Engineering Commons^™

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

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 …