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Fine aggregate asphalt mixture sample humidity curing method

A technology of asphalt mixture and fine aggregate, which is applied in the field of humidity preservation of fine aggregate asphalt mixture specimens, can solve the problems such as the lack of methods for asphalt mixture humidity preservation, and achieve small space occupation, time saving and easy operation Effect

Active Publication Date: 2017-06-20
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that there is a lack of a method for asphalt mixture humidity preservation to meet the requirements of the test conditions.

Method used

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  • Fine aggregate asphalt mixture sample humidity curing method
  • Fine aggregate asphalt mixture sample humidity curing method

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Embodiment Construction

[0021] The following examples further illustrate the technical solutions of the present invention, but are not intended to limit the protection scope of the present invention.

[0022] The method for moisture curing of the fine aggregate asphalt mixture specimen of the present invention is as follows:

[0023] 1) Preparation of fine aggregate asphalt mixture specimens

[0024] Use a rotary compactor to form fine aggregate asphalt mixture (FAM) specimens, control the porosity, and then drill and cut the standard specimens with a diameter of 150mm and a height of 70mm. The porosity is 4.3%± 0.3% of the standard specimens are cut, and the upper and lower ends of the molded specimens are cut by 15mm with an automatic cutting saw to obtain a specimen with a middle height of 40mm and a diameter of 150mm, which is cut along with a core drill (12mm drill) The outer ring, middle ring and inner ring of the back test piece were drilled respectively, and finally a test piece with a height of 40...

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Abstract

The invention discloses a fine aggregate asphalt mixture sample humidity curing method. The method comprises the following steps: forming and preparing a standard fine aggregate asphalt mixture sample according to designed grading and asphalt dosage; placing the sample in a vacuum dryer, regulating vapor pressure in the vacuum dryer by use of a saturated saline solution, so as to achieve 0-100% middle relative humidity; installing a temperature-humidity recorder in the vacuum dryer to record temperature-humidity change in the vacuum dryer in real time; placing the vacuum dryer in a biochemical incubator at 20 DEG to perform the humidity curing, wherein the sample curing humidity requirement is achieved when the sample quality maintains stable, and relative humidity is relative humidity in the vacuum dryer. The invention provides the method of performing the fine aggregate mixture sample curing under a vacuum state by using a chemical reagent as a humidity curing agent; the method has obvious innovation in the reasonability of the curing and the convenience in operation, and the curing effect is excellent.

Description

Technical field [0001] The invention belongs to the field of road engineering, and specifically relates to a method for moisture curing of fine aggregate asphalt mixture specimens. Background technique [0002] With the rapid development of highway construction in our country, the problem of road surface diseases also appears to be particularly prominent. Among them, the water damage of asphalt pavement has become one of the most common early diseases of highway asphalt pavement in the world. At present, domestic and foreign scholars' research on water damage mainly focuses on the damage caused by water entering the asphalt mixture in liquid form. For example, the soaking Marshall test and freeze-thaw splitting test in the Marshall asphalt mixture design method adopted in China are liquid water treatments such as static water soaking, freeze-thaw cycle, etc., and the residual stability and freeze-thaw cycle of the soaked water obtained before and after the immersion The freeze-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00C04B26/26
Inventor 罗蓉吕慧杰刘涵奇冯光乐
Owner WUHAN UNIV OF TECH
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