A well cementing composition comprises an aqueous fluid, portland cement, styrene-butadiene latex and styrene sulfonate-maleic acid copolymer. The styrene sulfonate-maleic acid copolymer has a molecular weight between 5,000 g/mol and 25,000 g/mol. The composition may be placed in a subterranean well during a primary cementing or a remedial cementing operation.

A well cementing composition comprises an aqueous fluid, portland cement, styrene-butadiene latex and styrene sulfonate-maleic acid copolymer. The styrene sulfonate-maleic acid copolymer has a molecular weight between 5,000 g/mol and 25,000 g/mol. The composition may be placed in a subterranean well during a primary cementing or a remedial cementing operation.

The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg/m.sup.3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.

Spackling and joint compounds with lower shrinkage, better sanding, and fast drying. Methods for repairing walls and ceiling in which the present spackling compound is applied to a variety of substrates, including wallboard, plaster and/or wood. Methods for finishing seams in wall construction in which the spackling/joint compound is used for finishing the seams.

Spackling and joint compounds with lower shrinkage, better sanding, and fast drying. Methods for repairing walls and ceiling in which the present spackling compound is applied to a variety of substrates, including wallboard, plaster and/or wood. Methods for finishing seams in wall construction in which the spackling/joint compound is used for finishing the seams.

An ultra-high performance concrete (UHPC) with waste brick powder and preparation method and application thereof are provided, which relates to the technical field of concrete. The preparation method includes the following steps: stimulating activity of a brick powder by a method of mechanically stimulating activity to obtain waste brick powder; and preparing UHPC according to a mass ratio of cement to waste brick powder of 5:5-7:3 to obtain the UHPC with waste brick powder. The UHPC is prepared by treating waste bricks from construction waste (mechanically stimulating activity) to make waste brick powder with activity, therefore partially replacing cement. The UHPC is applied in a construction field.

A process for producing a mineral foam having water repellent properties includes a) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water, at least one water repellent agent different from organosilicon compound, and Portland cement and the aqueous foam includes a co-stabiliser; b) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and c) casting the slurry of foamed cement and leave the slurry of foamed cement to set.

A process for producing a mineral foam having water repellent properties includes a) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water, at least one water repellent agent different from organosilicon compound, and Portland cement and the aqueous foam includes a co-stabiliser; b) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and c) casting the slurry of foamed cement and leave the slurry of foamed cement to set.

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 aggregate includes a polymeric foam present in a range of about 80 vol % to about 85 vol % of the aggregate. A cementitious matrix is present in a range of about 10 vol % to about 13 vol % of the aggregate. One or more resins are present in an amount of less than about 2 vol % of the aggregate, and one or more reinforcing fibers are present in an amount of less than about 1 vol % of the aggregate.