Method for improving test precision of cement dosage for stabilizing macadam base

A technology for stabilizing the crushed stone base and testing accuracy. It is used in chemical analysis by titration method, which can solve the problems of cement dosage construction variation, unreasonable economy, large shrinkage, etc., to achieve a smooth standard curve, improve test accuracy, and increase area. big effect

Inactive Publication Date: 2019-09-06
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology

However, if too much cement is used, although the strength can be increased, it will cause greater shrinkage and more cracks, and it is also unreasonable economically.
In addition, in actual engineering, there is still variability in cement dosage construction

Method used

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  • Method for improving test precision of cement dosage for stabilizing macadam base
  • Method for improving test precision of cement dosage for stabilizing macadam base

Examples

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Embodiment

[0025] A method for improving the accuracy of cement dose testing for stabilizing a gravel base, specifically comprising the steps of:

[0026] Step 1: Draw the standard curve

[0027] 1) Preparation and sampling of the mixture Mix the mixture according to the cement dosage of 0, 2%, 4%, 6% and 8%; The optimum water content of the soil, the water added to the soil should be the same as the water used on the construction site; two samples were taken for each mixture according to the quartering method, and the quantity of each sample was 2000g, a total of 10 samples; Pass through a 13.2mm sieve, and take 500g as a standard sample;

[0028] 2) Stirring and standing put a single standard sample into the sample holder, add 10% ammonium chloride solution twice the mass volume of the standard sample, stir for 4 minutes, prevent precipitation for 10 minutes, then transfer the supernatant to a 300ml beaker Stir well and cover with a watch glass as the solution to be tested;

[0029]...

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Abstract

The invention relates to a testing method, in particular to a method for improving the test precision of the cement dosage for stabilizing a macadam base. The technical scheme of the method for improving the test precision of the cement dosage for stabilizing the macadam base is as follows: mixtures of multiple proportions pass through sieve pores of 13.2 mm, a series of standard samples are prepared, testing is conducted through an EDTA method, and then a standard curve is drawn; and a to-be-tested mixture is selected to pass through the sieve pores of 13.2 mm, a to-be-tested sample is prepared, testing is conducted through the EDTA method, and the cement dosage of the to-be-tested sample is obtained by comparing with the standard curve. According to the method for improving the test precision of the cement dosage for stabilizing the macadam base, the influence of artificial sampling factors on the test result can be lowered, and thus the control precision of the cement dosage is improved.

Description

technical field [0001] The invention relates to a test method, in particular to a method for improving the test accuracy of cement dosage for stabilizing gravel base. Background technique [0002] The dosage of cement is an important index affecting the strength of the cement-stabilized crushed stone base, and the size of the dose is directly related to the quality of the base. With the increase of cement dosage, the physical and mechanical properties of cement-stabilized macadam will also be significantly improved. However, if too much cement is used, although the strength can be increased, it will cause greater shrinkage and more cracks, and it is also unreasonable economically. In addition, in actual engineering, there is still variability in cement dosage construction. [0003] Therefore, working out a method that can improve the test accuracy of cement dosage for cement-stabilized macadam base will ensure that under the premise of using a lower cement dosage in the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 徐岩田泽峰
Owner SHENYANG JIANZHU UNIVERSITY
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