A multilayer laminate comprising in order, a polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, an adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and an inorganic refractory layer wherein the refractory layer comprises platelets in an amount at least 85% by weight with a dry areal weight of 15 to 50 gsm and has a residual moisture content of no greater than 10 percent by weight.

A method for producing aggregates from non-hardened cement compositions, in particular from concrete or residual concrete, which method includes adding a) a water-absorbing agent and b) a crystallization deactivator to a non-hardened cement composition and mixing until a granular material has formed. The method allows unneeded residues of still liquid concrete to be converted into a practical product, which can then be reused to produce new concrete compositions. The invention further relates to a granulated cement material that can be obtained according to a corresponding method, to the use of the granulated cement material as an additive for cement compositions, and to additive combinations for cement compositions, which additive combinations include a water-absorbing agent and a crystallization activator.

A method for producing aggregates from non-hardened cement compositions, in particular from concrete or residual concrete, which method includes adding a) a water-absorbing agent and b) a crystallization deactivator to a non-hardened cement composition and mixing until a granular material has formed. The method allows unneeded residues of still liquid concrete to be converted into a practical product, which can then be reused to produce new concrete compositions. The invention further relates to a granulated cement material that can be obtained according to a corresponding method, to the use of the granulated cement material as an additive for cement compositions, and to additive combinations for cement compositions, which additive combinations include a water-absorbing agent and a crystallization activator.

Gypsum based compositions, processes for making same, and articles made therefrom. In one example, the gypsum based composition can include about 1.5 wt % to about 3 wt % of a starch, about 11 wt % to about 14 wt % of a paper, about 0.7 wt % to about 2.3 wt % of vermiculite, about 1.3 wt % to about 3 wt % of a plurality of reinforcing fibers, about 7 wt % to about 10 wt % of a binding agent, about 2 wt % to about 4 wt % of perlite, and about 65 wt % to about 75 wt % of a calcium sulfate, where all weight percent values are based on a combined weight of the starch, paper, vermiculite, plurality of reinforcing fibers, binding agent, perlite, and calcium sulfate.

Gypsum based compositions, processes for making same, and articles made therefrom. In one example, the gypsum based composition can include about 1.5 wt % to about 3 wt % of a starch, about 11 wt % to about 14 wt % of a paper, about 0.7 wt % to about 2.3 wt % of vermiculite, about 1.3 wt % to about 3 wt % of a plurality of reinforcing fibers, about 7 wt % to about 10 wt % of a binding agent, about 2 wt % to about 4 wt % of perlite, and about 65 wt % to about 75 wt % of a calcium sulfate, where all weight percent values are based on a combined weight of the starch, paper, vermiculite, plurality of reinforcing fibers, binding agent, perlite, and calcium sulfate.

Disclosed are a mixed shrinkage reducing agent for concrete and a preparation method thereof. The mixed shrinkage reducing agent for concrete includes the following components in parts by weight: 35-45 of alkali modified diatomite, 15-22 of magnesium oxide, 13-20 of vermiculite, 8-11 of borax, 3-9 of sodium hexametaphosphate, and 7-13 of citric acid modified starch. The mixed shrinkage reducing agent for concrete according to the present application is used as an admixture to be mixed into cement for preparing concrete.

Disclosed are a mixed shrinkage reducing agent for concrete and a preparation method thereof. The mixed shrinkage reducing agent for concrete includes the following components in parts by weight: 35-45 of alkali modified diatomite, 15-22 of magnesium oxide, 13-20 of vermiculite, 8-11 of borax, 3-9 of sodium hexametaphosphate, and 7-13 of citric acid modified starch. The mixed shrinkage reducing agent for concrete according to the present application is used as an admixture to be mixed into cement for preparing concrete.

Cured cements, cement slurries, and methods of making cured cement and methods of using cement slurries are provided. The method of making a cured cement comprising: synthesizing nanomaterials via chemical vapor deposition on at least one of cement particles or cement additive particles to form nanomaterial particles, adding the nanomaterial particles to a cement slurry to form a modified cement slurry, and curing the modified cement slurry to form a cured cement, in which the nanomaterials are interconnected and form a conductive web within the cured cement.

Cured cements, cement slurries, and methods of making cured cement and methods of using cement slurries are provided. The method of making a cured cement comprising: synthesizing nanomaterials via chemical vapor deposition on at least one of cement particles or cement additive particles to form nanomaterial particles, adding the nanomaterial particles to a cement slurry to form a modified cement slurry, and curing the modified cement slurry to form a cured cement, in which the nanomaterials are interconnected and form a conductive web within the cured cement.

An investment powder which is safer than conventional powders comprising tricalcium phosphate, and being substantially or entirely free of free silica in the respiratory portion yet providing an overall expansion at 750° C. of 1% or higher sufficient to prevent mould cracking during casting. A method of making a casting comprising forming a slurry by mixing a gypsum bonded investment powder with water, pouring the slurry into a stainless steel flask around a low melting point material model, allowing the slurry to set to define a mould, heating the mould to burn out the model and casting material into the mould wherein the stainless steel flask consists of a 400 series martensitic stainless steel.