A method for improving the performance of fracturing processes in oil production fields may rely on polymer coated particles carried in the fracturing fluid. The particles may include heavy substrates, such as sand, ceramic sand, or the like coated with polymers selected to absorb water, increasing the area and volume to travel more readily with the flow of fluid without settling out, or allowing the substrate to settle out. Ultimately, the substrate may become lodged in the fissures formed by the pressure or hydraulic fracturing, resulting in propping open of the fissures for improved productivity.

Hydraulic fracture composition and method

PROBLEM TO BE SOLVED: To provide water-permeable concrete which has a high permeability coefficient and high compressive strength and can easily be shaped. SOLUTION: The production process of the water-permeable concrete comprises: charging a mixed material of a composition consisting of 100 pts.vol. of coarse aggregate and 30-80% pts.vol. of paste or mortar, into a form to obtain a formed body; and curing the formed body; wherein the paste or mortar comprises 100 pts.wt. of cement or a powdery mixture containing cement, 0-300 pts.wt. of fine aggregate, 0.1-3.0 pts.wt. (expressed in terms of solid content) of a water reducing agent or AE water reducing agent (air entraining and water reducing agent) and 20-40 pts.wt. of water. COPYRIGHT: (C)2003,JPO

Water permeable concrete

The invention discloses a concrete admixture for a permeable pavement of a road. The concrete admixture is prepared from the following components in parts by weight: 50 to 80 parts of a water reducer,5 to 15 parts of asbestos powder, 8 to 25 parts of silicon dioxide, 8 to 15 parts of stearic acid, 2 to 9 parts of methyl cellulose, 4 to 11 parts of diethylenetriamine and 8 to 20 parts of silicon carbide. By adopting the concrete admixture for the permeable pavement of the road, disclosed by the invention, the strength of concrete can be improved and the durability of the concrete is increased;the water permeability and the air permeability of the pavement are improved.

Concrete admixture for permeable pavement of road

A concrete composition and method include a portion of fine aggregate bearing a coating of a polymer, which may be a continuous coating layer or a layer of powdered, discrete particles embedded in a binder. The polymeric coating may be a super absorbent polymer (insoluble in water, but absorbing water), or another polymer such as the acrylamides, co-polymers thereof, polyacrylamides, or the like (soluble in water). The coating absorbs water, but particles are too small to form significant voids. Water is absorbed into the concrete mix in far greater proportions (e.g. w/c ratio over 0.5) improving workability, doubling workability time, and improving ultimate compressive stress (strength).

Coated-fine-aggregate, concrete composition and method

The invention discloses a special additive for high flexural strength concrete The special additive is prepared from the following components in parts by weight: 20-30 parts of hydroxypropyl methyl cellulose, 20-30 parts of polyacrylamide, 3-5 parts of ferrous sulfate, 3-5 parts of ferric nitrate, and 30-54 parts of bentonite; all of the components are 100 parts in total The special additive has the advantages that the prepared special additive can improve the concrete toughness through a high-molecular polymer, improve the concrete compactness through gel filling, and ensure the internal humidity of the concrete through a water storage material, thereby improving the flexural compression ratio of the concrete; the concrete with relatively high flexural strength can be prepared with relatively low cementing material consumption

Special additive for high flexural strength concrete

PROBLEM TO BE SOLVED: To easily produce a high strength water permeable concrete excellent in water permeability. SOLUTION: The water permeable concrete is produced using 100 pts.wt. powder of cement or the like, 0-100 pts.wt. fine aggregate, 400-600 pts.wt. coarse aggregate, 0.1-1 pt.wt. thickening additive comprising a mixture of a water-soluble cellulose ether and water-soluble polysaccharides in a weight ratio of 10:90 to 30:70, 0.3-15 pts.wt. organic polymer, 0-1 pt.wt. water-reducing agent and 20-50 pts.wt. water. The surfaces of the aggregates are previously coated with water or an emulsion of the organic polymer or the like. COPYRIGHT: (C)2000,JPO

凱晴松永

Papers

Thickening additive for water permeable concrete and production of water permeable concrete using same

凱晴 松永

Papers

Thickening additive for water permeable concrete and production of water permeable concrete using same

凱晴松永