While the mixing process is the same for fire clay mortar or refractory mortar, the portions of its materials will vary depending on the type of cement used. The mix for refractory or fire clay mortar is different from typical mortar to compensate for its exposure to high temperatures. Refractory mortar should also not be exposed on the inside part of an oven to minimize its shrinkage.
Largo is the third largest city in Pinellas County, Florida, USA and is part of the Tampa Bay Area. Centrally located, it is the crossroads of the county. As of the 2000 census, the City had a total population of 69,371. As of 2004, the population recorded by the U.S. Census Bureau was 71,704. Largo was first incorporated in 1905. In 1913, it became the first municipality in Pinellas County to adopt a Council-Manager government.
The original county seat was Trinidad, on the county's southwestern coast. In 1854 the county seat was moved to Crescent City, because of its larger population. But the western portion of the county was unrepresentative of the mining interests in the eastern portion of the county, and so, in 1856, the county seat was moved inland, to Orleans Bar, now Orleans. In 1857, Del Norte County, including Crescent City, was split off from Klamath County. The county's economy was never healthy after the gold rush. The area was contested with native American tribes in the 1855 Klamath and Salmon River Indian War and the 1858-1864 Bald Hills War.