Method for preparing organic active concrete by using sludge improvement and modification

Abstract

The invention provides a method for preparing organic active concrete by using sludge improvement and modification. Sludge is deodorized and reacts with an organic synthetic curing agent, then improved sludge, portland cement, fly ash and the like are mixed to obtain the organic active concrete. The method for preparing the organic active concrete by using the sludge improvement and modification has the advantages that the sludge is taken as a raw material, the organic synthetic curing agent is blended in the sludge, then stirring is carried out, the organic synthetic curing agent can decompose and eliminate heavy metal in the sludge, the content of harmful chemical elements in the sludge is reduced, the generated concrete retains a basic structure of sludge soil body, nutritional ingredients required for plants in the concrete are increased, thereby having a good growth effect on the plants, and the organic active concrete also has insect resistance, air permeability, durability and bearing performance; the preparation technology of the concrete is simple, the production cost is low, the problem of arbitrary discharge and hoarding of the sludge is solved, the recycling use value of the sludge and agricultural soil quality are improved, the growth conditions of the plants are facilitated, and the ecological environment is optimized.

Description

technical field [0001] The invention specifically relates to the field of preparing concrete through modification of silt. Background technique [0002] Silt is a honeycomb structure material formed by fine particles such as clay minerals deposited in still water or slow flowing water environment under the action of intergranular electrostatic force and molecular attraction, and formed by biochemical action. According to the classification of sources, sludge mainly includes natural river sludge and sludge produced by sewage treatment plants. Free mud has high natural water content, large void ratio, high compressibility, low shear strength, poor water permeability, thixotropy and flowing state, so it cannot be directly used in engineering. The composition of sludge is complex and has serious potential hazards to the environment, including: ① Salt pollution in sludge, high salt content will increase the electrical conductivity of the soil and destroy the balance of plant nut...

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Problems solved by technology

Free mud has high natural water content, large void ratio, high compressibility, low shear strength, poor water permeability, thixotropy and flowing state, so it cannot be directly used in engineering

The composition of sludge is complex and has serious potential hazards to the environment, including: ① Salt pollution in sludge, high salt content will increase the electrical conductivity of the soil and destroy the balance of plant nutrients; ② Pathogenic microorganisms, as many as a thousand pathogens can be detected in sludge And most of them are parasites that are more harmful; ⑤Nitrogen and phosphorus nutrient pollution, nitrogen and phosphorus and other nutrients cause eutrophication of water bodies; ④Organic pollutants, mainly benzene, phenols and other organic pollutants; ⑤Heavy metal pollution, the main source of heavy metal pollution It is mainly used in the sludge discharged by industry, as well as heavy metals such as copper and zinc in domestic pipelines. Heavy metals have low solubility and are relatively stable. They are easy to accumulate in the human body and animals, thereby endangering the health of humans and animals.

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