Post-tensioned prestressed concrete beam duct grouting material of highway bridge and preparation method thereof

Abstract

Provided is a post-tensioned prestressed concrete beam duct grouting material of a highway bridge. Raw materials include a cementing material, a mineral and active admixture, a super dispersing agent, a composite expanding agent, a water retaining agent, a stabilizing agent, a lubricating agent, a toughening agent, a cementing adjusting agent and a steel bar rust resisting agent and are mechanically mixed through a double-shaft paddle type gravity-free efficient mortar mixer. Firstly, the mineral and active admixture and 1 / 2 of the cementing material are added into the mixer to be premixed for 1 min-2 min; then, the super dispersing agent, the composite expanding agent, an antifoaming agent, the stabilizing agent, the toughening agent, the cementing adjusting agent and the steel bar rust resisting agent are added into the mixer to be premixed for 1 min-2 min, wherein if the agents are aqueous solutions, the agents can be diluted and mixed with part of the inert mineral admixture in advance; finally, the rest of the cementing material is added into the mixer, all the materials are stirred for 5 min-8 min, and then discharging and packaging can be carried out. The post-tensioned prestressed concrete beam duct grouting material solves the problem that a grouting material prepared through a grouting agent and cement on the site maybe can not meet standards.

Description

【Technical field】 [0001] The invention relates to the field of cement-based materials, in particular to a post-tensioned prestressed concrete beam channel pressure slurry for highway bridges and culverts and a preparation method thereof. The channel pressure slurry is mainly used for channel pressure of post-tensioned prestressed concrete beams pulp. . 【Background technique】 [0002] With the sustained, rapid, healthy and stable development of the national economy, infrastructure construction has entered a period of rapid development. The "National Highway Network Planning (2013-2030)" has been approved by the State Council. The total size of the national highway network is about 400,000 All county-level and above administrative regions across the country will be covered by ordinary national highways, and national expressways will connect all prefecture-level administrative centers and medium-sized and above cities with an urban population of more than 200,000. As well as ...

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Problems solved by technology

[0004] In order to solve the problem that grouting agent and cement on-site configuration of grouting materials may not meet the standard requirements, and the various advantages of using grouting materials

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