This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

A hybrid magnesium cement composition formed from an A-side component and a B-side component. The A-side component includes an A1-component including a light-burn grade magnesium-containing material, and an A2-component including a non-metallic oxide salt. A B-side component having a metal silicate polymer is included.

Provided herein are compositions and their methods of use to adhere (e.g., in wet and dry environments) a variety of materials together.

Provided is a ternary inorganic compound crystal having a molecular formula of Ca.sub.8Al.sub.12P.sub.2O.sub.31, and a preparation method thereof comprising the following steps: weighing calcium salts, aluminum salts and phosphate respectively according to the molar ratio of calcium, aluminum and phosphorus in the molecular formula Ca.sub.8Al.sub.12P.sub.2O.sub.31; calcining at 15501570 C., cooling, and grinding to obtain the ternary inorganic compound crystal. Also provided is an application of the ternary inorganic compound in gelling materials and molecular sieves, nonlinear optical crystals, and photochromic materials.

A discovery of the conversion of amorphous calcium polyphosphate (ACPP) or/and other polyphosphate salts with various type of calcium phosphate to new calcium phosphate product (i.e. dicalcium phosphate dihydrate (DCPD)) in a liquid environment. The discovery includes mixing a various type of calcium phosphate with an aqueous ACPP or/and other polyphosphate salts gel, which is fast setting and possessing strong mechanical strength, and can be gradually converted to DCPD/hydroxyapatites in physiological condition. This injectable past can be applied as alternative of conventional CPC bone cement that is suitable for bone void repair due to its excellent properties in osteoconductivity and osseointegration. It can also be applied as drug delivery device in tissue engineering for its strong bonding to drug molecules.

Refrigerated hydraulic cement compositions comprise a mixture of (a) -tricalcium phosphate powder, (b) monocalcium phosphate comprising monocalcium phosphate anhydrous (MCPA), monocalcium phosphate monohydrate (MCPM), or a combination thereof, wherein a 0.1 g/ml saturated aqueous solution of the monocalcium phosphate has a pH less than 3.0, (c) non-aqueous water-miscible liquid, and (d) an aqueous hydrating liquid. The aqueous hydrating liquid is included in an amount of about 1-50 volume percent, based on the combined volume of the non-aqueous water-miscible liquid and the aqueous hydration liquid, and the refrigerated hydraulic cement composition is storage stable for greater than one day, without setting. Methods of forming hardened cements in vivo and/or for forming implants for use in vivo employ the hydraulic cement compositions.

Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods make use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO.sub.2 emission associated with cement production.

A castable refractory composition comprises: a cement-free refractory particulate composition; and a sol binder; wherein the castable refractory composition comprises a metaphosphate-providing component and/or an orthophosphate-providing component.

A castable refractory composition comprises: a cement-free refractory particulate composition; and a sol binder; wherein the castable refractory composition comprises a metaphosphate-providing component and/or an orthophosphate-providing component.

A calcium phosphate cement composition that includes the following two components: A) one or several calcium phosphate powders suspended in an aqueous solution including inhibitor cations inhibiting a reaction of the calcium phosphate powders with water, the inhibitor cations being selected from Mg.sup.2+, Sr.sup.2+ and Ba.sup.2+ at a concentration greater than 0.01 M; and B) an aqueous solution including Ca.sup.2+ cations at a concentration greater than 0.1 M. This calcium phosphate cement compositions can be safely stored for years yet still retain its full reactivity when mixed.