A kind of active powder concrete and preparation method thereof

Abstract

The invention provides reactive powder concrete. The reactive powder concrete comprises the following components in parts by weight: 30-40 parts of dry powder phase, 1-5 parts of water, and 1-5 parts of reinforced fiber, wherein the dry powder phase comprises the following components in parts by weight: 75-85 parts of cement, 24-28 parts of silica fume, 130-150 parts of hill sand, and 0.4-0.8 part of water reducer, and the reinforced fiber is steel fiber. The reactive powder concrete has high strength without being steamed, so that the construction maintenance cost can be lowered; the hill sand frequently-used in a construction site is used as aggregate, thus lowering the material cost and being beneficial for engineering application of the concrete; by regulating the proportion, the concrete has high fluidity, thus being free of vibration in construction, and improving convenience in construction. The reactive powder concrete can be used for manufacturing key bearing elements in the structure and can improve the durability and bearing capacity, can be used in the structure alone for reducing the dead weight of the structure, lowers basis cost and total structure cost, and also has application value in outer coating and reinforcing and repairing of the structure.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an active powder concrete and a preparation method thereof. Background technique [0002] Cement is widely used in the current construction field, and it is also the most used man-made material. Since the reform and opening up, with the expansion of economic construction scale, my country's cement industry has developed rapidly, and the output of cement has ranked first in the world for many years. According to the statistics of relevant departments, in 2012, my country's annual cement output has exceeded 2 billion tons, accounting for about 60% of the world. Traditional Portland cement is prepared by using limestone, clay and other raw materials through a production process of two grindings and one firing. The calcination temperature is as high as 1450°C, and a large amount of CO will be emitted during the production process. 2 , consumes a large amount of electricit...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high cost, complex maintenance methods for maintenance facilities, and difficulty in self-compacting in the actual application process of reactive powder concrete, and provide a low-cost, simple process and wide raw material source reactive powder concrete ratio; the present invention The invention also provides a preparation method for the above-mentioned fly ash-based geopolymer