Willdale Brick Standard Specifications for Products

       
WILLDALE CLAY BRICK CLASSIFICATION  
 
CLAY NON FACE PRODUCTS: Common or Stock Bricks   
These are available in two categories and have no claim to colour or fine texture finish  
NFP - Non Facing Plasterd  
These are clay bricks that are suitable for general building work which is then plastered or rendered  
NFX - Non Facing Extra  
These are brickssuitable for plastered or unplastered work for general building work below the damp proof course
or under damp conditions or below ground level where durability rather than aesthetics is the criterion for selection.
 
CLAY FACE PRODUCTS  
 
FBX - FACE BRICK EXTRA  
Durable face bricks possessing a high degree of size, shape and colour uniformity  
FBS - FACE BRICK STANDARD  
Durable face bricks that are uniform in shape and size  
FBA - FACE BRICK AESTHETIC  
Durable clay face bricks selected or produced for a highly individual aesthetic look derived from deliberate non   
uniformity of shape and colour  
 
COMPRESSIVE STRENGTH OF BRICKS  
The compressive strength of bricks shall be not less than the values given in Table 1  
 
TABLE1 - COMPRESSIVE STREGTH OF BRICKS  
 
Class of bricks Average compressive strength, minimum Individual compressive strength, minimum  
  Mpa Mpa  
Common 7 5  
Industrial 15 12  
Facing 15 12  
Engineering 25 20  
 
DIMMENSIONS  
The formats of bricks and blocks shall be designated in terms of their norminal dimmensions which, with the exception of 
the width of the blocks, include the thickness of the mortar joint.For the purpose of this specification, this is taken to be equal to 10mm.  
The standard brick format are given in  Table 3 and the block formats in Table 4.  
Other Dimensions shall be as agreed between manufacturer and Purchaser.  
 
TABLE 2 - DIMENSIONS OF BRICKS  
 
Designation (mm) Actual dimensions
Length (mm) Width (mm) Height (mm)
235 - 110 - 83 225 108 73
 
EFFLORESCENCE  
The efflorescence of bricks shall be as specified in T able 3  
 
TABLE 3 - EFFLORESCENCE  
 
Class of brick Efflorescence  
Common Moderate  
Industrial Moderate  
Facing Slight  
Engineering Slight  
 
MOISTURE ABSORPTION  
No limiting values are given as provision against thawing and freezing is not generally required in Zimbabwe and the fact that water 
absorption is not an index of durability of a brick.  
If required by the purchaser, a limit of water absorption shall be agreed upon between purchaser and Willdale Bricks.
 
APPROXIMATE NUMBER OF BRICKS PER SQUARE METER = 54, INCLUDING 10MM JOINT.  
 
NOTE:  
All products are manufactured in accordance with SAZS 221 : 1996 Zimbabwe Standard Specification for Burnt Clay Building Bricks and Blocks