Abstract
In order to understand the influence of the vibration mixing method on the performance of cement-stabilized aggregate mixture (CSAM), in this study, an unconfined compressive strength test, drying shrinkage test and the influence of gradation characteristics on compressive strength were used to systematically analyze the performance of CSAM based on vibration mixing. At the same time, the influence mechanism of vibration mixing on the interface transition zone of cement aggregate was analyzed by use of a scanning electron microscope (SEM), and the influence of the mixing method on cement dispersion uniformity was studied by the ethylene diamine tetraacetic acid (EDTA) titration method. The results show that 7 days of unconfined compressive strength and crack resistance of the CSAM with vibration mixing is better than those of the ordinary mixing, and the aggregate grade has a great influence on the compressive strength of the CSAM. Vibration mixing can improve the micro-water-cement ratio uniformity of CSAM and significantly improve the bonding condition of the interface transition zone between cement paste and aggregate, thus enhancing the structural compactness of CSAM. The dispersion uniformity of cement under the vibration mixing is better than that of ordinary mixing.
Highlights
The semi-rigid base has the characteristics of high strength, excellent stability and high economical efficiency, and since the 1980s, it has become the most widely used grass-roots road construction in China
The results show that the vibration mixing improves the homogeneity of cement-stabilized aggregate mixture (CSAM), and the microstructure is uniform and dense, which leads to high compressive strength and good dry shrinkage
The results show that the unconfined compressive strength of CSAM made by vibration mixing is higher than that of ordinary mixing, and the unconfined compressive strength of laboratory vibration mixing specimens is better than that of site vibration mixing conditions
Summary
The semi-rigid base has the characteristics of high strength, excellent stability and high economical efficiency, and since the 1980s, it has become the most widely used grass-roots road construction in China. The semi-rigid base has the disadvantage of easy cracking. With the rapid increase in heavy load and overload vehicles, it has poor durability and cracks. The main reason for these issues is that the semi-rigid base material is uneven and divided. Cement-stabilized aggregate mixture (CSAM) is a typical semi-rigid base material, which is a kind of heterogeneous material with low cement dosage. It is causes segregation, crushing, loosening and other defects in the mixing, transportation, paving and rolling stages, but improving
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
