Shield tunneling machine synchronous grouting material containing recycled fine construction waste powder and preparation method thereof

Abstract

The invention discloses a shield tunneling machine synchronous grouting material containing recycled fine construction waste powder, which is prepared from the following components: 80kg / m<3> to 140kg / m<3> of cementing material, 250kg / m<3> to 380kg / m<3> of fine construction waste powder, 10kg / m<3> to 50kg / m<3> of bentonite, 710kg / m<3> to 940kg / m<3> of sand, 0.8kg / m<3> to 1.4kg / m<3> of polycarboxylate superplasticizer, 0.01kg / m<3> to 1.0kg / m<3> of cellulose ether and 300kg / m<3> to 550kg / m<3> of water. The sand which is 2.5mm or above in grain size is screened for later use; the cementing material, the fine construction waste powder, the bentonite, the cellulose ether and the sand are weighed according to the proportion and uniformly dry-mixed; the polycarboxylate superplasticizer is weighed, added into the water and uniformly mixed; aqueous solution is added into the powder and uniformly mixed, and thereby the shield tunneling machine synchronous grouting material containing recycled fine construction waste powder is obtained. By replacing fly ash and part of bentonite with the fine construction waste powder, the invention not only can solve the problem on how to treat dust in the process of recycling construction waste, but also can solve the problems of poor fly ash quality or resource scarcity, moreover, the quality of the grouting material can be ensured, the cost is low, and the grouting material is environmentally friendly.

Description

1. Technical field: [0001] The invention relates to a shield machine synchronous grouting material containing recovered fine powder of construction waste and a preparation method thereof, belonging to the technical field of construction waste resource treatment and utilization. 2. Background technology: [0002] With the acceleration of urbanization, the demolition and renovation of the original old residences have produced a large amount of construction waste, such as: waste concrete slag powder, gravel, waste wood, etc., among which concrete, bricks, external wall insulation waste Foam boards account for about 40%-60% of construction waste. The current treatment methods generally use open-air stacking or landfilling. These two methods not only waste resources and destroy the ecological environment, but also occupy land resources that people rely on for survival. Waste resource treatment and utilization has become a major issue in society. [0003] At present, the recyclin...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to overcome the problem that the recovered fine powder in the construction waste cannot be used and processed in the prior art, and to provide a shield machine synchronous grouting material containing the recovered fine powder of the construction waste and its preparation method, The fine powder recovered from construction waste is used in the production and preparation of synchronous grouting for shield tunneling to replace fly ash and bentonite in synchronous grouting for shield tunneling, which can improve the stability and fluidity of synchronous grouting and reduce costs. protect environment