estimation & costing

1. ESTIMATION AND
COSTING
LIME CONC IN ROOF TERACING

2. MATERIALS
 COURSE AGGREGATE
 FINE AGGREGATE
 LIME

3. COURSE AGGREGATE
 COURSE AGGREGATE SHALL BE WELL BURNT
 IT CAN BURNT BRICK BALLAST OF 25 MM GAUGE
 POROUS BALLAST SHALL NOT BE USED
 IT SHALL PASS THROUGH 37.5CM SQUARE MESH

4. FINE AGGREGATE
 IT MAY BE SAND, SURKHI OR CINDER
 SAND SHALL BE CLEAN, COARSE AND FREE FROM SILT, CLAY
AND OTHER FOREIGN MATTERS.
 SURKHI IS USED WHEN PURE, CLEAN COARSE SAND IS NOT
AVAILABLE
 SURKHI USED SHALL BE FREE FROM DUST, DIRT

5. LIME
 LIME USED SHALL BE FRESHLY BURNT WHITE FAT LIME
 LIME USED SHALL BE FREE FROM ASHES AND OTHER
IMPURITIES
 LIME SHALL BE SLAKED AT SITE OF WORK

6.  PROPORTION OF CONCRETE SHALL BE 18:36:100
BY VOLUME.
 18 BEING LIME, 36 SAND AND 100 BRICK BALLAST
MIXING SHALL BE SIMILAR TO LIME CONC. IN FOUNDATION.

7. LAYING AND CONSOLIDATION
 ROOF WHICH MAY BE MADE OF RCC MAY BE LIGHTLY
SPRINKLED WITH WATER AND CONC. SHALL BE LAID IN
LAYERS SO AS TO OBTAIN REQUIRED SLOPE
 CONC. SHALL BE LIGHTLY RAMMED AND THEN PERFECTLY
LEVELLED
 CONC. IS KEPT FURTHER CONSOLIDATED BY BEATING WITH
WOODEN THAPIES FOR ABOUT 7 DAYS
 DURING BEATING CONC. IT SHALL BE SPRINKLED WITH A
SOLUTION OF LIME, GUR AND SOL. OF ‘BAEL’ FRUIT FOR
WATER PROOFING.

8. FINISHING
 AFTER BEATING A SOLUTION OF LIME, GUR AND SOL. OF
‘BAEL’ FRUIT IS SPREAD ON THE SURFACE AND
SMOOTHENED
 PLASTER IS NOT USED FOR THE FINISHING OF SUFACE
 SLOPE OF FINISHED SURFACE SHALL BE VARYING FROM
1:50 TO 1:36 TOWARD RAIN WATER OUTLET

9. CURING
 FINISHED SURFACE SHALL BE KEPT WET FOR ABOUT 10
DAYS
 THE MEASUREMENTS ARE TAKEN FOR AREA OF FINISHED
WORK IN SQ-M
 LENGTH-BREADTH SHALL BE MEASURED UPTO THE
ACCURACY OF 1CM AND AVERAGE THICKNESS UPTO 6MM
 NO DEDUCTION IS MADE FOR OPENING UPTO .4 SQ-M AND
NEITHER EXTRA PAYMENT IS MADE FOR FORMING SUCH
OPENING
 SURFACE FINISHING SHALL BE TAKEN AS SEPARATE ITEM
AND SHALL BE MEASURED IN SQ-M.

10. NOTE:
 IF INSTEAD OF FAT LIME KANKAR LIME IS TO BE USED THEN
SAND OR SURKHI IS NOT USED AND PROPORTION OF
KANKAR LIME TO BRICK BALLAST SHALL BE 45:100
 IF INSTEAD OF BRICK BALLAST, STONE BALLAST OF 25MM
GAUGE IS USED THEN PROPORTION OF LIME. SAND AND
STONE BALLAST BE 1:2:4 i.e. 25 CU-M, OF LIME TO 50 CU-M
OF SAND TO 10 CU-M OF STONE BALLAST