。主要从事道路施工、路基稳定性和路面结构及路面材料的研究。在沥青混合料配合比设计理论等方面建立了若干原创性物理型公式。主持和参与了山东省自然科学基金、国家基金、山东省交通厅科技攻关等课题15项。获山东省科学技术进步三等奖、山东省交通厅科技进步奖和山东省教育厅科学技术进步奖共5项。在国际期刊、国际学术会议及国内核心期刊发表学术论文37篇，其中被SCI、EI检索15篇。获得过“土建与水利学院师德标兵”、“山东大学优秀班主任”及“山东大学教学能手”等荣誉称号。担任《Construction and Building Materials》、《International Journal of Pavement Research and technology》及国内若干EI核心期刊等五种国内外学术期刊的审稿人。编著、参编专著2部。
其他信息近期代表性科研论文（第一作者）：
Liu, Shutang; Cao, Weidong; Shang, Shujie; Qi, Hui; Fang, Jianguo. Analysis and application of relationships between low-temperature rheological performance parameters of asphalt binders.Construction and Building Materials, v 24, n 4, April 2010.（SCI、EI indexed）Shutang Liu,Changshun Shaob,Weidong Caoc,and,Xiao Liu . A new formula of Voids in the mineral aggregate (VMA) of Hot Mix Asphalt (HMA) and its application. Advanced Materials Research Vols. 150-151 (2011) pp 1158-1162.（EI indexed） Liu, Shutang; Ma, Cheng; Cao, Weidong; Fang, Jianguo.Influence of aluminate coupling agent on low-temperature rheological performance of asphalt mastic.Construction and Building Materials, v 24, n 5, p 650-659, May 2010. （SCI、EI indexed） Liu, Shutang; Cao, Weidong; Fang, Jianguo; Shang, Shujie.Variance analysis and performance evaluation of different crumb rubber modified (CRM) asphaltConstruction and Building Materials, v 23, n 7, July 2009. （SCI、EI indexed）Liu, Shu-Tang,Hou, Feng; Cao, WeiDong; Liu, Ying. Study on low-temperature cracking performance of asphalt mortar modified by an aluminate coupling agent. Journal of Testing and Evaluation, v 37, n 5, September 2009.（SCI、EI indexed） Shu-Tang Liu, Wei-Dong Cao. Experimental Study on Soil Stabilized with Firming Agent and Lime. Road Pavement Material Characterization and Rehabilitation. Published by Amaerican Society of Civil Engineers (ASCE. August 3-6, 2009 Changsha,Hunan,China. （EI indexed）Shutang Liu, Weidong Cao, Yingyong Li, Yongshun Yang. An analysis of slope stability of sand embankment with shear strength reduction (SSR) method. Advanced Materials Research Vols. Volumes 152 - 153)(2011) pp 1017-1023（EI indexed）Shutang Liu, Na Zhang, Weidong Cao,Yingyong Li. Establishment of direct shear strength model of river sand and its application in high embankment of sand. International conference on electric technology and civil engineering. April 22-24, 2011.（EI indexed）刘树堂；毛洪录；高雪池；商庆森。固化剂与低剂量石灰稳定土的应用研究。建筑材料学报，（EI indexed）刘树堂；杨永顺；房建果；郭忠印.布敦岩沥青改性沥青混合料试验研究。同济大学学报（自然科学版）, 2007.03.（SCI、EI indexed）刘树堂，商庆森. 郭忠印. 沥青混合料目标配合比设计的最佳沥青含量范围估算。公路交通科技2006 02. 刘树堂。张浩。类似级配沥青混合料的最佳油石比关系研究. 山东大学学报（工学版）.2006.11. 刘树堂。郭忠印. 一种判断SMA嵌挤状态的简便方法公路2005.11.
