Environment-friendly ground fine river sand powder concrete

Abstract

The invention relates to the technical field of concrete, and more specifically relates to an environment-friendly ground fine river sand powder concrete. The concrete is prepared by the following raw materials by mass: 590-700 parts of 52.5 grade portland cement with average particle sizes of 30-60 [mu]m; 180-210 parts of ground fine river sand powder with average particle sizes of 5-20 [mu]m, ignition loss lower than or equal to 0.4% and SiO2 content higher than or equal to 93%, 85-100 parts of I grade fly ash with average particle sizes of 10-30 [mu]m, 85-100 parts of mineral powder higher than S95 grade with average particle sizes of 10-30 [mu]m, 1,030-1,200 parts of quartz sand with average particle sizes of 0.16-1.63 mm, 22-26 parts of a high efficiency water-reducing agent with a water-reducing rate higher than 30%, 6-10 parts of a synergist, 7-12 parts of a corrosion inhibitor, 135-165 parts of water and 80-160 parts of copper-coated ultrafine steel fibers with diameters of 0.13-0.20 mm and lengths of 6-18 mm. The concrete is low in comprehensive cost, wide in material source and large in mixing amount of industrial waste materials, has good chemical resistance, good self-compactness, low hydration heat and large adjustment range of workability, and is suitable for manufacturing process requirements of different construction members.

Description

Technical field [0001] The present invention involves the field of concrete technology and is more specifically involved in a green environmental protection fine river sand powder concrete. Background technique [0002] Active powder concrete is a new type of concrete material developed by Western countries such as France and other Western countries in the early 1990s.class.The main principle is to design concrete material components with the principle of accumulation density. By reducing the volume ratio between particles to improve the intensity and density of the interface, the anti -fiber resistance performance is adjusted by steel fiber.At present, the main application promotion level is 200MPA, the performance anti -pressure indicators can reach 120 ~ 200MPa, the resistance of the anti -folding strength can reach 14 ~ 40MPa, the elastic modulus is above 45GPa, the anti -penetration performance is generally above P30, and the 28 -day carbonization test is 0 to 0 to 0 to 0 to...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the existing powder concrete, and provide a kind of green environmental protection fine river sand powder concrete, which replaces the silica fume in the active powder concrete with fine river sand, the price is relatively low, and it is mixed with a large amount of Industrial waste, its concrete performance maintains the ultra-high strength, high toughness, high durability, and volume stability indicators of the original active powder concrete, and at the same time greatly reduces the phenomenon of high heat of hydration and strong cohesion during the production process and enables it to It has self-compacting performance to meet its application in the field of building components

Images