A kind of high-strength recycled concrete and its preparation method

Abstract

The application relates to the field of concrete production, and specifically discloses a high-strength recycled concrete and a preparation method thereof. High-strength recycled concrete includes recycled coarse aggregate, recycled fine aggregate, stone, mineral powder, cement, water, fly ash, sand, terpene phenol resin, aluminum sulfate, and silica fume; its preparation method is: firstly, aluminum sulfate Mix and stir with silica fume to obtain the first mixture, then mix and stir the regenerated coarse aggregate and regenerated fine aggregate and then add to the first mixture to obtain the second mixture, then add the preheated terpene phenol resin to the second Stir the mixture to obtain the third mixture, and finally add the remaining raw material components to the third mixture and mix evenly to obtain high-strength recycled concrete. This application can improve the mechanical strength of recycled concrete and expand the use of recycled concrete Effect.

Description

technical field [0001] This application relates to the field of concrete production, more specifically, it relates to a high-strength recycled concrete and its preparation method. Background technique [0002] Recycled concrete refers to waste concrete blocks that go through a series of processing steps, and then mix them with gradation in a certain proportion, partially or completely replace natural aggregates such as sand and gravel, and finally add cement, water and other materials to prepare new materials. concrete. [0003] At present, the construction waste formed by the concrete of abandoned buildings is recycled to form recycled concrete after crushing, which not only handles a large amount of construction waste, but also saves construction materials. When the existing recycled concrete is processed, it is generally necessary to successively crush, clean and classify the discarded concrete blocks. However, during the crushing process of the discarded concrete blocks...

AI Technical Summary

Problems solved by technology

When the existing recycled concrete is processed, it is generally necessary to successively crush, clean and classify the discarded concrete blocks. However, during the crushing process of the discarded concrete blocks, tiny cracks are easily generated inside the aggregate, and at the same time, the Part of the old mortar will stick to the surface, resulting in the strength and durability of recycled concrete itself being lower than that of natural concrete. Therefore, most of the current recycled concrete is used in non-structural and non-load-bearing concrete fields such as backfill and roadbed, which affects the scope of use of recycled concrete.

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