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Full-Text Articles in Engineering
A Novel Concrete-Based Sensor For Detection Of Ice And Water On Roads And Bridges, Habib Tabatabai, Mohammed Aljuboori
A Novel Concrete-Based Sensor For Detection Of Ice And Water On Roads And Bridges, Habib Tabatabai, Mohammed Aljuboori
Civil and Environmental Engineering Faculty Articles
Hundreds of people are killed or injured annually in the United States in accidents related to ice formation on roadways and bridge decks. In this paper, a novel embedded sensor system is proposed for the detection of black ice as well as wet, dry and frozen pavement conditions on roads, runways, and bridges. The proposed sensor works by detecting changes in electrical resistance between two sets of stainless steel poles embedded in the concrete sensor to assess surface and near-surface conditions. A preliminary decision algorithm is developed that utilizes sensor outputs indicating resistance changes and surface temperature. The sensor consists …
Evaluation Of Durability Of Existing Base Aggregates In Wisconsin Pavements, Mahmoud Akram Dakwar
Evaluation Of Durability Of Existing Base Aggregates In Wisconsin Pavements, Mahmoud Akram Dakwar
Theses and Dissertations
ABSTRACT
EVALUATION OF DURABILITY OF EXISTING BASE AGGREGATES IN WISCONSIN PAVEMENTS
by
Mahmoud Dakwar
The University of Wisconsin-Milwaukee, 2017
Under the Supervision of Professor Hani Titi
Highways are an integral part of modern societies, and high volumes of traffic are serviced by highways every hour of the day year-round. The base-course aggregate layer acts as the foundation of the pavement system, and it supports the overlaying layers in the pavement structure. The objective of this research study was to evaluate the durability of existing base-course aggregates as they are impacted by external factors. Samples from fourteen sites were collected and …
Assessments Of Concrete Internal Damage Caused By Freeze-Thaw Cycles And Mechanical Loading, Zeqian Li
Assessments Of Concrete Internal Damage Caused By Freeze-Thaw Cycles And Mechanical Loading, Zeqian Li
Theses and Dissertations
Concrete in bridge decks in Northern States, such as Wisconsin, is subjected to both freeze-thaw cycles and mechanical stresses. Standard testing methods are available to evaluate the deterioration of concrete, including ASTM C215 (Dynamic Modulus test), ASTM C1202 (Rapid Chloride Ion Penetrability test), and ASTM WK37880 (ESR test) are available. In addition, ASTM C642 (water absorption test) helps quantification of permeable voids in concrete. These tests have been used to evaluate undamaged concrete or concrete samples after freeze-thaw cycles.
The concrete samples in this study have been subjected to compressive stresses (0.4f_c^') and freeze-thaw cycles (100 to 300 cycles) to …