Method for preparing RPC (Reactive Powder Concrete) trench cover plate of high-speed railway passenger-dedicated line

A technology of passenger dedicated line and ditch cover, which is applied in the field of building materials, can solve the problems of difficult RPC forming and processing, large plastic shrinkage of concrete, and lower RPC quality, and achieve high performance and economic benefits, easy forming and processing, and high safety. Effect

Inactive Publication Date: 2011-09-07
WUHAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the low output and high price limit it to be widely used in concrete engineering.
In addition, its huge specific surface area (about 200,000 m 2 /Kg), in the process of mixing and forming, it needs a lot of water, which increase...

Method used

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  • Method for preparing RPC (Reactive Powder Concrete) trench cover plate of high-speed railway passenger-dedicated line
  • Method for preparing RPC (Reactive Powder Concrete) trench cover plate of high-speed railway passenger-dedicated line
  • Method for preparing RPC (Reactive Powder Concrete) trench cover plate of high-speed railway passenger-dedicated line

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Embodiment Construction

[0033] Such as figure 1 , figure 2 Shown, a kind of preparation method of high-speed rail passenger dedicated line RPC ditch cover plate, it comprises the steps:

[0034] 1), the whole mold: wipe the mold carefully with a rag, and then evenly apply a layer of organic wax, such as meguiars mirror giaze no 8 maximum mold release wax (Meguiars mirror giaze no 8 maximum mold release wax), and dry it with a dry silk cloth polishing;

[0035] 2) Preparation of the slurry: according to the parts by weight of each raw material: Portland cement: 100, silica fume: 10, quartz sand: 110, active mineral admixture (i.e. silica powder): 10, quartz powder : 35, water reducing agent: 2.5, water (pure water): 28 ~ 31, polypropylene fiber: 0.2, selection: Portland cement, silica fume, quartz sand, active mineral admixture, quartz powder, water reducing agent , water and polypropylene fiber, spare;

[0036] Put Portland cement, silica fume, quartz sand, active mineral admixture, quartz powde...

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Abstract

The invention relates to a method for preparing an RPC (Reactive Powder Concrete) trench cover plate of a high-speed railway passenger-dedicated line. The method is characterized by comprising the following steps of: (1) preparing a mould; (2) preparing slurry, wherein the slurry comprises the following raw materials in parts by weight: 100 parts of silicate cement, 10 parts of siliceous dust, 110 parts of quartz sands, 10 parts of active mineral admixture, 35 parts of quartz powder, 2.5 parts of water reducing agent, 28 to 31 parts of water, and 0.2 part of polypropylene fibers, the silicate cement, the siliceous dust, the quartz sands, the active mineral admixture, the quartz powder and the polypropylene are stirred in a stirrer, the water reducing agent is dissolved with water, and the water reducing agent is added into the stirrer and the residual water is stirred in the stirrer to obtain the slurry; (3) shaking and molding; (4) initially setting; (5) demolding; and (6) maintaining to obtain the RPC trench cover plate of the high-speed railway passenger-dedicated line. By the method, the mechanical performance of the RPC trench cover plate can be improved, the anti-cracking and seepage-proofing performance and duration performance of the RPC trench cover plate can be reinforced, the production cost of the RPC trench cover plate can be reduced, and the preparation process is simple.

Description

technical field [0001] The invention relates to a preparation method of an RPC trench cover plate for a high-speed railway passenger dedicated line, and belongs to the technical field of building materials. Background technique [0002] With the development needs of the modern construction industry and the rapid development of related fields of materials science, cement-based composite materials have been developed rapidly, especially in terms of strength, various high-strength and ultra-high-strength concretes continue to emerge. Mainly include: macro-defect free cement (referred to as MDF), superfine-grained dense cement (referred to as DSP), fiber reinforced cement or concrete (referred to as FRO), ultra-high-strength concrete (referred to as UHSC), ultra-high-strength reactive powder concrete (referred to as RPC) Wait. [0003] RPC is developed on the basis of maintaining the excellent performance of several other ultra-high-strength cement-based composite materials to ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 陈友治宋正林许闽李儒光曹晓梅陈有书夏炎金
Owner WUHAN UNIV OF TECH
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