Cement News tagged under: Concrete strength

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Strength predictions

03 October 2018, Published under Cement News

A prediction of strength in concrete can be made through a range of methods and with numerous variables. To facilitate this, Arthur Harrisson examines the key factors that control strength development in concrete. Figure 1: cement 28-day strengths Various methods have been developed to predict the strength that a concrete may reach with a particular combination of cement, supplementary cementitious materials (SCMs), aggregate, admixture and even water. The variables are numerous...

Secret of future cement strength lies in sea urchins?

01 December 2017, Published under Cement News

Research 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...