Cement is the single biggest industrial product Nigeria consumes. The country produces about 60 million tonnes a year (Dangote Cement, BUA, Lafarge Africa) and imports almost nothing — a rare manufacturing self-sufficiency. The plants, however, are built almost entirely on imported FLSmidth (Denmark), KHD (Germany), or Sinoma (China) process technology, using Portland clinker formulations developed for European limestones.
The Nigerian university work — published continuously in *Cement and Concrete Research*, *Construction and Building Materials* and the *Nigerian Journal of Construction Technology and Management* — characterises Nigerian limestones (especially the Sokoto, Mfamosing, Obajana and Ewekoro deposits), and the pozzolanic activity of rice-husk ash, corn-cob ash, palm-kernel-shell ash, and the volcanic ashes of the Biu Plateau and Mambilla.
The science is straightforward: 20–30% substitution of clinker with these locally available pozzolanic materials reduces cement cost and embodied carbon while maintaining 28-day compressive strength within Portland specifications. The plants do not do it because their kilns, formulations, and quality-assurance protocols are set by the European licensors and the Nigerian Industrial Standard (NIS 444) follows the European EN 197-1 standard.
It is the catalogue's clearest example of the fourth failure mode set out in the Niprisan deepdive: an import regime — including the imported standard itself — that treats Nigerian equivalents as suspect by default.