novel phosphate-based topcoats. The coating systems exhibit acceptable corrosion and heat resistance and are capable of replacing traditional chromate-containing coating systems.

The present invention is related to materials of construction in the technical field of architecture and civil engineering, known as construction material for masonry; specifically, it is a compound made with a mixture of biodegradable cellulose matrix which is obtained from recyclable materials through an innovative method. Such compound, reaches higher resistance to compression in comparison to the known quality standards, even thought the resultant clusters, blocks or bricks, etc., are lighter due to their high cellulose content. This compound might be used, but not limited to, as raw material to produce hollow bricks, blocks, clusters and other conglomerates to build houses and buildings.

A cementitious blend composition and a concrete mix composition preferable for making concrete resistant to high temperatures and alkaline conditions, particularly for making durable concrete for constructing an alumina digester tank in an aluminum smelter. The cementitious blend composition includes at least one hydraulic cement, silica fume (SF), and natural pozzolan (NP), wherein a weight percent ratio of at least one hydraulic cement:SF:NP in the cementitious blend composition lies in the range of (24-63):(5-44):(32-40) with the sum of the weight percentages of the at least one hydraulic cement, the SF, and the NP not exceeding 100%. The concrete mix composition comprises water and the cementitious blend composition, wherein a weight ratio of the water to the cementitious blend composition is 0.2-0.5, and wherein the concrete mix composition has a content of the cementitious blend composition of 400-550 kg/m.sup.3.

A fireproof, translucent, flexible coated fabric composite material for use in fire curtains. The composite material meets or exceeds regulatory requirements in terms of fire endurance and allows transmissivity of necessary amounts of light. The process of the present disclosure combines a silica fabric with a special refractory index controlled resin. This unique combination of materials can transform an opaque high temperature fabric into a translucent, and even transparent, composite which as the ability to resist high temperature, flame and smoke penetration that fills a needed gap in technology between visibility and fire resistance in the field of fire and smoke curtains used in civil construction.

A sulfur concrete has constituents that include a coarse aggregate in an amount in a range of 40-50 wt % of the weight of the sulfur concrete, a fine aggregate in an amount in a range of 20-40 wt % of the weight of the sulfur concrete, a fine filler in an amount in a range of 8-12 wt % of the weight of the sulfur concrete, and a binder in an amount in a range of 12-20 wt % of the weight of the sulfur concrete. The binder includes elemental sulfur in an amount in a range of 25-60 wt % of the weight of the binder and asphalt in an amount in a range of 40-75 wt % of the weight of the binder.

A powder adhesive composition having cement, a dispersible polymer powder; and at least 10% volume of the powder adhesive is an expanded perlite. The cement is at a ratio of between 600-1000% of the mass of the expanded perlite. The powder adhesive composition is an adhesive, and the adhesion strength of the adhesive, is over 0.4 MPa, after 28 days, and after water immersion for at least 20 days.

The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide.

The present invention relates to a process for producing a foam ceramic comprising the steps: producing an aqueous suspension of a first mineral raw material; foaming the suspension with air while adding a foaming agent and a binder to form a light foam; mixing the light foam with a powder or slip of a second ceramic raw material to form a heavy foam; pouring the heavy foam into a mold; drying the molded heavy foam in the mold to form a solid foam; and firing the solid foam in the mold to form the foam ceramic.

A coated insulation material comprising an insulation material substrate and a coating on at least part of a surface of the insulation material substrate and wherein the coating comprises 20 to 65 wt % alkali silicate based on the total weight of the cured coating and the alkali silicate comprises potassium silicate. Also described is an aqueous coating composition useful in providing the insulation material coating, a potassium silicate coating, methods of producing the coated insulation material and potassium silicate coating and kit of parts including an insulation material substrate and either the aqueous coating composition or the potassium silicate coating.

A building material comprising an inorganic binder a reactive silicon source a reactive calcium source.