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CONCRETE TECHNOLOGYwww.cpi-worldwide.com CPI %u2013 Concrete Plant International %u2013 1 | 2026 35lected deposits in east and southern Africa, compared with concrete mixes generally recommended for marine concrete structures in South Africa. The underlying aims were to create knowledge on the suitability of African clay resources for the production of LC3 concrete, and to aid industry in developing and manufacturing sustainable cementitious binders and concrete mixes. The mix designs considered two approaches i) replacing clinker by the optimal proportion of calcined kaolinite clay and LS, and ii) further reducing clinker/powder in the system by optimising the proportions of the constituent materials. Materials and mix compositionMaterialsFour kaolinite clay samples from South Africa (SA) and Tanzania (TZ) were investigated: Bronkhorstspruit (B-Clay) and Hopefield (H-Clay) in SA, Pugu (PH-Clay) in TZ, and Heidelberg Cement plant area (HC-Clay) in Dar es Salaam, TZ. The composition of the resulting cementitious binders was optimized based on mortar compressive strength and hydration characteristics, as detailed in [10].n Emmanuel Safari Leo is a lecturer at the University of Dar es Salaam, College of Engineering and Technology. He obtained his MSc (Eng.) and PhD from the University of Cape Town, South Africa and his BSc (Civil Eng.) degree from the University of Dar es Salaam, Tanzania. His research interest focuses on supplementary cementitious materials. leo.emanuel@udsm.ac.tzn Mark Alexander is Emeritus Professor of Civil Engineering, and a Senior Research Scholar in the University of Cape Town. He has a PhD from the University of the Witwatersrand, Johannesburg, and is a Fellow of the University of Cape Town, of RILEM, of the South African Institution of Civil Engineering, the South African Academy of Engineering, and the Indian Concrete Institute. He is a registered Professional Engineer in South Africa. His research interests are in concrete durability, service life prediction, concrete sustainability, and repair and rehabilitation of deteriorated concrete structures. mark.alexander@uct.ac.zan Hans Beushausen is Professor for structural engineering and materials in the Department of Civil Engineering at the University of Cape Town and Director of the Concrete Materials & Structural Integrity Research Unit. His research fields include concrete durability (material aspects, durability testing, design and specification), performance assessment and repair of concrete structures, and sustainable concrete technology (low carbon cementitious binders, recycled aggregates). He is an editor of the magazine Concrete Plant International, a member of fib and ACI, and Vice President of RILEM.hans.beushausen@uct.ac.za1 RECEPTION HOPPER4 HOPPERS OF 70 MC / EACH FOR A TOTAL OF 280 MC8 HOPPERS OF 35 MC / EACH FOR A TOTAL OF 280 MC1 LOADING SYSTEM WITH BUCKET ELEVATOR FOR HOPPERS3 CEMENT SILOS OF 80 TON EACH2 PLANETARY MIXERS MPR SERY HIGH PERFORMANCE 3000/2000 LTMIXER AUTOMATIC WASHING SYSTEM1 AGGREGATE MOBILE WEIGHING BUCKET2 CEMENT SCALES2 WATER SCALES2 ADMIXTURE SCALESCONTROL PANEL IN PROTECTION CABINCAMERAS VIDEO CONTROL1 DIRTY WATER DOSER1 DIRTY WATER TREATMENT SYSTEMAUTOCLAVE WATER SYSTEM WITH STORAGE TANKEXCELLENCEIN CONCRETE BATCHING PLANTSTAILOR MADE BATCHING PLANTSTURNKEY SOLUTIONSTOWER CONCRETE BATCHING PLANT TK TYPE FOR A HIGH PRODUCTION OF QUALITY CONCRETE FOR THE PRODUCTION OF PRECAST ELEMENTSCMYCMMYCY CMYKRocchi logo allargato.pdf 1 11/03/19 17:24