Professional paper

Concrete mix design for reconstruction ofNorthwest breakwater in theTripoli Harbour – Libya

Ksenija Janković orcid.org/0000-0003-3744-3799 ; Institute IMS, Laboratory for concrete, Bul. vojvode Mišića 43, 11000 Belgrade, Serbia
Zoran Romakov ; Institute IMS, Laboratory for concrete, Bul. vojvode Mišića 43, 11000 Belgrade, Serbia
Dragan Bojović ; Institute IMS, Laboratory for concrete, Bul. vojvode Mišića 43, 11000 Belgrade, Serbia
Dragan B. Nikolić ; Institute IMS, Laboratory for concrete, Bul. vojvode Mišića 43, 11000 Belgrade, Serbia

Abstract

Reconstruction of Northwest breakwater in the Tripoli Harbour - Libya (about 4500 m long) required manufacture of various concrete elements (cubes and accropodes) in total amount of 550000 m3. Volumes of cubes were 6,3 m3, 8,5 m3and 12,7 m3, volumes of accropodes were 6,3 m3 and 9,0 m3. After preliminary trials and trial production, an optimum mix proportion was chosen, in compliance with technical specification requirements. One of the main causes for concrete blocks cracking is the temperature difference between core and external surface of the blocks, so new blocks with new mix proportions were made (three variations in cement content). Temperature was measured at three characteristic points: in the middle of the cube, in the middle of vertical outer surface and in the middle of horizontal upper edge. Finally, optimal proportions of the constituent materials were adopted.

Keywords

marine structure; mass concrete; temperature

Hrčak ID:

65939

URI

https://hrcak.srce.hr/65939

Publication date:

31.3.2011.

Article data in other languages: croatian

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