Study On The Road Property Of Admixtures Concrete Road

Cement concrete pavement has been widely used as an important form of highway pavement for it has the advantages of less maintenance workload, less energy consumption, easy to construct and easy to adopt the traffic rank and the environment, etc. However, its application in road construction has been limited due to it has many shortcomings such as high brittleness and lower wearability. It is a good modification to use mineral admixture and polymer modified concrete to improve concrete pavement performance.Combining with relevant data, a large number of theoretical analysis and laboratory tests, study the impact of different admixtures (fly ash, slag powder and powder polymers),mixing way(single-doped and doped compound) and different content on road properties of concrete, then reveal the improvement mechanism through the microscopic morphology of concrete point of view. According to the study on the mechanical properties of the concrete that single-doped and doped compound with different admixtures, the impact of different admixtures,mixing way and different content on the compressive strength, flexural strength and the ratio of compressive strength to flexural strength are analysised, then gives the optimum content range for different admixtures(single-doped and doped compound); According to the study on the durability of the concrete that single-doped and doped compound with different admixtures, the he impact of different admixtures,mixing way and different content on the abrasive resistance, permeability and frost resistance are analysised, and comparative analysis of the impact of different types of admixtures that under the optimum dosage on the mechanical properties and durability; At the same time, from the microscopic morphology of concrete point of view, figures out that the complex-doped polymer powder and slag powder can effectively enhance the mechanical properties and durability, and comprehensive mechanical properties and durability test analysis, determined the best combination of admixture and the optimum content.