Polymer modified concrete (PMC) consists of Portland cement concrete with a polymer modifier. Its advantages are proper bonding strength to substrate concrete, high tensile and flexural strength and low amount of shrinkage and permeability. Using PMC overlays can be considered as a method for preservation of damaged concrete structures due to their suitable performance and durability. In this r...

Concrete overlays are a growing solution in the United States for pavement rehabilitation and preservation. Many different overlay types designs can be used based on existing conditions to achieve variety of design goals. Recent performance studies have indicated that concrete capable providing an extended service life 35 years or more. However, intended may shorter, some cases, experience earl...

Many small organizations lack the expertise and resources to conduct usability evaluations of their websites. Social Overlays, presented here, is a new system that allows a community of users to collectively improve their website. Social Overlays enables end–users to identify and repair common user interface problems through creating “overlays” on web pages as part of their regular use, thereby...

Self-repair is a key area of functionality in overlay networks, especially as overlays become increasingly widely deployed and relied upon. Today’s common practice is for each overlay to implement its own self-repair mechanism. However, apart from leading to duplication of effort, this practice inhibits choice and flexibility in selecting from among multiple self-repair mechanisms that make dif...

Pavement maintenance and repair is a crucial part of pavement management systems. Accurate reliable performance prediction the prerequisite for making reasonable decisions selecting suitable schemes. Rutting deformation, as one most common forms asphalt failures, key index evaluating performance. To ensure accuracy commonly used models, input parameters models need to be understood, coefficient...

Overlay networks are emerging as the technology of choice for deploying new large-scale distributed services and applications. Despite being such a key technology, overlays have no coherent strategy for failure recovery, employing a plethora of ad-hoc solutions. This thesis surveys the state-of-the-art in overlay network and fault-tolerance research, examining the shortcomings of present approa...

1 Strength, durability and health monitoring aspects of composite overlays on civil engineering structures are discussed. The perspective and benefits of the repair, upgrade, retrofit, and rehabilitation of US civil infrastructure using composite overlays is briefly reviewed. Bond strength, durability, and in-service health monitoring are identified as critical issues blocking the wide acceptan...

For rehabilitation of damaged concrete structures, the durability of repair overlay is a very important issue. Self-compacting concretes (SCC) are known as a suitable repair overlay materials. In this study, the durability of different self-compacting lightweight aggregate concretes (LWSCC) and effect of lightweight aggregate type on them is investigated. 3 mix designs of LWSCC containing three...

The construction, repair and rehabilitation of concrete pavements relies on the production and flow of large quantities of concrete and its constituents. Within the US, nearly 43 megatons of cement are used annually for the construction, repair and rehabilitation of concrete pavements, accounting for over 39 megatons of CO2 emissions. To reduce environmental impact and improve the sustainabilit...