Umbala womgangatho ogcina i-permeable balance Umbala womgangatho okhusela i-permeable okhusela i-environment, okwaziwa ngokuba yi-concrete enemibhobho, ngumphezulu we-aggregate erhabaxa egqunywe ngumaleko omncinci we-samente paste, i-aggregate kunye ne-samente paste ezidityanisiweyo ukuze zenze usasazo olufanayo lwe-pore.
Ukugcinwa kolungelelwaniso lwendalo lomgangatho wokhuseleko lwendalo olunombala, okwaziwa ngokuba yi "concrete enemibhobho", ngumphezulu we-aggregate erhabaxa egqunywe ngumaleko obhityileyo we-samente paste, i-aggregate kunye ne-samente paste ezidityaniswe ukuze zenze usasazo olufanayo lwemingxunya kwisakhiwo se-honeycomb, ukuze ibe nomoya ovulekileyo, amanzi avulekileyo kunye neempawu ezilula, iphakamisa ngempumelelo imeko yokugcwala kwamanzi kwaye isuse ngokufanelekileyo iingozi zongcoliseko lwendalo olufana nee-oyile ezisemhlabeni. Yinto efanelekileyo yokugcina ulungelelwaniso lwendalo olungqongileyo. Umgangatho ovulekileyo onombala usebenza kwiindawo zokuhamba ngeenyawo, kwiindawo zikawonke-wonke, kwiindawo zokupaka iimoto ezivulekileyo, ezindleleni ezikwiipaki, ezitalatweni zabahambi ngeenyawo zorhwebo, ezindleleni zokuhlala nezoluntu, njalo njalo.
