Preparation and performance of cementing materials for rapid maintenance of pavement potholes

Abstract

At present, China has entered the peak stage of large-scale

maintenance, but repair materials for asphalt pavement potholes

are subjected to problems, such as low construction efficiency and

poor durability. Polyurethane modified epoxy acrylic resin was se

lected in this study to repair pavement potholes rapidly and improve

durability further. Meanwhile, the cementing material and aggre

gate were formed into a mixture for rapid repair. A four-factor and

four-level orthogonal experiment was designed, and the optimal

mass ratio of each component of the cementing material (EPMY)

was determined according to three indexes: tensile strength, elon

gation at break, and viscosity. The basic properties of the material

were evaluated using viscosity, glass transition temperature, ther

mal stability, and elastic recovery rate tests. Finally, the mechani

cal properties of EPMY immersed in water, salt, acid, and oil so

lutions were tested under different environmental stimuli. Results

showed that the optimal mass ratio of epoxy resin binder is 100%

epoxy acrylic resin:15% diluent:30% toughening agent:60% curing

agent:6% accelerant, with a tensile strength of 21.48 MPa and an

elongation at break of 48.3% at −10 °C. Elastic recovery rate is

51.3% at room temperature, glass transition temperature is −13.6

°C, and mass residual rate of EPMY is 10.06% when the temperature

rises to 500 °C. The mechanical properties of EPMY are maximally

affected by the acidic solution; and the elongation at break, bending

strength, and bending deformation are reduced by 11.63%, 7.52%,

and 9.58%, respectively. Moreover, and the elongation at break of

EPMY can be maintained above 89%. The cementing material can

be used for the rapid repair of pavement potholes, thereby incre

asing the convenience of maintenance work and improving the

maintenance level.