Ultrahigh-pressure long-distance pumping concrete and preparation method thereof

Abstract

The invention discloses ultrahigh-pressure long-distance pumping concrete and a preparation method thereof, and belongs to the technical field of concrete, wherein the ultrahigh-pressure long-distancepumping concrete comnprises the following composition in parts by weight: 1183-1214 parts of a coarse aggregate, 624-743 parts of a fine aggregate, 500-550 parts of cement, 216-280 parts of water, 50-80.8 parts of fly ash, 15-16.5 parts of a pumping agent, 20-30 parts of silicon carbide powder, 55-60 parts of an expanding agent and 11-13 parts of an efficient retarding and water reducing agent, wherein the pumping agent comprises 320-328 parts of a sulfonated melamine efficient water reducing agent and 2-3.5 parts of hydroxypropyl methylcellulose. According to the ultrahigh-pressure long-distance pumping concrete and the preparation method thereof provided by the invention, the problems that a conveying pipe is easily blocked and the concrete is easy to separate and seep and the engineering quality and progress are influenced due to the fact that concrete is subjected to large resistance of a pumping pipe are solved, and the ultrahigh-pressure long-distance pumping concrete has the advantages of reducing the resistance to the concrete during pumping and being beneficial to ultra-long-distance pumping.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to an ultrahigh-pressure long-distance pumping concrete and a preparation method thereof. Background technique [0002] In some occasions restricted by terrain and geographical environment factors, such as water diversion tunnels, often due to the long construction line, small section of the tunnel excavation, and steep mountains along the tunnel, the delivery pump cannot be transported into the tunnel at all, and the transfer and stacking of materials are also extremely difficult. , it is not convenient to mix and prepare concrete along the construction process, so the concrete needs to be mixed and then pumped to the construction site. [0003] The invention patent with the authorized notification number CN107572963B discloses a concrete and its preparation process, including the following components in parts by weight: 300-330 parts of cement; 490-590 parts of sa...

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Problems solved by technology

[0004] Because the invention uses a water reducing agent to increase the concrete strength, but does not add a retarder, it shortens the initial setting time of the concrete while increasing the strength, causing the concrete to start to set when it is transported for a long distance in the delivery pipe, so it is pumped The resistance of the pipe will gradually increase, which will easily cause the blockage of the conveying pipe and affect the quality and progress of the project

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