Novel fine-grained concrete based on green geopolymer and dredged sand and preparation method of novel fine-grained concrete

Abstract

The invention discloses novel fine-grained concrete based on a green geopolymer and dredged sand. The novel fine-grained concrete is prepared from the following main raw materials: fly ash, metakaolin, water glass, sodium hydroxide, dredged sand, waste ceramic powder, polypropylene fibers, a superplasticizer and water. The invention further discloses a preparation method of the fine-grained concrete, which comprises the following steps: S01, adding metakaolin and fly ash into a stirrer, stirring the raw materials for 1 minute and adding an alkali activator solution; S02, adding dredged sand, waste ceramic powder and polypropylene fibers, then adding a polycarboxylate superplasticizer and water; S03, adding the uniformly mixed materials into a test mold layer by layer and step by step; andS04, covering the surface of the test mold with a film after molding, and maintaining the test piece to a specified age under standard conditions after demolding. According to the novel fine-grained concrete based on the green geopolymer and the dredged sand and the preparation method of the novel fine-grained concrete, industrial waste residues such as waste dredged sand and fly ash can be utilized, and the novel fine-grained concrete with excellent performance is prepared.

Description

technical field [0001] The invention relates to a novel fine-grained concrete based on green geopolymer and dredging sand and a preparation method thereof, and belongs to the technical field of waste utilization and new energy. Background technique [0002] With the advancement of sustainable social development, environmental awareness is gradually gaining popularity among the people, but at the same time energy consumption is also increasing, and the output of fly ash, a by-product of the energy industry, is also increasing day by day, increasing the reuse rate of solid waste fly ash resources is becoming more and more important. be valued. Moreover, the production of ordinary Portland cement gel materials not only consumes a large amount of non-renewable resources, but also emits CO 2 A large amount and cause other dust pollution, and the intensity is low. The geopolymer gel material is a new type of green gel material with a three-dimensional network structure formed by...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of fine-grained concrete based on green geopolymers and dredging sand and its preparation method to solve the problem of using ordinary Portland cement and river sand for traditional concrete, which not only consumes a large amount of non-renewable resources, Emission of CO 2 A large amount and other defects of dust pollution, and make full use of industrial waste such as waste dredging sand and fly ash to prepare new fine-grained concrete with excellent performance to replace ordinary concrete