详情

Field Monitoring of Wicking Geotextile for Moisture Reduction in Pavements

项目名称：	Field Monitoring of Wicking Geotextile for Moisture Reduction in Pavements
摘要：	Water is often detrimental to performance of pavements since it reduces soil strength and modulus and provides sources for erosion and freeze-thaw of base courses and subgrade. Removal of water from pavements can improve the performance of pavements and make them last longer. A common approach to remove water within pavements is to provide a drainage system, which is effective only when the soil beneath the pavement is saturated and water drains out under hydraulic gradient. However, a majority of pavement soils and aggregate base beneath pavements are mostly unsaturated during their service life. Therefore, the conventional drainage method is not effective in removing moisture in pavements. A newly developed geosynthetic product (also called a wicking geotextile) has been recently introduced into practice. It has been used in Alaska, Wisconsin, and Missouri to effectively solve freeze-thaw problems in subgrade soils and aggregate bases beneath the pavement structure. The research team at the University of Kansas has conducted a series of laboratory tests to evaluate the effectiveness of the wicking geotextile fabric to reduce moisture in Kansas aggregate bases (Guo et al., 2017; Wang et al., 2017). The test results verified the effectiveness of wicking geotextile in reducing moisture in aggregate bases. The aggregate bases with moisture reduction performed much better than those without moisture reduction in terms of base course deformation under cyclic plate loading. Before this product can be widely used in actual subgrade soil and aggregate base moisture reduction applications, a field trial with test sections is necessary to verify its field performance. KDOT has a plan to use this wicking geotextile in a project on US-169 in Allen County as a field trial, which includes two 1000-foot long test sections with a wicking geotextile with each section having different aggregate base type materials. There is a need for field monitoring of the wicking geotextile for moisture reduction in pavements. The purpose of this preproposal is to address this need. The field monitoring includes the installation and measurement of moisture and temperature sensors, sampling and dynamic cone penetration testing, and visual observation of pavement distresses for these two test sections during pavement service. The data collected will be used to evaluate the performance of wicking geotextile in moisture reduction in pavements.
状态：	Active
资金：	88,630
资助组织：	Kansas Department of Transportation
项目负责人：	Barrett, Ryan
执行机构：	University of Kansas, Lawrence
主要研究人员：	Parsons, Robert L
开始时间：	20180601
预计完成日期：	20210531
实际结束时间：	0