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Method for testing adhesive property of asphalt and aggregate interface transition area in core wall dam

A technology for interfacial transition zone and bonding performance, which is applied in the direction of measuring devices, analysis materials, instruments, etc., can solve the problems of low accuracy of test results and difficult sampling, and achieve the effect of improving the performance evaluation system and fast bonding performance

Pending Publication Date: 2022-05-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a test method for the bonding performance of the asphalt-aggregate interface transition zone in the core wall dam, and solve the problems that the existing test method is difficult to sample and the accuracy of the test result is low

Method used

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  • Method for testing adhesive property of asphalt and aggregate interface transition area in core wall dam
  • Method for testing adhesive property of asphalt and aggregate interface transition area in core wall dam
  • Method for testing adhesive property of asphalt and aggregate interface transition area in core wall dam

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Embodiment

[0073] An asphalt concrete core wall dam is located in Gansu, using quartzite aggregate as asphalt concrete aggregate (lithology is neutral), and the asphalt is Karamay No. 70 asphalt;

[0074] Eight cuboid stones with a size of 100*100*50mm were made after grooving, and the roughness of the cuboid stones after grooving were 1.02, 1.04, 1.06, 1.08, 1.10, 1.12, 1.14, 1.16;

[0075] Put the cuboid stone after grooving into a 100*100*100mm steel mold, with the groove facing up, pour the dissolved asphalt above the cuboid stone after grooving to form a 100*100*100mm composite specimen , placed at room temperature for 24 hours, and after the asphalt was completely cooled, demolded to obtain 8 cube composite specimens;

[0076] Put 8 cube composite specimens into the direct shearing instrument respectively, and carry out the shearing test. Under the condition of the ambient temperature of -10~10 °C, the shearing speed of the loading system in the direct shearing instrument is set to...

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Abstract

The invention discloses a method for testing the bonding performance of an asphalt and aggregate interface transition area in a core wall dam, which specifically comprises the following steps: selecting a large stone with the same material as the actual aggregate, cutting the large stone into a plurality of cuboid stones, grooving each cuboid stone, and calculating the roughness of the grooved cuboid stones; placing the slotted cuboid stone into a steel mold, placing the slotted surface upwards, pouring the dissolved asphalt above the slotted cuboid stone to form a combined test piece, cooling, and demolding to obtain a cubic combined test piece; carrying out shear strength measurement on the cubic combined test piece, and establishing different roughness-shear strength relation curves according to the roughness of the plurality of slotted cuboid stones; selecting characteristic aggregate according to the shape of the aggregate; the roughness of the characteristic aggregate is calculated, and the shear strength of the asphalt and aggregate interface transition area is obtained through different roughness-shear strength relation curves. The problems that an existing testing method is large in sampling difficulty and low in testing result accuracy are solved.

Description

technical field [0001] The invention belongs to the technical field of asphalt concrete performance testing, and relates to a method for testing the bonding performance of the interface transition zone between asphalt and aggregate in a core wall dam. Background technique [0002] The asphalt concrete core wall dam is an earth-rock dam in which an asphalt concrete wall is set in the middle of the dam body as an anti-seepage body. Asphalt concrete has good anti-seepage and adaptability to deformation. When there is a lack of natural anti-seepage soil materials near the dam site, asphalt concrete can be used as the anti-seepage core wall of the earth-rock dam, and various permeable and semi-permeable sand and gravel materials or rockfills can be used for the dam shells on both sides. [0003] Asphalt mixture is a porous, discrete and non-homogeneous material, which is a mixture formed by fully mixing asphalt material with a certain viscosity and an appropriate amount and a ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 李炎隆刘云贺李阳周恒张庆军
Owner XIAN UNIV OF TECH
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