The cement mortar composition for the cross section enforcement is provided to improve the mechanical and chemical strength corresponding to the impairing factor. The cement mortar composition comprises the Portland cement of 20~40 wt%, the inorganic expander of 3~10 wt%, the alumina cement of 5~30 wt%, the silica of 35~60 wt%, the zirconium(Zr) of 3~8 wt%, the fiber of 0.2~2.5 wt%, the polymer of 0.5~5.0 wt%, the reactivity control liquid of 0.3~2.0 wt%, the water repellent of 0.1~1.0 wt% and the surfactant of 0.3~2.0 wt%. The surfactant is one selected from the melamine system, the naphthalene system, and the carboxyl system. The fiber is selected from the nylon, polypropylene acryl, acryl amide, cellulose, PVA, and the steel. The reactivity control liquid is selected from the citric acid, sodium gluconate, tartaric acid, fluoride, methyl cellulose, ethylcellulose and the boric acid.

Composition of cement mortar for reinforcing of section and method of using thereof

The invention discloses a plaster block and preparing method through chemical plaster and industrial waste material, which is characterized by the following: the chemical plaster is allocated by anhydrous gypsum with different hydrating speeds and hydrated crystal structures at 2: 1-3: 1 into semi-plaster through frying; the rate of cement in the hydrating course and anhydrous gypsum rate in the micro-bulking course is 1:12-1:3; the air-entrainer is added in the raw material, which generates dispersing micro-bubble without light-weight aggregate.

Gypsum building block manufactured by chemical gypsum and industrial waste and manufacture method thereof

Gegenstand der Erfindung sind saureresistente, hydraulisch abbindende Massen auf der Basis von a) Huttensand, b) ein oder mehrere Puzzolane, c) ein oder mehrere Fullstoffe, d) einem oder mehreren Polymerisaten auf der Basis von ethylenisch ungesattigten Monomeren, sowie Wasser

Säureresistente, hydraulisch abbindende massen

The invention relates to a hybrid fiber toughened ultrahigh-strength and ultrahigh-ductility cement-based material which comprises the following ingredients in parts by weight: 700-1250 parts of 525 ordinary Portland cement, 200-300 parts of silica fume, 200-750 parts of mineral powder, 400-500 parts of quartz sand, 200-230 parts of water, 20-30 parts of a polycarboxylic acid high efficiency waterreducer, 5-20 parts of ultra-high molecular weight polyethylene fiber and 39-117 parts of ultrahigh-strength steel fiber. Compared with the prior art, the cement-based composite with maximum compressive strength of 200MPa, direct tension strength near 15MPa, tensile ductility near 10% and slump of greater than 180mm is obtained by mixed use of the ultra-high molecular weight polyethylene fiber and the steel fiber, and can be pumped and cast in place.

Hybrid fiber toughened ultrahigh-strength and ultrahigh-ductility cement-based material

The invention relates to acid-resistant, hydraulically setting masses based on a) slag sand, b) one or more pozzolanas, c) one or more fillers, d) one or more polymers based on ethylenically unsaturated monomers, and water.

Acid-resistant, hydraulically setting masses

PURPOSE: A method for preparing acid resistant restoration mortar and a composition thereof are provided to improve the chemical resistance as well as physical properties of a concrete construction which is restored with the composition, wherein the physical properties include compression and bend strength, waterproofness and saline water resistance, thereby improving the durability of the restored concrete construction. CONSTITUTION: The method for preparing acid resistant restoration mortar comprises: (1) a step of preparing an ultra-fine slag admixing powder of sludge from sewage comprised of: adding 5-10pts.wt of clay or pumice to 80-90pts.wt of sludge having 10% or less of a water content; firing the mixture in a rotary kiln at 1300-1500deg.C to give a sludge slag; adding thereto 1-5pts.wt of anhydrite; and milling the resulted product with a ball mill to have a fineness of 4000-8000cm2/g; and (2) a step of preparing acid resistant restoration mortar comprised of mixing 50-80pts.wt of the prepared slag admixture; 10-30pts.wt of Portland cement; 35-55pts.wt of an inorganic binder; 1-5pts.wt of an acrylic or styrene-butadiene copolymer resin composition; 0.1-0.5pts.wt of a lignosulfonate type or a sulfonated naphthalene formaldehyde condensate type surfactant; 0.01-0.03pts.wt of a thickener selected from methyl cellulose, ethyl cellulose or polysaccharide compound; 0.05-0.1pts.wt of polyethylene fiber; and 45-60pts.wt of silica fiber having 40-60pts.wt of 1Denier fiber and 40-60pts.wt of 2Denier fiber.

Hong Seong Yun

Papers

Method for preparing acid resistant restoration mortar with chemical resistance and composition thereof