Quality Plan

1. Lineout & Building Setting
2. Excavation
3. Plain Cement Concrete
4. Plinth Work, Filling, Rubble Soling, P.C.C. & Plinth Protection
5. Reinforced Cement Concrete
6. Masonry
7. Internal And External Plastering
8. Waterproofing
9. Pre‐Constructional Anti‐Termite Treatment
10. Road Work


1. LINEOUT & BUILDING SETTING


1. All vertical posts should be properly fixed in concrete with top at same level and stays at every fifth post.

2. Railing should be straight, leveled and joints should be flushed and nailed.

3. To ensure that railing does not obstruct any vehicular traffic, it should not be near a road.

4. Periodical checking should be done by measuring distance of each nail from the face marking, and variations, if any, should be rectified immediately.

5. Height of railing should be minimum to reduce chances of error while plotting the centre inside the excavated pits for the column footings.

6. All column numbers marked on the railing should be visible.
7. Nails should not be disturbed till completion of the plinth beam work and railing should be removed with the consent of the engineer.

8. If adjoining building work is complete, checking should be done considering expansion joint before starting the new building. Previous building level and column centre should
be used as reference.

9. Any discrepancies or errors found at any stage should be immediately brought to the notice of the Architect or higher authorities.

 

2. EXCAVATION


1. Check the gridline and dimensions of the trench/ foundation with the drawing provide allowance of 150mm all round the trench. Don’t allow de‐shaping the pit during excavation.

2. Confirm the strata in consultation with the consultant before proceeding for P.C.C.

3. Excavate the foundation pit at the same level and avoid resting of the footing on sloping strata.

4. Remove all the loose excavated material, roots of plants, trees, etc. and clean the pit.

5. Give the size of excavation pit to avail the working space for carpenter to fix and remove the shuttering box of P.C.C.

6. Proper barricading, shoring, shuttering must be provided for safety wherever required.

7. Insist on the foundation drawing to be incorporated with the centre line plan to crosscheck the overlapping of foundation, orientation of the column, etc.

8. De‐watering of the pits should be well planned and de‐watering should be laid in storm water drain. Any kind of water flooding near the pit is to be avoided.

9. Necessary permission should be obtained prior to shifting underground service lines such as drainage, electric cables, water lines etc. before the work begins.

10. Ensure technical safety by maintaining proper slope of cut depending upon the soil characteristics.

11. Sufficient light arrangements should be made for work in the night shifts.

12. Ensure that the foundation of adjacent buildings is not exposed while excavating the basement.

13. Ensure technical safety by maintaining proper slope of cut depending upon the soil characteristics.

 

3. PLAIN CEMENT CONCRETE


1. Ensure that measurement boxes are ready before starting this activity if required.

2. Use the chute or additional labor to pour the concrete where the depth is more.

3. If water table is high de‐watering should be carried out simultaneously during concreting.

4. Take cares to sprinkle water and ram foundation pit before placing concrete.

5. Compact and level the concrete properly.

6. Proper “thiyas” for level to be taken before start of work.

 

4. PLINTH WORK, FILLING, RUBBLE SOLING, P.C.C. & PLINTH PROTECTION


1. PLINTH WORK:
a) Check the level of masonry work with respect to the plinth level.
b) Check that all stub columns are cast (2”) above plinth or up to bottom of plinth beam as required.
c) Check the distance between masonry walls for room dimensions.
d) Check and keep the proper sunk for W. C., bath and toilets.


2. FILLING:
a) Fill the plinth with Murom or approved excavated stuff.
b) See that filling is done in layers, spread, watered and compacted, no layer being greater than 30cm.
c) Take care to ram near walls, columns and plinth beam sides in layers of 15cm thickness properly.
d) Ensure that the consolidated top layer is dressed to required slope and level.


