8. FINISHING
WORKS
8.1 Scope of work
8.2.1 materials
8.2.1.1 Juss
Juss shall be locally
produced natural gypsup in iraq, and shall be fresh, completely
dry and well ground material and shall not leave residuals
on 56 mesh/cm sieve, and shall
be free from extraneous Which
may be affected by spontaneous slating. Juss shall be kept in adry area, covered and protected from moisture, juss shall be the
best grade obtainble from an approved
source and completing with relevant Iraqi standards.
8.2.1.2 Sand
Sand for finish coats shall be clean and well graded from coarse fine as specified
in concrete work
8.2.1.3 Cement
Cement shall be specified in section 4-2-1
(concrete work)
8.2.2 Plastering accessories
All plastering accessories shall be approved on samples by the Engineer
before starting plastering work. Such accessories, including corner beads, casing
beads, lath and other saterials, shall be used where and necessary for workmanlike
plastering work.
8.2.3.1 Working
environment
maintain uniform ventilation and a temperature of not lower
than 5C until
plastered surface are dry.
Excessively rapid drying shall be prevented.
8.2.3.2 Surface
preparation
Dust, Oil, grease and other
undesirable substances that might hinder the forming of a good bond
with plaster bases on concrete
or
masonry
shall
be
removed
immediately prior to plastering.
8.2.3.3 Moistening underbed
Immediately
before applying plastering work, brick and concrete
surfaces shall be wet-down sufficiently to reduce suction but shall not be
excessively wet.
8.2.4 Application
All plastering shall be executed
in a workmanlike manner leaving all finished plaster surfaces free from waves or imperfections.
8.2.4.1 Nixing
Plaster materials shall be thoroughly mixed with the correct amount of water,
in accordance with the specific requirements
of the vorh,
8.2.4.2 Number of coatings
porotland cement
plaster on walls
a. First coat : 1 part portland
cement, 2.5 parts sand by volume.
b. Finish coat : 1 part portland
cement, 3 parts sand by volume.
8.2.4.4 Grouting
permeiers of door and window frames,
pipes and ducts shall be grouted with cement
mortar of part of cement and 3 parts sand by volume.
8.2.5 Juss Plaster
Juss plaster
shall be mixed
and applied in accordance with local practice
. Juss plaster shall be plastered
in 2 coats, each coast shall
not exceed 15mm thickness.
Metal lath shall be used at all corners and angles and stops.
8.2.6 Cement mortar plastering
All plastering
shall be done in two coats. The first coat shall be applied as thinly as possible and in a manner
obtaining plan faces, with all angles arrises and reveals
perfectly plumb and square. This coat should be well scratched
to provide a key for the
final coat. After completion, the plaster shall
be cured for at least 24 hours by being continuously wet.
8.3 Terrazzo
8.3.1 Materials
The terrazzo
tile shall be machine made tile, composed
of natural aggregate of potland cement and marble chips, formed by hydraulic press. Terrazzo floor tile shall be
300*300*25mm thick and of selected
colour and pattern and it shall be complete
with all necessary special shapes and corners.
Cement motar for setting the floor tile shall be approximately 25mm thick and shall be composed of 1 part Portland cement and 3 parts sand by volum. Grout for terrazzo tile floor joint consist
of 1 part white cement and 2 parts clean sharp sand by volume and the width shall be 5mm .
8.3.2 Installation
The concrete
floor shall be dry, firm, clean, free of grease
or wax, proper adhesion
shall" ber assured between
the mortar and all tiles and the finished floor surfaces
shall be smooth.
Joints shall be arranged
at regular intervals
with due consideration to the axis of the room,
joint filling shall be executed
so as not to leave
any unfavorable space
. All joints shall
be closed joints. No traffic of any kind or any shook shall
be permitted during the 48 hours following installation of the tiles. Mortar and grout on the tile
surfaces shall be cleaned away. Tiles that are cracked or show broken corners shall be removed and replaced with sound
tiles at the contractor's expense.
8.4.1.1 Cement
Portland cement shall be type 1, white cement shall be used for the surface layer of
the terrazzo, the balance of the balance
of the cement shall be gray colored.
