Formula and production process for subway segment concrete

Abstract

The invention discloses a formula and a production process for subway segment concrete, and relates to the field of building materials. The formula for the subway segment concrete specifically comprises the following components of, in parts by weight, 155 parts of water, 382 parts of concrete, 68 parts of fly ash, 645 parts of yellow sand, 1196 parts of bluestone, and 4.2 parts of a water reducingagent, wherein the concrete is P042.5 specification concrete, the fly ash is grade II fly ash, the bluestone is composed of bluestone I and bluestone II, the ratio of bluestone I to bluestone II is 3to 7, and a Sika water reducing agent is adopted as the water reducing agent. Compared with the prior art, the formula and the production process for the subway segment concrete have the beneficial effects that the problem of many form-releasing air holes is solved by replacing the water reducing agent and taking auxiliary vibration measures, the problem of duct piece mucous membrane is solved byreplacing the water reducing agent and a release agent, and the problem of difficulty in form release, hoisting and moving is solved through the measure of additionally arranging an air pipe.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a formula and production process for subway segment concrete. Background technique [0002] The subway construction segment is usually a shield segment, and its main function is to resist special loads such as soil pressure. [0003] The shield segment is the innermost barrier of the tunnel and the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel. [0004] The production of shield segments usually uses high-strength impermeable concrete to ensure reliable load-bearing and waterproof performance. The production mainly uses the finished segment mold to form after sealing and pouring concrete. [0005] When the existing subway segment concrete is produced, there are often problems such as many demoulding pores an...

AI Technical Summary

Problems solved by technology

[0005] During the production of the existing subway segment concrete, there are often problems such as many air holes in the demoulding and the formation of the pipe mucous membrane, which reduces the production quality of the subway segment

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