Unique Polymeric Fiber and Fiber Delivery Systems for the Economic Preparation of High-fiber Content Concrete with Superior Physical Properties

Unique Polymeric Fiber and Fiber Delivery Systems for the Economic Preparation of High-fiber Content Concrete with Superior Physical Properties
Author: Billy D. Neeley
Publisher:
Total Pages: 256
Release: 1998
Genre: Fiber-reinforced concrete
ISBN:

This report documents the results from an investigation of a new polymer fiber and unique delivery system for charging fibers into concrete mixtures. The straight Polyolefin fibers are available in two sizes: (1) 0.63 mm in diameter and 50 mm long, and (2) 0.38 mm in diameter and 25 mm long. Each of the two sizes of fibers is packaged in bundles approximately 50 mm in diameter. Each. bundle is encased with paper tape bound with a water-soluble glue. The fibers are charged into the concrete mixture in mass. Approximately 3 to 10 min of mixing time is necessary to uniformly distribute the fibers throughout the concrete mixture, depending upon the fiber content, consistency of the concrete mixture, and the type of mixer being used. Fresh and hardened properties were evaluated in mixtures containing up to 15 kg/cu m. The results indicate that concrete mixtures with the Polyolefin fibers can be produced having adequate workability and finishability if proportioned properly. Addition of the Polyolefin fibers does not significantly influence the compressive nor first-crack flexural strength, freezing-and-thawing resistance, drying shrinkage, nor the chloride permeability of concrete mixtures. However, the presence of the Polyolefin fibers does influence the post-crack behavior of concrete mixtures. Impact resistance and flexural toughness are improved as the fiber loading increases. A 6,100-m whitetopping demonstration project was constructed on a heavily traveled interstate in Mississippi. The whitetopping was 100 mm thick. Details of the specifications, construction, and early-time performance are given.

Composite Materials

Composite Materials
Author: It Meng Low
Publisher: Elsevier
Total Pages: 690
Release: 2021-06-18
Genre: Technology & Engineering
ISBN: 0128208791

Composite materials have been well developed to meet the challenges of high-performing material properties targeting engineering and structural applications. The ability of composite materials to absorb stresses and dissipate strain energy is vastly superior to that of other materials such as polymers and ceramics, and thus they offer engineers many mechanical, thermal, chemical and damage-tolerance advantages with limited drawbacks such as brittleness. Composite Materials: Manufacturing, Properties and Applications presents a comprehensive review of current status and future directions, latest technologies and innovative work, challenges and opportunities for composite materials. The chapters present latest advances and comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites. The book targets researchers in the field of advanced composite materials and ceramics, students of materials science and engineering at the postgraduate level, as well as material engineers and scientists working in industrial R& D sectors for composite material manufacturing. - Comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites - Features latest advances in terms of mechanical properties and other material parameters which are essential for designers and engineers in the composite and composite reinforcement manufacturing industry, as well as all those with an academic research interest in the subject - Offers a good platform for end users to refer to the latest technologies and topics fitting into specific applications and specific methods to tackle manufacturing or material processing issues in relation to different types of composite materials

Polymer Science and Engineering

Polymer Science and Engineering
Author: National Research Council
Publisher: National Academies Press
Total Pages: 193
Release: 1994-01-01
Genre: Technology & Engineering
ISBN: 0309049989

Polymers are used in everything from nylon stockings to commercial aircraft to artificial heart valves, and they have a key role in addressing international competitiveness and other national issues. Polymer Science and Engineering explores the universe of polymers, describing their properties and wide-ranging potential, and presents the state of the science, with a hard look at downward trends in research support. Leading experts offer findings, recommendations, and research directions. Lively vignettes provide snapshots of polymers in everyday applications. The volume includes an overview of the use of polymers in such fields as medicine and biotechnology, information and communication, housing and construction, energy and transportation, national defense, and environmental protection. The committee looks at the various classes of polymersâ€"plastics, fibers, composites, and other materials, as well as polymers used as membranes and coatingsâ€"and how their composition and specific methods of processing result in unparalleled usefulness. The reader can also learn the science behind the technology, including efforts to model polymer synthesis after nature's methods, and breakthroughs in characterizing polymer properties needed for twenty-first-century applications. This informative volume will be important to chemists, engineers, materials scientists, researchers, industrialists, and policymakers interested in the role of polymers, as well as to science and engineering educators and students.

Popular Science

Popular Science
Author:
Publisher:
Total Pages: 136
Release: 2005-09
Genre:
ISBN:

Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.

Advances in Bio-Based Fiber

Advances in Bio-Based Fiber
Author: Sanjay Mavinkere Rangappa
Publisher: Elsevier
Total Pages: 834
Release: 2021-12-06
Genre: Technology & Engineering
ISBN: 0128245433

Advances in Bio-Based Fibres: Moving Towards a Green Society describes many novel natural fibers, their specific synthesis and characterization methods, their environmental sustainability values, their compatibility with polymer composites, and a wide range of innovative commercial engineering applications. As bio-based fiber polymer composites possess excellent mechanical, electrical and thermal properties, along with highly sustainable properties, they are an important technology for manufacturers and materials scientists seeking to improve the sustainability of their industries. This cutting-edge book draws on the latest industry practice and academic research to provide advice on technologies with applications in industries, including packaging, automotive, aerospace, biomedical and structural engineering. Provides technical data on advanced material properties, including electrical and rheological Gives a comprehensive guide to appraising and applying this technology to improve sustainability, including lifecycle assessment and recyclability Includes advice on the latest modeling techniques for designing with these materials