Hoobiyeyaasha qallalan ee isku dhafan waa isku-darka walxaha sibidhka (sibidhka, dambaska duulista, budada slag, iwm.), isku-darka isku-darka wanaagsan ee khaaska ah (ciid quartz, corundum, iwm., mararka qaarkoodna waxay u baahan yihiin isku-daryo fudud, sida ceramsite, polystyrene balaariyay, iwm. .) Granules, perlite balaariyay, vermicu oo la fidiyay...
Akhri wax dheeraad ah