Volcano Ash in Cement.

Progress, Volume VII, Issue 2, 1 December 1911, Page 898

Volcano Ash in Cement.

For some time past a company in Japan has been engaged in exploiting the use of volcano ash in combination with Portland cement mortar. This combination is said to be particularly valuable in the construction of works submerged in salt water. It is claimed that the cement thus formed possesses greater tensile strength, and is denser, than ordinary Portland cement. It is also more resistant to the percolation of water;