8.4.1.2 aggregate
marble aggregates shall be crushed marble,
hard and round, not flaky, free from dust or other impurities.
sizes of marble
aggregates shall be as follows .
i. All particles shall pass through a 24mm sieve
ii. 40% to 60%
of the particles shall pass through
a 12mm sieve. iii. No
particle shall pass through a 6mm sieve
Dividing strip or edging strips shall be of brass not less than 4.5mm thick and 12mm high. Brass shall conform with DS
2o74 or Other equivalent standards.
8.4.1.4 Pig ment shall be a lime - proof, non – fading mineral pigment the same as
the pigment used in Engineer
approved samples and shall comply with BS 1014 or other
equivalent standards.
8.4.2 Workmanship
8.4.2.1 Working environment
i. In case of cold weather
all precaution shall be exercised
to avoid adverse weather, such as ambient
temperature below 48 .
ii. In case of hot weather, ensure that full compaction is not premature
stiffening or drying out of mix after compaction,
not prevent excessively quick drying
out.
iii. In case of wet weather,
protect terrazzo work from rain or snow.
8.4.2.2. Surface
preparation
surface to reseive
terrazzo shall be thoroughly cleaned free from dust, dirt , oil and other
deleterious items.
8.4.2.3 13ond Breaker
polyethylene sheet having a minimum 0.08mm thickness with minimum
lapping
150mm shall be
laid for separation over
entiere underbed surfaces
8.4.2.4 Dividing or edging strips
Dividing or edging brass
strips shall be fixed in a minimum
7000x7000mm grid with metal anchor and mortar
according to layout plans,
underneath each brass
strip, a wooden dividing
strip shall be added to complete the joining.
8.4.2.5 unbonded cement screed
8.5 Flooring of marble and Granite
All marbles
and granites must be carefully
selected from the best guarry
beds, and utmost care must
be exercised to ensure that the maximum amount
of adjacent marble matches accurately. All stone shall be free from cracks, holes, scratches
and other blemishes. No stooping will be allowed.
All stones shall be free from cracks, holes, scratches and other blemishes. All stones shall be of the highest quality, durable
with resistance to atmospheric agents and
shall pass, all the strength
test ( Compressive strength ) and shall
have adequate tensile
strength.
The contractor
will be required immediately to produce representative samples of all the stones intended
to be supplied for the employer's representative's approval, and the whole of the supply shall correspond with the approved samples.
No other quality of stone will be accepted
and the contractor will be required
to guarantee that the
qualities will comply in all respect with specification
and the samples approved
by the employer's
representative.
Mocked up sample panels of stone
work to indicate the range of color and texture . matching of vein,
workmanship, etc. shall also presented for the approval
of the Employer's
representative.
All stonework
is to be accurately worked,
deadsquare and ture and accurately placed in the definite position with due respect
to levels, alignments and verticality and perfectly jointed and fitted against adjoining
members . All visible edges will have to
be rectified
and
gauged
with
a
maximum
tolerance
of
0,5mm
on
the
gauging
thickness ( and shall be finished to the same degree
of that of adjoining finished surfaces of trfcone). And + ;-1.5mm in the thickness of slab in general. The tolerance
allowed in the cut of the slab, for out of joint
and precision of size and squareness
shall not exceed 0.5m per 500mm.
All Exposed
faces of marble are to be finished
to the degree indicated on drawings
and described thereon. The whole of the work will be inspected
at the factory during working and upon arrival at the site and the Employer's representative will reject any
material or workmanship which does not conform
to the conditions and will require
replacment to be made at
the contractor's expense.
8.6 Quarry tiles
Quarry tile shall be unglazed
semi - vitreous tile made
from natural clay conforming to BS 1236 or other relevent
standards in terms of water
absorption, resistance to abrasion and chemical attack, flexural
strength and so forth.
8.7.1 Description of work
Furnish and install Sportflooring and accessories as specified herein, shown
on the drawings, and retired
by the Engineer.
8.7.2 Quality Assurance
a. Supplier shall be an established firm, experienced
in the field.
b. The installer shall have completed
at least three projects of similar magnitude and complexity,
c. Level flooring
to s
tolerance of + ;- 3 mm from the true plane
8.7.3 Submittals
a. Submit
manufacturer's recommendations for the correct preperation,
finishing
and testing of concrete subfloor surface to recieve
the sportflooring.
b. Submit manufacturer's specifications for installation handling, protection A
njaintance.
c. Submit 3 sets of samples
of each type, color, and finish of flooring and accessory
required. Sample submittals will be reviewed for color, texture and pattern only .
