Ecological concrete water permeable brick based on fly ash lightweight aggregate and preparation method thereof

Abstract

The invention belongs to the field of building materials, and particularly relates to an ecological concrete water permeable brick based on fly ash lightweight aggregate and a preparation method. Thepreparation method comprises the following steps: (1) adding an alkaline activator and water into fly ash and blast furnace slag to obtain slurry, drying and maintaining the slurry, and crushing to obtain the fly ash lightweight aggregate; (2) adding water into the fly ash lightweight aggregate, the gravels, the cement and the calcium enhancer, and uniformly mixing to obtain a mixture; (3) carrying out vibration molding on the mixture to obtain a green brick; and (4) carrying out autoclaved curing on the green brick to prepare the concrete water permeable brick. Based on the fly ash lightweight aggregate, a large amount of industrial solid waste fly ash and blast furnace slag can be consumed, and compared with a traditional concrete water permeable brick, the prepared water permeable bricknot only has good water permeability, but also has water storage capacity, and is more ecological and environment-friendly.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to an ecological concrete permeable brick based on fly ash lightweight aggregate and a preparation method thereof. Background technique [0002] Fly ash is a fine solid particle in the flue gas ash produced by fuel combustion. my country is a large producer of fly ash, with an annual output of 500-600 million tons. If fly ash is not controlled and treated, it will affect the atmosphere, It will affect the water environment and soil environment, which will endanger human health. In addition, in recent years, with the development of modern cities, roads are mostly made of impermeable hardened pavement materials, which has led to an increasingly severe waterlogging situation. However, a series of sponge city policies and measures issued by the government have proposed new solutions to the urban waterlogging problem train of thought. [0003] CN106145880A discloses a fly a...

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Problems solved by technology

[0006] To sum up, some of the main permeable pavement materials currently on the market are mainly industrial solid waste, ceramics and concrete. The permeable bricks prepared by using industrial solid waste have variable quality of raw materials, which leads to instability in the whole process; ceramic permeable bricks require There are a lot of clay resources, and the mining will cause great damage to the environment. In addition, ceramic permeable bricks need to consume a lot of energy during the preparation process, which is costly and polluting; concrete permeable bricks are currently the most widely used permeable materials. Low cost, simple process, but long maintenance period, and because concrete permeable bricks mainly use crushed stones as aggregates, the stone itself has a large density and few pores, so concrete permeable bricks can only rely on the pore channels formed by the direct accumulation of aggregates to provide water permeability. limited storage capacity

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