Specification of Road Work upto Grouting Level - Ahmedabad ...

AHMEDABAD MUNICIPAL CORPORATION - ENGINEERING DEPARTMENT
SPECIFICATIONS OF ROAD WORK UP TO GROUTING LEVEL
This section gives detail specifications for mainly used materials, for other materials refer Building
Specifications.
For materials relevant IS code shall apply.
TECHNICAL SPECIFICATIONS
Item No.01 : Box cutting the road surface in all sorts of soil, murrum to proper lope & camber
for making a base for road work including removing the excavated stuff & depositing on the
road side as directed up to 50.00 mt. Lead.
Any soil which generally yields to the application of pickaxes and shovels, spades, rakes or any
such ordinary excavating implement or organic soil, gravel, silt, sand turf loam, clay, peat etc. falls
under this category. For materials and workmanship for earthwork and excavation, relevant
specification IS: 3764 & IS 1200 (Part I) shall be followed.
To protect persons from injury and to avoid damage to property, adequate barricades, construction
signs, red lanterns and guards as required shall be placed and maintained during the progress of the
construction work and until it is safe for the traffic to use the roadways. The relevant Indian standards
and the rules and regulations of local authorities in regards to safety provisions shall be observed.
The depth of the excavation shall be as required. The site shall be cleared and all obstructions, loose
stones, materials and rubbish of all kind, bush; wood and all type trees shall be removed, as directed.
The materials so obtained shall be the property of AMC and shall be conveyed and stacked as
directed, within 50-m. lead. The roots of the trees coming in the sides of the trenches shall be cut and
coated with hot Bitumen.
All types of trees, woods etc. which requires prior permission of Govt./ Forest Authority / Municipal
Commissioner, before cutting shall be cut after obtaining such permission from them. The rate of site
clearance is deemed to be included in the rate of earthwork.
The excavation shall be carried out in true line and level and having width and depth, as shown in the
drawings or as directed. The Contractor shall do the necessary shoring and strutting or shall provide
necessary slopes to a safe angle or steps, as required or directed, at his own cost. No extra payment
shall be made for such precautionary measures, taken. The bottom of the excavated area shall be
leveled both longitudinally and transversely, as directed, by removing excess soil and watering, as
required. No earth filling will be allowed for bringing it to level, if by mistake or any other reason,
excavation is made deeper or wider than shown on the drawings or as directed. The extra depth or
width shall be made up with sand filling, as specified for the bottom level of the subsequent finishing
at the cost of the Contractor or as directed by Engineer-In-Charge.
The Contractor shall at his own expense and without extra charge make provision of supporting all
utility services, lighting the excavated areas, separating and stacking serviceable materials neatly,
shoring, timbering, strutting, bailing out water either sub-soil or rainwater, including pumping at any
stage of the work. Excavated areas shall be kept free of water while masonry or concrete or relevant
base works are in progress and till the Engineer-in-charge considers it necessary. Contractor shall
have to take levels before and after excavation. Contractor shall have to provide level and
leveling staff and shall take levels with his own engineers in presence of AMC staff.
Measurement shall be given by level results.
Disposal of the Excavated Stuff:
The excavated stuff of the selected type shall be used in backfilling the excavated areas wherever
required in layers, including ramming and watering, ensuring proper compaction etc. complete up to
lead of 50mt. The Contractor shall remove the balance of the excavated quantity from the site of
work, to a place, as directed by engineer in charge. The lead is the shortest practical route and not
necessarily the route actually taken. The decision of Engineer-In-charge shall be final in this regard.
The measurement of excavation of excavated area shall be made according to the sections shown on
the drawing or as per sections given by the Engineer-in-charge. The rate shall include for clearing the
site, surface dressing, and making layout for road.
The rate shall be for a unit of one Cubic meter.
Item No. 02: Conveyance charge for surplus excavated earth, lime, murrum, building rubbish,
manure, garbage, sludge, excavated rock, fly ash, aggregates of any kind including spreading &
leveling etc. complete. (iii) Lead up to 3 Km.
All the surplus earth/excavated material etc. shall be carried away immediately from the site of work
to a place within distance specified in the relevant item or as directed and ordered by the Engineer, so
as not to cause any inconvenience to the public traffic. If the instructions are not complied within 7