8.7.4 Delivery, storage
and Handling
protect flooring
materials and accessories from any kind of damages during delivery, storage and handling . store in a dry place with adequate
air circulation . Do not deliver flooring materials to building until all masonry,
painting , plastering, tile work, overhead
mechanical work, and lighting are completed.
8.7.5 Job conditions
a. Keep
the
areas
which
receive
flooring
to
the
temperature
rerjuirod
by
the
manufacturer's instructions for at least 48 hours prior to installation.
Maintain this temperature during
and after installation as recommended by flooring
manufacturer,
b. Do not install floor system until concrete has been cured for (30) days and other retirements are obtained as
specified.
8.7.6 Materials
8.7.6.1 General
a. Uniform in thickness and size.
b. Edges cut
accurately and square. c. Uniform color.
8.7.6.2 Sport flooring Materials
Shall be mond oflex or indoor flex or any other
equal
quality
approved
by
the
abrasion resistance ---- excellent, resistance to cigarette ---- burns
sound isolation ---- maximum acoustic absorption.
8.7.6.3 Adhesives
materials as recommended by the flooring
manufacturer to suit flooring materials and substrate
conditions. No substitutions.
8.7.6.4 Gome line paint shall be compatible with the floor finish surface
and the same color required by
the gane and as approved by the Engineer.
8.7.7 Execution
8.7.7.1 inspection
Examine the areas and conditions under
which the flooring
work is shown
to be installed and remedy any conditions detrimental to the proper and timely completion
of the work.
Do not proceed
with the work until unsatisfactory conditions have been corrected in a
manner acceptable for installation.
8.7.7.2 Preparation
Prior to laying flooring , broom, clean or vacuum surfaces to be covered and inspect
sub floor. Use leveling compound
as recommended by the flooring
manufacturer for filling small
cracks
and
depressions
in
sub
floors.
Start
of
flooring
installation
indicates acceptance of sub floor
conditions an and full responsibility for completed work,
8.7.7.3 Installation
and finishing
a. Flooring surface
1. Unroll, perfectly fit, cut and leave unrolled to relax.
2. esive materials
according to manufacturers directions. Use 3nim notched troxtfel to
spread adhesive. Bo not soil walls or adjacent areas with adhesives .
3. Unroll into freshly applied adfacsinrov.
End seams shall
be single cut, edge seams overlapped, then snapped into place to insure tight seam, The flooring shall
be lid tight, even and straight,
4. Roll the
entire sport surface with mediur-size rokker to remove any entrapped air. Wipe away any adhesive that oozes between size.
5. All seams shall be weighted in place.
Leave weight in place a minimum of twelve(l2) hours.
b. Game line painting shall be done as specified
by
the
manufacturer
of
the
sportflooring.
c. Finishing
shall be in accordance with manufacturer current procedure, using approved materials.
d. After sportflooring surface is installed
and game lines painted , area is to be kept
locked by contractor to allow curing time for paint and adhesive.
No other trades are
to be allowed on the floor until it is accepted by the Ehgineer.
e. Clean up all unused materials and debris
and remove same from the premises.
8.8 Ceramic tile
8.8.1 Materials
Glazed ceramic wall tile shall be square edge, matte finish,
glazed natural clay tile . Tile shall be free from defects which affect appearance or serviceability , will not be
acceptable.
Tile shall be free from a dark spots
over 0-16mm ( interior or 0.3mm exterior) in diameter, fractures in the glaze, heavy
accumulations of glaze
, spots in sufficiently
glazed , frosted crystalline appearance and rough spots,
ceramic tile shall
be first quality, size the
drawing.
