Common use of Recycled Concrete Base from Unknown Sources Clause in Contracts

Recycled Concrete Base from Unknown Sources. Use recycled concrete derived from sources of demolition materials that comply with the following requirements as a base, subbase or shoulder course. Due to the condition and type of raw material used to produce this base and the resulting difficulty in producing a consistent product, refer to SOP-1 for environmental requirements and preferred production procedures. Ensure the finished product does not exceed the regulatory limit for asbestos of 1 percent (based on microscopy) and the regulatory limit for lead of 5 ppm. These determinations must be made prior to shipping. Ensure the California Bearing Ratio (CBR) of the finished product is not less than 120. Gradation and Load-Bearing Capacity Ensure the finished product meets the quality and gradation requirements of Subsection 815.2.01 for Group II aggregates, except the material finer than a No. 200 (75µm) sieve shall be 2 – 11 percent. Contaminants Ensure the recycled concrete is substantially free of foreign materials such as steel reinforcement, xxxx, xxxx balls, soils, epoxy expansion material and non-construction materials. Note – Substantially free, in the context of this specification, shall mean concentrations of the above-mentioned foreign materials individually shall not exceed 0.1 percent by weight, nor shall the total concentration of these materials exceed 0.5 percent by weight. Ensure the finished product does not exceed the regulatory limit for asbestos of 1% (based on microscopy) and the regulatory limit for lead of 5 ppm. Keep the following ancillary materials within these limits: Substance Maximum Percent by Weight Brick 2 Asphaltic Concrete 5 Weathered Rock 2 Any combination of Brick, Asphaltic Concrete or Weathered Rock 7 B. Fabrication General Provisions 101 through 150.