JIS A 5031:2016

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Melt-solidified slag aggregate for concrete derived from municipal solid waste and sewage sludge (Foreign Standard)
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2016



JIS A 5031:2016 specifies the melt-solidified aggregate for concrete manufactured by melting the municipal solid waste, sewage sludge and their burned ashes at a temperature at least as high as 1 200 °C and cooling and solidifying them (hereafter referred to as molten slad aggregate).

The molten slag aggregate is an aggregate manufactured for the purpose of efficient utilization of the municipal solid waste, sewage sludge, etc. in their melt-solidifying facilities, and includes the following.

  • The molten slag aggregate produced in private melt-solidifying facilities which are entrusted by the municipal authorities to treat municipal solid waste, or that produced when municipal solid waste is treated together with industrial waste whose reuse is approved by the municipal authorities.
  • The molten slag aggregate subjected to magnetic selection, particle size adjustment, etc. property modification in the melt-solidifying facilities or separate facilities.
  • Slag manufactured from melting furnace fly ash, though not normally included in the molten slag aggregate, which has been produced in melt-solidifying facilities equipped with control system meeting the environmental safety quality criteria specified in 5.7.

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