days from the date of order to cart the surplus materials and clear the site, the said work shall be
carried out by the Municipal Corporation at the risk and cost of the contractor and no claim or dispute
shall be entertained in this respect.
The rate of carting including carting of brick bats, metal, rubble vegetable and garbage, if necessary to
clear the road surface.
Carting of payment shall be given as per excavation without any bulkage.
The rate shall be for a unit of one cubic meter.
Item No.03 : Supplying of graded hand broken stone aggregate of 90 to 127 mm size at site
(Spouls)
The stone for rubble soling to be supplied by the contractor and shall be of good quality and size 90
mm to 127 mm. The stone shall be quarried and shall be sound, angular, durable and free form flaws
and decay and shall be approved by the Engineer in charge. The material shall conform to standard
tests as required by AMC.
The stone shall be stacked on neat and uniform ground at roadsides, stack shall be of the regular/
geometric shape, and stack shall be measured in volume. The material shall be stacked in such a way
that there shall be minimum voids. The rate includes quarrying blasting, hand breaking collection
transporting, to the site and stacking in measurable stacks at site. Inferior quality of material brought
on site shall be immediately removed from the site without any extra cost. The rubble or spouls shall
be spread after measurements are recorded and orders are obtained from the Engineer in charge.
Mode of Payment
The rate shall be paid on cubic meter basis.
Item No.04 : Labour charges for spreading the spouls 127 mm thickness Layer earth filling
correcting the grade and camber comp. with watering, rolling, including preparing the surface
by brushing for removing all loose or dirt etc. completed.
The item relates to labour work of soling. The spouls stacked at any lead from the filling area should
be used good earth obtained from outside only after Engineer in charge approved. The spouls shall be
sorted out from stacks. Extra earth, debris, shall be removed and the spouls shall be placed in position
over the earth level formed to give a suitable soling formation by packing voids, no hollow space is
left. The soling shall be filled up with the same material of finer size, interlock the small cavities
between the soling and the whole soiling shall be made a compact, solid and continues level which
shall not be disturbed while rolling. The entire surface shall be well watered and rolled with a heavy
roller weight not less than 8 ton capacity as directed by engineer in charge. The gaps formed shall be
packed again by the same process. Spouls shall be laid on herringbone bond to required grade and
camber. Contractor shall provide required number of labour at time of rolling to rectify undulation
and depression without any extra payment. The contractor shall have to prepare the surface true in
accordance to camber & gradient of the road. If any extra depth of soling is required in the process
that will not be paid for separately.
The measurement will be on square meter basis of the actual area of soling surface prepared.
Item No.05 : Supply of graded machine cut black trap stone aggregate of Sevaliya/Timba or
equivalent quality. Metal of size 25 mm to 40 mm.
The Aggregates shall consist of Black trap machine crushed stone only, obtained from quarries
situated in Sevaliya /Timba or equivalent. It shall remain visibly black on immersion in water. They
shall be clean, strong, durable of fairly cubical shape and free from disintegrated pieces, organic or
other deleterious matters and adherent coating. They shall be free from elongated and flaky piece also.
The size of the aggregate shall be as per standard required by AMC .
For stacking relevant Specification of Item No. A-3 shall be apply.
The rate shall be paid on cubic meter basis.
Item No.06 : Labour work for spreading the metal in total 100mm th. in two uniform layers
each of 50 mm thick, including providing and applying bitumen for semi grouting 1.5 kg/sq.mt.
for each layer (in both layer) & providing and spreading the key black trap aggregate of
Sevaliya/Timba or equivalent quality on top (second) layer at the rate of 0.013 cmt per sq.mt. of
size 18 mm passing & 9.5 mm retained. Rolling with 10 T.roller etc. complete as directed.
The metal shall be screened of any rubbish, dust or grass. Then metal shall be laid uniformly in two
layers of 50 mm each, to the required grade and camber as directed by the Engineer in charge. Laying
of metal shall be started after the consolidating soling layers prepared perfectly to the proper line level
and camber. Where camber of soling is found doubtful it shall be corrected prior to spreading metal.
Metal filled in the basket shall be spread evenly in required number of layers as directed. Metal shall
be spread in proper grade and camber if required using camber boards, so as to ensure the corrected

surface. The surface shall be checked at every 15 mts. by means of template and string for correctness
of the camber. The consolidation of metal shall be done by the contractor with a minimum 8 to 10 T
roller. The contractor shall provide required number of labors at the time of rolling to rectify the
undulation that might have occurred during rolling. To carryout grouting of the above said 50 mm
thick metalling coat the contractor shall bring all the required equipment and materials as directed.
Bitumen of 80/100 grade penetration of approved quality heated to a temperature of about 150 C. and
shall be applied hot by means of a sprayer uniformly over the surface at the rate of 1.5 kg./sq. mt. up
to the satisfaction of Engineer in charge. Immediately following the application of bitumen and while
it is still hot second layer of metal shall be spread in proper thickness and again application of
bitumen at the rate of 1.5 kg./sq. mt. as above for second layer shall be done. Key aggregate of as
specified in below table and of approved quality shall be evenly spread out at rate of 0.013 cum. per
sq. mt. After spreading the chipping the whole area shall be rolled over thoroughly with a 8 T to 10 T.
roller It is important that the rolling should be done while the bitumen is still soft and it should be
continued until the road sets and there is no settlement under the roller.
During the period between the initial compaction of coarse aggregate and compaction
of the surface course shall be protected form all traffic other than essential to its construction, till the
final compaction level is attained. All above operation shall be carried by the contractor using his
equipments and material including fuel or wood required for burning etc. and as directed up to the
entire satisfaction of Engineer in charge . Vehicles tube tire burning shall not be allowed.
As shown in the TABLE-500-7
I.S. Sieve (mm) Per cent by weight passing the sieve
Key Aggregate
53
26.5
22.4 100
13.2 40-75
5.6 0-20
2.8 0-5