Research On Application Of SMA

SMA has received much attention recently by Internationally and nationally as a promising solution to high grade highways, mainly due to the fact that it has excellent capability of anti-slide and anti-track . This paper is based on our comprehensive testing experience (indoor and outdoor) combined with testing result of the real construction work which took places in both our country and other countries in order to explain the SMA , I propose practical solutions that addresses the following issues: (a) the ingredients of SMA's feature, (b)requirement of the materials and their ratios. The paper proceeds as follows. Chapter one presents the introduction. I summarize the development of SMA in recent years and highlight the research problems related to and their signifances in chapter 2. I introduce the characteristic of SMA' s compose in chapter 3;I discuss the mechanism of SMA in Chapter 4; Chapter 5 focuses on the requirement imposed on the ingredients of SMA, such as asphaltum combined material,, thick or thin material and fibre stabilization material ; New theory to guide the design of ratio of SMA ingredients are proposed In Chapter 5; I brings forward the combined material design of ratio of SMA in Chapter 6; In Chapter 7 I sum up the essential points of the paper and explains the problems happened during experiment to expect more improvement.