The pad is poured! by rhoing

The pad is poured!

Know the difference between “cement” and “concrete”? I knew there was a difference, but I had to “look it up.”

From the Portland Cement Association:
“Portland cement is the basic ingredient of concrete. Concrete is formed with portland cement creates a paste with water that binds with sand and rock to harden.

“Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients.

“Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore. These ingredients, when heated at high temperatures form a rock-like substance that is ground into the fine powder that we commonly think of as cement.

“Bricklayer Joseph Aspdin of Leeds, England first made portland cement early in the 19th century by burning powdered limestone and clay in his kitchen stove. With this crude method, he laid the foundation for an industry that annually processes literally mountains of limestone, clay, cement rock, and other materials into a powder so fine it will pass through a sieve capable of holding water.”

“In its simplest form, concrete is a mixture of paste and aggregates. The paste, composed of portland cement and water, coats the surface of the fine and coarse aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.”

“Ready-mixed concrete, far the most common form, accounts for nearly three-fourths of all concrete. It's batched at local plants for delivery in the familiar trucks with revolving drums.”

1 year ago (“Datura metel”):
2 years ago (“Second [self-] challenge”):
3 years ago (“State Fair ‘monster’”):

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I love a freshly poured pad...says the developer's daughter.
September 14th, 2014  
@danette It's a fascinating process!
September 16th, 2014  
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