<p>1. Fill and Bedding Aggregate:<br />
1. General: Fill aggregate shall consist of inert, clean, hard, durable, natural and uncoated&nbsp;particles of consistent quality throughout, well balanced, with no salt, organic material,<br />
clay shale or adobe, and washed when necessary to meet specified requirements. Fill&nbsp;shall conform to Soil Classification Group GW, GP, GM, SM, SW or SP when classified<br />
in accordance with ASTM D2487; or A-1, A-2-4, A-2-5 or A-3 when classified in&nbsp;accordance with AASHTO M147.<br />
2. Subbase Fill: Maximum size aggregate 100mm.<br />
3. Backfill and Base Fill: Maximum size aggregate 50mm.<br />
4. Sand: To meet specified requirements of Section 03300 for fine aggregate&nbsp;incorporated in concrete.<br />
5. Bedding Aggregate : For underground services, 19mm blend of crushed stone or&nbsp;crushed gravel, of uniform grading and quality, and graded within the following limits as<br />
expressed by the percentage of aggregate passing dimensioned square sieve&nbsp;openings: 100% - 26.5mm; 85 to100% - 19mm; 55 to 100% - 16mm; 30 to 70 % -<br />
13.2mm; 15 to 40% - 9.5mm. No more than 10% may pass a 4.75mm sieve.<br />
2. Concrete: To meet specified requirements of Section 03300.<br />
3. PVC Pipe: to meet specified requirements of BS 3506, with a diameter of 90mm and&nbsp;nominal wall thickness of 3.25mm.</p>
