Some embodiments are directed to a new castable cement based material containing a special admixture based internal curing system to reduce the shrinkage and avoid the formation of cracks, and method of producing the same.

Expansive cements for use in cementing subterranean wells comprise water, an inorganic cement and one or more particulate materials that swell upon contact with a water immiscible fluid. The cements may further comprise a water immiscible fluid. Such cements are designed to seal microannuli arising from the presence of water immiscible fluids on casing surfaces, borehole wall surfaces or both.

A cement composition containing a fluid loss control agent and a cement, wherein the fluid loss control agent contains a vinyl alcohol polymer and a crosslinking agent, and a swelling percentage of the fluid loss control agent is 200% or more and 3,600% or less.

A pervious concrete composition comprising a superabsorbent polymer, thereby enabling a water/cement ratio of 0.35-0.50. The superabsorbent polymer can be a cross-linked sodium polyacrylate-acrylamide/acrylic acid copolymer. The invention further comprises methods of installing the pervious concrete compositions.

The present disclosure discloses a method of forming self-curing concrete comprising the steps of mixing cement, aggregates, and dry MIL-101(Cr) metal-organic framework (MOF) to form a mixture, incorporating the mixture with water to form wet concrete; and curing the wet concrete. During the curing step, the MIL-101(Cr) MOF adsorbs water to from a surrounding atmosphere. The MIL-101(Cr) MOF is 3-9 wt. % relative to the cement, such that water adsorption by the MIL-101(Cr) MOF enables the wet concrete to self-cure. The present disclosure also discloses a composition for forming concrete, the composition compromising cement, aggregate, water, and MIL-101(Cr) metal-organic framework (MOF), wherein the MIL-101(Cr) is 3-9 wt. % relative to the cement. The present disclosure also discloses a self-curing concrete.

Admixtures for concrete, concrete including admixtures, and methods of making admixtures for concrete and making concrete using the admixtures. Such an admixture includes a dry mixture of a silica-based binder and recycled waste material, the latter including at least one of post-consumer waste and/or post-manufacturing waste containing superabsorbent polymer particles and cellulosic particles. The admixture typically is provided in a dry powder form. The recycled waste material may be absorbent hygiene products, such as disposable diapers and/or feminine hygiene products.

A PVA excellent in resistance to melting at high temperature is provided. The polyvinyl alcohol-based polymer is a saponificated product of a homopolymer composed of a vinyl ester monomer, a copolymer of a vinyl ester monomer and a monofunctional monomer other than the vinyl ester, a copolymer of a vinyl ester monomer and a polyfunctional monomer, or a copolymer of a vinyl ester monomer, a monofunctional monomer other than vinyl ester, and a polyfunctional monomer has a particle size of 50 nm or more at a cumulative frequency of 50% in particle size distribution by dynamic light scattering measurement of a 0.4 mass % aqueous solution of the polyvinyl alcohol-based polymer at 25 C.

This disclosure relates to compositions, materials, and systems including hygromorphic fibers that are useful in the chemical arts, such as in the manufacture of products, such as construction materials and, more particularly, to natural-based construction materials. In particular, the present disclosure relates to systems, materials, and methods for preparing certain natural-based construction materials including hygromorphic fibers configured cooperate with soil.