Page 57 - CONCRETE MATERIALS AND MIXTURE

1.3.3.6 Water proofing

• Concrete absorbs water due to surface tension

in capillary pores in the hydrated cement

paste ‘pulls in’ water by capillary suction

• This admixture prevents penetration of water

into concrete

• Their effect is mainly to make concrete

hydrophobic. Simply put, a condition whereby

the water is “pushed out” of pores