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Method for determining lime dosage in long-life limy stabilized soil

A technology of lime-stabilized soil and determination method, which is applied in the direction of chemical analysis by titration, preparation of test samples, etc.

Inactive Publication Date: 2005-04-27
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to measure a certain age, especially the determination of lime dosage in lime soil after several months or even years, has not yet seen relevant reports.

Method used

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  • Method for determining lime dosage in long-life limy stabilized soil
  • Method for determining lime dosage in long-life limy stabilized soil
  • Method for determining lime dosage in long-life limy stabilized soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Calibration of EDTA standard solution: Use a pipette to draw 25ml of calcium standard solution into a 300ml Erlenmeyer flask, dilute with 100ml of distilled water, then add 10 drops of 10% hydroxylamine hydrochloride, 2ml of triethanolamine and 25ml of Ammonia-ammonium chloride buffer solution, then add a volume such as the size of soybeans, 0.01-0.05g K-B mixed indicator, shake well. Titrate with 0.05M ethylenediaminetetraacetic acid EDTA solution, when the color of the solution changes from wine red at the beginning to pure blue, it means reaching the end point of titration. According to the volume of consumed EDTA solution, find the titer T of EDTA standard solution to calcium oxide:

[0054] T = C · V 1 V 2 · M CaO M ...

Embodiment 2

[0074] Embodiment two: the standardization of ethylenediaminetetraacetic acid EDTA standard solution: draw 25ml calcium standard solution into the Erlenmeyer flask of 300ml with pipette, dilute with the distilled water of 100ml, then add 10 drops of 10% hydroxylamine hydrochloride successively, 2ml Triethanolamine and 30ml of ammonia-ammonium chloride buffer solution, then add soybean-sized K-B, 0.01-0.05g mixed indicator, shake well. Titrate with 0.05M ethylenediaminetetraacetic acid EDTA solution, when the color of the solution changes from wine red at the beginning to pure blue, it means reaching the end point of titration. According to the volume of consumed EDTA solution, find the titer T of EDTA standard solution to calcium oxide:

[0075] T = C · V 1 V 2 · M ...

Embodiment 3

[0086] Embodiment three: the calibration of ethylenediaminetetraacetic acid EDTA standard solution: draw 25ml calcium standard solution into the Erlenmeyer flask of 300ml with pipette, dilute with the distilled water of 100ml, then add 10 drops of 10% hydroxylamine hydrochloride successively, 2ml of Triethanolamine and 28ml of ammonia-ammonium chloride buffer solution, then add K-B, 0.01-0.05g mixed indicator, shake well. Titrate with 0.05M ethylenediaminetetraacetic acid EDTA solution, when the color of the solution changes from wine red at the beginning to pure blue, it means reaching the end point of titration. According to the volume of consumed EDTA solution, find the titer T of EDTA standard solution to calcium oxide:

[0087] T = C · V 1 V 2 · M CaO ...

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Abstract

The determining process of lime content in long term lime stabilized soil includes the following steps: weighing lime soil sample, adding hydrochloric acid solution in the concentration of 50 vol% in 50 ml to dissolve the lime soil via stirring, transferring the supernatant into conical flask, complex titrating with standard 0.05 mol / L concentration EDTA solution and determining the volume of consumed standard 0.05 mol / L concentration EDTA solution Vlime soil; determining the Vpure soil and Vlime in similar process; and calculating the percentage content of lime in the lime soil based on corresponding formula. The method is simple, accurate and widely applicable.

Description

technical field [0001] The invention relates to the technical field of highway engineering. During the highway construction process, including the road use period, a commonly used method for detecting lime dose in lime soil, a base material, is particularly suitable for the detection method of lime dose in long-age lime-stabilized soil. Background technique [0002] Lime-stabilized soil is a commonly used base material in road semi-rigid bases. Due to its low cost, easy construction, and good engineering properties, lime-stabilized soil accounts for a large proportion of the current road structure in my country and is widely used. Used in road engineering of all levels. [0003] The construction quality of lime-stabilized soil base is directly related to the service life of a road. One of the indicators for quality inspection is the determination of lime dosage in lime soil. According to the JTJ057-94 test method issued by the Ministry of Communications, the lime dosage is d...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N31/16
Inventor 张超
Owner CHANGAN UNIV
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