3. RUBBLE SOLING:
a) The rubble should be hard, durable and free from other defects. The rubble should be of suitable size and shape to give the required compacted thickness.
b) The rubble is laid in vertical position of the sub‐grade but closely packed by arranging the stones.
c) The filling of the interstices with quarry spalls/ metal is to be carried out simultaneously with the placing of the rubble.
d) Ramming near the walls and column is to be done properly to the required level/slope, camber etc.
e) Rubble is laid from edge to crown for road rubble soling and surface rolling also to follow the same pattern to achieve the required camber.

4. P.C.C.:
a) Get the side shuttering for P.C.C. and mark the exact level of the P.C.C. top.
b) Take intermediate thiyas and confirm the uniform thickness of P.C.C. throughout.
c) Rectify the ups and downs, observed in the above points.
d) Compact the P.C.C. with rammer.
e) Level and finish the P.C.C.


5. PLINTH PROTECTION:
a) Check the drawing to see if plinth protection is given or not.
b) If yes, follow the procedure specified and complete the plinth protection.
c) Construct the steps of plinth (in masonry) keeping the margin for floor finish. Do not confuse the plinth level with F.F.L. (Floor Finish Level).
d) Check the drawing to see if plinth protection is given or not.
e) If yes, follow the procedure specified and complete the plinth protection.
f) Construct the steps of plinth (in masonry) keeping the margin for floor finish. Do not confuse the plinth level with F.F.L. (Floor Finish Level).

 

5. REINFORCED CEMENT CONCRETE


1. BATCHING:
a) The material should be stockpiled for several hours preferably a day before use.
b) Grading of aggregate should be visibly checked frequently for consistency.
c) In case of volume batching, allowance for bulking should be made.
d) In case of weigh batching, carry routine checks of weights as well as sensitivity of balance.


2. MIXING:
a) Ensure that the drum and the hopper are completely empty.
b) While loading the material, coarse aggregate is generally placed at the bottom, cement in the centre, and the fine aggregate on top.
c) Drum of the mixer should not be overloaded.
d) Mixer should run for 1½ to 2 minutes.
e) Addition of admixtures should be done at specified stage in required dosage.
f) If there is segregation after unloading from the mixer, the concrete should be remixed.


3. TRANSPORTING AND HANDLING :
a) Concrete should be transported to the formwork as rapidly as possible by methods
that will prevent segregation or any loss of ingredients.


4. PLACING:
a) Proper walkways are to be provided in advance.
b) Before starting concrete, fix the position of construction joint if required.
c) Sequence of concreting should to be finalized.
d) Ensure placement of concrete as nearly as practicable in its final position to avoid rehandling before initial setting starts.
e) Avoid segregation of materials by adopting maximum drop of 1.5m.
f) Lay concrete in suitable layers of 20 to 30 cm without any break in continuity.


5. COMPACTION:
a) Use suitable types of immersion, surface or form vibrators.
b) Concrete should be thoroughly compacted and fully worked around the reinforcement, around embedded fixtures and into corners of the formwork.
c) Over‐vibration and under‐vibration should be avoided.
d) Check the shuttering during vibrating for damages or bulging.
e) Switch off the vibrator if cement slurry flows out from the shuttering.
f) Do not stop the vibrator when needle is in the concrete.
g) Keep enough spare vibrators & needles.


6. CONSTRUCTION JOINTS AND COLD JOINTS:
a) Joints are a common source of weakness and should be avoided or else minimized.
b) At construction joints, it is recommended to clean out laitance and cement slurry by using wire brush on the surface of joint immediately after initial setting of concrete.
The prepared surface should be in a clean saturated surface dry condition when fresh concrete is placed, against it.
c) Where construction joint is cast against shuttering, the surface should be appropriately roughened before new concrete is poured against it.
d) Fresh concrete should be thoroughly vibrated near construction joint so that mortar from the new concrete flows between large aggregates and develops proper bond with old concrete.


