Who Invented Cement?
Who Invented Cement? Concrete is a material used in building construction, consisting of a hard, chemically inert substance, known as an aggregate (usually made from...
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How Are Stained Glass Windows Made?
How Are Stained Glass Windows Made? In a church you often see windows decorated with colorful pictures and designs. The windows are made of many pieces of colored...
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What Is Cement Made From?
What Is Cement Made From? Cement is made from a mixture of lime, clay, silica, iron and aluminum minerals. Limestone is the most important source for the calcium, while...
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How Are Bricks Made?
The ordinary bricks a bricklayer uses to construct a brick building are made from clay that is baked in an oven. The clay is mixed with sand and water. This “mud” is...
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