Novel fine aggregate density and water absorption testing method and system

Abstract

The invention relates to a novel fine aggregate density and water absorption testing method and system. The method comprises the following steps: preparing fine aggregate samples with different water contents by adding water with different set masses into fine aggregate and covering the materials, taking the sample which is closest to a saturated surface dry state through a slump cylinder method, and air-drying while stirring by adopting a blower and micro-warm air or adding a small amount of water properly to stir and wet the sample, and therefore, the test efficiency can be greatly improved. Moreover, the samples are prepared from water with different masses, so that the loss of part of fine powder of the fine aggregate samples due to water pouring can be avoided, and the accuracy of fine aggregate grading is ensured; and only the test sample closest to the saturated surface dry state is subjected to short-time micro-warm air drying or even does not need to be subjected to blowing air drying, the problems that the fine aggregate test sample is not uniform in dryness and wetness or is excessively dried due to excessive blowing and fine aggregate particles are blown away in the air drying process can be avoided, and the test result test accuracy can also be ensured.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a novel fine aggregate density and water absorption testing method and system. Background technique [0002] The porosity of asphalt concrete is closely related to its water permeability, aging resistance, permanent deformation resistance and stability: if the porosity is too large, water seepage and water damage will easily occur, and early diseases such as looseness and pits will be formed; if the porosity is too small , the stability of asphalt concrete is low, and it is easy to form rutting and other diseases. Therefore, in the actual application process, the design void ratio of asphalt concrete is generally required to be 3-6%, so as to ensure that the asphalt concrete pavement has good road performance during use. [0003] Fine aggregate is an important part of asphalt concrete, which mainly plays the role of filling the skeleton voids of asphalt concrete coarse a...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the test method used in the current specification has a lengthy and complicated sample preparation process, and there is a lot of human interference, resulting in poor test data reproducibility and repeatability; 3 to 5 times) reduces the test efficiency, and also makes some test personnel not conduct tests according to the standard, and take out the fine aggregate samples that have not reached the true saturated surface dry state for the next test, resulting in the density and water absorption of the fine aggregate There is an error in the test results

Images