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Concrete with Fly Ash – Highest Quality for Durability Ever Achieved in Mozambique for a Bridge

Author(s): D. Swanepoel1, J. Seitz1 and B. Pengyu2
Paper category: Proceedings
Book title: Proceedings of the 71st RILEM Annual Week & ICACMS 2017,Chennai,India, 3rd -8th September 2017
Editor(s): Manu Santhanam
Ravindra Gettu
Radhakrishna G. Pillai
Sunitha K. Nayar
ISBN: 978-2-35158-196-4
ISBN: 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9:
Publisher: Published by RILEM Publications S.A.R.L.
Publication year: 2017
Pages: 248-257
Total Pages: 10
Language : English

Abstract: The longest suspension bridge of Africa is under construction in Maputo, Mozambique. The
bridge system for the crossing of the Maputo Bay consists of 3 different bridges: a northern
approach bridge as free cantilever bridge, the main one as a conventional suspension bridge
and the southern approach bridge with prefabricated post-tensioned T-beams of 30 m and 45
m in length. The concrete utilized is exceptionally sustainable as up to 40% of the cement is
substituted with Fly Ash (FA). This has resulted in above average 90/365 day strength gains
as well as extremely high durability results. The testing for the durability indices of the core
samples were performed at the University of Cape Town. The results were marked as being
the best site concrete ever tested in their laboratories. Another unique aspect of the concrete
has been the addition of a superplasticizer retarder that has kept the workability of the
concrete for the heavy foundations up to 16 hours, highly important for the quality assurance
of this and the large base slabs of the anchorage blocks. The bridge is being built by the
Chinese Contractor China Road & Bridge Corporation (CRBC) and the German GAUFF
Engineering is in charge of the quality control and supervision for the Government of

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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