A. Agassit
B. Albertus Magnus
C. Joseph Aspdin
D. Janseen
Explanation:
Cement as we know it was first developed by Joseph Aspdin, an enterprising 19th-century British stonemason, who heated a mix of ground limestone and clay in his kitchen stove, then pulverized the concoction into a fine powder. The result was the world’s first hydraulic cement: one that hardens when water is added.
