The use of fiber reinforced plastic (FRP) composites for prestressed and non-prestressed concrete reinforcement has developed into a technology with serious and substantial claims for the advancement of construction materials and methods. Research and development is now occurring worldwide. The 20 papers in this volume make a further contribution in advancing knowledge and acceptance of FRP composites for concrete reinforcement. The articles are divided into three parts. Part I introduces FRP reinforcement for concrete structures and describes general material properties and manufacturing meth.

A considerable amount of concrete structures are currently or will soon be repaired or retrofitted with external reinforcement in the form of fiber reinforced plastic composites. It is important to characterize the bond and adhesion properties of FRP materials if they are externally applied to concrete. This paper presents an alternative simple shear test that can be used to determine the adhesion of FRP materials with concrete. The effects of environmental changes such as changes in temperature and humidity as well as the effects of other harsh conditions can easily be determined with this test. The adhesion of fiberglass composite laminates to concrete was tested with the proposed procedure. Two different materials for the matrix were used and the specimens were exposed to laboratory ambient conditions as well as high temperature, freezing/thawing, and cycles of saturation in sulfate solution.

The global response to COVID-19 has demonstrated the importance of vigilance and preparedness for infectious diseases, particularly influenza. There is a need for more effective influenza vaccines and modern manufacturing technologies that are adaptable and scalable to meet demand during a pandemic. The rapid development of COVID-19 vaccines has demonstrated what is possible with extensive data sharing, researchers who have the necessary resources and novel technologies to conduct and apply their research, rolling review by regulators, and public-private partnerships. As demonstrated throughout the response to COVID-19, the process of research and development of novel vaccines can be significantly optimized when stakeholders are provided with the resources and technologies needed to support their response. Vaccine Research and Development to Advance Pandemic and Seasonal Influenza Preparedness and Response focuses on how to leverage the knowledge gained from the COVID-19 pandemic to optimize vaccine research and development (R&D) to support the prevention and control of seasonal and pandemic influenza. The committee's findings address four dimensions of vaccine R&D: (1) basic and translational science, (2) clinical science, (3) manufacturing science, and (4) regulatory science.

This book is very useful in giving insight to the moisture related durability issues in bonding between Fiber Reinforced Polymer (FRP) and concrete. The experimental study is divided into two parts. The first part includes test mechanical properties of the resin and the concrete under the influence of water. In the second part, single lap shear bond test was conducted to compare the ultimate bond strength, failure modes, fracture energy, bond stress-slip curves with and without water immersion at different exposure periods. Finally, using the experimental results, a simple unified bond stress-slip relation was proposed ignoring the immersion duration and resin type which could address both non-immersion and immersion case. The proposed model showed good agreement with the experimentally observed local bond stress-slip relations for normal/high strength bond specimens with and without water effect.

Glass fiber reinforced polymer (GFRP) composite is applied widely in continuously reinforced concrete pavement (CRCP) because of its prominent advantages in properties and cost compared with conventional steel materials. This paper investigated influences of concrete strength, embedded depth, surface form, and diameter of bars on the GFRP-concrete bond performance by a series of pull-out tests. A finite element model was built to simulate the whole pull-out process. The test results showed that, within a certain range, rib depth has a positive effect on both slip control and stress improvement. Smaller rib spacing had a positive effect on controlling the slip displacement, but the diameter of bars and concrete strength had a negligible impact on both the bond strength and slip displacement. The developed finite element model (FEM) could provide similar results as the pull-out tests, and the model also demonstrated a distinct peak value in a shear stress cloud chart. Meanwhile, in order to analyze the effect of embedded depth on bond strength, a normal distribution model was utilized to fit the shear stress distribution. The analysis results retrieved from the normal distribution model, with an extreme small relative error less than 4 %, were more in line with the experimental results than the traditional average distribution model.