South Africa was no slouch in the construction game in the early 1970s
As a retired civil engineer, it was a pleasure to read Ian Macleod’s column “Termite teachings” about some direly needed productivity and environmental improvements in the construction industry.
I feel I have to add a couple of observations, though. First, to correct a common misconception of those not closely connected with construction that “cement” is just the stuff used to bind aggregates such as stone and sand, with the addition of a bit of water. The finished product is “concrete”. The second observation relates to Macleod’s point about using cement made from blast furnace slag. That kind of cement, called Slagment and made by the old South African Iron & Steel Corp , has been in use for more than 50 years.
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