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Testing device and method for fiber and asphalt material bonding strength

A technology for bonding strength and asphalt materials, which is applied in the field of fiber and asphalt material bonding strength testing equipment, can solve the problems of poor repeatability, inability to effectively evaluate the bonding performance of fibers and asphalt concrete, and large dispersion of results. Simple, easy to make and operate, accurate test results

Pending Publication Date: 2019-09-03
HEBEI UNIV OF ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to study the bond strength of the fiber-asphalt mortar matrix interface and the effect of fiber length on the performance enhancement of asphalt concrete, the interface pull-out test can be carried out by direct tensile test, but this method has a large dispersion of results due to the poor repeatability of the operation , even cannot effectively evaluate the bonding performance of fiber and asphalt concrete

Method used

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  • Testing device and method for fiber and asphalt material bonding strength
  • Testing device and method for fiber and asphalt material bonding strength
  • Testing device and method for fiber and asphalt material bonding strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a fiber-asphalt bond strength test device includes a specimen preparation part and a tensile test part.

[0042] The specimen preparation part is used for pouring the specimen, including support 1, base 2 and asphalt base groove 3. Both support 1 and base 2 are kept perpendicular to the top surface of support 1, and the height of base 2 is lower than that of support 1. The asphalt The base groove 3 is placed directly above the base 2, and a central hole is opened at the axis of the asphalt base groove 3, and the fiber 4 extends into the cavity of the base 2 through the center hole. The upper end of the fiber 4 is provided with a fixing piece 6, and the lower end is provided A counterweight 5 .

[0043] The tensile test part is used to determine the bonding performance of the cast specimen, including a universal testing machine and a sample dish with a hole in the bottom. The prepared poured specimen is placed in the inverted sample dish, and ...

Embodiment 2

[0063] A device for testing the bonding strength of fibers 4 and asphalt materials, including a specimen preparation part and a tensile test part.

[0064] The specimen preparation part is used for pouring the specimen, including support 1, base 2 and asphalt base groove 3. Both support 1 and base 2 are kept perpendicular to the top surface of support 1, and the height of base 2 is lower than that of support 1. The asphalt The base groove 3 is placed directly above the base 2, and a central hole is opened at the axis of the asphalt base groove 3, and the fiber 4 extends into the cavity of the base 2 through the center hole. The upper end of the fiber 4 is provided with a fixing piece 6, and the lower end is provided A counterweight 5 .

[0065] The tensile test part is used to determine the bonding performance of the cast specimen, including a universal testing machine and a sample dish with a hole in the bottom. The prepared poured specimen is placed in the inverted sample di...

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Abstract

The invention discloses a testing device for fiber and asphalt material bonding strength. The device comprises a test specimen preparation part and a tension testing part, wherein the test specimen preparation part comprises a bracket, a base and an asphalt foundation trench; the axial center of the asphalt foundation trench is provided with a center hole; a fiber penetrates through the center hole to extend into the hollow cavity of the base; the upper end of the fiber is provided with a fixed part, and the lower end of the fiber is provided with a counterweight component; and the tension testing part comprises a universal tester and a sample containing vessel, wherein the fiber penetrates through the hole of the sample containing vessel. The invention also discloses a testing method forfiber and asphalt material bonding strength. The invention has the beneficial effects that the testing device has a simple structure, is convenient in manufacture and operation and is high in test specimen manufacture accuracy. Through a pull-out test, bonding strength between different fibers and asphalt mortar can be tested so as to be convenient in finding the fiber with a best bonding effect with asphalt. From the perspective of the bonding performance of the fibers and an asphalt matrix, the bonding strength between the fibers and the asphalt mortar is measured to realize the evaluation and the model selection of fibers used for roads.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a device and method for testing the bonding strength of fiber and asphalt material. Background technique [0002] At present, adding reinforcing fibers to asphalt mixture has become an effective means to improve the performance of asphalt mixture, and has received extensive attention and attention. Adding fibers into asphalt concrete can improve the high temperature stability, low temperature crack resistance and water stability of asphalt concrete, and can effectively improve the tensile, compressive, shear and impact strength, which greatly improves the asphalt pavement Fiber-reinforced asphalt concrete pavement is one of the development directions of asphalt concrete pavement at home and abroad. [0003] Extensive research has been carried out on the reinforcement effect of fibers at home and abroad. However, previous studies mainly focused on the performance test o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04G01N1/28
CPCG01N19/04G01N1/28
Inventor 高颖和燕超吴清舟张斌李晓岭崔振杰王敬郝雷杰郭庆林宁晓霞董素娴许子龙杨邯超
Owner HEBEI UNIV OF ENG