RPC cover plate for subway evacuation platform and preparation method of RPC cover plate

An evacuation platform and cover plate technology, applied in the field of concrete, can solve the problems of poor toughness, high consumption of RPC cementitious materials, inconsistent hydration process of cementitious materials, etc., to improve toughness and volume stability, and inhibit the generation of microscopic cracks , the effect of inhibiting the expansion of macroscopic crack powder

Pending Publication Date: 2021-07-02
陕西黄峪工程材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The matrix is ​​highly brittle and easily cracked and damaged after being impacted and collided;
[0005] 2) The amount of fiber is high, and steel fiber is mainly used. Steel fiber is easy to rust, which affects appearance and performance;
[0006] 3) Dark color, poor appearance quality
[0007] The amount of RPC cementitious material is high, there are many components, and the water-binder ratio is low, resulting in a darker color; the hydration process of various cementitiou

Method used

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  • RPC cover plate for subway evacuation platform and preparation method of RPC cover plate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1

[0050] The raw material for the RPC cover plate 1 for the subway evacuation platform includes 700 cements, 300 parts of ultra-fine mine powder, 200 parts of silica gray, 800 quartz sand, 100 parts of the modified silica, polyhantice fiber 10 copies of glass fibers, 0.5 parts of polyacrylonitrile fibers, 20 parts of polycarboxylic acid water reducer, 1 brightener and 200 water.

[0051] Where the above cement is low. 3 A 52.5 ordinary silicate cement; the specific surface area of ​​the silicone ash used is 20000mmm 2 / kg, SIO 2 The content is 95%; the ultrafine mine powder used is S95,

[0052] Among the above quartz sand, the silica content is ≥96%; and the quartz sand consists of three grades, respectively: 0.1mm ≤ particle diameter <0.2mm, 0.2mm ≤ particle size <0.5 mm and 0.5mm ≤ particle size ≤ 1.65mm; their weight ratio is 3: 5: 2.

[0053] The diameter of the polyoxaldehyde fibers is 0.2 mm, the length is 12 mm, the elastic modulus 600GPa; the shape is a ...

Example Embodiment

[0072] Example 2

[0073] The preparation method of this example is substantially the same as that of Example 1, and the raw material for the RPC cover plate 2 for the subway evacuation platform is:

[0074] The raw materials for the RPC cover 2 for the subway evacuation platform include 750 cements, 100 parts of ultra-fine mine powder, 200 parts of silica gray, 300 parts of quartz sand, 1,300 copies of silica grain powder, 300 copies of silica grain powder 20 copies of glass fibers, 1 polyacrylonitrile fiber, 25 parts of a polycarboxylate water reducer, 1.5 parts of the brightener and 210 water.

[0075] Among them, the modified silica gray powder was prepared by the following method.

[0076] a. Stir the silica grayite powder at a constant temperature of 60 ° C for 10 min;

[0077] b. The silane coupling agent is then mixed with ethanol to obtain a mixed liquid; wherein the silane coupling agent is used as 2.0% (wt.), the silane coupling agent and diluent mass ratio 1: 5 ;

[00...

Example Embodiment

[0082] Example 3

[0083] The preparation method of this example is substantially the same as that of Example 1, and the raw material for the RPC cover 3 for the subway evacuation platform is:

[0084] The raw material for the RPC cover plate 3 for the subway evacuation platform includes 600 parts of cement, 100 parts of microbeads, 100 parts of the kaoli, 200 serviles, 900 quartz sand, 200, modified silica gray powder 150 25 parts of polyolside, 45 parts of glass fiber, 1.5 parts of polyacrylonitrile fiber, 30 parts of polycarboxylic acid water reducer, 2 parts of brightener and 190 water.

[0085] Among them, the modified silica gray powder was prepared by the following method.

[0086] a. Stir the silica grayite powder at a constant temperature of 60 ° C for 10 min;

[0087] b. The silane coupling agent is then mixed with ethanol to obtain a mixed liquid; wherein the silane coupling agent is 0.5% (wt.), the silane coupling agent and diluent mass ratio 1: 1 ;

[0088] c. Under c...

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Abstract

The invention discloses an RPC cover plate for a subway evacuation platform and a preparation method of the RPC cover plate. The RPC cover plate comprises the raw materials in parts by weight: 500 to 1000 parts of cement, 250 to 600 parts of mineral admixture, 700 to 1200 parts of quartz sand, 50 to 400 parts of modified wollastonite powder, 10 to 30 parts of polyformaldehyde fibers, 10 to 50 parts of glass fibers, 0.2 to 2 parts of organic fibers, 10 to 40 parts of a polycarboxylic acid type water reducing agent, 0.2 to 2 parts of a brightening agent and 150 to 250 parts of water. Through the synergistic toughening effect of the wollastonite and the multi-scale hybrid fibers of the steel fibers, the expansion of ultra-high-performance macroscopic crack powder and the generation of micro cracks can be inhibited, and the toughness and the volume stability of the concrete are greatly improved. Meanwhile, the wollastonite powder is high in color whiteness, and the color and appearance of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to an RPC cover plate used for a subway evacuation platform and a preparation method thereof. Background technique [0002] Reactive powder concrete (RPC) is the most innovative cement composite matrix material developed in the past 20 years. Its design and preparation are mainly based on the theory of the closest packing of particles, by reducing porosity, improving microstructure, increasing homogeneity, and improving toughness. Compared with ordinary cement-based materials, RPC has ultra-high strength, high toughness and excellent durability, which can well meet the needs of civil engineering for lightweight, high-rise, long-span and high durability. Structures, thin-walled structures, architectural decoration, marine engineering, restoration and reinforcement engineering and other fields have broad and extensive application prospects. [0003] The subway RPC evacuation platfo...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/04C04B24/22B28B1/087B28B11/24B28B13/02B28C5/00C04B111/34
CPCC04B28/04C04B40/0039C04B14/043B28B13/02B28B1/087B28B11/245B28C5/003C04B2201/50C04B2111/343
Inventor 姜斌黄正强全国兴潘兴良王立周俊刘涛张斌张鑫
Owner 陕西黄峪工程材料有限公司
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