Testing device for evaluating storage stability of thermal-pouring-type crack pouring glue for asphalt pavements and testing method

A technology for storage stability and stability testing, which is applied in the field of storage stability test devices for hot-filling joint-filling adhesives. It can solve the problems of inability to accurately evaluate the storage stability of hot-filling joint-filling adhesives for asphalt pavement, and achieve storage stability. performance, large overall size, and high thermal conductivity

Inactive Publication Date: 2019-11-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the existing devices and methods cannot accurately evaluate the storage stability of asphalt pavement hot-filling joint-filling glue, the present invention proposes a test device and test method for evaluating the storage stability of asphalt pavement hot-filling joint-filling glue

Method used

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  • Testing device for evaluating storage stability of thermal-pouring-type crack pouring glue for asphalt pavements and testing method

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0028] Specific Embodiment 1: In this embodiment, the test device for evaluating the storage stability test of asphalt pavement hot-filling joint grouting glue is composed of a multi-section combined cylinder, two end covers and two pressure plates; The two ends of the cylindrical barrel, the two end caps and the multi-section combined cylindrical barrel are arranged between the two pressure plates.

[0029] This embodiment has the following beneficial effects:

[0030] 1. The inner diameter of the test device of the present invention is much larger than that of the sample tube (2.5cm in diameter), which can more realistically simulate the storage and segregation phenomenon of the joint glue; two end caps are used to seal the two ends of the multi-section combined cylinder, and two As a fixing device, the pressure plate is used to compress the multi-section combined cylinder and the two end caps, and there are sealing gaskets between the cavities to ensure the airtightness dur...

specific Embodiment approach 2

[0033] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the two end caps are respectively the upper end cap (4) and the lower end cap (5); the upper end cap (4) and the lower end cap (5) respectively A circular groove is provided, the upper end of the multi-section combined cylinder is embedded in the circular groove of the upper end cover (4), and the lower end of the multi-section combined cylinder is embedded in the circular groove of the lower end cover (5).

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the two pressing plates are respectively the upper pressing plate (6) and the lower pressing plate (7), and the upper pressing plate (6) is arranged on the top of the upper end cover (4) On the surface, the lower pressing plate (7) is arranged on the lower surface of the lower end cover (5); the upper pressing plate (6) and the lower pressing plate (7) are connected and tightened by several pull rods (8).

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Abstract

The invention discloses a testing device for evaluating storage stability of a thermal-pouring-type crack pouring glue for asphalt pavements and a testing method, and relates to the testing device fora test of the storage stability of the crack pouring glue and the testing method. The testing device and the testing method aim at solving the problem that by means of an existing device and an existing method, the storage stability of the thermal-pouring-type crack pouring glue cannot be accurately evaluated. The device is composed of a multi-section combined cylinder, an end cover and a pressing plate. The method comprises the steps of sample preparation, assembly of the testing device and full filling of the crack pouring glue, heating separation, cooling curing, collection and separate melting of the crack pouring glue at the two ends, testing for the softening point difference and viscosity difference, and acquisition of a softening point measurement value and a viscosity measurementvalue. The testing device is large in inner diameter, can more truly simulate the storage separation phenomenon of the crack pouring glue, meets the sampling requirements of different performance tests, has universal applicability, and can be recycled. According to the testing method, the separation degree can be more visually and conveniently reflected. The testing device and the testing methodare suitable for the test of the storage stability of the thermal-pouring-type crack pouring glue and separation behavior evaluation for polymer-modified asphalt materials.

Description

technical field [0001] The invention relates to a test device and a test method for the storage stability of hot-fill joint grouting glue. Background technique [0002] Cracks cannot be avoided in asphalt pavement, and the existence of cracks seriously affects the long-term performance and service life of asphalt pavement. The damage almost accompanies the entire service process of the pavement, and aggravates with the growth of road age. Polymer modified asphalt joint filling material (hereinafter referred to as "joint filling glue") is widely used in crack repair because of its better cost performance, which can improve driving quality and increase road service life. [0003] However, the preparation of joint glue is mostly prepared by physical blending and modification. During the preparation process, the styrene-butadiene-styrene ternary block copolymer (SBS) is made by mechanical stirring or shearing. , rubber powder (CR) and other modifiers gradually become thinner an...

Claims

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Application Information

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IPC IPC(8): G01N11/00G01N25/00G01N25/04
CPCG01N11/00G01N25/00G01N25/04
Inventor 曹丽萍杨晨李澳王伟军董泽蛟
Owner HARBIN INST OF TECH
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