7. CURING:
a) Curing can be done by two methods.
i) Moist curing: Concrete is kept continuously in a damp or wet condition by ponding or by covering with a layer of sacking, canvas, hessian or similar
materials for following minimum periods:
(1) Ordinary Portland Cement 7 days
(2) Mineral admixtures or Blended cement 10 days
(3) Concrete exposed to alternate wet/dry conditions 10 days
ii) Membrane curing: Curing compounds may be applied to all exposed surfaces of concrete as soon as possible after concrete has set. Impermeable membranes such as polyethylene sheeting cover wrapped close to concrete surface may be used.


8. FORMWORK:
a) Formwork should be designed and constructed so as to remain sufficiently rigid during placing and compaction of concrete and shall be such as to prevent loss of slurry from the concrete.
b) Shape, size, line and level of the formwork should be checked before concreting.
c) All rubbish, particularly chippings, shavings and sawdust should be removed from the interior of the forms before the concrete is placed.
d) The face of formwork in contact with concrete should be cleaned and treated with thin coating form release agent, with proper care so as to avoid contact with reinforcement.
e) Position of pocket, inserts should be checked before concreting.
f) Usage of binding wires should be minimized.
g) Column stirrups should be tied within beam depth before shuttering.
h) Care should be taken while doing formwork for column topi (cap).
i) Formwork should be checked for small ghabadis that should be rectified before concreting.
j) De‐shuttering (Stripping) should be carried after specified periods as mentioned in IS:
456‐2000 or latest relevant code.
k) De‐shuttering should be carried out with sufficient care so as to not damage the edges/ faces of R.C.C. members.
l) After de‐shuttering, all the materials should be properly stacked and cleaned for next repetition.


9. REINFORCEMENT:
a) Ensure that reinforcement bars are clean free from grease, oil, paint, rust, dust or any objectionable material.
b) HYSD steel bars should not be re‐bent or straightened without approval.
c) All reinforcement should be placed and maintained in the position shown in the drawing by providing proper cover blocks, spacers, supporting bars, etc.
d) Rough handling, shock loading and the dropping of reinforcement from a height should be avoided.
e) Spacers, chairs, cover blocks and other supports detailed on drawings and otherwise necessary should be used to maintain specified cover to the steel reinforcement.
f) Spacers, cover blocks should be of concrete of same strength or PVC.
g) Check reinforcement location, size, spacing, numbers, overlaps, welded joints, hooks, bent‐ups, ties, anchorage, binding etc. as per drawing/ bending schedule.

 

6. MASONRY


1. STONE MASONRY:
a) The stone shall be tough, hard, durable, uniformly coloured, and have pretty equal size.
b) Stones shall be laid on their broadest face with proper shaping and dressing with loose material removed after wetting.
c) Sufficient number of stones, of the required size, should be stocked as per the type of masonry, including corners and headers.
d) Joints must be filled neatly.
e) To fill up hollow spaces in masonry, small clean chips/ stones should be used not exceeding 20%.
f) Required number of headers should be used.
g) New masonry work should not be started without roughening & scrubbing old masonry.
h) Masonry shall be carried out uniformly in a level throughout, but where breaks are unavoidable, the joint will be made in good long steps so as to prevent cracks between old and new work.
i) Mortar shall be prepared on a plain and hard platform. Proportion of mortar should be as specified and should be maintained by using farmas.
j) When plastering or pointing is to be done, after completion of the day’s work,
masonry joints shall be raked while the mortar is still green.
k) Curing should be done for minimum 7 days.


