Cement And How It Makes Modern Life Feasible

Concrete use has been around for thousands of years, literally. There are records of concrete floors, housing structures, and underground cisterns that were produced in 6500 BC in the United Arab Emirates. From 3000 BC - 1500 AD, mortars of gypsum and lime were used in the pyramids and the Great Wall of China whilst, by 200 BC, the Romans were using concrete in the majority of their construction by 200 BC. Unlike the purported 400,000 labourers and hundreds of years needed for the Great Wall, modern technology delivers this [...]