Semi-rigid Base Material Shrinkage Characteristic

In the highway construction of our country at present, the semi-rigid material is widely used for its high intensity, low cost, and being wide of the raw material source. It has been served as base course by the more and more one. If semi-rigid base course material shrinkages trains by the function of temperature contraction or aridity resistance exceed the ultimate tensile strain that the material what itself can bear, it will fracture, and influence the serviceability of the pavement. Choose suitable shrink test method carry on systematic research to semi-rigid base course shrink performance of material .have realistic meaning.According to the differences that the mixture structure of semi-rigid base course material, this text analyses the four kinds of types: homogeneous-dense structure, suspended-dense structure, skeleton-dense structure, and skeleton- interstitial structure; Through the contrast of shrinkage testing method having now , choose resistance strain-gauge testing method as the testing method of shrinking, and confirm the suitable experimental condition ; Separately in vibration molding method and quiet molding method to pigeonhole different kinds of mixture for the first time, further investigate and compare with mechanics performance and shrinkage performance under the same age issue, not warm to contract the change law of performance to do; Shrinkage anti-cracking coefficient through introducing, set up the contacting between the mechanics performance index and shrinkable performance index .