Cracks in Building – Sulphates Attack

Cracks in Building – Sulphates Attack

Preetham Builders one of the Best Builders in Madurai are developing Gated Community Luxury villas and flats.

This gated community ” BRINDAVAN HOMES ” is being developed in Kochadai Madurai, a fast developing area in Madurai.

With abundant water supply and green environments this gated community ” BRINDAVAN HOMES ” with individual buildings and Bungalows present a Resort like feelings.

Preetham Granite M.D addressed the gathering of engineers (Association of Madurai Civil Engineers) on Cracks in Buildings – Causes & Remedies at Hotel Weshtern Park ( 01.09.2016).

Sulphate attack

Soluble sulphates present in soil, ground water or clay bricks react with tricalcium aluminate of cement in the presence of moisture and form products which are bulky  and much bigger volume.

This expansive reaction results in weakening of masonry and concrete

concrete_ass

General measures for avoidance of sulphate attack :

In case of structural concrete in foundation if sulphate content in soil exceeds 0.2 percent or in ground water exceeds 300ppm use very dense concrete and either increase richness of mix to 1:1:1/2:3 or use sulphate resisting of Portland cement super – sulphate cement or adopt a combination of the two methods depending upon  the sulphate content of  the soil . Similarly  in case of mortar  for masonry increase the richness of mix (1:1/2:4 ½: or 1:1:1/4:3, cement; lime : sand or use special cement as mentioned above or adopt a combination of the two methods.