Today in History- October 21, 1824 - Portland cement is patented by Joseph Aspdin, a stone mason in Yorkshire, England (UK patent No. 5022). He made it by burning finely pulverized lime and clay at high temperatures in kilns and grinding the mixture into a powder. This hydraulic cement would then harden with the addition of water. The result was a manufactured counterpart to ancient (27 BC) Roman cement made from lime and volcanic ash. He named his invention “Portland cement” as it resembled the high quality building stone quarried on the Isle of Portland off the British coast.
See the Engineering Pathway’s educational resources on Portland cement and concrete or visit the Civil Engineering Education, Construction Engineering Education or the Architectural Engineering Education community sites.