8.8.2 Installation
a. Apply setting beds for tile directly to moistened concrete,
concrete block, Portland cement plaster other bases,
setting beds shall be composed
by volume of one part Portland cement, to one half
part hydrated
lime to four parts dry sand, mixed
with minimum amount of water necessary
to produce a workable mass. Apply in sufficient
quantity and with sufficient pressure
to cover well the entire
area and form a good key. Bring out flush with temporary
screeds or guide strips so placed
as to give a true,
earen surface at the proper distance from the finished
face of tile. Setting beds shall not less than 1.25cm nor more than 1- 9cm thick.
b. Joints shall be straight, level, perpendicular, and of even width. Vertical joints shall be maintained plumb for the entire height of the tile work. Tile where called for on the
drawings shall have staggered joints as shown.
Each tile shall be brought to a true level plane surface by uniformly applied pressure
under a straightedge , Tiles that are improperly
placed shall be removed and reset.
Damaged or defective tilfe shall be replaced.
c. Iteflor setting, tile shall be throughly soaked in clean water and drained so that no free moisture remains on the back of tile . Wall tile shall be set by trowelling1 a skin
coat of neat portland cement on the setting bed or by applying a skin coat to the back
of each tile unit and immediately floating
the tile in to place. All tile special
shapes, and trim pieces shall
be solidly backed with mortar.
d. Grouting
: Immediately after a suitable area of tile has set, grout joints
full with plastic mix of
neat, white
Portland cement. If desired,
the contractor my add fine, white grouting sand up to an amount
ecfuall in volume to the portland cement.
e. Cleaning : After grout is throughly set, sponge and wash tile throughly, diagonally a-'cross joints, and polish with
clean, dry cloths.
Acid cleaners not allowed.
f. Curing
: Keep joints continuously damp for a period of at least
72 hours after applying grout.
8.9 Glazed tile
8.9.1 Material
Glazed wall tile shall be used for; the interior surfaces of toilets, and be scjuare
in shape of 150z150ram and
white colour.
8.9.2 Installation
The Installation of glazed tile shall be
accordance with section (8-8-2)
8.10 Suspended
Ceilings
The Mechanical
suspension system should be of an approved type. The suspension
system should be of type that will be installed
by direct suspension
from the structural ceiling by hangers. Hangers
should be at interirvals as shown on drawing and. they
should be not smaller than 10mm mild
steel rods.
All steel members of the suspension system
should be painted .
The mechanical suspension system should be of an approved
exposed grid system
The exposed suspension member
shall be in width and installed as shown on the
drawings.
The suspended
ceilings shall be made of ribbed metal lath designed for interior one
side plastering. The metal
lath should have an approved pattern
and should be of
email mesh that ensure good bend with the plaster
and should be rigid and do not show any signs of sagging or bending
when the
plaster is applied . Metal lath sheets should be lapped sufficiently. Prior to plastering the metal lath the whole surface of the lath should be treated with (1:1) cement sand slurry to form a complete coat under plaster,
Whomever " Tile suspended ceiling" or " Acoustic Tile suspended
ceiling"
are
specified on Drawings.or in the Bill
of
Quantities then the tiles that shall be ased should
be Termiteproof, Rot proof,
odourless, durable, not sustaining vermin
and of type approved by the
Engineer,
prior to delivery tile samples
shciild
The method of fixing the suspenecl
ceilings should be according to the requirements of this specification and as shown on the drawings
that will be furnished by the
contractor with his bid.
8.11 Painting
work
8.11.1 Description of work
This specification section covers
the
surface
preparation,
material,
manufacture,
delivery and application of painting.
All paints
shall
be
of
the
first
quality and/or standard products
of
reputable
manufacturers.
8.11.2 Surface
preparation
a. Surface
preparation for concrete, mortar and plaster
unless otherwise specifically instructed in the specifications, the following procedures for preparation shall be
adopted.
i. Surface shall be sufficiently dried before painting
ii. Dirt, dust and foreign matter shall be removed with
care not to damage the surface.
iii, interior mortar and plaster surfaces shall first be painted with emulsion sealer and
then putty shall be applied to remedy the irregularities of surfaces, such as hair cracks, minuteholes, etc. and immediately after application, excessive
putty shall be skimmed off with a wooden or iron spatula, when the putty rdries, the
puttied surfaces shall be sanded with samdpaper prior to a paint application
IV. Exterior
mortar surfaces shall first receive cement . filler or the like with "brush or their hair cracks minute holes, etc. Then the remedied
surfaces shall be sanded with sandpaper followed by applications of solvent 'based
sealer or that approved by the
Engineer
V. Regarding the exterior
concrete,
major
irregularities
of
the
surfaces
shall
be
corrected by filling the crevices, holes,
etc. with cement filler or the like. The filler shall be applied with wooden or iron spatula as smoothly as possible.
