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Experiences in the application of SCC in hot environments

Readymix concrete production and quality control


This paper reports the use of self-consolidating concrete in the construction of the $US 1.2 billion Al-Jamaraat Bridge. The pedestrian bridge located in Mina, near Makkah in Saudi Arabia is used by Muslims in the annual Hajj rituals. A four-level segmental bridge with underground tunnels, access ramps, service buildings and helipad towers was recently constructed and completed. In total, more than 400,000 m3 (520,000 cubic yards) of 60- and 80-MPa self-consolidating concrete (SCC) along with 80-MPa steel fiber-reinforced SCC have been used in the edge beams, columns and retaining walls, and in stitching precast segmental bridge elements. SCC helped solving reinforcement and duct congestion problems, enhancing finish-ability and accelerating the construction schedule. This large-scale experience with SCC is des- cribed in this article and relevant aspects of the substantial database developed on SCC in this project are discussed.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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