2. BRICK & BLOCK MASONRY:
a) Bricks should be good and of uniform size, shape and color. They should not be under or over‐burnt bricks.
b) Before construction work, all bricks should be soaked.
c) Mixing of mortar must be done as per specified proportion on an impervious platform. Mortar must be placed within 30 minutes of mixing water.
d) Proper hacking of RCC surface in contact of brick masonry for proper bond should be done.
e) Bricks should be placed with frog up. Brick on edge should be avoided unless specified. Brickbats should be avoided.
f) English bond is preferable.
g) First layer should be done under supervision for marking door, window openings to be kept accurately as per the drawing.
h) Horizontal and vertical joints of each layer shall be filled fully and neatly and should not be more than 13‐mm thickness.
i) Joints should be raked smooth and clean with a trowel when mortar is still green. If plaster or pointing is not to be done then the joints should be struck flush.
j) All courses shall be laid truly horizontal and vertical.
k) Suitable toothing or stepping should be provided for subsequent further continuation of brickwork.
l) RCC band shall be placed in ½ brick thick masonry or less as per requirement.
m) Masonry should not be raised more than 1.5 m in a day and all connected brickwork should be raised parallel.
n) For 1 brick wall (9”), maintain one face in line preferably internal face. For higher
thickness wall, both faces should be in line.
o) Buttress, counterforts should be built simultaneously, maintaining proper bond with main wall and not added afterwards.
p) Old or dry surface must be thoroughly cleaned and wetted joints raked out before starting new construction.
q) Curing should be done for minimum 7 days.

 

7. INTERNAL AND EXTERNAL PLASTERING


1. Find out the type of plaster, number of coats, thickness of coats and cement mortar proportion.
2. Select suitable sand for different types of plaster.
3. Use measuring boxes according to the mix proportion and mix on impervious platform.
4. Concrete surface should be hacked with tacha.
5. Thoroughly clean and water the surface to be plastered one day in advance.
6. Service lines like concealed electrical and plumbing lines should be completed and finished flush with masonry surface.
7. Toilets and W. C. of above floor should be checked for water tightness.
8. Practice the dots (thiyas) or screed before plastering to ensure a minimum specified thickness.
9. Fill the khadi maal between the junction of bottom of the beam to the last layer of the masonry, well in advance, before plastering.
10. Fix the chicken mesh of minimum 15cm (6”) in width on either side of the junction of different surfaces (e.g. brick masonry to concrete).
11. Keep 3 to 4 days gap between the 1st coat and 2nd coat for double coat plaster.
12. Finish scaffolding holes properly and immediately.
13. Verticality of window/opening jamb, as well as horizontally of its bottom sills and top to be checked during plastering work.
14. For terrace parapet walls leave the plaster for 40 cm at bottom from terrace slab for waterproofing. For walls, leave the plaster for skirting at bottom from floor slab
depending on height of skirting. Where tile dado is to be fixed, only back coat plaster must be carried out. Leave plaster where sills are to be fixed or where waterproofing is to be carried out in sunken areas.
15. Clean the floor and doors/ windows after plastering work.
16. Cure the plaster for 7 days minimum.
17. Plaster should be checked for its thickness, line, level and plumb.
18. Niroo should be soaked well in advance, if not instant, and should be applied two hours after cement mortar coat application.


8.WATERPROOFING


1) Ensure that all the material used is of a good quality.
2) Ensure that the socketing is done before the base coat work.
3) Ensure that there is no leakage from the bath/W.C. slab once the socketing is done.
4) Ensure that the traps and release pipes are fixed properly before the brick bat coba coat.
5) Ensure that al the brick bats are well soaked in water, before use.
6) Ensure that all brickbats are placed on the edge and not flat.
7) Maintain proper gap between the brickbats.
8) Check the slope of the brickbat coba, towards the trap.
9) Ensure that waterproofing compound is mixed in the mortar, for every stage of work.
10) The topcoat should be carried out in one stroke, without any joints.
11) Ensure proper finishing near traps and spouts.
12) Ensure that the mouth of the release pipe is well tied with piece of chicken mesh and a ghamela of metal is spread over it, for maintaining the porosity.
13) Check each stage for leakage, by flooding it with water.
14) Cure the water proofing without interruption for minimum 7 days.
15) Ensure that 30cm x 30cm (1’0” x 1’0”) squares are marked with line dori on terrace water proofing.
16) Check that waterproofing of the terrace is cured with the ponding method.
17) Ensure that all the joints of traps and W. C. pan are sealed properly before filling the gap with brick bat coba.
18) Ensure that a hole is made in the wall for release pipe and the drainage outlet is water proofed before fixing the pipes.
19) Ensure that vertical water proofing over dado is continued up to a sufficient height.
20) Ensure that wata and drip mould is made immediately the next day and cured properly.
21) Ensure that the rough Shahabad dado is in plumb, for box treatment of waterproofing.
22) Ensure that the gap between vertical wall and Shahabad dado is fully grouted with cement slurry.
23) Ensure that the vertical Shahabad dado is plastered in C. M. 1:4.
24) Ensure that the peripheral area of the basement /underground water tank is refilled with hard, porous material for easy drainage of the rain water/ground water.

