Asphalt Plant

Asphalt Paving Crew :

1. Qualified asphalt paving crew led by a 35 years experienced supervisor.
2. Asphalt paving equipment list attached here with this methods.

Rate of Spread :

For a given width and thickness, the lineal meter long of the pavement per ton on paving mix can be determined.

Source of Materials for Asphalt Mixtures :

1. Mineral aggregates gabbros stone that has been crushed and screened according to M.P.W road paving specification that aggregate from Al-Slbookh Trading Co. stored in separate stockpiles at storage area in the asphalt plant.
2. Asphalt cement (bitumen) 60/70 penetration grad from K.N.P.C – Kuwait.
3. Mineral filler consist of finely ground particles of limestone cement from National Industries Kuwait co.
4. Natural sand from Al-Bolshie Trading Co.
5. Prim coat (MC 70) from K.N.P.C — Kuwait.
6. Tack coat-Emulsified Asphalt slow setting cationic or anionic type of SS-1h or CSS-1h Grade from Kuwait Asphalt Emulsion production Co.

QUALITY CONTROL PLAN

Stage I: Sampling and Testing Aggregates Stockpiles

Aggregate submitted from the supplier should be tested as the following tests:

1. Sieve analysis of coarse and fine aggregate.
2. Unit weight of coarse aggregate.
3. Clay lumps and friable particle for coarse aggregate.
4. Sand equivalent for sand.
5. Specific gravity and absorption test for coarse and fine aggregate.

Stage II: Calibrating and Setting Feeders for Cold Bins

The cold aggregates feeder gates should be calibrated to prepare calibration chart for each cold bin (11/2"@3/4"@3/8"@ Crushed Sand@ Natural Sand) using the same Aggregate in the asphalt mix design.

Stage III: Hot Bins Calibration

Hot bin calibration should be done for each type of asphalt according to the aggregate percent passing in asphalt mix design which is approved from the M.P.W to determine specified weight scales to be taken from each different fraction. Then standard aggregate weights are placed and attached to the asphalt aggregate scale reading. Then a sample should be taken from each hot bin to determine the aggregate combination of mineral aggregate, sand, filler and bitumen to compare with job mix specification.

Stage IV: Sampling @ Testing for Asphalt Mix Production

1. Checking on asphalt mix temperature during the production.
2. Checking the job mix composition by obtaining sampling asphalt mixture from storage tanks or truck tanks during unloading asphalt mixes production to determine sieve analysis of aggregates and percentage of bitumen in asphalt mixes using reflux extractor method.
3. Checking on Marshall Mix design for bulk density, stability and flow.
4. Sampling for checking specific gravity of compacted asphalt mix design. 

SPREADING HOT MIX ASPHALT :

1. After receiving asphalt mix in the site a routine task of our supervisor is to collect load tickets from truck driver at the point of delivery in the site.
2. Asphalt mix temperature should be checked for every truckload before paving start.
3. When the paver is positioned on the road the screed should be lowered on the blocks having the thickness control, screws on the screed are adjusted for the depth required. The paver should then begin spreading at the proper depth of the material. As the paver spreads its first load of asphalt mix, the mat should frequently be checked for thickness.
4. Compacting hot mix asphalt with rolling should start as soon as possible after the asphalt mix has been spread by the paver to obtain the required density and well-kneaded surface using steel rollers with vibration for initial pass and then steel rollers without vibrating with pneumatic tired rollers together using rollers which move at a slow but uniform speed equal to the drive roll or wheels nearest to the paver and the speed must not exceed 3 mph for steel rollers and 5 mph for pneumatic tired rollers.
5. Rolling finishing is done solely for the improvement of the surface.

Sampling :

1. In addition to obtaining compacted samples for measurements for extraction and gradation tests, before it has been compacted. These samples taken from behind the hopper of the paver, the sample is representative to lot of measurements being tested.
2. The degree of compaction obtained by rolling is determined by density test and asphalt core cutting machine used for taking samples provided from roadway.
3. These samples are transported to the asphalt plant laboratory to test it in accordance with the method of the specific gravity of the compressed bitumen mixture AASHTO T 166

Daily Production Capacity and Asphalt Paving Crew Coverage Area :

Asphalt plants production capacity per day = 350 T/H * 8 (hours) = 2800 T/day