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Cement color brick produced by shield tunnel spoil and preparation method thereof

A technology of shield tunneling and cement, which is applied in the field of building materials, can solve the problems of people's life safety and property safety hazards, environmental pollution, etc., and achieve the effects of good frost resistance, excellent corrosion resistance, and good wear resistance

Active Publication Date: 2020-12-18
CHINA RAILWAY TUNNEL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foreign transportation and stacking of waste slag will cause huge environmental pollution to the city
In recent years, landslides and landslides caused by improper stacking of construction waste are not uncommon, which brings huge hidden dangers to people's life safety and property safety.

Method used

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  • Cement color brick produced by shield tunnel spoil and preparation method thereof
  • Cement color brick produced by shield tunnel spoil and preparation method thereof

Examples

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preparation example Construction

[0027]In this embodiment, the method for preparing the modified loofah fiber includes the following steps:

[0028](1) Preparation of a solution for modification, including preparation of alkaline mixed solution A and acidic mixed solution B, where:

[0029]The preparation method of the alkaline mixed solution A is: taking 16.7 parts of NaOH and 1.3 parts of urea by weight, placing them in 82 parts of deionized water, and stirring and dissolving;

[0030]The preparation method of the acidic mixed solution B is: take 25 parts by weight of H2SO4, 60 parts Na2SO4And 55 parts of ZnSO4Put it in 860 parts of deionized water and stir to dissolve;

[0031](2) Preparation of modified loofah fiber: After cutting the loofah into small pieces, tear the loofah into a single piece of loofah silk, then put the loofah silk in the alkaline mixed solution A, heat up to 100 ℃, boil for 25 minutes, then take out the loofah silk Place it in acidic mixed solution B, soak for 10 minutes, then filter and collect the s...

Embodiment 1

[0041]The raw material of the cement color brick of this embodiment includes the following components by weight: 15 parts of cement, 55 parts of aggregate, 10 parts of fly ash, 0.5 part of hydroxypropyl methylcellulose, palygorskite powder (600-800 mesh) 7 parts, 7 parts of seaweed powder (600~800 mesh), 1 part of modified loofah fiber, 0.5 part of ramie fiber (monofilament length of 9-12mm), 1 part of bamboo charcoal fiber (monofilament length of 9-12mm), cement 0.5 parts of brightener, 1 part of iron oxide pigment, 20 parts of water; the aggregate is machine-made sand formed by the crushing of waste slag of shield tunnel, the fineness modulus of the machine-made sand is 2.6, MB is 1.4, and the content of stone powder is 12%.

[0042]In this embodiment, the method for preparing cement colored bricks includes the following steps:

[0043]a. Mix fly ash, palygorskite powder and seaweed powder in parts by weight, send them to a ball mill and grind them into 1000-1200 mesh particles, then mi...

Embodiment 2

[0053]The raw materials of the cement color brick of this embodiment include the following components by weight: 10 parts of cement, 65 parts of aggregate, 15 parts of fly ash, 0.3 part of hydroxypropyl methylcellulose, palygorskite powder (600-800 mesh) 10 parts, 10 parts of seaweed powder (600~800 mesh), 0.5 parts of modified loofah fiber, 1 part of ramie fiber (monofilament length 9-12mm), 0.5 part of bamboo charcoal fiber (monofilament length 9-12mm), cement 0.2 parts of brightener, 0.5 parts of iron oxide pigment, 17 parts of water; the aggregate is machine-made sand formed by crushing the waste slag of the shield tunnel, the fineness modulus of the machine-made sand is 3.1, the MB is 1.0, and the stone powder content is 10%.

[0054]In this embodiment, the method for preparing cement colored bricks includes the following steps:

[0055]a. Mix fly ash, palygorskite powder and seaweed powder in parts by weight, send them to a ball mill and grind them into 1000-1200 mesh particles, the...

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Abstract

The invention provides cement colorful bricks produced by using shield tunnel waste slag. The cement colorful bricks produced by using shield tunnel waste slag comprise the following components in parts by weight: 10-15 parts of cement, 55-65 parts of aggregate, 10-15 parts of fly ash, 0.3-0.5 parts of hydroxypropyl methyl cellulose, 7-10 parts of palygorskite powder, 7-10 parts of seaweed meal, 0.5-1 part of modified towel gourd fiber, 0.5-1 part of ramie fiber, 0.5-1 part of bamboo charcoal fiber, 0.2-0.5 parts of a cement brightener, 0.5-1 part of iron oxide pigment, and 15-20 parts of water. The aggregate is machine-made sand formed by crushing the shield tunnel waste slag, the fineness modulus of the machine-made sand is 2.6-3.7, MB is not greater than 1.4, and the stone flour contentis no greater than 12%; the components are mutually cooperated and realizes mutual synergism, the produced cement colorful bricks have the advantages of good toughness, good wear resistance, good compressive strength, good antifreezing performance, excellent cracking resistance, and excellent corrosion resistance, and have certain heat retention and adsorption air permeability. The provided process and technological parameter are reasonable.

Description

Technical field[0001]The invention relates to the field of building materials, in particular to a cement color brick produced by using shield tunnel waste slag and a preparation method thereof.Background technique[0002]Shield tunnel construction is becoming more and more common in the construction of urban subways and high-speed railways. The large amount of waste slag generated by shield tunnels has a huge impact on urban environmental pollution. Improper stacking may even cause major hazards such as landslides and collapse. Both outbound transportation and storage yard require huge expenses.[0003]In the past ten years, the country has vigorously promoted the construction of transportation infrastructure, and the application of shield tunnel construction technology has become more and more extensive, and the waste slag produced by shield tunnels has basically been treated as construction waste, with a shield with a cross-sectional diameter of 10 meters. As an example, 78,500 cubic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/16C04B20/02C04B18/24C04B14/38
CPCY02W30/91
Inventor 罗斌陈慧超吴军王鹏飞
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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