Sidewalk brick prepared from primary aluminum ash after fine grinding

Abstract

The invention discloses a sidewalk brick prepared from primary aluminum ash after fine grinding. The sidewalk brick is prepared from a variety of raw materials. The raw materials include the components in parts by mass: 50-65 parts of aluminum ash, 5-8 parts of gypsum, 8-12 parts of slaked lime, 10-15 parts of common portland cement, 2-5 parts of silica fume, and 5-10 parts of engineering sand; the content of rock sand crystals is 0.5%-1% of the sum of the mass of the common portland cement and the slaked lime, the content of calcium formate is 0.3%-0.5% of the sum of the mass of the common portland cement and the slaked lime, and the content of a high performance water reducer is 0.5%-1% of the sum of the mass of the common portland cement and the slaked lime, so that the sidewalk brick has high early strength, is not easy to damage during demoulding, and has the compressive strength increased; the sidewalk brick has the characteristic of low production cost due to the utilization ofthe primary aluminum ash waste. The problem of ecological environment affected by aluminum ash accumulation is effectively solved, and the method plays a resource recycling effect and has important practical value.

Description

technical field [0001] The present disclosure generally relates to the field of brick making, specifically relates to the technical field of preparing pavement bricks, and in particular to a pavement brick prepared with finely ground primary aluminum ash. Background technique [0002] With the rapid development of my country's economy, the demand for aluminum continues to increase. my country has become the world's largest aluminum producer. With the wide application of metal aluminum, the production of aluminum ash is also increasing. Aluminum ash is the product of the slag produced in the production process of electrolytic aluminum or cast aluminum after cooling and processing, and it is a renewable resource. At present, the processing method of aluminum ash in my country is mainly based on accumulation. On the one hand, slag piles occupy a large amount of land; [0003] Aluminum ash contains aluminum and a variety of valuable elements, mainly composed of aluminum metal...

AI Technical Summary

Problems solved by technology

Environmentally friendly concrete pavement bricks in the prior art mainly use gravel or sand or cinder as aggregates, but quarrying or sand mining destroys the ecological environment, and the strength of sidewalk bricks made of cinder is not ideal