Ubuhlalu obuntantayo besitshalo samandla buphinde bucwengisiswe ngochungechunge lwezinqubo, ezingacwengisiswa kusukela esitshalweni samandla, ngakho-ke ubuhlalu obuntantayo bungacwengisiswa kanjani kusukela esitshalweni samandla. Udinga ubuchwepheshe obuphezulu? Yiziphi izinqubo nezici okudingeka zinakwe
Umlotha wempukane wesitshalo samandla uwuhlobo lwensalela yempuphu evela kubhoyila yegesi yomoya ngemva kokushiswa kwamalahle okucoliwe. Luhlobo lwezinto ezenziwe nge-pozzolanic, okungukuthi, uhlobo lwezinto ze-siliceous noma ze-aluminosilicate. Ukusebenza komlotha wempukane kunokuguquguquka okukhulu, okungahlobene nje kuphela nohlobo lwamalahle nomthombo wamalahle, kodwa futhi kuncike ohlotsheni lwebhoyila, izimo zokusebenza kanye nemodi yokukhipha umlotha. Ngokuvamile, lapho izinga lokupholisa lishesha, okuqukethwe yingilazi kukhulu, ngokuphambene nalokho, ingilazi kulula ukuyikhazimula. Kungabonakala ukuthi ngokwesigaba, umlotha wempukane uyinhlanganisela yamaminerali ekristalu kanye namaminerali angewona amakristalu, futhi ukuguquguquka kokwakheka kwawo kwamaminerali kukhulu kakhulu.