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  2. Rebar - Wikipedia

    en.wikipedia.org/wiki/Rebar

    Rebar (short for reinforcing bar), ... (kg/m) Nominal diameter (mm) Cross-sectional Area (mm 2) 10M 0.785 11.3 100 15M 1.570 16.0 200

  3. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1] Reinforced concrete is the most common form of concrete. The reinforcement is often steel rebar (mesh, spiral, bars and other forms). Structural fibers of various materials are available.

  4. Ecology block - Wikipedia

    en.wikipedia.org/wiki/Ecology_block

    Ecology blocks are manufactured using concrete left over from other construction processes. A cross-section of an eco-block typically measures 2 feet (61 cm) square, with block lengths ranging from 3 feet (91 cm) to 6 feet (180 cm). One block weighs between 1,800 pounds (820 kg) and 4,000 pounds (1,800 kg). [1]

  5. Types of concrete - Wikipedia

    en.wikipedia.org/wiki/Types_of_concrete

    The parts are in terms of weight – not volume. For example, 1-cubic-foot (0.028 m 3) of concrete would be made using 22 lb (10.0 kg) cement, 10 lb (4.5 kg) water, 41 lb (19 kg) dry sand, 70 lb (32 kg) dry stone (1/2" to 3/4" stone). This would make 1-cubic-foot (0.028 m 3) of concrete and would weigh about 143 lb (65 kg). The sand should be ...

  6. Foam concrete - Wikipedia

    en.wikipedia.org/wiki/Foam_concrete

    Foamed concrete can be produced with dry densities of 400 to 1600 kg/m 3 (25 lb/ft 3 to 100 lb/ft 3), with 7-day strengths of approximately 1 to 10 N/mm 2 (145 to 1450 psi) respectively. Foam concrete is fire resistant, and its thermal and acoustical insulation properties make it ideal for a wide range of purposes, from insulating floors and ...

  7. Specific weight - Wikipedia

    en.wikipedia.org/wiki/Specific_weight

    The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...

  8. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    The weight helps to keep them in place when traffic passes over them, and makes it difficult for unauthorized people without suitable tools to remove them. Manhole covers may also be made from glass-reinforced plastic or other composite material (especially in Europe, or where cover theft is of concern).

  9. Waste light concrete - Wikipedia

    en.wikipedia.org/wiki/Waste_light_concrete

    In general, the compressive strength of the final products is between 3 N/mm 2 to 12 N/mm 2 with a weight of 100 kg/m 3 to 800 kg/m 3. Traditional gravel-concrete can be 40 N/mm 2 strong and weigh over 2.000 kg/m 3.

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