| At present, Road construction become the focus of infrastructure, Asphalt is an important raw material Expressway in view of the poor performance of many domestic asphalt and Polymer Modifier of high prices Good items and low price is an eternal theme. Hence cost-effective modifier on the closely watched.In this paper, relying on science and technology projects in Chongqing City Board of Education, "Nano-Layered Silicate Research enhance road asphalt," nano-layered silicate Preparation of modified asphalt and the mechanism for research.This paper for nano-layered silicate modified asphalt preparation, The raw materials for research are Sichuan Renshou use bentonite, three intercalation agent, silane coupling agent,and 70# asphalt ,According to the basic characteristics of bentonite and physical and chemical properties using silane coupling agents and intercalation intercalation compound, a system of organic bentonite, the bentonite then joined asphalt organic system in the nano-layered silicate Salt modified asphalt, the research is for its Preparation and modification mechanism.In this paper, first of the fundamental characteristics of bentonite, and test the physical and chemical properties, suggested modification of sodium, sodium analysis of the mechanism of sodium research process, in the course of sodium in the study of temperature, time, volume, and pulp concentration on the effects of sodium. To the soil of sodium ion exchange capacity for the evaluation index, and know the optimal process parameters.Of sodium in the soil organic process, the study of temperature, volume, time of the organic effect. Ion exchange rate for the evaluation index, the optimal process parameters and process conditions better prepared with silane coupling agent intercalation compound organic bentonite, X-ray, infrared spectra qualitative analysis Intercalation results.Used in the organic system of asphalt modified bentonite, in the process of modification using orthogonal test of the temperature, time, the shear rate on the modified asphalt performance indicators influence in the process conditions better prepared to Asphalt, through the Experimental Analysis of the modified asphalt binder road performance, and under the same conditions and the system of SBS modified bitumen comparison. Finally,Asphalt modified from the component before and after the changes, compatibility, organic bentonite and asphalt dissolvability, imitate other polymer / Silicate Nanocomposites toughening mechanism to several aspects of the analysis of organic bentonite Asphalt modified mechanism. |
