Chapter 7: Local Road Maintenance Management 220 Table 7.7 Sealing Bituminous Pavements Purpose To prevent further deterioration caused by entry of water. Procedure 1. Remove debris from cracks or clean raveled surface. 2. For individual cracks; ifll cracks completely with asphalt; use squeegee to force asphalt into cracks and remove excess. 3. For areas; apply asphalt, distribute with broom and remove excess with squeegee. 4. Apply cover sand. Notes • Sealing is generally applied to crack of more than 3mm in width. • Loose damaged part around cracks should be removed. • Fill cracks with bituminous material at a temperature of 180 to 200 degrees centigrade. • For deep crack, ifll it twice with asphalt. • Sealing for wide area is effective for preventive maintenance if it is carried out regularly prior to rainy season. • Aggregate to be used should be clean, hard and durable.