Preparation method of nano-silica and steel fiber reinforced concrete

Abstract

Belonging to the field of inorganic polymeric materials, the invention discloses a preparation method of a nano-silica and steel fiber reinforced concrete. The method includes: weighing aggregate, cement, a water reducing agent, fly ash, water, nano-SiO2 and steel fiber; adding the nano-SiO2 and the water reducing agent into part of the water, and mixing the substances evenly for standby use; wetting a mixer, then adding coarse aggregate and fine aggregate, performing mixing, then adding the cement and fly ash, conducting mixing, and then incorporating the steel fiber evenly along the mixer impeller rotation direction, performing mixing, then adding the mixture of the nano material, the water reducing agent and part of water, performing stirring, adding the residual water, and conducting mixing, thus obtaining the nano-silica and steel fiber reinforced concrete. By blending a specific amount of fiber and nano material into concrete, the method provided by the invention can prepare thenovel composite material fiber reinforced nano-concrete, which has the characteristics of high ductility, good compactness, good durability, etc., and meets the performance requirements of the concrete for bridge deck pavement.

Description

technical field [0001] The invention relates to the field of inorganic polymer materials, in particular to a preparation method of nano silicon dioxide and steel fiber reinforced concrete. Background technique [0002] As the most widely used building material, cement concrete has many advantages that other materials do not have. For example, high strength, good processability, good water stability and thermal stability, rich raw material resources and easy mixing, so it has been widely used in airport roads, high-grade bridges, etc. In terms of road application, foreign cement concrete pavements account for a large proportion of high-grade highways, reaching 30% in the United States, 25% in Japan, and 50% in Belgium, showing excellent road performance during use and reaching designed service life. In recent years, China's high-grade cement concrete pavement has achieved certain development, but the proportion is still very low. In terms of bridge pavement, with the massi...

AI Technical Summary

Problems solved by technology

On the one hand, due to the lack of comprehensive and thorough research on the road performance of cement concrete in the early stage, on the other hand, people have insufficient understanding of the impact of harsh environments on concrete, and do not pay attention to maintenance and repair after completion, resulting in a large number of problems in bridge deck pavement concrete.

[0004] The shortcomings of cement concrete itself, which is brittle and has low tensile strength, greatly limit its application in bridge deck pavement. In order to solve this problem, the present invention proposes a scheme for compounding concrete materials, and prepares a new type of bridge Concrete for paving

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