Bids are hereby invited for the supply and delivery of G5 material for Lower Berg River GWS: 24 Rivers and Little Berg River Canals Maintenance Project in the Western Cape for Construction South. Specifications: 1. The property: Material type: G5 2. Additional fines: May contain approved natural fines not obtained from parent rock, 3. Material description: Natural gravel, or natural gravel and boulders which may require crushing or crushed rock, 4. Nominal maximum size: (a) Uncrushed material: 63mm, (b) Crushed material before compaction 53mm, 5. Grading modulus (GM): The percentage by mass passing the 2,00 mm sieve shall not be less than 20% nor more than 70%, 2.5 smaller & equal GM smaller & equal 1.5, 6. Atterberg limits for natural material - 0.425 mm fraction: (a) All material except calcrete: LL shall not exceed 30, PI shall not exceed 10, LS shall not exceed 5%, (b) In the case of Calcrete: LL greater than 30, PI greater than 15, LS greater than 6 (% passing 0.425mm sieve LS greater than 320, 7. Durability: Mud rock shall have a wet 10% FACT value of not less than 90Kn, and wet/dry venter test of I or II, 8. Soluble salts: The material shall comply with the requirements for clause 3602, 9. Strength (CBR): CBR at 95% of modified AASHTO density shall not be less than 45%, 10. Swell (maximum): Swell at 100% mod AASHTO density shall not exceed 0.5%. (投標 №114721280cn)