Page 14 - New Trends in Eco efficient and Recycled Concrete

Contents xiii

14.5 The microstructure of paste/recycled aggregate interfacial
transition zone 442
14.6 Conclusion 443
References 444

15 Meso-structural modelling in recycled aggregate concrete 453
C. Medina, J. Sa ´nchez, I.F. Sa ´ez del Bosque, M. Frı ´ as
and M.I. Sa ´nchez de Rojas
15.1 Introduction 453
15.2 Interfacial transition zone in conventional and recycled concrete 454
15.3 Meso-structural modelling 457
15.3.1 Phases in concrete meso-structural modelling 457
15.3.2 Prior meso-structural modelling 459
15.3.3 Model proposed to study the meso-structure of concrete
bearing recycled ceramic aggregate 466
15.4 Conclusions 471
Acknowledgements 472
References 472
16 Sequestration of carbon dioxide by RCAs and enhancement
of properties of RAC by accelerated carbonation 477
Dongxing Xuan and Chi Sin Poon
16.1 Introduction 477
16.2 Estimation of CO 2 sequestration by RCAs 479
16.2.1 Materials and experimental 479
16.2.2 Influence of various carbonation factors on CO 2
uptake of RCAs 482
16.3 Performance of RAC with carbonated RCAs 485
16.3.1 Properties of NRCAs by accelerated carbonation 485
16.3.2 Static compressive strength 487
16.3.3 Dynamic compressive strength 488
16.3.4 Flexural strength 489
16.3.5 Microhardness of ITZ of RAC with C-NRCAs 489
16.3.6 Durability 491
16.3.7 Performance improvement of RAC prepared
with C-NRCAs 494
16.4 Conclusion and recommendations 495
Acknowledgement 495
References 496

17 Sulphur content of recycled aggregates applied in concrete
production 499
Carlos Thomas, Ana Cimentada, Jokin Rico and Jesu ´s Setie ´n
17.1 Introduction 499
17.2 Methods of identification of sulphur in recycled aggregates 500