Water-milled colored pavement brick made of recycled aggregate from construction waste and preparation method thereof

Abstract

The invention discloses a construction waste recycled aggregate water milled colorful paving brick and a preparation method thereof, and belongs to the field of building materials. The colorful paving brick is prepared by the following raw materials in parts by weight: 200-260 parts of fine aggregates, 60-80 parts of rough aggregates, 5-10 parts of aggregate modifier, 30-80 parts of nanometer silicon dioxide, 50-70 parts of polyamide, 0.3-0.5 parts of water reducing agent, 100-140 parts of cement and 40-70 parts of water. The product adopts construction waste recycled aggregates as the main raw material, thus being naturally multicolored, reducing processes and expenses for doping stones and pigments, beautifying the environment, reducing cost and saving natural resources. Meanwhile, the invention also provides a preparation method of the water milled colorful paving brick, the preparation method is simple in process, the prepared product is high in permeability performance and mechanical performance, and strong in ultraviolet ray and thermal radiation absorbing ability, and reduces urban heat island effect in the summer.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a water-milled colored pavement brick made of recycled aggregate from construction waste and a preparation method thereof. Background technique [0002] Construction waste is the main component of urban waste, accounting for about 30%-40% of the total urban waste. In 2004 alone, my country produced about 6 billion tons of construction waste, and the data from 2008 to 2011 must be far greater than this number. At present, construction waste is mainly treated by traditional open-air stacking and deep excavation and landfill. Although this method has a large processing capacity, is convenient and simple, and has low processing costs, it actually occupies a large amount of land resources and produces irreversible environmental pollution. If such a large amount of construction waste cannot be recycled in time, it will not only pollute the environment, but also cause a se...

AI Technical Summary

Problems solved by technology

At present, construction waste is mainly treated by traditional open-air stacking and deep excavation for landfill. Although this method has a large processing capacity, is convenient and simple, and has low processing costs, it actually occupies a large amount of land resources and produces irreparable environmental pollution.

If such a large amount of construction waste cannot be recycled in time, it will not only pollute the environment, but also cause a serious waste of resources.

[0003] On the other hand, with the acceleration of the urban process and the continuous improvement of people's aesthetic methods, colored pavement bricks are widely used in the construction of modern towns, and various pavements are laid on sidewalks, parking lots, squares, green belts and other places. Colored pavement bricks, but the common characteristics of these colored pavement bricks are poor water permeability, low compressive strength, and no anti-ultraviolet radiation effect. At the same time, various pigments are added in the preparation process of these colored pavement bricks , while increasing the aesthetics, it also increases the production cost

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