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24.12 38 mm thick compacted pre-mixed bituminous carpeting with 20 mm down graded stone-chips (having LAA value <= 30%, water absorption not greater than 2%, flakiness index not greater than 35) of gradation as specified @ 0.63 cum of stonechips mixed with 37 kg heated bitumen of 60/70 penetration grade heated straight run bitumen satisfying the requirements of ASTM/AASHTO. Bitumen content % by wt. of total is 4.5% to 5.50% or as determined by job mix design. The bitumen and stone-chips shall be separately heated to a temperature of 140°C – 155°C and 150°C – 170°C respectively before mixing. The mixing shall be done at temperature between 140°C – 160°C at a separate place away from the fire. The bitumen and stone-chips mixture shall be laid uniformly over 10 sqm of surface in proper camber, grade and super-elevation only on the prepared and accepted base or surface in a single appropriate layer to give the specified compacted thickness. The mixture should be rolled with appropriate steel drum roller (3-5 tons) & pneumatic multiple tire roller (8-10 tons) to full compaction. The rolling temperature shall be maintained not below 90°C including supplying of all materials, their carriage, labourers, tools and equipment etc. all complete as per direction of the Engineer-in-charge. (In order to achieve the specified grading a blending of nominal maximum size of 20 mm, 12 mm crushed stone chips and stone dust is suggested and proportion will have to be determined by the laboratory analysis).

Considering 100 sft of work

SL Item Name Quantity Unit Item Rate (Taka) Item Unit Unit Price (Taka) Sub Total (Taka)
1 19 mm (3/4") down grade crushed stone chips Cost of materials : Stone Chips (20 mm downgraded) 4.43 cft 21804 per % cft 218.04 965.92
2 12 mm (1/2") down grade stone chips Stone Chips (12 mm downgraded) 10.63 cft 17840 per % cft 178.4 1896.39
3 60/70 grade bitumen for road work Bitumen (60/70 grade) 76 lbs 56000 per M. ton 25.4 1930.4
4 Fire-wood Stone Dust (2.38 mm downgraded) 1 mnds 220 per mound 220 220
5 Mason / Mosaic mistry Labour charges: Mason 0.026 no 700 per day 700 18.2
6 Skilled labour Skilled labour 0.158 no 600 per day 600 94.8
7 Ordinary labour Ordinary labour 0.65 no 550 per day 550 357.5
8 Ordinary labour Sundries and T & P 1 LS 550 per day 183.33 183.33
9 Hire charge of vibratory (ride on) roller with 2 steel drum compactor (3-5 tons) Equipment Charges: Hire Charge of Vibratory (Ride On) Roller 2 Steel Drum Compactor (3-5 tons) 0.015 days 5500 per day 5500 82.5
10 Hire charge of pneumatic multiple tired roller (7 tires, 8-10 tons) Hire Charge of Pneumatic Multiple Tired Roller (7 tires, 8-10 tons) 0.015 days 5000 per day 5000 75
11 Diesel Diesel 0.251 liter 68 litre 68 17.07
12 Lubricants Lubricants 0.025 liter 220 per litre 220 5.5
13 Stone dust (2.38 mm down grade) Cost of materials : Stone Dust (2.38 mm downgraded) 2.66 cft 5500 per % cft 55 146.3
Sub-Total 5992.91
Contractor's Profit 10% 0.1 599.29
Contractor's Overhead Expenses 3.5% 0.035 209.75
Total 6801.95
Add VAT with adjustment factor. 1.08108 7.5% 0.075 551.51
Grand Total 7353.46
Rate per sft 73.53
Rate per sqm 791.48
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