Validating Field Employed X-Ray Fluorescence (XRF) on Stabilized Subgrade Projects to Assess Impact of Extreme Precipitation Events, Improve Construction Quality Control and Facilitate Geotechnical Forensic Investigations
| 项目名称： | Validating Field Employed X-Ray Fluorescence (XRF) on Stabilized Subgrade Projects to Assess Impact of Extreme Precipitation Events, Improve Construction Quality Control and Facilitate Geotechnical Forensic Investigations |
| 摘要： | Prior to pavement construction, extreme precipitation events can impact subgrade strength. Additionally, the amount and distribution of stabilizer in the subgrade soil can significantly impact the long-term behavior of the roadway. The desired amount of stabilizer is specified in the design phase, but currently, there is no reliable way to verify that field stabilization values are consistent with specified design values. There is also no standard process for determining how well the stabilizer is distributed, both spatially and throughout the required design depth. The goal of this research project is to validate the portable field employed X-Ray Fluorescence (PFXRF) test by assessing its detection accuracy on selected roadway stabilization projects. In addition, the PFXRF will be used to assess the depth and spatial heterogeneity of the stabilization across a site. At the end of the project, recommendations will be developed for transportation officials regarding how to employ PFXRF and how to implement a laboratory XRF testing protocol for job site quality control applications. X-Ray Fluorescence (XRF) can be utilized after extreme precipitation events, in which stabilizer leaching is suspected. It can also be used during forensic investigations, where the presence or lack of additive in a stabilized layer needs to be determined. |
| 状态： | Active |
| 资金： | 350648.00 |
| 资助组织： | Research and Innovative Technology Administration<==>University of Oklahoma, Norman<==>Oklahoma Department of Transportation |
| 执行机构： | University of Oklahoma, Norman |
| 开始时间： | 20141001 |
| 实际结束时间： | 20160930 |
| 主题领域： | Construction；Geotechnology；Highways；I30: Materials |
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