Download Advanced Polymer Composites and Polymers in the Civil by L. C. Hollaway, P. R. Head PDF

By L. C. Hollaway, P. R. Head

Content material:
Foreword

, Page v
Preface

, Pages vii-viii
About the authors

, Pages ix-x
Chapter 1 - Introduction

, Pages 1-4
Chapter 2 - complicated polymer composite fabrics and their components

, Pages 7-35
Chapter three - Manufacture and houses of complicated polymer composites correct to civil engineering

, Pages 37-88
Chapter four - restrict country design

, Pages 89-106
Chapter five - FRP strengthening and service of bolstered concrete systems

, Pages 109-159
Chapter 6 - complex polymer composite reinforcement for concrete construction

, Pages 161-186
Chapter 7 - Geotechnical applications

, Pages 187-220
Chapter eight - functions in complicated polymer composite constructions

, Pages 221-286
Chapter nine - the longer term for the complicated polymer composite within the civil infrastructure

, Pages 287-292
Glossary

, Pages 293-299
Author index

, Pages 301-305
Subject index

, Pages 307-316

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Additional resources for Advanced Polymer Composites and Polymers in the Civil Infrastructure

Sample text

1. A diagrammatic representation of the pultrusion machine. Chapter 3. Manufacture and properties of advanced polymer composites relevant to civil engineering 43 die. 5 m by 275 mm thick are currently operating in the USA. The pultrusion technique has been used quite extensively in the construction industr>^ to form complete sections and units. 7 discusses flexural and shear plate bonding to increase the strength of structural units; the polymer composite plates for the upgrading of these units are manufactured by the pultrusion method.

It is possible to achieve a 55% glass resin ratio by weight using this system. Pressure bag. A pressure of about 3 atm is applied directly to the polymer membrane which is in contact with the composite. As the pressures are much greater than those applied in the vacuum bag method, glass resin ratios by weight can be increased to about 65% with a corresponding increase in mechanical properties. Autoclave. The autoclave process is a modification of the pressure bag method. A 6-atm pressure is developed in the autoclave, thus producing a high quality composite with a glass resin ratio by weight of up to 70%.

In this process dry fibres are preformed in a mould in the fabrication shop and are sent to site. The preform is then attached to the structure and a resin supply is channelled to the prepreg. The prepreg and resin supply is then enveloped in a vacuum bagging system. As the resin flows through the dry fibre preform it forms both the composite material and the adhesive bond between the CFRP and the structure. The process provides high fibre volume fraction composites of the order of 55% which have high strength and stiffness values.

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