Recycled Concrete Base from Unknown Sources Clause Samples

The 'Recycled Concrete Base from Unknown Sources' clause governs the use of recycled concrete material in construction projects when the origin of the recycled material cannot be specifically identified. Typically, this clause sets out requirements for testing, quality assurance, and documentation to ensure that the recycled concrete meets established engineering and environmental standards, regardless of its source. For example, it may require the contractor to provide laboratory test results demonstrating compliance with gradation, strength, and contaminant limits before the material is approved for use. The core function of this clause is to mitigate risks associated with using potentially variable or contaminated recycled materials, thereby ensuring the safety, durability, and regulatory compliance of the finished project.
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, ▇▇▇▇, ▇▇▇▇ 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: General Provisions 101 through 150.

Related to Recycled Concrete Base from Unknown Sources

  • Completion of Concrete Pours and Emergency Work (a) Except as provided in this sub-clause an Employee shall nor work or be required to work in the rain. (b) Employees shall not be required to start a concrete pour in Inclement Weather. (c) Where a concrete pour has been commenced prior to the commencement of a period of Inclement Weather Employees may be required to complete such concrete pour to a practical stage and for such work shall be paid at the rate of double time calculated to the next hour, and in the case of wet weather shall be provided with adequate wet weather gear. (d) If an Employee’s clothes become wet as a result of working in the rain during a concrete pour the Employee shall, unless the Employee has a change of dry working clothes available, be allowed to go home without loss of pay. (e) The provisions of clauses 32.7(c) and 32.7(d) hereof shall also apply in the case of emergency work where the Employees concerned and their delegates agree that the work is of an emergency nature and can start and/or proceed.

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