Gypsum enables volume expansion in concrete, which induces
tensile stresses that result in cracking and spalling. Further reaction
of gypsum with calcium aluminate can lead to the formation of
ettringite which leads to further expansion and more micro and
macro cracking. In addition to this, sulphuric acid decalcifies the
calciumesilicateehydrate (CeSeH) and thus decomposes the
cementitious matrix and leads to the strength loss of concrete
(Bassuoni and Nehdi, 2007)