Synchronous grouting concrete and preparation method of synchronous grouting concrete

Abstract

The embodiment of the invention provides synchronous grouting concrete, which is prepared from the following raw materials in parts by mass: 182 to 200 parts of Portland cement, 705 to 772.5 parts ofmachine-made sand, 705 to 772.5 parts of natural sand, 45.6 to 50 parts of bentonite, 3.65 to 4.93 parts of retarders, 0 to 4.93 parts of water reducing agents and 275 to 392.3 parts of drinking water. A proper amount of machine-made sand and natural sand are added into the synchronous grouting concrete, so that the early stage intensity of a product is favorably improved; the product performanceis improved; gaps inside the concrete can be well filled; the compactness of the synchronous grouting concrete is improved; meanwhile, a proper amount of Portland cement is added into the synchronousgrouting concrete; high pressure-resistant intensity, anti-seeping performance and anti-corrosion performance are realized; the ground surface settlement and pipe duct floatation can be effectively controlled. In addition, the synchronous grouting concrete provided by the invention has the advantages that the raw materials can be locally taken and easily obtained; the material cost is reduced; thepreparation method is simple.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a synchronous grouting concrete and a preparation method of the synchronous grouting concrete. Background technique [0002] The shield synchronous grouting technology refers to that in the process of shield tunneling construction, after the tunnel lining segments are assembled and the shield tail comes out, under a certain grouting pressure, an appropriate amount of grouting material with a certain early strength and final strength is injected. The slurry material is filled into the gap behind the tail of the shield, and after it is consolidated and hardened, it can fill the building gap behind the wall and provide a certain bearing capacity to stabilize the segment lining. Synchronous grouting is very important for controlling ground displacement, reducing disturbance to surrounding underground structures and maintaining the stability of shield tunneling. [0003] I...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of poor impermeability, low early strength, low compressive strength and poor corrosion resistance of synchronous grouting slurry in the prior art, the present invention provides a synchronous grouting concrete which has relatively High early strength, compressive strength, impermeability and corrosion resistance, and simple preparation, low preparation cost

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