Method for quickly determining water content of particulate materials

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...

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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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