Recycled aggregate concrete and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses recycled aggregate concrete and a preparation method thereof. The recycled aggregate concrete is prepared from the following components in parts by weight: 300 to 340 parts of cement, 150 to 160 parts of water, 85 to 100 parts of fly ash, 65 to 85 parts of mineral powder, 600 to 650 parts of sand, 960 to 1000 parts of stones, 8 to 10 parts of a water reducing agent, 10 to 13 parts of a preservative and 320 to 360 parts of recycled aggregate, the preparation method comprises the following steps: S1, uniformly mixing the cement, the water, the fly ash and the mineral powder to obtain a premixed mixture; and S2, adding the recycled aggregate, the stones, the sand, the water reducing agent and the preservative into the premixed mixture, and uniformly mixing. The recycled aggregate concrete disclosed by the invention has the advantages of strong scouring resistance, good chloride ion corrosion resistance and excellent durability when being used for ocean engineering construction.

Description

technical field [0001] The application relates to the field of building materials, more specifically, it relates to a recycled aggregate concrete and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and the advancement of urbanization in various places, a large number of concrete buildings have been demolished due to their service life, or have been rebuilt and expanded due to municipal construction needs, resulting in a large amount of construction waste. The current construction waste treatment Most of them are open-air or landfilled. At the same time, with the rapid development of my country's marine economy, the marine transportation industry has developed rapidly. The new construction and expansion of many coastal port buildings require a huge number of concrete components. [0003] The hard inorganic components that exist in large quantities in construction waste are processed into recycled aggregates through...

AI Technical Summary

Problems solved by technology

[0004] In coastal areas, because the ocean engineering components are farther from the surface and are affected by the tides every day, the ocean engineering components will be scoured for a long time, and due to the excessive exploitation of groundwater in the city, the phenomenon of seawater intrusion is becoming more and more serious. Ocean engineering components The seepage scour effect continues unabated, so that marine engineering components will not only be eroded by corrosive ions in seawater, but also seepage scour by seawater, resulting in poor durability of marine engineering components

[0005] In view of the above-mentioned related technologies, the inventor believes that when recycled aggregate concrete is used to prepare marine engineering components, it is susceptible to seepage erosion, cracks are prone to occur on the surface, and the durability is poor

Images