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Method for quickly determining water content of particulate materials

A granular material, rapid measurement technology, applied in the field of concrete construction, to achieve the effect of reducing pollution, fast speed and cost saving

Active Publication Date: 2012-03-14
NO 2 ENG CO LTD OF CHINA RAILWAY CONSTR 11 BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During concrete mixing station or other on-site construction, it is necessary to convert the theoretical mix ratio of concrete or mortar into the construction mix ratio. The previous method is to use the drying method Or the alcohol combustion method is used to calculate the water content of various materials on site to convert the construction mix ratio. These test methods take a long time and have many paths, which are prone to human error and are greatly restricted by conditions. A group of samples is dried by drying method It takes at least 4 to 6 hours, and it is easy to burn off the organic matter with the alcohol combustion method. The various rapid water content analyzers currently appearing are greatly affected by the test accuracy and test temperature, and the reliability is low. It is included in the relevant test regulations and specifications, and generally dare not use or prohibit it in higher-level projects

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  • Method for quickly determining water content of particulate materials
  • Method for quickly determining water content of particulate materials
  • Method for quickly determining water content of particulate materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, measuring the water content of the sand on site.

[0034] a. First, according to the "General Concrete Sand, Stone Quality and Inspection Method Standard", make relevant technical index parameters; that is, the sample is sand in Zone II, with a fineness modulus of 2.68 and an apparent density of 2.65g / cm 3 ;Bulk density 1468kg / m 3 ;

[0035] b. Determine the equipment needed for the test (see Table 1).

[0036] Table 1 Table of instruments and equipment required for sand moisture content

[0037]

[0038] c. Make a sand standard curve according to the following steps:

[0039] (1) First, according to the corresponding test procedures, inspection methods and standards, dry the pellets to constant weight, and make relevant technical parameters, and pass through a 10mm sieve for use;

[0040] (2), taking 400g of dry sand as the benchmark respectively, according to the water content of 0, 2%, 4%, 6%, 8%, and 10% sand (as long as five or more are selecte...

Embodiment 2

[0066] Embodiment 2, measuring the moisture content of fly ash on site.

[0067] a. Check the relevant standards and parameters of fly ash;

[0068] b. Determine the equipment required for the test (see Table 4)

[0069] c. Make the fly ash standard curve according to the following steps:

[0070] (1) According to the corresponding test procedures, inspection methods and standards, take about 1500g of representative fly ash and dry it to constant weight, and make relevant technical parameters;

[0071] (2), take 100g dry fly ash as benchmark respectively, take dry fly ash quality by the water content of 0,2%, 5%, 8%, 12%, 16%, 20%, 25% fly ash, namely : 100g, 98g, 95g, 92g, 88g, 84g, 80g, 75g;

[0072] (3), take eight 250ml triangular flasks, calibrate the quality of the empty triangular flasks with glass flakes, and mark the bottle and glass flake numbers;

[0073] (4) Add about 200ml of water to each of the eight calibrated triangular flasks, put the dry fly ash mass cal...

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Abstract

The invention provides a method for quickly determining the water content of particulate materials, which comprises Standard of Quality and Testing Method of Normal Concrete Sand and Stone. The method comprises the following steps: firstly collecting samples of the particulate materials which are planed to be used on a construction site, then testing indoors to respectively determine the unit mass of a certain volume under the conditions of different water contents, drawing relevant standard curves by the calculation and the linear regression, directly weighting the mass of the wet-materials with the relevant volume by using the difference between the density of the particulate materials and the density of water and the relationship of the relevant standard curves, and obtaining the water content of the particulate materials to be tested by looking up the standard curves after a simple flask test and coversion, thereby quickly and effectively changing the theoretical mixing proportion which is selected indoors into the construction mixing proportion. The method has the advantages of simplicity, practicality, high testing speed, good effect, low cost, accurate test, wide application range, safety and environmental friendliness, and greatly improves the detection efficiency of the water content.

Description

technical field [0001] The invention relates to the field of concrete construction, in particular to a method for quickly measuring the water content of granular materials. Background technique [0002] During concrete mixing station or other on-site construction, it is necessary to convert the theoretical mix ratio of concrete or mortar into the construction mix ratio. The previous practice is to use the drying method or alcohol burning method to obtain the moisture content of various materials on site to convert. Construction mix ratio, these test methods take a long time and have many paths, which are prone to human error and are greatly restricted by conditions. It takes at least 4 to 6 hours for a group of samples to dry, but it is easy to use alcohol burning method. The loss of organic matter, the various rapid water content measuring instruments currently appearing are greatly affected by the test accuracy and test temperature, and the reliability is low. Moreover, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00
Inventor 胡嗣斌胡汉忠汪波刘小卫张翠峰
Owner NO 2 ENG CO LTD OF CHINA RAILWAY CONSTR 11 BUREAU GRP
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