Laboratory Testing of High Performance Repair Materials for Pavements and Bridge Decks


Book Description

Because of numerous freezing and thawing cycles happening during the year in the state of Ohio, pavement partial-depth patching has become a common maintenance activity in this state. The Ohio Department of Transportation (ODOT) has a need for durable, more permanent high performing pavement and bridge deck materials that allow for a faster repair and for user safety. However, new or proprietary products are difficult to specify unless incorporated into a construction project for research purposes or procurement of the product complies with the ODOT's direct purchasing requirements.This research project was conducted in three main phases, literature review and selecting the proper materials, field patching and inspection of the materials, and laboratory testing of the materials to compare the results to the field inspections. All these phases were conducted in order to specify for use in future ODOT construction, based on the field and laboratory performances of the products. As the last phase of this research project, this thesis investigates the properties and performance of the selected products used for partial-depth repair of concrete pavement in a laboratory. The materials were tested for freeze-thaw, modulus of elasticity, strength, shrinkage, ultrasonic pulse velocity, mass change, and scaling damage to quantify their characteristics relative to those products known to work well. The objective of this study was to document the investigation of the lab testing of selected repair materials for partial-depth repair. The investigation determined the acceptable laboratory tests for comparative analysis of existing repair materials. Eventually, the investigated materials were ranked based on their overall performance considering economic aspect and their laboratory and field performances.




Evaluation of High Performance Pavement and Bridge Deck Wearing Surface Repair Materials


Book Description

This project provided for a laboratory and field testing of several high performance repair materials for pavements and concrete bridge decks. The main purpose was to provide ODOT with materials and procedures to shorten road and bridge closures. The project was relatively complex with several phases. First, the repair materials for testing and the locations needed to be selected. This required a thorough review of the available literature, including the practices used by other state transportation agencies. Next, the repair materials were installed on pavements and bridge decks on three separate installation projects in ODOT District 8, two by the Great Lakes Construction Company (TGLCC), and two with ODOT maintenance crews. There was a cold weather installation on bridge decks and concrete pavements in March 2014, with two products rated for low temperatures, followed by a larger installation on concrete pavement with four other products in June 2014. The first two installations were carried out by TGLCC. These installations were monitored for two years from the first installation. In June 2015, five bridge deck patches with two materials were installed by the ODOT maintenance crews. In addition, a parallel laboratory testing program of the selected materials was carried out to evaluate performance and engineering properties. Finally, the specification recommendations were developed based on the literature review and project results. The phases of the project are documented in five separate graduate theses published at Cleveland State University




Selection of High Performance Repair Materials for Pavements and Bridge Decks


Book Description

Abstract: The Ohio Department of Transportation has identified the need to specify durable, more permanent high performing pavement and bridge deck patching materials. These materials need to allow for expedited pavement and bridge deck wearing surface repair for worker and user safety. Currently, either temporary or generally specified in-kind or like materials are being used to perform pavement patching. Usually, the Department provides generically specified cementitious or cold mix asphalt materials for patching wearing surfaces with varied performance characteristics. Current products used for these repairs are generally those that have been used for many decades for which competition exists. However, new or proprietary products are difficult to specify unless incorporated into a construction project for research purposes, an approved equal is permitted, or procurement of the product complies with the Department's direct purchasing requirements. Consequently, this creates a situation where the desired product is precluded from use. The objective of this study was to specify durable, more permanent high performing pavement and bridge deck patching products that allow for expediting pavement and bridge deck wearing surface repair for worker and user safety. Aspects examined in this study include: history on causes of pavement patching failures, comparison of laboratory and field testing criteria from other organizations, product classifications based on material properties, analysis of available patching products, and identifying products to be tested based on previous research. The products chosen for the winter patching project were FlexSet and MG Krete. They have been placed in the field already and were chosen due to their excellent low temperature range, compliance of most ODOT and ASTM 928 laboratory standards and great previous field testing results from ERDC and NTPEP. The other four products recommended for summer placement are Delpatch, RepCon 928, SR-2000 and Optimix. They displayed characteristics desirable for further testing and represent a range of material classifications. Recommended laboratory standards were specified based on current ODOT requirements and past research and are listed in this thesis. Field recommendations consisted of having the product representative present on site during placement and to document all conditions of the patch hole, surrounding pavement and weather conditions.










Advances in Materials and Pavement Prediction


Book Description

Advances in Materials and Pavement Performance Prediction contains the papers presented at the International Conference on Advances in Materials and Pavement Performance Prediction (AM3P, Doha, Qatar, 16- 18 April 2018). There has been an increasing emphasis internationally in the design and construction of sustainable pavement systems. Advances in Materials and Pavement Prediction reflects this development highlighting various approaches to predict pavement performance. The contributions discuss links and interactions between material characterization methods, empirical predictions, mechanistic modeling, and statistically-sound calibration and validation methods. There is also emphasis on comparisons between modeling results and observed performance. The topics of the book include (but are not limited to): • Experimental laboratory material characterization • Field measurements and in situ material characterization • Constitutive modeling and simulation • Innovative pavement materials and interface systems • Non-destructive measurement techniques • Surface characterization, tire-surface interaction, pavement noise • Pavement rehabilitation • Case studies Advances in Materials and Pavement Performance Prediction will be of interest to academics and engineers involved in pavement engineering.













Field Trials of Rapid-Setting Repair Materials


Book Description

The primary objective of the present study was to identify the critical properties (based on the laboratory tests) that could be correlated to the field performance of the rapid setting repair materials.The first phase of the project involved laboratory evaluation of six commercial rapid-setting repair materials (RMs). When tested in the laboratory, all but two exhibited acceptable rates of strength gain and three displayed relatively poor freeze-thaw resistance. All the RMs exhibited acceptable values for free-shrinkage, high resistance to cracking and good bond to substrate concrete. The resistance to chloride ion penetration of one of the RMs was very poor.The second phase of the project involved field installation and performance evaluation of the RMs. It was seen that while, in most cases, the controlled laboratory conditions yielded consistent mixes and acceptable performance, the properties of mixes produced on site were more variable. This was the result of somewhat uncontrolled changes in the amount of aggregate extension used, moisture content of the aggregates, amount water added and ambient temperature conditions. Follow-up inspection of the repair patches indicated that all the patches except one underwent premature failures (primarily cracking and edge de-bonding). The ambient temperature during the repairs was around 10°C. This led to an extended set-time for all the materials. The 12-hr compressive strengths values of the specimens from the field-mixes were occasionally lower than the 4-hr compressive strength values of laboratory mixes. Since the repairs were open to traffic after approximately 4 hours after placement, the low early age strengths could be a potential reason for premature failures of some of the patches.In general, several materials were found to be very sensitive to excess water added during mixing, resulting in a significant impact on the durability properties - especially the freeze-thaw resistance. In the field, for most of the materials, the consistency of the mixes varied across batches - this can be attributed to the variations in the aggregate extension adopted, mix-water added and the moisture content of the aggregates used. Construction-related issues (consolidation and finishing) also played an important role in the performance of the repair patches.