Humidity preservation method of fine aggregate asphalt mixture specimen

A technology of asphalt mixture and fine aggregate, which is applied to the analysis of materials, material weighing, instruments, etc. It can solve the problems of lack of methods for asphalt mixture humidity preservation, etc., and achieve small space occupation, easy access to instruments, and accurate humidity values Effect
CN106872304BActive Publication Date: 2019-10-25WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2019-10-25

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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.
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Description

technical field

[0001] The invention belongs to the field of road engineering, and in particular relates to a method for maintaining the humidity of fine aggregate asphalt mixture specimens. Background technique

[0002] With the rapid development of expressway construction in our country, the problem of pavement disease is also particularly prominent. Water damage to asphalt pavement has become one of the most common early diseases of asphalt pavement in all countries in the world. At present, domestic and foreign scholars' researches on water damage mainly focus on the damage caused by water entering the interior of asphalt mixture in liquid form. For example, the immersion Marshall test and freeze-thaw splitting test in the Marshall asphalt mixture design method adopted in China are to subject the specimen to liquid water treatment such as static water immersion and freeze-thaw cycle. The freeze-thaw splitting tensile strength ratio before and after was used to evaluate...

Claims

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