Cement News tagged under: cement strength
National regulator confiscates Rainbow Power Cement product10 October 2019, Published under Cement NewsSouth Africa’s National Regulator for Compulsory Specifications (NRCS) has confiscated thousands of Rainbow Power Cement bags and called for a nationwide recall after finding products non-compliant with compulsory cement specifications. "Rainbow Power Cement does not have the authority to manufacture and supply cement in South Africa as it had failed to meet minimum safety requirements in line with the NRCS Act. This has therefore led to withdrawal of the Letter of Authority as previously i... |
Secret of future cement strength lies in sea urchins?01 December 2017, Published under Cement NewsResearch carried out by the University of Konstanz, Germany, has helped to develop a cement that is resistant to fractures. The research highlighted that while the spines of sea urchins are made mainly of calcite, a very brittle and fragile material, the way nature optimises the “brick and mortar”-style architecture gives the spines additional strength. The guiding principle is to alternate hard (ie the brick) and soft (ie the mortar) layers as used by the sea urchin, When strength is ap... |
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