Who invented Portland cement and in which year?
A. William Aspdin, 1824
B. William Aspdin, 1840s
C. Joseph Aspdin, 1840s
D. Joseph Aspdin, 1824
Answer:B
Who invented Portland cement and in which year?
A. William Aspdin, 1824 B. William Aspdin, 1840s C. Joseph Aspdin, 1840s D. Joseph Aspdin, 1824
Explanation: Joseph Aspdinpatented Portland cement in 1824. William Aspdin, his son is regarded as inventor of modern Portland cement due to his developments in 1840s.