Fine-grained concrete taking dredged sand as main raw material and preparation method thereof

Abstract

The invention discloses fine-grained concrete taking dredged sand as a main raw material. The fine-grained concrete is prepared from cement, dredged sand, limestone powder, regenerated glass powder, ahigh-efficiency water reducing agent and water. The invention further discloses a preparation method of the fine-grained concrete with the dredged sand as the main raw material. The preparation method comprises the following steps: S01, weighing the dredged sand, the cement, the limestone powder and the recycled glass powder according to the raw material proportion, adding into a stirring machineand carrying out dry mixing for 1-2 min till even mixing is achieved, S02, adding a polycarboxylate superplasticizer and water by a later mixing method, and performing wet mixing until the mixture isuniformly mixed, S03, adding the uniformly mixed materials into a test mold layer by layer and step by step, firstly adding 1/2 of the materials into the test mold, vibrating on a vibrating table for30 seconds, and then vibrating while adding the materials, and S04, covering the surface of the test mold with a thin film after molding, demolding after 12-24 hours, and curing the test piece to a specified age under standard conditions after demolding to obtain the dredged sand fine-grained concrete. The invention provides fine-grained concrete taking dredged sand as a main raw material and thepreparation method of the fine-grained concrete. The dredged sand can be reasonably utilized to be processed into a building material.

Description

technical field [0001] The invention relates to a fine-grained concrete with dredged sand as the main raw material and a preparation method thereof, belonging to the technical field of waste utilization and new materials. Background technique [0002] In recent years, the regulation of the Yangtze River has brought a large amount of dredged waste sand. If it is only disposed of as waste, it will not only occupy a large amount of land, but also cause secondary pollution of the surrounding environment and water resources, resulting in a huge waste of resources. Reasonable disposal and utilization of waste dredged soil can not only reduce the impact on the environment, but also increase a large amount of land resources. It is the basic national policy of water transportation industry to persist in saving resources and protecting the environment, and to adhere to the road of green, low-carbon, circular and sustainable development. way. If the waterway project spoil resources ar...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the regulation of the Yangtze River has brought a large amount of dredged waste sand. If it is only treated as waste for disposal, it will not only occupy a large amount of land, but also cause secondary pollution of the surrounding environment and water resources, resulting in a huge waste of resources.