Method for preparing functional permeable material from multi-source solid waste

Abstract

The invention relates to a method for preparing a functional permeable material by using multi-source solid waste, which comprises the following specific steps: fully and uniformly stirring high-activity sludge, high-activity iron tailing powder, coal gangue powder, blast furnace slag, gypsum, ammonium bicarbonate and medical stone powder, then preparing into spheres with the particle size of 4.75-9.5 mm by using a pelletizer, and curing to obtain unfired aggregate; adding the unfired aggregate and part of water into a stirrer, uniformly stirring and mixing, then adding the cement, magnesium fluosilicate and sodium silicate, fully stirring, finally adding the water reducing agent, redispersible latex powder and residual water, uniformly mixing, taking out the obtained mixture, compacting, and curing to obtain the functional permeable material. The functional permeable material is prepared from the low-carbon unfired aggregate, the solid waste resource utilization rate is high, the preparation cost is low, the energy consumption in the preparation process is low, the preparation process is simple, and the functional permeable material has great application prospects in sponge city construction.

Description

technical field [0001] The invention belongs to the technical field of porous mortar, concrete, artificial stone or ceramic products, and relates to a method for preparing functional permeable materials by using multi-source solid waste. Background technique [0002] During the development of urbanization in my country, the discharge of waste such as silt and iron tailings is very large. In most areas of my country, silt is usually stored in a centralized manner, and it will be restored after natural evaporation, consolidation and settlement to form the land. secondary pollution. Similarly, the stockpiling of iron tailings not only takes up a lot of land resources, but also destroys the local ecological environment. [0003] The resource utilization of silt and iron tailings to prepare permeable concrete and other materials can be used to build a "sponge city" with natural accumulation, natural infiltration, and natural purification, and solve problems such as rainstorm wat...

AI Technical Summary

Problems solved by technology

There are still some problems in the above research, for example: the unfired ceramsite prepared by mud base uses a large amount of cementitious materials, the cost is high, and the dissolution of organic matter in the sludge is not considered, and the dissolution of organic matter will affect the strength of unfired ceramsite

The resource utilization of iron tailings uses a large amount of cementitious materials, low strength, low resource utilization rate, and high utilization cost

The aggregate raw materials of the above-mentioned permeable materials are mostly natural sand and gravel, which damages the environment, and the prepared permeable materials have a high bulk density, which is not conducive to construction. The water permeability coefficient is low and the clogging rate of the permeable materials is high.