Regeneration method of waste concrete and modified recycled concrete

Abstract

The invention relates to the field of concrete, and particularly discloses a regeneration method of waste concrete and modified recycled concrete. The waste concrete regeneration method comprises: S1, crushing waste concrete blocks, soaking in a hydrochloric acid solution, stirring the mixture, taking out the concrete blocks, and washing the mixture to obtain crushed aggregates; s2, soaking and stirring the crushed aggregates in a sodium carbonate solution, then taking out the crushed aggregates, and washing the crushed aggregates with water to obtain loaded aggregates; s3, soaking and stirring the loaded aggregate in a water-based acrylic resin solution, and then taking out the loaded aggregate to prepare a modified aggregate; s4, spray-coating composite fibers on the surface of the modified aggregate, wherein the weight ratio of the modified aggregate to the composite fibers is 1:(0.01-0.025), and performing stirring, drying, grading and drying to obtain the regenerated aggregate. The modified recycled concrete is prepared from recycled aggregate prepared by a waste concrete regeneration method. The recycled concrete has the advantage of good mechanical strength.

Description

technical field [0001] The application relates to the field of concrete, more specifically, it relates to a recycling method of waste concrete and modified recycled concrete. Background technique [0002] With the gradual development of urbanization in our country, the generation of construction waste is also increasing year by year, and the treatment of construction waste has gradually received attention, and with the rapid development of the construction industry, the lack of resources makes the reuse of construction waste gradually become a research hotspot. [0003] Recycled concrete is a new concrete made by crushing, cleaning and grading discarded concrete blocks, mixing them with grading according to a certain proportion, replacing part or all of natural aggregates such as sand and gravel, and then mixing them with cement and water. Recycling of construction waste; however, during the crushing process of discarded concrete blocks, due to the large mechanical force, i...

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Problems solved by technology

[0003] Recycled concrete is a new concrete made by crushing, cleaning and grading discarded concrete blocks, mixing them with grading according to a certain proportion, replacing part or all of natural aggregates such as sand and gravel, and then mixing them with cement and water. Recycling of construction waste; however, during the crushing process of discarded concrete blocks, due to the large mechanical force, it is easy to cause a large number of fine cracks on the surface of the recycled aggregate, which makes the water absorption of the recycled aggregate higher, so it is easy to The strength of the formed concrete becomes lower, the shrinkage is large, and the cracking is serious

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