Cement is a hydraulic binder and the basic ingredient of concretes and mortars. It acts as a kind of glue to stick sand and gravel together.
Used by the Egyptians and then the Romans, it was rediscovered in the early 19th century. Cement has evolved over the decades. With Lafarge, it has become a technological product
Becoming more sustainable is a commitment of Lafarge in all of its operations.
In the beginning
Around the 1st century, the Romans perfected this "binder". On adding volcanic soil from the region of Pozzuoli, near Naples, they discovered that they could get this mixture to "set" underwater.
We now know that the soil from Pozzuoli - which lends its name to pozzolan - is 60 to 90% clay and 10 to 40% lime, depending on the source. Archaeological vestiges from that time, such as cement drains, have been discovered in several Roman cities.
In 1817, the young engineer Louis Vicat was working on the hydraulic properties of a "lime-volcanic ash" mixture.
Louis Vicat was the first to determine in a precise, controlled and reproducible manner the proportions of limestone and silica needed to obtain a mixture which, after burning at a specific temperature and after grinding, produced a hydraulic binder for industrial applications. In other words, cement.
However, he published the results of his research without filing for a patent...
The 19th century: industrialization
The first cement plant in France was built in 1846 at Boulogne‑ sur‑Mer. In 1868, Lafarge began producing cement at Teil, in the Ardèche.
The use of cement soared with the advent of new, faster processes for cement manufacture.
20th century: innovations signed Lafarge
Lafarge was responsible for two important discoveries that marked the early 20th century:
Today, Lafarge research and development continues to focus on innovation and works to continually improve the properties of cement.
Holborough Works (Credits:Lafarge Cement)
Hydraulicity is the extent to which a material hardens in the presence of water.
Burham Works, Kent (Credits: Lafarge
William Aspdin (Credits: Lafarge Cement )