Ukwakha izakhiwo zekhonkrithi ezihlala ixesha elide kunye nokusebenza okuphezulu kuxhomekeke kakhulu ekukhetheni izongezo, ezidlala indima ebalulekileyo ekuphuculeni iipropati eziphathekayo. Ezi zongezo, ezifana nothuthu lwempukane, i-cenospheres, i-perlite eyandisiweyo, i-microspheres yeglasi engenanto, iifiber zekhonkrithi, kunye nee-arhente zokunciphisa amanzi, ziguqula ishishini lokwakha ngokuphucula imixube yekhonkrithi kunye ne-admixtures.