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Method for determining steel slag content of steel slag soil

A determination method and technology of steel slag, which is applied in the direction of chemical analysis by titration method, can solve the problem of uniformity, steel slag content inspection and other problems, and achieve the effect of ensuring the quality of the project

Active Publication Date: 2017-07-21
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no simple and effective method for the amount of steel slag in the paving of steel slag-stabilized soil road beds, and it is impossible to solve the problem of uniformity of steel slag-soil mixture during construction and the steel slag mixed with steel slag after the completion of steel slag-stabilized soil road bed paving. Quantitative test problem

Method used

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  • Method for determining steel slag content of steel slag soil
  • Method for determining steel slag content of steel slag soil
  • Method for determining steel slag content of steel slag soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Solution preparation:

[0033] (1) 0.1mol / L "disodium ethylenediaminetetraacetic acid (referred to as EDTA disodium) standard solution: Accurately weigh 37.226g of EDTA disodium (analytical pure) with an analytical balance, dissolve it in slightly heated carbon dioxide-free distilled water, wait until After all dissolved and cooled to room temperature, dilute to 1000mL.

[0034] (2) 10% ammonium chloride (NH 4 CL) solution: put 50g of ammonium chloride (analytical pure or chemically pure) in a 1L polyethylene bucket, add 1000mL of distilled water, and shake fully to completely dissolve the ammonium chloride.

[0035] (3) 1.8% sodium hydroxide (containing triethanolamine) solution: Weigh 18g of sodium hydroxide (NaOH) of analytical grade), put it into a clean and dry 1000mL beaker, add 1000mL of distilled water to dissolve it completely, and wait for the solution to cool to room temperature Finally, add 2 mL of triethanolamine (analytical grade), stir well and store...

Embodiment 2

[0047] (1) Select and use about 300g of representative steel slag soil in six typical sections of Yewu Expressway Project, and put it into a beaker;

[0048] (2) Referring to steps (2) and (3) in Example 1, measure the consumption of disodium EDTA;

[0049] (3) Use the standard curve obtained in Example 1 to determine the steel slag content of the soil sample according to the consumption of disodium EDTA.

[0050] Table 2 EDTA consumption

[0051]

[0052] The measured EDTA consumption is 9.7mL, and the steel slag content is 8.1wt%.

Embodiment 3

[0054] (1) Prepare 5 steel slag soil samples with a steel slag content of 8.0wt% in the laboratory, and the moisture content is the same as that of the on-site paving;

[0055] (2) Referring to steps (2) and (3) in Example 1, the average consumption of disodium EDTA standard solution was measured to be about 9.5 mL.

[0056] Table 3 EDTA consumption

[0057]

[0058] Compared with the standard curve, it is found that the content of steel slag is about 7.9wt%, which meets the relevant requirements for the detection accuracy of paving in the steel slag-stabilized soil test section.

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Abstract

The invention belongs to the field of subgrade engineering, and relates to a method for determining the steel slag content of steel slag soil. The method comprises the following steps: (1) determining a standard curve, and (2) detecting a sample. As application to determining of the steel slag content of the steel slag soil serving as a novel subgrade material and checking of the mixing uniformity and the structural strength of the steel slag soil, the method can be used for determining the steel slag content of the steel slag soil serving as the novel subgrade material and overcomes the shortcoming that the mixing uniformity and the steel slag content of the steel slag soil of a steel slag soil subgrade material in engineering application cannot be accurately obtained.

Description

technical field [0001] The invention belongs to the field of roadbed engineering and relates to a method for determining the amount of steel slag in steel slag soil. Background technique [0002] Steel slag is a by-product of the steelmaking industry and a bulk solid waste produced during steelmaking. As a big steel country, my country produces tens of millions of tons of steel slag every year, but the comprehensive utilization rate of steel slag is not high. A large amount of accumulated steel slag occupies arable land and pollutes the environment. [0003] Steel slag contains C 2 S, C 3 S and other hydraulic minerals are similar to lime and cement active ingredients, which lay the foundation for its resource application. At present, the utilization of steel slag at home and abroad is mainly concentrated in road engineering, finely ground steel slag is used in cement clinker, concrete, preparation of ceramic products, and adsorbent methods for wastewater treatment. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 李新明孙玉周祝彦知卢天佑刘晨辉蔡鑫袁振霞林国华管佳佳刘晓爽
Owner ZHONGYUAN ENGINEERING COLLEGE
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