General and Technical Specifications For Construction of Hostels at ...

General and Technical Specifications For Construction of Hostels at PDPU Campus,
Gandhinagar.
Title – Material Specifications – Civil Works
47A.5 Tolerance of length and breadth shall be + 1 mm. Tolerance of thickness shall be + 5 mm.
HCP Design and Project Management Pvt. Ltd. Ahmedabad
Section: D
Sheet 25 OF
44
47A.6 The tiles shall satisfy the test as regards transverse strength, resistance to wear and water absorption as per IS :
1237.
Testing Standards :
A. Water Absorption :
Sampling :
6 tiles out of every 3000 tiles are taken for testing.
Results :
Absorption permissible, shall be at the most 10%.
B. Transverse strength test :
Sampling :
12 tiles out of every 3000 tiles are taken for testing.
Results :
When wet :- 80 Kg/cm 2 .
When dry :- 120 Kg/cm 2 .
C. Abrasion test :
Sampling :
6 tiles out of every 3000 tiles are taken for testing.
Results :
Average abrasion shall not be more than 3.5 mm.
M-47B Plain Coloured Tiles :
47B.1 These tiles shall have the same specifications as plain cement tiles, as in 47A above except that they shall have a
plain wearing surface, wherein pigments are used. They shall conform to IS : 1237.
47B.2 The pigments used for colouring cement shall not exceed 10% by weight of cement used in the mix. The pigments,
synthetic or otherwise, used for colouring tiles shall have permanent colour and shall not contain materials
detrimental to concrete.
47B.3 The colour of the tiles shall be specified in the item or as directed.
M-47C Marble Mosaic Tiles :
47C.1 These tiles have the same specifications as plain cement tiles except for the requirements stated below:
47C.2 The marble mosaic tiles shall conform to IS : 1237. The wearing face of the tiles shall be mechanically ground and
filled. The wearing face of tiles shall be free from projections, depressions and cracks and shall be reasonably parallel
to the backing of the tiles. All angles shall be right angles and all edges shall be sharp and true.
47C.3 Chips used in the tiles shall be of the smallest size upto 20 mm. size. The minimum thickness of the wearing layer of
tiles shall be 6 mm. For pattern of chips required on the wearing face, a few samples with or without their full size
photographs, as directed shall be presented to the Engineer-in-charge and Architect, for approval.
47C.4 Any particular sample, if found suitable shall be approved by the Engineer-in-charge and Architect, or he may ask for
a few more samples to be presented. The samples shall have to be made by the Contractor till a suitable sample is
finally approved for use in the work. The Contractor shall ensure that the tiles supplied for the work shall be in
conformity with the approved sample only, in terms of its dimensions, thickness of the backing layer and wearing
surface, materials, ingredients, colour shade, chips distribution, etc. required.
47C.5 The tiles shall be prepared from cement conforming to IS or coloured Portland cement, generally depending upon the
colour of tiles to be used or as directed.