METHOD STATEMENT FOR CONCRETING WORKS

• Level 1

•Submission of concrete design mix to superintending officer

• Level 2

•Upon approval of the design mix, Contractor shall prepare for concrete trial mix .

•Trial mixed shall be perform before any concreting works start.

•The trial mixed will consist of delivery time required from the mixing plan to construction site. Delivery time shall not exceed 2 hour from the time of mixing until pouring concrete. after 2 hours  Concrete will start to harden ( initial  set)

• Level 3

•The trial mix also will produce the  Slump value  and  the strength of the concrete for 3 days, 7 days, 14 days  and  28 days

•If the first trial mixed fail, contractor must repeat the trial  mixed until it meet the requirement or contractor will submit new design mixed and repeat the step 1 to 3 until it achieved the requirement.

• Level 4

•The Proposed concrete mixed can than be use for the construction after it meet all the minimum requirement.

• Level 5

•Before any concreting work, Contractor shall submit request for inspection form to enable S.O or S.O.R do the inspection for installation of Reinforcement, Formworks and any other requirement.

•No concreting works shall proceed until the S.O or S.O.R had given written approval to proceed concreting via Approval chit.

•Approval chit shall be submitted at least 1 day prior to concreting works.

• Level 6

•Upon receiving approval for proceed with concreting work, contractor shall ensure that they have  at least 2 concrete vibrator, lifting machine, concrete bucket and gunny sac for concrete curing.

•Level 7

•There shall be no concreting works shall proceed during rainy days. Shall there be rain, contractor must immediately stop the work.

•On the concreting day every truck of concrete shall be tested for its slump and concrete cube shall be taken and mark clearly with the date and location of the concreting work.

•Number of cube shall be at least 6 numbers. 3 numbers each for 7 days strength and 28 days strength or else as directed by S.O or S.O.R.

METHOD STATEMENT FOR FLEXIBLE PAVEMENT

WORK METHOD STATEMENT FOR PRIME COAT APPLICATION AND LAYING OF ACB28

Plant and machinery to be Used.

1.       10 tons lorry

2.       Pneumatic roller

3.       Steel wheel roller

4.       Paver

5.       Prime coat sprayer (hand sparing system).

Work method statement for Prime Coat.

1.       Prior to laying of Bituminous Prime coat all intended roadbase surface shall be clean from dirt and loose material.

2.       The road surface finishing shall be first been approved for compliance in accordance to drawings and specification by Resident Engineer.

3.       Laying of prime coat shall be done by method of spraying thoroughly on the approved Roadbase surface.

4.       Contractor shall maintained the bituminous prime coat temperature during spraying activities at a range of 50 deg. Celsius – 70 deg. Celsius for cut back bitumen,  25 deg. Celsius to 45 deg. Celsius for bitumen emulsion and 150 deg. Celsius to 165 deg. Celsius for 80-100 penetration grade bitumen.

5.       The spraying rate or rate of application shall be at a range of 0.5liter to 1.0 litre / square meter.

6.       The area sprayed with bituminous material shall not be open to public for at least 24 hour after application.

7.       Laying of prime coat shall be witness by Resident Engineer or his representative.

8.       There shall be not bituminous material being discharge into road drains, stream or river.

Work Method Statement for laying of Asphaltic concrete.

1.       The laying of Asphaltic concrete  shall only start after 24 hours of bituminous prime coat application.

2.       The laying of asphaltic concrete shall be done only during fine weather and the intended surface shall also dry or as permitted by the Resident Engineer or his representatives.

3.       All surface that intended to received Asphaltic concrete must first being check for any damage or deterioration. If such defect was found out, it shall be rectified before laying of the Asphaltic Concrete.

4.       Delivered asphaltic mix shall be check for its temperature. The temperature Shall within the range of 140 deg. Celsius to 160 deg. Celsius.

5.       The compaction of the Asphaltic concrete by rolling method shall commence as soon as possible after laying.

6.       Compaction shall be carried out by using Steel wheel roller as initial rolling followed by Pneumatic tyred roller.

7.       The final rolling shall again be carried out using steel wheel roller.

8.       All rolling shall be done in longitudinal direction.

9.       The laid layer of ACB 28 shall have a thickness of 50mm thick  with allowance of  -5mm thickness.

10.   Laying of Asphaltic concrete (where applicable), eg. Superelevation location, and on carriageway with cross-slope, shall start at the lower level towards the highest level. Laying shall not be carried out in a downhill direction.

