Reconcilation during construction project

Reconcilation during construction projects means to compare records of actual consumption and supplied. And is normally done for bulk material like steel , cement and aggregates. Though there are no established way or procedure to do the reconcilation, but here are the thumb rules to be kept in mind.

1. Fine Sand or Sand constitutes about 35% of the total aggregate quantities.

2. Total Aggregate quantities per m3 of concrete is about 45 Cubic feet or CFT. Wastage is assumed at 2%.

3. Cement wastage is also taken at 2%.

4. Wastage in steel is taken from 2 to 4% depending on the contract.

5. Normally the wastage in steel is because of

6. Improper Bar Bending Schedule

7. Laps, Chair and Spaces

8. Off cuts

9. Miscelaneous Uses

10. and Theft

11. Waste in aggregate is normally because of

12. High moisture content during procuring

13. Improper or high use of aggregate

14. Problems with the batching mixture

15. Improper density of the aggregate .

16. Huge waste of material can be in site because of lack of joint measurement at site. So, Reconcilation is also a way to assess if some joint measurement is missing or not.

17. Though theoratically the density of steel is 7650 Kg/m3 , and that of cement is 1600 kg/m3; Variation may occure during actual practice. It becomes necessary especially in large projects to keep a measure of the difference in register.

18. Some common waste percentage during reconcilation is given below

RECONSOLDING