Construction World September 2024

READYMIX

Graham Dean, CHRYSO Business Development Director - Eastern Africa.

With the construction sector in East Africa seeing an upswing, CHRYSO East Africa has grown its offerings to the market while ensuring its admixture solutions are targeted at local conditions. Growing role for CHRYSO admixtures in EAST AFRICA’S CONSTRUCTION BOOM

A ccording to Graham Dean, CHRYSO’s Business Development Director Eastern Africa, the region’s growing investment in construction projects is evident in countries like Kenya, Tanzania and Uganda. While infrastructure development such as roads and railways are mainly driving this growth in Kenya, it is Tanzania’s mining industry and Uganda’s oil sector which are becoming more significant. “As a key construction product, concrete uses natural materials which are locally sourced,” says Dean. “This might include cement produced from limestone quarried around Nairobi, pozzolana to modify different cement types or quarried aggregates and crushed sands. To achieve the best results in concrete, it is important to understand the variations in what Mother Nature provides to us as raw materials.” He highlights that concrete admixtures which have been well proven with materials in South Africa, for instance, may not necessarily perform to the same levels with concrete materials from Kenya. Accommodating these variations has required considerable investment in research and technical facilities in East Africa, to ensure customised admixture solutions. “To resolve the performance differences between regions, CHRYSO set up a concrete laboratory in Nairobi where we can modify existing formulations,” he explains. “This allows us to

design bespoke admixtures for customers, based on their specific requirements and the local materials going into their concrete.” With its Nairobi office established almost 10 years ago, CHRYSO has developed the locally based experience and infrastructure to become a trusted partner in the concrete space. The company supplies its admixture solutions not only to large construction companies, specifiers and developers, but also to readymix plants, manufacturers of precast products and specialist applicators of decorative concrete. As the negative environmental impact of sand mining falls under the spotlight in certain East African countries, CHRYSO is also contributing to more responsible practices in the concrete segment. “The uncontrolled mining of river sand for concrete in many areas has led to concerns at government level, and an expectation that this practice might be banned in future to prevent further damage to the natural environment,” says Dean. “We have promoted our Quad range to raise awareness in the construction industry about alternatives to river sand.” CHRYSO uses its in-house polymers in the Quad range of products to accommodate the use of challenging sands, including too little or too much fines, swelling clays or irregular shapes. Being able to use lower quality sands can drive down procurement

30 CONSTRUCTION WORLD SEPTEMBER 2024