11.   The section where Asphaltic concrete were laid, shall not be open to traffic for at least 4 hours after the commencement of rolling.  

12.   During the course of Asphaltic concrete laying activity, All necessary sign shall be erected  at both end of the intended work to notify public on the ongoing construction activities to prevent unwanted incident.

13.   Within 24 Hours after completion of the Laying works, Coring test shall be perform at selected location as required by Resident Engineer to verify the thickness of the ACB 28 Layer and the compaction density. The required compaction density for ACB28 shall be in the range of 95% to 100% Marshall density.

Method statement for external drainage works

Stage 1:Preliminaries and General Work

A. Contractor shall submit the proposed material and related miscellaneous item  as following item to    superintending officer (S.O) or his representative (S.O.R) for his approval.

1. 
   
2. Concrete mix design
3. Steel bar mill certificate
4. Detail Work Program
5. Reinforce concrete pile specification
6. piling set calculation
7. method statement for test pile and loading test
8. Quality control and Quality plan

Stage 2 : Construction Work Method statement

1. Prior to any excavation works and any other works related to external drainage system contractor shall prepare and proceed with the drain alignment and invert level setting out.
2. Upon completion of the setting out, Request for inspection form shall be submitted to superintending officer (S.O) or his Representative (S.O.R) to allow inspection being conducted before any subsequent work start. 
3. The excavation works can only start upon receipt of official acceptance for the setting out and approval to proceed works with subsequent activity.The Official reply on the inspection can be recorded in the submitted Request for inspection work or by any other means preferred by S.O/S.O.R.
4. Excavation work shall be done using combination of manual Labour and machinery.
5. Upon completion of the excavation work, contractor once again shall submit to S.O/S.O.R Request for Inspection form to enable inspection being conducted to confirm that the invert level of the drain are as per requirement.
6. Contractor then proceed with the setting out of the pile location for the piling work upon acceptance and approval to proceed with subsequent work from S.O/S.O.R.
7. When ever Contractor feel that the setting out for pile position have reach the numbers that is practical for them to proceed with pile driving work, Contractor shall once again submit the Request for Inspection  to enable inspection being carry out by S.O/S.O.R for the pile location setting out.
8. During the inspection and upon acceptance of the setting out by S.O/S.O.R, he shall determine the particular location for the test pile and pile loading test.
9. Contractor shall proceed with the first pile location that is the test pile location. There shall be no further pile driven work being carried out before the result of the test pile and pile loading test is approved and accepted by S.O/S.O.R . The Result MUST fulfil the design requirement.
10. Once the test result is deem to be in compliance with the requirement and officially approved and accept by S.O/S.O.R , Contractor then can continue with the remaining Pile drive in work and followed by cutting off the excess pile. 
11. All pile that are going to be used shall be properly inspect by S.O/S.O.R for any defect prior to piling works. Shall there be any unsuitable pile being detected, S.O/S.O.R shall give official instruction to contractor to remove out the pile from site as to prevent defective pile being use for the permanent works.
12. There shall be no piling works being carried out with out supervision of S.O/S.O.R.
13. Upon completion of the piling work, Contractor then proceed with the structure work of the drain.
14. the subsequent work are as follows;

• preparation of pile head
• laying of granular bedding
• laying of the lean concrete
• installation of the steel reinforcement for the drain
• installation of the formwork
• drain structure concreting work
• Curing works for the concrete
• removing the formwork
• Inspection to the concreted drain to detect any minor and major defect for immediate rectification work
• Inspection for the final invert level as to verify the constructed drain invert level are as per requirement.

15. Concreting work shall not being carried during raining day.

16. All inspection shall be conducted by S.O/S.O.R in the present of contractor.

17. Sample of concrete that being delivered to site shall be taken  for every 5 cu.m delivered batch and being                 tested for 3 day, 14 days and 28 days strength to make sure that the concrete use is as per requirement.

18. Shall the concrete grade is found to be of the lower grade, S.O/S.O.R shall request the contractor to do the rectification work according to a proper method requested by S.O/S.O.R.