 

9.PRE-CONSTRUCTIONAL ANTI-TERMITE TREATMENT


1. Removal of trees, stumps, logs or roots should be carried out prior to the treatment.
2. Sub‐floor area should be kept free from debris.
3. For ensuring uniform distribution of chemical solution and to assist penetration following site preparation should be done:
a) Heavy soils (e.g. Clays) and sloping sites: Surface of the soil should be scarified to a depth of at least 75‐mm.
b) Sandy and porous soils: Preliminary moistening to fill capillary spaces in the soil is recommended.
c) Levelling, Excavations and Filling: All sub‐floors levelling and grading should be completed. All cuttings, trenches and excavations should be completed with back filling in place. Borrowed fill must be free from organic debris and should be well compacted.
d) Concrete formwork: All formwork, levelling pegs, timber off‐cuts and other builder’s debris should be removed from the area to be treated.
4. Water should be mixed with the chemical concentrate in specified quantities and the solution should be applied as per as per IS: 6313 (Part II)‐1981.


10. ROAD WORK


a) WBM Sub‐Grade
i) The entire width of road surface must be cleaned of all bushes, trees and loose material.
ii) The sub grade must be prepared by box cutting to required depth with required camber, sub‐grade dressing and rolling.
iii) Due allowance must be considered for compaction of sub grade.
iv) Ensure that minimum 30cms berm is kept on either side in embankment and slopes are trimmed and dressed to designed slope.
v) Necessary drainage arrangements must be made before completing the embankment rolling.
vi) Different types of soil, murrum/kankar or soft rock strata must be segregated & stacked suitably for reuse.
vii)Ensure that the required machinery like rollers, rammers, and compacting equipments are brought on site.
viii) Ensure that the rubble of specified size and quality are brought on site from approved quarry.
ix) Soling must be laid in the required cross section and depth, so that the required thickness is achieved after consolidation.
x) Check that the rubble is hand packed closely bedded firmly and interstices are filled by quarry spalls/hand broken metal.
xi) The dry rolling must be carried out by 8‐10 ton roller by spreading approved
quality of murrum. Water sprinkling is adequately done before starting wet rolling to form water bound macadam.
xii)Rolling must commence from edges, proceeding towards the centre by over lapping half the roller width.


b) WBM

i) Check that the sub grade from WBM is in specified grade and camber.
ii) Check that 2.5 cm thick layer of screening is spread on sub grade before laying coarse aggregates.
iii) Ensure that metal aggregates is laid in required thickness and bonded with binding materials murrum / screenings.
iv) Check whether the top of WBM surface is true to the line, grade and cross section.
v) Check whether the binding material is of required plasticity, gritty and creates good bond between the metal surfaces.
vi) The dry rolling must be carried out by 8‐10 tonne roller by spreading approve
quality of murrum. Water sprinkling is adequately done before starting wet rolling to form water bound macadam.
vii)Ensure that the roller moves from edges proceeding towards centre by uniform lapping one half width and slight water sprinkling is done.
viii) Ensure that the screenings are spread at slow & uniform rate in the required quantities when the rolling is in progress. The settle in voids of coarse aggregates.
ix) Ensure that sprinkling, sweeping and rolling operations are continued until coarse aggregates are thoroughly keyed, well‐bonded and firmly set in to for water bound macadam.
x) Ensure to apply water to the wheels of roller to wash down the binding material sticking to them.
xi) The top finished surface is required to be checked and confirmed transversely ad longitudinally with camber templates.

 

 

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