DIVISION 3: Concrete Flashcards
It is one of the oldest manufactured building materials used as a mortar and plaster by early civilization
Lime
It is a technique of mural painting executed upon freshly laid or wet lime plaster, used by painters like Michaelangelo and Raphael in the Renaissance.
Fresco
It is the process of mixing quicklime with water during which water is absorbed and heat is energetically evolved, driving off much of the excess water in the form of steam.
SLAKING OR HYDRATION
Hydrated limes are marked in __lbs bags, also quicklime is sold in __ lb, multi-walled bags, steel drums and in bulk
50 and 80
It is a type of lime that sets under water, also in a dry form and treated similarly to hydrated lime.
HYDRAULIC LIME
It is used as a plaster by the Egyptians, greek and romans. Ofter used interchangeably with plaster in terminology.
GYPSUM
It is the densest and hardest gypsum that can be applied by a trowel. It’s also used with lime putty to slow the set.
KEENE’S CEMENT
This also added for greater cohesiveness, may be hemp, sisal or jute.
FIBER OR HAIR
It is commonly use as wall sheathing for Drywall partitions and as ceiling boards
GYPSUM BOARD
They were the first people to develop cement by mixing slaked lime with pozzolana which hardened under water.
Romans
Who rediscovered hydraulic cement in 1756?
John Smeaton
Who is the English bricklayer and mason that invented and patented Portland cement in 1824?
Joseph Aspdin
It is obtained by finely pulverizing clinker produced by calcining to incipient fusion an intimate and proportioned mixture of silica, alumina, lime and small amounts of other ingredients.
Portland cement
Portland cement is packed and solid in bags. Each bag holds approximately __ cu. ft. And weighs ___ lbs.
1 cu ft. and 94 lbs.
