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  2. Recycling by material - Wikipedia

    en.wikipedia.org/wiki/Recycling_by_material

    Crushing concrete from an airfield Concrete recycling is the use of rubble from demolished concrete structures. Recycling is cheaper and more ecological than trucking rubble to a landfill. [3] Crushed rubble can be used for road gravel, revetments, retaining walls, landscaping gravel, or raw material for new concrete. Large pieces can be used ...

  3. Precast concrete - Wikipedia

    en.wikipedia.org/wiki/Precast_concrete

    Precast concrete molds can be made of timber, steel, plastic, rubber, fiberglass, or other synthetic materials, with each giving a unique finish. [3] In addition, many surface finishes for the four precast wall panel types – sandwich, plastered sandwich, inner layer and cladding panels – are available, including those creating the looks of ...

  4. Waste light concrete - Wikipedia

    en.wikipedia.org/wiki/Waste_light_concrete

    As a comparison, plastic road claims to dispose 8–10 kg (or 4-6%) of selected and washed plastic waste in the road surface per tons of asphalt, [4] while waste light concrete can dispose around 800 kg / tons of road base concrete with only low energy consumption shredding and mixing at room temperature. However, these two technologies can be ...

  5. Polymer concrete - Wikipedia

    en.wikipedia.org/wiki/Polymer_concrete

    Polymer concrete is a type of concrete that uses a polymer to replace lime-type cements as a binder. One specific type is epoxy granite , where the polymer used is exclusively epoxy . In some cases the polymer is used in addition to portland cement to form Polymer Cement Concrete (PCC) or Polymer Modified Concrete (PMC). [ 1 ]

  6. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    Concrete floor of a parking garage being placed Pouring and smoothing out concrete at Palisades Park in Washington, DC. Workability is the ability of a fresh (plastic) concrete mix to fill the form/mold properly with the desired work (pouring, pumping, spreading, tamping, vibration) and without reducing the concrete's quality.

  7. Formwork - Wikipedia

    en.wikipedia.org/wiki/Formwork

    For removable forms, once the concrete has been poured into formwork and has set (or cured), the formwork is struck or stripped to expose the finished concrete. The time between pouring and stripping depends on the job specifications, which include the cure required, and whether the form is supporting any weight; it is usually at least 24 hours ...

  8. Rebar spacer - Wikipedia

    en.wikipedia.org/wiki/Rebar_spacer

    Plastic has mechanical properties (holds the bar in position) but no structural properties, and is a foreign element within the construction. When the concrete is poured into the form, a small gap is created between the concrete and the plastic. Plastic has a coefficient of thermal expansion and contraction 10 to 15 times that of concrete. [1]

  9. Polyethylene - Wikipedia

    en.wikipedia.org/wiki/Polyethylene

    Since 2008, Japan has increased plastic recycling, but still has a large amount of plastic wrapping which goes to waste. Plastic recycling in Japan is a potential US$90 billion market. [26] It is possible to rapidly convert polyethylene to hydrogen and graphene by heating. The energy needed is much less than for producing hydrogen by electrolysis.

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