A cementitious material made from industry accepted precursor materials that will adhere to existing concrete or rock has several exploitable features beyond adhesion. The primary motivation for the invention was a self-adhering thin overlay of quality better or equal to the parent concrete floors is now possible. Structural repair of concrete is possible. There are a range of compositions and exploitable features than can be used to give the product flexibility across many concrete repair applications. This resulting material can demonstrate the low permeability and high strength closer to natural stone materials such as quartz and dolomite rocks than to concrete but intermediate compositions are technically viable as well. The material can be used for high quality precasts.

Hexagonal Boron Nitride (hBN) is a synthetic material that may be used in several applications due to its chemical inertness, thermal stability, and other beneficial properties. hBN composite materials and method for making such composites are described here. In particular composite materials including both functionalized hBN and cement or cementitious materials and methods for making the same are discussed. Such materials may be useful for construction, well cementing (both primary and remedial cementing), nuclear industry, 3D printing of advanced multifunctional composites, and refractory materials.

Hexagonal Boron Nitride (hBN) is a synthetic material that may be used in several applications due to its chemical inertness, thermal stability, and other beneficial properties. hBN composite materials and method for making such composites are described here. In particular composite materials including both functionalized hBN and cement or cementitious materials and methods for making the same are discussed. Such materials may be useful for construction, well cementing (both primary and remedial cementing), nuclear industry, 3D printing of advanced multifunctional composites, and refractory materials.

A process for the production of a mineral foam includes (i) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water and Portland cement; (ii) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; (iii) adding a magnesium salt source before, during or after step (ii); and (iv) casting the slurry of foamed cement and leave it to set.

The invention provides novel methods and novel additive compositions and use thereof in a wide range of concrete production for improving properties of concrete materials, such as durability and aestheticity. The methods and compositions of the invention may be applied in a variety of cement and concrete components in the infrastructure, construction, pavement and landscaping industries.

The invention provides novel methods and novel additive compositions and use thereof in a wide range of concrete production for improving properties of concrete materials, such as durability and aestheticity. The methods and compositions of the invention may be applied in a variety of cement and concrete components in the infrastructure, construction, pavement and landscaping industries.

The invention relates to a cementitious composition suitable to be moulded, in particular injection-moulded, to make a manufactured product with arithmetic average surface roughness Ra not higher than 500 nm and flexural tensile strength not lower than 5 MPa, measured after 28 days of curing, the fluidity of the composition, measured according to the method of standard UNI 7044, being not lower than 185 mm, characterised in that it comprises at least: I. a hydraulic binder II. one or more aggregates III. an anti-shrinkage agent IV. a superplasticiser agent V. fibres VI. water, wherein said fibres are made of an amorphous metal material consisting of an alloy with composition (Fe, Cr).sub.80 (P, C, Si).sub.20 in form of flexible lamellae of length equal to at least 10 mm and elastic modulus equal to at least 80000 MPa, present in the composition in amounts by weight of less than 4% with respect to the weight of the composition.

Various embodiments disclosed relate to compatibilized resin-cement composite compositions and methods of using the same. In various embodiments, the present invention provides a method of treating a subterranean formation that includes placing in the subterranean formation a resin-cement composite composition. The resin-cement composite composition includes a resin, a cement, and a substituted or unsubstituted poly(alkylamine) compatibilizer.

Various embodiments disclosed relate to compatibilized resin-cement composite compositions and methods of using the same. In various embodiments, the present invention provides a method of treating a subterranean formation that includes placing in the subterranean formation a resin-cement composite composition. The resin-cement composite composition includes a resin, a cement, and a substituted or unsubstituted poly(alkylamine) compatibilizer.

A Process for the preparation of a functionalized terpolymer having general formula (I):

##STR00001##

and including the following steps: i) reacting at least one first epoxy compound having general formula (II):

##STR00002## with at least a second epoxy compound having general formula (III):

##STR00003## ii) reacting the terpolymer obtained in step i) with at least one sulphur-containing compound having general formula (IV):

##STR00004## provided that in the general formula (IV) at least one of between R.sub.5, R.sub.6 and R.sub.7 differs from hydrogen and at least one of between R.sub.5, R.sub.6 and R.sub.7, contains one of the following functional groups: COOH, COO.sup.M.sup.+, SO.sub.3H, SO.sub.3.sup.M.sup.+, SO.sub.2H, SO.sub.2.sup.M.sup.+, OPO.sub.3H.sub.2, OPO.sub.3.sup.2M.sup.+.sub.2, PO.sub.3H.sub.2, PO.sub.3.sup.2M.sup.+.sub.2, OH,

The above process allows for terpolymers to be obtained which are soluble in polar solvents such as, for example, water, methanol, ethanol, butanol, acetone or dimethyl sulfoxide. The terpolymers can be advantageously used, for example, as additives for cements.