高温-荷载耦合作用下废旧叠层轮胎隔震垫劣化机理分析

doi:10.11896/cldb.19100207

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Abstract To study the degradation damage of the scrap tire rubber pads (STP) under the coupling action of high temperature and load, selected geo-metry size of 180 mm×180 mm×69 mm 6-layers of STP, placed it in high temperature of 100 ℃ and the normal temperature 20 ℃, load of 4 MPa, 5 MPa, 6 MPa under the coupled condition of temperature erosion test of 308 h. Then,scanning electron microscope (SEM) and quasi static loading test, observed the micromorphological changes of rubber molecules, STP deformation process of carbon black and tires mobile appearance, combined with the pseudo-static test results, the mechanism of STP degradation under high temperature-load coupling was comprehensively elucidated. The results show that the coupling action of high temperature and load significantly increases the cross-linking density and local molecular weight of STP rubber surface layer, and the formation of saturated chemical bonds, reduced reactivity and morphological changes of rubber molecules inside STP leads to the maximum increase of the vertical stiffness of STP by 31.9% at 4 MPa. The horizontal equivalent stiffness is increased, but the degradation rate is faster than normal temperature. The vertical deformation performance ratio becomes worse, which is within 2% under different design compressive stresses, the maximum single-lap energy consumption is reduced by 2.5% compared with normal temperature. The research results can provide theoretical reference for the extension and application of new type of under-wall laminated isolation structures in high-intensity rural areas.

Key words： temperature-load coupling STP damage mechanism mechanical property

Published: 06 November 2020

CLC number:

TH352.12

Fund:National Natural Science Foundation of China (51568064),Autonomous Region Education Department Natural Science Key Project (XJEDU2020I005).

About author:: Guangtai Zhang, male, professor of Xinjiang University, Ph.D.tutor, national registered supervision engineer. He is currently the deputy general manager and office director of the new campus construction headquarters of Xinjiang University, the party secretary of the School of Architecture and Engineering in Xinjiang University, and the academic leader of the discipline “structural project” in the Xinjiang Uygur Autonomous Region. The key member of the National University Specialty and Autonomous Region Excellent teaching team; eighth session of the Director of the Xinjiang Civil Engineering Society, Xinjiang Housing and Construction Department of High-strength steel and high-strength concrete application Expert group members, Urumqi high-performance Concrete Committee members, the Autonomous Region Science and Technology Progress Award assessment experts, the Autonomous Region Scientific and Technological review expert 2, invention patent 1, Practical Patent 2, published more than 90 papers, organized in the design of more than 10. Has won the Auto-nomous Region Science and Technology Progress Award 1, won the Autonomous Region Natural Science Outstanding Thesis Award 3. Editor-in-chief of the National Planning Teaching Materials 1; presided over the Xinjiang Uygur Autonomous Region Fine Course 1, had obtained the Autonomous Region higher Education Achievement First prize 1, Xinjiang University Higher Education Achievement Grand prize, Xinjiang University “Outstanding Master Tutor”. The research work mainly includes the new building material and the earthquake isolation and so on.

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	ZHANG Guangtai
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Cite this article:

ZHANG Guangtai,WANG Mingyang,GENG Tianjiao, et al. Experimental Study on Mechanical Properties of Scrap Tire Rubber Pads Under High Temperature-Load Coupling[J]. Materials Reports, 2020, 34(20): 20187-20192.

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http://www.mater-rep.com/EN/10.11896/cldb.19100207 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20187

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