Concrete pipeline mud-jacking agent and preparation method

Abstract

The invention belongs to the field of building materials, and particularly relates to a concrete pipeline mud-jacking agent and a preparation method thereof. The invention adopts the technical scheme that the concrete pipeline mud-jacking agent comprises the following components in percentage by weight: 0.5 to 2 percent of efficient water reducing agent, 0.1 to 0.5 percent of stabilizer, 1 to 5 percent of early expansion agent, 35 to 55 percent of medium and later expansion agent, 0.1 to 1 percent of retarder, 0.2 to 1 percent of rust inhibitor, 0.05 to 0.1 percent of air entraining agent and 50 to 60 percent of mineral admixture. The concrete pipeline mud-jacking agent has the advantages of wide raw material source, good mobility, high strength, no bleeding or layering, good durability, ageing resistance, low chlorine ion content, no corrosion to steel bars, firmness, high filling property, one-time mud-jacking construction, capability of making slurry in a pipeline compact and pore-free, no shrinkage, no rust corrosion of prestressed steel bars, and firm adhesion with concrete.

Description

Technical field [0001] The invention is the field of building materials, which involves a concrete pipeline scholarship and preparation method. Background technique [0002] With the rapid development of China's economy, China's railway construction, especially passenger transport line construction, has entered a period of rapid development. At present, China ’s construction and upcoming passenger dedicated lines are huge. Among them, the proportion of bridges is nearly 50%.The quality of the passenger dedicated line project is directly related to the safety of the people's life and property. In the construction of the passenger line bridge, the structural engineering and other structural engineering must be used for 100 years.The "TB / T 3192-2008 Railway Method Symphony Swipe Technical Conditions" was implemented, and the performance indicators of the tunnel grouting materials that must be used in the bridge must be used in passenger transportation lines were clearly stipulated. ...

AI Technical Summary

Problems solved by technology

[0003] Pipeline grouting agent is a key material to ensure that steel bars do not rust and effectively transmit stress between them and concrete components. In many bridges in my country, due to grouting quality problems, the steel strands in the pipe are severely corroded and the prestress loss is large, resulting in safety. Hidden dangers, even a few bridges collapsed, and the steel wires of a cable-stayed bridge in Guangdong, my country were severely corroded, so that all of them needed to be replaced

At present, the admixtures in the existing pipeline grouting agent are mainly ordinary slag powder, fly ash, gypsum powder, silica fume, calcite, feldspar, coal gangue, etc., which are mainly used for filling and have a great impact on improving the grouting agent. Little or no effect on strength

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