Cement is a fine, gray powder that is used as a construction binding material. When mixed with water, cement reacts chemically and becomes hard and strong. Cement is categorized as either hydraulic or nonhydraulic, depending on how it mixes with water.Know More
Nonhydraulic cement does not harden underwater or in damp conditions. Certain chemicals are added to make hydraulic cement, which sets underwater or in wet conditions.
Cement is made by combining silicon, aluminum, iron, calcium and other chemicals in a controlled mixture. Other materials added to the mixture include chalk, clay, slate and limestone. When combined, the ingredients form a hard substance that is ground into cement.
Cement is also known as Portland cement. It was invented by Englishman Joseph Aspdin in 1824 and was named for its similarity to limestone from the Isle of Portland. The word cement originated in the time of the Romans, whose term opus caementicium referred to masonry similar to modern concrete.
Portland cement is the main ingredient in concrete, which is made by adding rock, sand and water to form a paste that hardens. Concrete is made stronger by adding more cement and is weakened by adding more water. Concrete is used in most buildings, bridges and tunnels due to its strength. Moisture and pests do not weaken it, and it can withstand most natural disasters, including earthquakes and hurricanes.Learn More
Color existing concrete by cleaning the surface, applying a transparent stain. After 4 hours, inspect the concrete to determine if you need a second coat and applying it. After applying the sealer, allow sufficient time for the sealer to cure before allowing traffic on the surface.Full Answer >
Roof shingle color is a personal preference, but homeowners should select a color by deciding what looks best on the house or structure that requires it. Looking at other houses or showroom displays helps a buyer to visualize roof and siding/brick combinations.Full Answer >
A concrete driveway takes 24 to 48 hours to dry. Walking on the driveway without damaging the concrete is possible after this time. Even though concrete is solid after two days, there are still time limits on what the driveway can handle.Full Answer >
The best cold insulation materials are those that poor conductors of heat. Materials such as glass, plastic, polystyrene and fiberglass are poor conductors of heat and are therefore effective as insulation. Materials that are good conductors of heat, such as metals, are poor insulators.Full Answer >