Method for testing bonding performance between asphalt and acid aggregate by considering water flow effect
A bonding performance and testing method technology, applied in the direction of measuring devices, analyzing materials, using mechanical devices, etc., can solve the problems of large subjective factors, inability to effectively evaluate the bonding performance of asphalt and aggregates, complex bonding performance, etc.
Pending Publication Date: 2022-04-26
XIAN UNIV OF TECH
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Problems solved by technology
This method has many subjective factors and cannot effectively evaluate the bonding performance of asphalt and aggregates.
In addition, asphalt concrete core wall dams sometimes leak, and under the influence of seepage water, the bonding performance of the asphalt-acid aggregate interface transition zone in the core wall asphalt concrete is more complicated
However, under the influence of water flow, there are few researches on the method of testing the bonding performance of the interface transition zone between asphalt and acid aggregate.
Method used
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Embodiment
[0075] The asphalt concrete core wall dam in a certain area in Shaanxi is made of acid aggregate granite gravel, and the asphalt is Karamay No. 70 A grade asphalt;
[0076] Make 8 grooving stones with a size of 100*100*50mm, and the roughness of the grooving stones is 1.02, 1.04, 1.06, 1.08, 1.10, 1.12, 1.14, 1.16;
[0077] Put the grooved cuboid stone into a 100*100*100mm steel mold with the groove facing up, and pour the dissolved asphalt on top of the grooved stone to form a 100*100*100mm combined test piece. Place it at room temperature for 24 hours, and after the asphalt is completely cooled, demould to obtain 8 asphalt-acid aggregate composite specimens;
[0078] Put 8 asphalt-acid aggregate composite specimens into the direct shear apparatus respectively, and conduct the shear test. Under the condition of ambient temperature -10~10℃, set the shear speed of the loading system in the direct shear apparatus to 0.8 mm / min, during the direct shear test, water flows through ...
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The invention discloses a method for testing the bonding performance between asphalt and acid aggregate by considering the action of water flow, which specifically comprises the following steps: selecting a large stone, cutting the large stone into a plurality of cuboid stone blocks, grooving each cuboid stone block to obtain a grooved stone block, and calculating the roughness of the grooved stone block; a grooving stone block is put into a mold, the dissolved asphalt is poured above the grooving stone block, a combined test piece is formed, cooling and demolding are conducted, and an asphalt-acid aggregate combined test piece is obtained; the method comprises the following steps: putting an asphalt-acid aggregate combined test piece into a direct shear apparatus to carry out shear strength measurement by considering the influence of a water flow effect at an asphalt-acid aggregate interface, and establishing different roughness-shear strength relation curves according to the roughness of a plurality of grooving stones; selecting characteristic acidic aggregate according to the shape of the acidic aggregate; 3D scanning is carried out on the characteristic acid aggregate, the roughness of the characteristic aggregate is obtained, and the shear strength of the asphalt and acid aggregate interface transition area considering the water flow effect is obtained through different roughness-shear strength relation curves.
Description
technical field [0001] The invention belongs to the technical field of performance testing of asphalt concrete, and relates to a method for testing the bonding performance between asphalt and acidic aggregates considering the action of water flow. Background technique [0002] The asphalt concrete core 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 no natural anti-seepage soil material 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 shell on both sides. [0003] Asphalt mixture is a porous, discrete and heterogeneous material. It is a mixture formed by fully mixing asphalt material with a certain viscosity and an appropriate amount and a certain grade of mineral ...
Claims
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Login to View More IPC IPC(8): G01N19/04
CPCG01N19/04Y02A30/30
Inventor 李阳李炎隆王瑞骏张庆军
Owner XIAN UNIV OF TECH