Solid waste-based binding agent for sintered water-permeable brick and preparation method of solid waste-based binding agent

Abstract

The invention provides a solid waste-based binding agent for a sintered water-permeable brick and a preparation method of the solid waste-based binding agent. The solid waste-based binding agent is prepared from the following components in percentage by weight: 7 to 20 percent of CaO, 10 to 18 percent of Al2O3, 50 to 62 percent of SiO2, 2 to 6 percent of MgO, 1 to 5.5 percent of K2O, 1 to 4 percent of Na2O, 0.5 to 4.0 percent of Fe2O3, 0 to 4 percent of B2O3 and 0 to 0.5 percent of ReO. The obtained solid waste-based binding agent is further prepared into a water-permeable brick, the obtained water-permeable brick is good in performance, the water permeation coefficient is larger than or equal to 0.01 cm/s, the compressive strength is larger than or equal to 30 MPa, the breaking strength is larger than or equal to 4 MPa, the mass loss rate after 25 times of freezing and thawing cycles is smaller than or equal to 5%, and the compressive strength loss rate is smaller than or equal to 20%. The porosity, the aperture and the strength of the sintered water-permeable brick are effectively regulated and controlled, the production cost is reduced, effective utilization of wastes is realized, the production cost is greatly saved, and the economic and environmental benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature binders, and in particular relates to a solid waste-based binder for sintered seepage bricks and a preparation method thereof. Background technique [0002] The sintered seepage brick is made of the raw materials of the seepage brick through a series of processes such as crushing, screening, batching, mixing, molding, demoulding, high-temperature firing, etc., to make a road pavement material with water permeability and meeting standards. Sintered permeable bricks can be prepared from various types of solid waste, because most harmful substances will be removed under high temperature calcination, reducing environmental pollution, and heavy metal ions can be solidified in permeable bricks to prevent them from flowing into the soil and urban groundwater. The advantage of using industrial waste to prepare sintered seepage bricks is that the production cycle of seepage bricks is short, and t...

AI Technical Summary

Problems solved by technology

[0003] At present, the binder used in the preparation of sintered seepage bricks is usually prepared from natural mineral raw materials and chemical raw materials. For the preparation of sintered seepage bricks from solid waste, the cost of the binder used in it is relatively high, and mining, mining, etc. are required. The production of chemical raw materials brings a series of environmental problems

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