Technical Specification for Vitrified tiles & Green Marble Stone Flooring
Providing and fixing 60 x 60 cm Vitrified tiles 10 mm thick in flooring, dark colour combination pattern coloured and shade approved by Engineer in charge over 20 mm (average) thick base of cement mortar 1:6 (1 cement : 6 coarse sand) and laid over and jointed with white cement slurry including finishing with flush pointing and cleaning the surface etc. complete.
Materials
- Water shall conform to M-1. Cement mortar shall conform to M-11. 60 x 60 cm vitrified tiles 10 mm thick shall conform to relevant Indian standard. The size & colour of vitrified tiles shall be approved by Engineer in charge. Tile shall be of anti-skid type as approved.
Bedding
- The sub grade shall be cleaned, witted and mopped. The bedding shall then be laid evenly over the surface tamped and corrected to desired level and allowed to harden enough to offer a rigid cushion to tiles and to enable the mason to place wooden planks across and squat on it.
- The vitrified flooring tiles shall be of cement mortar 1:6 (1 cement : 6 coarse sand) or L.M. 1:1.5 of average thickness 20 mm given in the description of the item.. The mortar shall have sufficient plasticity for laying and there shall be no hard lumps that would interfere with the evenness of bedding. The base shall be cleared and well witted. The mortar shall then be spread in thickness not less than 10 mm. at any place and average 12 mm thickness. The proportion of the cement mortar shall be as specified in the item.
Fixing tiles
- The tiles before laying shall be soaked in water for at least two hours. Neat gray cement grout at 33 kg/ Cement/Sq.mt. of honey like consistency shall be spread over the mortar bedding as directed. The edges of the tiles shall be smeared with neat cement slurry. The tiles shall be well pressed and gently tapped with a wooden mallet till they are properly bedded and in level with the adjoining tiles. There shall be no hollows in bed or joints. The joints between the tiles shall be as thin as possible in straight line or as per pattern.
- The tiles shall not have staggered joints. The joints shall be true to center line both ways. The Nahni trap coming in the flooring shall be so positioned that its grating shall replace only one tile as far as possible. Where full size tiles cannot be fixed they shall be cut (Swan) to the required size and the edges rubbed smooth to ensure straight and true joints. The joints shall be filled with grey cement grout with wire brush or trowel to a depth of 5 mm. and loose material removed. White cement shall be used for pointing the joints. After fixing the tiles finally in an even plane the flooring shall be kept wet and allowed to nature undisturbed for 7 days. The pattern shall be approved by Engineer in charge.Cleaning
- The surplus cement grout that may have come out of the joints shall be cleaned off before it sets. Once the floor has set, it shall be carefully washed, cleared by dilute acid and dried. Proper precautions and measures shall be taken to ensure that the tiles are not damaged in any way till the completion of the construction.
Mode of measurements & payment
- The work done shall be measured in sq.mt. for visible area of work done. The length and width of the flooring shall be measured not between the faces of skirting or dedo or plastered face of wall as the case may be. The paving under dedo or skirting shall not be measured. No deduction shall be made not extra paid for any opening in the floor of area up to 0.1 sq.mt. Nothing extra shall be paid for laying the floors at different levels in the same rooms.
- The rate shall be for a unit of one sq. meter.
Providing and laying single piece machine
cut free edges with half round nosing mirror polished green marble stone slab
finished treads and risers in single piece colour and shade approved by this
office, flooring over 20 mm (average) thick base of cement mortar 1:6 (1 cement
: 6 coarse sand) and jointed with cement slurry including making 3 nos. of 3 mm
wide and deep groove along length of tread etc. complete. 25 mm thick.
GENERAL
- This work shall consist of providing
and laying single piece machine cut free edges with half round nosing mirror
polished green marble stone slab 25 mm thick of the shape and dimensions shown on the drawings
and conforming to these Specifications or as
approved by the Engineer in charge.
MATERIAL
- Water shall confirm to M-1. Cement Mortar
shall confirm to M-11. Marble shall confirm to M-51. Sand shall conform to M-6.
