Research On Water-based Polymer-stabilized Gravel Base Materials And Typical Pavement Structure

SRX water-based polymer is a new type of road material made of a variety of high-strength anti-aging voltage sensitivity resin.It can be combined with gravel materials that meet a certain level of all levels of water-based polymer.After the material of this material is performed,it can take into account the overall strength and flexibility of the material,and avoid defects of reflected cracks and water damage to the road surface of the traditional semicircular grass-roots materials.First,in order to regulate the application of water-based polymer stable gravel materials in actual engineering,study the design method that conforms to the new type of flexible grassroots materials,that is,determine the design grade,health conditions,and best polymers of the stable gravel material of the water-based polymer Mixing is a necessary prerequisite.According to the characteristics of the intensity of stable gravel materials of the water-based polymer,refer to the appropriate grade formula with reference to the existing level of the grassroots level and its specifications,and screen the design grade with the maximum density conditions;The health conditions of the polymer stabilized gravel material and the water content of the health target;and finally determined the best mixing of the water-based polymer based on the law of the single-axis penetration intensity.The test results show that the SRX-19level(C-B-1)and the SRX-25 level(ATB-25)are relatively satisfied with the design requirements of the stable gravel material for the stabilization of the water-based polymer;The quantity is 0.5%,and the best polymer doping at the SRX-25 level is 0.6%.The corresponding unit doping increase rate and cost performance of the corresponding unit have reached the best value.Because the single-axis penetration strength can intuitively reflect the structure carrier of the stabilized gravel layer of the water base polymer under the load,this kind of water-based polymer stabilized gravel material composition design method is compared with the traditional grassroots material composition design method.It has certain effectiveness and strong practicality.Secondly,according to the best amount of water-based polymer-stabilized crushed stone material,the experimental analysis was carried out from four aspects: water stability,shrinkage characteristics,fatigue resistance characteristics and bearing capacity,and the results showed that water-based polymer stabilized crushed stone base layer,as a flexible base material,effectively avoided the problems of water damage,shrinkage cracking and other problems of traditional semi-rigid base materials,and had good fatigue resistance,which was one of the options for constructing long-life asphalt pavement structure.In addition,for the insufficient initial bearing capacity of the flexible base layer under some over and heavy duty traffic conditions,the initial bearing capacity of water-based polymer stabilized gravel materials can be effectively improved by adding low doses of cement.Thirdly,through the three axis test,the dynamic rebound mode of the stable gravel of the water-based polymer stabilized gravel was determined.The test showed that the stable gravel material of the water base polymer was stress-sensitive material.Reflects significant.The dynamic modulus of SRX-19 is 320 ～ 750 MPa,and the dynamic rebound mode of SRX-25 levels is 300 ～ 725 MPa.The relevant equation between the dynamic rebound mode and the penetrating strength parameters is established,which provides a reference basis for the estimated dynamic elastic modulus indicators in the pavement design application.Finally,follow the new version of asphalt pavement design specifications,and calculate the stable gravel of the water-based polymer of different traffic levels.And combined with the actual engineering design of Henan.