Materials Reports  2021, Vol. 35 Issue (Z1): 291-296 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Experimental Study on Frost Resistance and Crack Resistance of Bases in Cold Areas Based on Vibration Mixing Technology |
| CHEN Ke1, SUN Fen2, LIANG Shuang1, ZHANG Haitao3
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1 Heilongjiang Provincial Highway Survey and Design Institute, Harbin 150080, China
2 Heilongjiang Polytechnic, Harbin 150080, China
3 College of Civil Engineering, Northeast Forestry University, Harbin 150040, China |
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Abstract In order to improve the shrinkage performance of semi-rigid base of cement stabilized macadam, the mixing of the mixture is uneven, and improve the road performance such as frost resistance of the base layer, vibration mixing technology was used to improve the performance of the base layer and improve its crack resistance and frost resistance and other road performance. Vibration mixing technology is a mechanical strengthening technology that can better improve the mixing quality. In this paper, the frost resistance and shrinkage of vibrating agitated cement stabilized macadam mixture were studied. The freeze-thaw tests were carried out on two different cement stabilized macadam mixtures. The test results showed that the indoor vibrating cement stabilized macadam base material was frozen. The strength loss after the melting cycle is less than that of the non-vibrating agitated cement stabilized macadam mixture after freezing and thawing, and the BDR value of the vibrating and stirring cement stabilized macadam base material is larger than the BDR value of the non-vibrating stirring, and the effect is more obvious. It is thus concluded that the vibration stirring technique helps to enhance the frost resistance of the base material. According to the comparative analysis of the shrinkage performance test, the experimental study shows that the vibration stirring energy can significantly reduce the shrinkage strain and shrinkage coefficient of the mixture; and the results of the electron microscope test also prove that the cement binder can be better dispersed around the aggregate under the action of vibration. In order to make the mixture better as a whole, it can be seen from the test that the vibration is more uniform and the crack width is smaller in the vibration-mixed cement stabilized macadam mixture, which indicates that the vibration can enhance the crack resistance of the base material and reduce the occurrence of cracks.
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Published: 16 July 2021
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| Fund:Key Project of Heilongjiang Provincial Departmnt of Transportation. |
| About author:: Ke Chen graduated from Heilongjiang Transportation Technical College (now Heilongjiang Institute of Engineering). He is a researcher-level senior engineer and a supervision engineer of the Ministry of Communications. From 1993 to 2006, he served as the director of the supervision office, the person in charge of the supervision project, the office director, and the manager of the maintenance branch of the Heilongjiang Provincial Highway Engineering Supervision Consulting Company. From 2006 to 2009, he passed the examination of the deputy director-level cadre of the Department of Communications and was appointed as the deputy general manager of the company by the party group of the department. In June 2009, he served as the general manager of Heilongjiang Provincial Highway Engineering Supervision Consulting Company, and in December 2016, he served as the president of Heilongjiang Provincial Highway Survey and Design Institute. He has published more than 10 papers in academic journals at home and abroad, and applied for more than 20 national invention patents and utility model patents. Won the first prize of Heilongjiang Provincial Science and Technology Progress Award and presided over a number of scientific research projects.Shuang Liang graduated from Northeast Forestry University in 2018 with a master's degree. He is currently working in Heilongjiang Provincial Highway Survey and Design Institute as an engineer. As the first author, he has published more than 10 papers in academic journals at home and abroad, and applied for 7 national patents, of which 6 were authorized. At the same time, he won the second prize of Science and Technology Progress Award from the Transportation Association and presided over and participated in a number of provincial and ministerial scientific research projects. The research work mainly focuses on subgrade and pavement structure and materials, and road survey and design. |
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