Set-retarding type long-distance pumping type concrete prepared by waste slag of subway project and application

Abstract

The invention provides a set-retarding type long-distance pumping type concrete prepared by waste slag of subway projects and application, and belongs to the field of concrete. The prepared concrete has the advantages that the density and fluidity are good, the extension and strength are high, the production cost is low, and the concrete is suitable for long-distance pumping. The set-retarding type long-distance pumping type concrete prepared by the waste slag of the subway projects comprises the following components in parts by weight: 260 to 300 parts of cement, 151 parts of water, 990 to 1010 parts of stone, 700 to 720 parts of stone chips, 50 to 80 parts of stone powder, 80 to 105 parts of ore powder, 85 to 100 parts of fly ash, 4.9 to 4.95 parts of set-retarding type polycarboxylate superplasticizer, 0.049 to 0.0495 part of starch ether, and 0.098 to 0.099 part of building glue 1093.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a slow-setting long-distance pumping concrete prepared by using waste slag from subway engineering and its application. Background technique [0002] Ready-mixed concrete is one of the main engineering raw materials in today's building construction. Ready-mixed concrete has the characteristics of abundant raw materials, low price, simple production process, and convenient construction, so its usage is increasing. At the same time, ready-mixed concrete has the characteristics of high compressive strength, stable quality, good durability, convenient construction, environmental protection and sanitation. Ordinary on-site mixed concrete is mixed with cement, river sand, and clear water. After metered mixing and hardening, it plays the role of bonding building materials together to form a solid whole. It does not have the advantages of ready-mixed concrete. [0003] Polycarboxylate-based hig...

AI Technical Summary

Problems solved by technology

[0004] In recent years, due to the continuous and rapid development of the subway infrastructure, the performance requirements for the prepared concrete are getting higher and higher. When the subway distance is greater than 250 meters, the ordinary concrete is prone to collapse too quickly under the pump pressure and cannot be pumped. , is easy to block the pipe, has no fluidity after pumping, and requires construction site workers to add water, etc., resulting in a failure to guarantee the strength

In addition, there are more and more muck from subway construction, and the performance requirements for the prepared concrete are getting higher and higher, and the disposal of muck is time-consuming and laborious

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