Preparation method of structural concrete capable of preventing erosion by sulfate mediums

A medium erosion, sulfate-resistant technology, applied in clay preparation devices, chemical instruments and methods, manufacturing tools, etc., can solve the problems of poor surface modification effect, high production cost, complex process, etc., to shorten the treatment time, The effect of low cost and simple operation process

Active Publication Date: 2016-07-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is worth noting that these methods for modifying waste rubber tire powder are either complicated in process, high in production cost, or poor in surface modification effect, which restricts the application of these modification methods in actual engineering.

Method used

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  • Preparation method of structural concrete capable of preventing erosion by sulfate mediums
  • Preparation method of structural concrete capable of preventing erosion by sulfate mediums
  • Preparation method of structural concrete capable of preventing erosion by sulfate mediums

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of structural concrete resistant to sulfate medium erosion, comprising the steps of:

[0031] (1) Wash and dry the waste rubber tires and crush them into granules, pass through a 5mm square hole sieve to remove impurities and irregular particles, put the treated waste rubber tire granules into a 10L ball mill, and mill them at 40r / min for 20min to obtain waste Rubber tire powder, sealed and placed for 48 hours for use, the average particle size of waste rubber tire powder measured by a laser particle size analyzer is 12.756um.

[0032] (2) Put 44g of sodium dichromate, 880g of concentrated sulfuric acid, and 71g of distilled water into the reactor, start the agitator, stir at 30r / min to form a uniform treatment solution, and control the pH value of the treatment solution below 1. At room temperature, soak 500g of waste rubber tire powder in the treatment solution, and stir at 60r / min for 2h to fully mix the waste rubber tire powder and treatment sol...

Embodiment 2

[0036] A preparation method of structural concrete resistant to sulfate medium erosion, comprising the steps of:

[0037] (1) Wash and dry the waste rubber tires and crush them into granules, pass through a 5mm square hole sieve to remove impurities and irregular particles, put the treated waste rubber tire granules into a 10L ball mill, and mill them at 40r / min for 10min to obtain waste Rubber tire powder, sealed and placed for 48 hours for use, the average particle size of waste rubber tire powder measured by a laser particle size analyzer is 13.085um.

[0038] (2) Put 35g of sodium dichromate, 700g of concentrated sulfuric acid, and 63g of distilled water into the reactor, start the agitator, stir at 30r / min to form a uniform treatment solution, and control the pH value of the treatment solution below 1. At room temperature, soak 400g of waste rubber tire powder in the treatment solution, and stir at 60r / min for 2h to fully mix the waste rubber tire powder and treatment sol...

Embodiment 3

[0042] A preparation method of structural concrete resistant to sulfate medium erosion, comprising the steps of:

[0043] (1) Wash and dry the waste rubber tires and crush them into granules, pass through a 5mm square hole sieve to remove impurities and irregular particles, put the treated waste rubber tire granules into a 10L ball mill, and grind them at 40r / min for 8min to obtain waste Rubber tire powder, sealed and placed for 48 hours for use, the average particle size of waste rubber tire powder measured by a laser particle size analyzer is 13.275um.

[0044] (2) Put 45g of sodium dichromate, 900g of concentrated sulfuric acid, and 67.5g of distilled water into the reactor, start the agitator, stir at 30r / min to form a uniform treatment solution, and control the pH value of the treatment solution below 1. At room temperature, soak 500g of waste rubber tire powder in the treatment solution, and stir at 60r / min for 1h to fully mix the waste rubber tire powder and treatment s...

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Abstract

The invention discloses a preparation method of structural concrete capable of preventing erosion by sulfate mediums. The preparation method mainly comprises the following steps: crushing abandoned rubber tires into granules, screening the granules, and then grinding the screened granules so as to obtain abandoned rubber tire powder; performing surface chemical oxidation modification on the abandoned rubber tire powder with treatment fluid prepared from sodium bichromate, concentrated sulfuric acid and distilled water; stirring the abandoned rubber tire powder after the surface chemical oxidation modification, with cement, mineral admixture, broken stones, sand and water so as to obtain concrete mixed with abandoned rubber tire powder of surface chemical oxidation modification; finally performing conventional maintenance and CO2 gas maintenance. According to the preparation method, the technology is simple, the cost is reduced, through addition of the modified abandoned rubber tire powder and the CO2 gas maintenance, the capacity of the structural concrete resisting to the erosion of the sulfate mediums is improved, and the structural concrete has excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of preparation of marine structure materials, and in particular relates to a preparation method of structural concrete resistant to corrosion by sulfate medium. Background technique [0002] Since the advent of Portland cement in the 1920s, cement concrete has been widely used in port terminals, submarine tunnels, cross-sea bridges, island and reef projects, etc. due to its wide source of raw materials, economy, strong adaptability, and good comprehensive performance. In marine engineering. In recent years, with the steady advancement of my country's "Belt and Road Strategy" and "South China Sea Strategy", the use of concrete materials continues to grow steadily. [0003] Relevant survey data show that major marine infrastructures built and put into use in developed countries in the 1970s, represented by cross-sea bridge projects, have gradually shown signs of premature damage and failure. Less than 10 yea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/22C04B20/02B28C5/08B28B1/14B28B11/24C04B111/20
CPCB28B1/14B28B11/247B28C5/08C04B18/22C04B20/023C04B28/04C04B2111/2015C04B2201/50C04B14/02C04B14/06C04B18/08C04B18/067Y02W30/91
Inventor 陈达朱钰文廖迎娣袁梦徐文强赵晖
Owner HOHAI UNIV
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