MARBLE STONE SLAB
- Marble stone slab shall be hard even sound, and regular in shape
and generally uniform in colour. The colour
of the stone shall generally be green. Only approved coloured shall not be
allowed for use. They shall be without any soft veins cranks of flaws Marble stone
slab shall be hard, even, and regular in shape and it should without fault.
- The size
of the Marble stone slab to be
used for
flooring shall be of size 600
mm x 600
mm size or as
approved by Engineer in charge
or Architect. However smaller sizes will
be allowed to be used to the extent
of maintaining required
pattern. Thickness shall be as specified. For treads and risers the marble
stone slab shall be in single piece.
- Tolerance of minus 30 mm. on accounts of
chisel dressing of edges shall be
permitted for length as well as breadth. Tolerance in
thickness shall be +3 mm.
- The edges of Marble stone slab shall be truly chiseled and table rubbed with coarse sand before
paving. All angles and edges of the stones of shall be true, square and free chipping and surface shall be true and plain.
- The Marble stone slab shall have machine
cut free edges with half
round pipe molding mirror polished surface. When brought on site. The stones
to be used for Flooring dedo, skirting, sink,
veneering, sills, steps, etc.
WORKMANSHIP
- Marble stone slab shall be of approved quality
shall be laid evenly to level
and slope as directed by
Engineer in charge over a
bed of a base layer consisting of cement mortar
1:6 (1 cement : 6 coarse sand by volume) or Lime Mortar 1:1.5 (1 lime : 1.5
lime putty by volume)
- Marble stone slab shall be laid evenly as per detailed drawing or as directed by Engineer in charge. Width,
length and shape of stone shall be as per pattern shown in detailed drawing.
- Cement and sand for base layer shall be
mixed in proportions of 1:6 (1 cement : 6 coarse sand by volume) Cement and sand shall be
proportioned by volume after making due allowance for bulking. The require quantity of water shall
then be added and the mortar mixed to produce workable consistency before mixing platform shall be thoroughly cleaned
before changing from one type
of cement to another.
- The mixing for base
layer shall be done intimately.
The operation shall be
carried out on clean water tight platform,
and cement sand shall be first mixed dry in the required proportion to obtain
uniform colour and then the mortar shall be mixed for at least two minutes after addition of water. In case of cement mortar, that has
suffered because of evaporation of water the same shall be re-tempered by
adding water as frequently as needed to restore
the requisite
consistency but its re-tempering shall be permitted only within thirty minute
from the time of addition to water at the time of initial mixing.
- Cement and sand for base
layer shall be mixed in
proportion as specified in the item, Cement and sand shall be proportioned by volume after making due allowance for bulking. The required quantity of water shall
then be added and the mortar mixed to produce workable consistency.
- Curing shall be started as
soon as the mortar used for
finished has hardened sufficiently no to be damaged when watered. It
shall be kept wet
for a period of at least 7
days. During this period, it shall be suitably protected from all damages;
- During hot weather, all finished or partly finished work shall be covered or wetted in such manner as will
prevent rapid drying of
the flooring work.
- Joints of Marble stone slab flooring shall be through and continuous throughout the
building as directed by
Engineer in charge.
- Joints shall be filled with a stiff mixture of gray cement slurry.
- The Marble stone slab flooring work shall be finished by rubbing and mirror polishing after the work
of flooring is set properly.
Mode of Measurement & Payment
- The unit
rate Green Marble stone slab flooring
shall include the cost of all materials, tools and plant required for mixing, laying of base layer in true level and slope as required
applying & placing
stones in position, finishing, curing etc. flooring all over the length of
walls and corners and sill of doors
etc. and all other incidental
expenses for producing flooring work
to complete the structure
or its components as shown on the drawings and according to these
specifications. They shall also include the cost of making, fixing and removing
of all scaffolding and forms
required for the work. The rate includes cost of mirror polishing of flooring
and dado work.
- The rate
shall include
the cost of all materials and labours involved in all the operations
described above. The Green Marble
stone flooring shall be measured in Square meter correct to 2
places of decimal. Length and breadth
shall be measured to correct to a centimetre and between the finished the finished face of the skirting,
dado or wall plaster and no deduction shall be made nor extra paid for any opening in floors or areas up to 0.1 square meter.
- The rate
shall be for a unit of “one Square meter.”
