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Device and method for estimating influence of surface lines on adhesion between asphalt and aggregates

A technology of surface texture and adhesion, applied in the field of evaluation of the adhesion of asphalt and aggregates, to achieve the effect of convenient operation and simple device structure

Active Publication Date: 2013-01-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods for evaluating the adhesion between asphalt and aggregates include water boiling method, gravimetric method, photoelectric colorimetry, NAT method, static water immersion method, capillary column method, etc., but none of them is aimed at the effect of aggregate surface texture on asphalt. Methods of Influence of Adhesion to Aggregate

Method used

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  • Device and method for estimating influence of surface lines on adhesion between asphalt and aggregates
  • Device and method for estimating influence of surface lines on adhesion between asphalt and aggregates
  • Device and method for estimating influence of surface lines on adhesion between asphalt and aggregates

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Experimental program
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Effect test

Embodiment 1

[0022] see figure 1 The asphalt and aggregate adhesion detection device of the present embodiment consists of a base 1, a support 2, a lower fixed rod 3, a lower chassis 4, an aggregate asphalt interlayer test piece 5, an upper chassis 6, a rotating rod 7, a speed sensor 8, The electric motor 9, the torque sensor 10, the control unit 11, the computer 12 and the A / D converter 13 are connected and constituted.

[0023] On the base 1, a lower fixed rod 3 and a support 2 are fixedly installed by threaded fasteners, the upper end of the lower fixed rod 3 is connected with a lower chassis 4 through a threaded connection, and a motor 9 is installed on the support 2 with a threaded fastening connector. The output shaft of 9 is connected with a connecting piece to install a rotating rod 7, and the lower end of the rotating rod 7 is connected with an upper chassis 6 through a threaded connection. The geometric shape of the upper chassis 6 is exactly the same as that of the lower chassis...

Embodiment 2

[0037] The structure of the asphalt-to-aggregate adhesion detection device is the same as in Example 1.

[0038] The method of using the above-mentioned device to detect the adhesion between asphalt and aggregates, in step 2), cut the blocky aggregates into slices and drill core samples into cylindrical specimens with a diameter of 100mm, and cut them into 50mm thick Grind the surface of the test piece to make it smooth and smooth. Use a milling machine to mill out 100 horizontal grains with a depth of 1.5mm and 100 intersecting longitudinal grains. Boil and clean with distilled water for 10 minutes to remove the residual stone powder on the surface of the test piece. and dirt, put it in an oven at 80°C and dry it, then heat the asphalt to 145°C, and apply it on the surface of the above-mentioned dried textured aggregate to form an asphalt film 5-2, pass two opposite aggregates through The asphalt film 5-2 is connected, and the thickness of the asphalt film 5-2 is controlled t...

Embodiment 3

[0041] The structure of the asphalt-to-aggregate adhesion detection device is the same as in Example 1.

[0042] The method of using the above-mentioned device to detect the adhesion between asphalt and aggregates, in step 2), cut the blocky aggregates into slices and drill core samples into cylindrical specimens with a diameter of 100mm, and cut them into 50mm thick Polish the surface of the test piece to make it smooth and smooth, use a milling machine to mill out 100 transverse grains with a depth of 2.5mm and 100 longitudinal grains intersecting with it, boil and clean it with distilled water for 10 minutes, and remove the residual stone powder on the surface of the test piece and dirt, put it in an oven at 80°C and dry it, then heat the asphalt to 135°C, and apply it on the surface of the above-mentioned dried textured aggregate to form an asphalt film 5-2, pass two opposite aggregates through The asphalt film 5-2 is connected, and the thickness of the asphalt film 5-2 is...

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Abstract

The invention relates to a device and method for estimating influence of surface lines on adhesion between asphalt and aggregates. A torsion test is carried out on aggregate asphalt interlayer test pieces of the same aggregate with different surface lines, so as to detect torsions corresponding to the different lines. Therefore, the shearing damage to the asphalt mixture can be actually simulated, so as to reflect the adhesion between the asphalt and the aggregates; the influence on the adhesion between the asphalt and the aggregates, caused by the surface roughness of the surfaces of the aggregates, can be actually simulated; and the reliable proof can be provided for the research on the adhesion between the asphalt and the aggregates. Furthermore, the device provided by the invention has the advantages of simple structure and convenience in operation.

Description

technical field [0001] The invention belongs to the technical field of asphalt and aggregate adhesion evaluation, and in particular relates to a device and a method for studying the influence of aggregate surface texture on the asphalt and aggregate adhesion. Background technique [0002] As a very important geotechnical material, asphalt is widely used in road engineering and building waterproofing engineering. In my country, more than 90% of the highway pavement that has been built is asphalt pavement, and the adhesion between asphalt and aggregate directly affects the use quality and durability of asphalt pavement, so the adhesion is an important index to evaluate the technical performance of asphalt . The water resistance (i.e. stripping resistance) of asphalt-coated aggregates is not only closely related to the properties of asphalt, but also related to the surface texture of aggregates. Therefore, in order to improve the performance of asphalt pavement, it is necessar...

Claims

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Application Information

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IPC IPC(8): G01N19/04
Inventor 裴建中杨彤孔维川刘玉张久鹏
Owner CHANGAN UNIV
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