RAW MATERIALS USED FOR WATERPROOFING WORK AND ITS CRITERIA FOR ACCEPTANCE.

Before choosing any type of waterproofing treatment to be carried out for a particular area, selection and specifications of materials plays a very important role. Because the type and quality of materials we used can directly affect the strength and life of that particular treatment.

Its easily understood that if we use poor quality materials, we definitely going to get bad results and on the contrary if we use good quality of materials then the chances of getting the best results are very high.

Below are some of the lists of materials which we generally used for waterproofing work of terrace toilets and balcony areas and water tank (both underground and overhead water tanks).

1) Cement:

Cement shall be 43 / 53 grade OPC (Fly ash shall be used with OPC) / PPC and not more than 8 weeks old and it shall be free of lumps.

The main ingredients for any construction work are cement now a days we cannot imaging any work without cement.

2) Natural sand:

Silt content of natural sand shall not exceed 12% by volume for 1 Hr. and 8% by volume for 2Hrs. Percentage passing 600 microns shall be more than 45%.

3) Fly ash:

Sources of fly ash must be standardized as per test reports and fly ash must meet the requirements of IS 3812. Further retention on 45-micron sieve after wet sieving should be less than 20%.

Fly ash should be free from lumps.

4) Bricks:

Bricks from which brick-bats are made shall not be under burnt and percentage of over burnt bricks shall not be greater than 10%. Bricks used for brick bats shall be either be full bricks or 3/4th bricks. Bricks shall be broken at site with the help of mallet. Irregular broken pieces of bricks shall not be used.

5) Water:

Sulphate and Chlorides content in the water shall be within specified limits as specified in IS- 456:2000.

6) Water proofing compound:

A water proofing compound of reputed manufacturer shall be used. Care shall be taken to see that it is compatible with the type / brand of cement being used. Packing shall clearly bear date of manufacturing, lot number, date of expiry, usage guidelines etc.

7) Glazed tile pieces (for China Mosaic Type Waterproofing):

Broken pieces of selected white / colored glazed tile pieces of size 25mm to 50mm and 6mm thick or as specified on drawing.

8) Bonding Agent:

Suitable bonding agent from the reputed manufacturer shall be used.

 9) Rough Shahabad stones or equivalent stones from quarry:

Rough Shahabad Stone slabs shall be of uniform size and shall be free from cracks and fissures.

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