EFFECT OF SULPHATES ON STRENGTH AND DURABILITY OF SOIL-CEMENT SPECIMENS

Abstract

One of the ads p roblemc that arise from the use of cam *t stabilized soil. as a road base *ate * is the presence Of ehLca1 copcu *ds the soil Bch can either inhibit the *oral hardening of the cem t or lead .t tely to a loss of da bility Of the hardened hater . Detrimentall salts present In gad water is also known to adversely affect the durability r ` soil cement.,. The behaviour of concrete exposed to sulphate is fairly well known and considerablee research has gone Into the development of sulphate resistant cements and cc*ere e' WW * However studies as the effects of sulphate on the str€ngths and durability of soilcenent have been meagre and as a rem t$ the aechanien of sulphate action is not fairly un derst d at presents While certain su3pbates Is particular circumstances are feud to be beneficial in , the successful stabilizationof soils, some other sulphates have been found to be highly detrimentall in vary: degrees is different soils, The most benefctsl salts are caustic cutIc soda, soda ash$ sodius suiphite, sodium. *etasiii sate mad sodium. aiwilnate. The 2ithiu and Potassi Ca*POUjadn acts sinilarly but to a lesser degree