A full-fiber burner brick and a preparation method thereof, comprising mixing alumina crystal fiber and amorphous ceramic fiber with both of them being a combination of fibers of different lengths gradations, and moreover adding fine powder fillers of different particle size gradations and supplementing other additives. This enables the internal structure of the product more uniform, increases the bulk density of the product, and also benefits the suction filterability of fiber cotton blank, and is conducive to forming and improving the strength of the blank. The surface of the brick body is further provided with a coating, which can effectively protect the cotton fiber of the brick body fiber from harsh environments, improve its high temperature resistance, and help to extend the service life of the burner brick.

A method for producing carbon or graphite foam parts with high purity level for high-temperature insulation under vacuum or protective gas, as insulating material or as filter material, includes the following steps: introducing dry, foamable starch (1) into an open-top container (2) having a round or angular cross section, until the base (3) of the container (2) is covered amply and uniformly with starch (1); introducing the container (2) partly filled with starch (1) into an oven (4), and heating the container (2) to a foaming temperature of >180° C. over a prolonged period of several hours to foam the starch (1), until the container (2) has filled completely with carbon foam (6); withdrawing the container (2) from the oven (4) and extracting the carbon foam (6) after sufficient cooling, and optionally portioning the carbon foam (6) into carbon foam parts (6.1).

A product includes an aerogel having a single bulk structure, the single bulk structure having at least one dimension greater than 10 millimeters. The single bulk structure includes a plurality of pores, where each pore has a largest diameter defined as a greatest distance between pore walls of the respective pore. In addition, an average of the largest diameters of a majority of the pores is within a specified range, and the plurality of pores are distributed substantially homogenously throughout the single bulk structure.

The invention relates to a potting paste composition for honeycomb reinforcement having improved fire retardancy characteristics. The potting paste composition comprises (a) a curable polymer; (b) a curing agent for the curable polymer; (c) a fire retardant comprising an ammonium polyphosphate in combination with an ingredient selected from the group consisting of metal hydroxides, expandable graphites, liquid phosphate esters, phosphorous organic compounds or salts thereof, and zeolites; and(d) a filler selected from the group consisting of polymeric microspheres, hollow glass microspheres, and thixotropic fillers; wherein the potting paste has an uncured density determined by the method according to EN ISO 1183 of not more than 0.7100 g/cm.sup.3, preferably of at most 0.680 g/cm.sup.3, more preferably of at most 0.673 g/cm.sup.3, still more preferably of at most 0.660 g/cm.sup.3, even more preferably of at most 0.658 g/cm.sup.3, yet more preferably of at most 0.653 g/cm.sup.3 and in particular of at most 0.620 g/cm.sup.3; and wherein the total content of the fire retardant is at least 5.0 wt.-%, preferably at least 10 wt.-%, more preferably at least 15 wt.-%, relative to the total weight of the potting paste composition.

Disclosed is a new composite material comprising nanocellulose and hemp or a hemp-derived component, such as pure hemp, hemp bast fibers, hemp inner fibers, hemp shives, hemp leaves, hemp seeds, or ground hemp. The nanocellulose may be hydrophobic or hydrophilic, and may include cellulose nanocrystals, cellulose nanofibrils, cellulose microfibrils, or a combination thereof. This invention provides construction blocks or panels; engineered parts; fire-resistant objects; coatings; containers; textile compositions; and fabric materials, for example. The composite material may also include one or more additives to modify mechanical, thermal, chemical, and/or electrical properties. The addition of nanocellulose can improve the mechanical properties of hemp-containing concrete mixtures to improve compressive strength for construction purposes.

A continuous flexible cement sheet roll for coating construction slabs, is disclosed. The sheet comprising a flexible cement layer, which has a thickness of between 0.3 to 6 mm, such as between 0.5 and 5 mm, and which comprises a) essentially inorganic mortar and b) up to 15% polymeric binder. When the amount of a component in a mixture is expressed in % units, the weight % of the component relative to the weight of the whole mixture is intended. The flexible cement sheet roll of the invention comprises, a reinforcing layer of a thickness lower than the thickness of said cement layer, selected from films of a nonwoven fabrics, layers of organic or inorganic fibers, polymer webs, chop strand mat, and fiberglass mats, among others.

Decorative panel, in particular a floor panel, ceiling panel or wall panel, including a core layer having an upper side and a lower side, a decorative top layer connected to said upper side of the core layer, a first panel side edge including a first coupling profile, and a second panel side edge including a second coupling profile designed to interconnect with a first coupling profile of a second, identical panel, both in horizontal direction and in vertical direction. The core layer includes a layer of foam concrete which is constituted by a matrix of concrete material in which air pockets in the form of cells are present.

Described are a composition comprising furfuryl silicates and furfuryl alcohol, especially for use as acid-curable binder, and processes for producing such a composition.

The present invention relates to a composition in the form of a mixture comprising F-type fly ash, a reactive silicon source, a setting accelerator and a light aggregate with a density of less than 900 kg/m.sup.3 and a mechanical strength of at least 0.08 MPa, and the uses thereof to obtain light and fireproof construction materials.

A fire-proof material, in particular a fire-proof thermal insulation material containing water glass, which is composed of a compound which contains 34 to 49.9 wt % of inorganic non-flammable fibres, 50 to 65 wt % of an aqueous silicate solution, and 0.1 to 1 wt % of water glass stabiliser, while it further contains a water glass hardener and the aqueous silicate solution has a density in the range of 1370 to 1400 kg/m.sup.3 and a molar ratio of SiO.sub.2 to Na.sub.2O in the range of 3.2 to 3.4.