Page 6 - New Trends in Eco efficient and Recycled Concrete

Contents

List of Contributors xvii
Foreword xxi

1 Construction and demolition waste 1
Jorge de Brito, Francisco Agrela and Rui Vasco Silva
1.1 Introduction 1
1.2 Processing of construction and demolition waste 2
1.2.1 Treatment processes for construction and demolition waste 3
1.2.2 Main types of recycled aggregates from construction and
demolition waste 4
1.3 Influence of recycled aggregates on the fresh-state performance
of concrete 5
1.4 Influence of recycled aggregates on the mechanical performance
of concrete 7
1.5 Influence of recycled aggregates on the durability performance
of concrete 10
1.6 Influence of recycled aggregates on the time-dependent
deformation of concrete 12
1.7 Concluding remarks 14
References 15

2 Biomass fly ash and biomass bottom ash 23
Francisco Agrela, Manuel Cabrera, Marı ´ a Martı ´ n Morales,
Montserrat Zamorano and Mazen Alshaaer
2.1 Energy from biomass, and biomass ashes (BA) 23
2.1.1 Biomass to produce energy, a renewable alternative 23
2.1.2 Sources of biomass for power generation 25
2.1.3 Advantages and disadvantages of biomass energy 27
2.1.4 Technologies for converting biomass into useful energy 28
2.1.5 Ash production from biomass combustion 29
2.1.6 Environmental and health aspects of biomass ashes 30
2.2 Overview of biomass ash characteristics 32
2.2.1 Classification of biomass ashes 32
2.2.2 Chemical composition of BA 34
2.2.3 Physical and microstructural properties of BA 35
2.2.4 Leaching characteristics of BA 37
2.2.5 Processing and improvement techniques of BA 40