Method for manufacturing water permeable brick with dredged sediment firing-free aggregate

Abstract

The invention relates to a method for manufacturing a water permeable brick with dredged sediment firing-free aggregate. The method comprises the following steps of (1) screening the dredged sedimentfiring-free aggregate is screened; (2) preparing pretreated firing-free aggregate; (3) manufacturing base layer ingredients; (4) adding water to the base layer ingredients and stirring the mixture; (5) manufacturing face layer ingredients; (6) adding water to the face layer ingredients and stirring the mixture; (7) conducting compression formation with a brick machine; (8) maintaining the manufactured product. The method for manufacturing the water permeable brick with the dredged sediment firing-free aggregate can consume a large amount of dredged sediment, reduces exploitation of natural aggregate, achieves the purposes of recycling and ecological environment protection and meets the demands of the dredging industry; the firing-free method is low in production energy consumption and lessin emission, the produced water permeable brick is low in cost and excellent in performance, the dredged sediment recycling approaches can be widened, the demand of a building material market can bemet, and the urban heat island effect can be well relieved.

Description

technical field [0001] The invention belongs to the technical field of dredging industry and building materials, and relates to the environmental protection utilization of dredged bottom mud, in particular to a method for preparing permeable bricks by utilizing unfired aggregate of dredged bottom mud. Background technique [0002] At present, the demand for building materials in my country is increasing day by day, and as many as 10 billion tons of sand and stone materials are mined for building materials every year, causing serious problems of resource depletion and ecological damage. Therefore, the state issued a number of policies from 2000 to 2013 to encourage the use of waste to prepare building materials and vigorously develop green building materials. In recent years, due to the rapid development of China's dredging industry, nearly 200 million m3 of dredged materials are dumped into the ocean every year. 3 . Dredged sediment is produced by dredging engineering thro...

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Problems solved by technology

At present, the resource utilization of dredged sediment at home and abroad in terms of building materials mostly adopts the sintering method, and although the sintered bricks prepared by the sintering method have a compact structure and high strength, firing requires a lot of energy and consumes a large amount of coal resources every year. The cost control is unfavorable, and the sintering process produces a large amount of CO 2 , affecting the environment