Test Study on Dry Shrinkage Deformation Properties of Cement-stabilized Macadam Base Course Materials

It is extremely important to reduce dry shrinkage cracking of cement-stabilized macadam base course materials for prolonging service life of asphalt pavement with semi-rigid base.The current task is aiming at the default of cracking of cement-stabilized macadam base course under the condition of moisture changing in the south area of Suzhou,based on the current circumstances of cement-stabilized macadam base of expressway,combined with relative test research.Some of the influencing factors on dry shrinkage deformation properties of cement-stabilized macadam is analysed,The means of reducing dry shrinkage cracking of cement-stabilized macadam in terms of material composition are discussed.Result shows a series of factors have evidence effects on dry shrinkage deformation properties of cement-stabilized macadam base course materials,such as aggregate gradation composition,water loss ratio,exposure time,strength and porosity ratio etc.