When the filler dries,solvent based sealer
or that approved by the Engineer shall
be applied before painting.
b. Surface preparation
for wood
i, Wooden naps, dirt and. foreign
matier shall be removed by sandpaper with care
hot to be damage the material.
ii. Gum shall be burnt by an electric
heating rcui or pared with wiped off with
solvents.
iii. Knots shall
.then fre sealed with" two coats of shellac varnish.
Vi. In order to ensure smooth surfaces , all surfaces
puttied and once filled with polishing powder shall be sanded with
sandpaper.
c. Surface
preparation for steel.
i. Oil and grease shall be wiped off with solvents,
ii.
After blasting or cleaning with a power tool, dust on the surface shall be blown off
with an air-blower.
d. Surface
preparation for galvanized
iron.
i. Oil and grease shall be wiped off with solvent. ii. White rust shall be sanded off with sandpaper.
8.11.3 Materials
paints shall be factory manufactured and delivered
to the job in unbroken container's
which shall show the designated name. formula, color, Manufacturer's directions and name of manufacturer, all of which shall be planinty
legible at the time of the use, the
following paints, which conform to B.S specifications
or their equivalent shall be used,
a. Oil paint ( on o/ood and metal surfaces) oil paint shall stand for long oil base alkyd paint for undercoat and finish coat conforming to
B,S 2524 or equivalent standards,
b.
Gloss emulsion paint ( on interior walls) Gloss emulsion
paint shall stand for
comparatively gloss rich vinyl emulsion paint.
c. Oil stain
clear lacquer ( on wood )
Oil stain cleat lacquer shall stand for acrylic resin type clear lacquer finish combined
with colour.
d. Polyurethane clear lacquer ( on wood )
Polyurethane clear lacquer shall stand for Polyurethane easine
type clear lacquer finish combined with colour
toner.
9.11.4 General
rules
a. Inflammable
paints shall be in an independent, idolated and well ventilated place and sheltered avoiding direct
sunlight.
b. panting places shall be ensured of good ventilation to avoid poisoning
by solvents as well as
prevent to afire.
c. Special attention shall paid to the preventing of fire.
Hazards fire shall be kept off from the painting places and paint stores
to prevent occurrences of explosion, fire, ect, clothsand
/ or rugs used for wiping or soaked
with paint
may
have
a
danger
of
spontancous
combustion,
therefore,
such
materials shall be immedlately disposed of.
d. Painting work shall be suspended under
the following circumstances:
ii. During snow, rain, strong wind or days expected of such weather conditions. iii. Untidy conditions of work where good work cannot be expected.
V. Painted
surfaces can be damaged or hindered
by other works.
Vi. Ventilation is not sufficient
enough
that
proper
drying
og
paint
can
be
ensured.
e.
The proper application method shall be employed to meet nature of the paint, and
paint applications shall
be done evenly
so as not to leave blemishes, saggings runnings, wrinkles, bubbles, ect.
f. paint for finish
coating shall be, as arule, prepared
for special color and luster effects which shall be subject to approval of the Engineer.
Color sample, color plates, ect, shall
be submitted to him.
g. Paint shall be delivered to the
site sealed.
h. Paint shall be in general,
used as it is, however
depending on the roughness / fineness of the surface,
degree of absorption, atmospheric temperature, ect, it may be adjusted by use of thinner or solvent to ensure proper painting.
i. Painted
surfaces shall be well protected from n contamination and damage until they are thoroughly dry and floors and other surfaces adgacent
to areas to be
painted shall be properly or protected otherwise
from stains before painting work
.commences
j. After blast or power tool cleaning of steel surfaces,
primer shall be applied as soon
as possible in order to avoid growth
of rust.
k. Manufacturer's instructions shall be strictly observed
to ensure proper
and good painting work.
Terima kasih infonya gan.
ReplyDeleteLumayan buat nambah elmu.
Finishing Floor Hardener
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