fib YMG | Recycled Aggregate Concrete: From Research to Practice | Nikola Tošić & ‪João Pacheco

https://www.fib-international.org/

0:00 Introduction | Andreas Sjaastad
1:12 The fib Young Members Group | Andreas Sjaastad
2:42 João Pacheco's bio | Andreas Sjaastad
3:30 Nikola Tošić's bio | Andreas Sjaastad
5:18 Announcements | João Pacheco
7:46 Why recycled aggregate concrete? | João Pacheco
11:11 Recycled aggregates | João Pacheco
15:05 Mix design | João Pacheco
21:41 Properties of recycled aggregate concrete | João Pacheco
24:56 Properties of recycled aggregate concrete | Nikola Tošić
50:38 Ultimate limit state design | João Pacheco
1:01:01 Deflections and cracking | Nikola Tošić
1:09:53 Guidelines for recycled aggregate concrete design | Nikola Tošić
1:15:13 Conclusions | Nikola Tošić
1:17:35 References | Nikola Tošić
1:18:25 Questions
1:18:48 About UN directive. 70% till 2020. What picture we have now in 2020?
1:21:22 What kind of RA we can/should use in concrete: concrete waste, ceramic, etc.? What about glass? And what about paints and other finishing agents from demolition waste? They could have some toxic agents.
1:22:39 What about the curing of such concrete construction? Are there any differences or additional action for curing after casting....and what about the vibration of concrete, the same way or some features?
1:24:03 What about the performance of RAC subjected to elevated temperatures?
1:25:33 Tensile crack smaller width (RAC vs NAC)...on limit states or on first steps? What about reinforcement anchoring length?
1:26:09 Is any research on the fusion of recycled aggregates with geopolymer concrete going on? Hope if the fusion is done, certain results will give more impressive results.
1:28:13 Asking you as a professional researcher in this field: on scale 1 to 10 where is people's knowledge about RAC for now?
1:29:22 Can you please elaborate on the usage of fibres along with recycled aggregate concrete?
1:31:06 Has anybody tried washed sea sand for concrete?
1:32:40 What about the addition of Flyash in the mixes consisting of recycled aggregate concrete?
1:33:50 When we forget the disadvantages, is the cost of a cubic meter lower or higher than traditional concrete?
1:35:55 Is there a standard classification of recycled aggregates? The quality may differ significantly and maybe the replacement percentage won't be the dominant factor.
1:36:54 Is there a term called "Shape factor" related to Recycled Aggregates?
1:37:46 Is there any difference between the alkali-silica reaction in NAC and RAC?
1:39:00 In what way does the impact resistance (crushing value) of recycled aggregates affect the compressive strength of concrete?
1:41:20 Does the size of the recycled aggregate affects their strength?
1:44:06 Outro | Ganterbrücke/Ganter Bridge (Switzerland)

A bridge between research and practice.

The fib, Fédération internationale du béton, is a not-for-profit association formed by 42 national member groups and approximately 1000 corporate and individual members. The fib’s mission is to develop at an international level the study of scientific and practical matters capable of advancing the technical, economic, aesthetic and environmental performance of concrete construction.

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The fib was formed in 1998 by the merger of the Euro-International Committee for Concrete (the CEB) and the International Federation for Pre-stressing (the FIP). These predecessor organizations existed independently since 1953 and 1952, respectively.

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