Affected by the increased traffic density, overloading, speeding and other service loads coupling of poor environmental conditions, concrete surface layers of structures such as highways and bridges often suffer from premature failure and short service life, greatly affecting their performance and significantly increasing maintenance costs. Polymer modified cement concrete can improve the toughness and bonding strength of concrete, endowing it with excellent wear resistance, corrosion resistance, freeze-thaw resistance, and other properties.
The commonly used polymer modification methods require excessive polymer dosage and high cost. In response to this issue, the team studied the impact of gradient changes in polymer dosage on the compressive strength, flexural strength, bonding strength, and freeze-thaw resistance of cement mortar by designing different polymer dosages at different layer depths on the same cement mortar sample. The results show that the gradient modified design improves the overall compressive strength, flexural strength, bonding strength, and freeze-thaw resistance of the mortar to varying degrees with the same total polymer content. It can effectively reduce the amount of polymer used while ensuring performance. This provides a solution for the low-cost and efficient application of polymer modified concrete and lays a solid foundation for further work on gradient concrete.
