Specifications for Stone Grit Wash Plaster(46-47)

`` Specifications for Stone Grit Wash Plaster 1)

The base plaster shall be 8 to 12 mm thick in c.m. 1 : 4 in gray cement and should be sufficiently rough and combed by wire brush or nail comb, freed from all dust, dirt, grease, oil etc. for proper bonding.

2)

The base plaster should be cured for 3 to 4 days before applying the Grit Wash Plaster.

3)

A homogeneous mix of white cement, coarse sand and 10 mm nominal size stone chippings of approved colour in proportion 1 : ½ : 2 be prepared.

4)

Water proofing compound be added to the mix @ 2 % by weight of cement and be mixed homogeneously and mix then be applied on a prepared base surface with a float applying gentle pressure. White cement slurry shall be applied @ 2 kg/sqm. On base coat before applying a stone grit wash plaster.

5)

After the initial setting of about 1 to 2 hours the surface of stone Grit plaster surface be scrubbed and washed out gently with a nylon brush and water. The cement on the surface of stone chips be washed away exposing the aggregates.

6)

The plastered surface shall be cured for 14 days.

Specification for Stone Crete plaster. 1)

The base plaster shall be 8 to 12 mm thick in cm. 1:4, in gray cement and should be sufficient rough and combed by wire brush or a nail comb, freed from all dust, dirt, grease oil etc. for proper bonding.

2)

The base plaster should be cured for 3 to 4 days before applying a Stonecrete plaster.

3)

A dry homogeneous mix of white cement and marble powder in proportion 1:1 be prepared.

4)

Synthetic inorganic pigments be added to the above mix & be mixed homogeneously in order to get the desired shade.

5)

Water proofing compound be added to the above mix @ 2 % by weight of white cement.

6)

1 part of marble chips (zero no. - passing through 2.36 mm & retained on 600 mic. I.S. Sieve) or quartz sand be added to 1 part of above mix and be mixed homogeneously.

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7)

`` The above mix be prepared in dry condition and potable water be added to the dry mix in such a quantity as to get a mortar having stiff consistancy and this mortar be applied on the prepared base surface. White cement slurry be applied @ 2 kg/sqm. On base coat before applying a stonecrete plaster.

8)

After initial setting of 1 to 2 hours the grooves can be cut as per the required size and design of the panel with a sharp steel strip.

9)

After 2 to 3 days of curing, the Ashlar Stone Finish can be obtained by chiseling the surface with a chisel and a hammer.

10)

If desired, an uneven pattern can be obtained on the plaster surface by hammering with the help of rough rubber sheet just after the groove cutting.

11)

The surface shall be curved again for 2 - 3 days.

12)

The surface be cleaned by wire brush and wash out all dust, dirt etc. for good texture.

13)

After complete drying, apply Silicone coating or water repellent with the help of a brush or a spray.

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