Nyefee na oyi akwa nke caulk. Mgbe ịsachara ihe mkpuchi ahụ nke ọma, jiri obere pịa 8 ~ 12t ozugbo tụgharịa ya, kpochie akara wiilị ihe dịka 1/2 elu na ala, wee tụgharịa ya ugboro 4 ~ 6 ruo mgbe ọ kwụsiri ike. Mgbe ị na-atụgharị, pịa wee zaa ka ọ bụrụ nke ọ bụla ka edobere ihe mkpuchi ahụ. Ọ bụrụ na nnukwu mgbanwe na-eme n'oge usoro ntụgharị, a ga-akwụsị ịgbagharị ahụ ozugbo, a ga-anọgidekwa na-emegharị ahụ mgbe mmiri na-ekpo ọkụ na-ekpochapụ ọzọ.

Dị ka usoro a kọwara si dị, fesaa akwa abụọ nke emulsion bitumen equipments, gbasaa oyi akwa nke abụọ nke ihe ndochi nkwonkwo, ma fesaa akwa akwa emulsion bitumen atọ mgbe ị gachara. Gbasaa ihe site na akwa akwa dịka usoro nke ịgbasa ihe mkpuchi. nrụgide ikpeazụ. Ekwesịrị iji igwe na-ama jijiji nke 6 ~ 8t mee ihe maka ịgbagharị, na-atụgharị ugboro 2 ~ 4, wee mepee maka njem.
Ndozi mbụ. Mgbe ị na-emepe elu na elu ala nke ala, agbasala ihe ndị na-esi na ya dị n'elu elu nke ntinye ntinye. A ga-emepe akwa akwa ngwakọta mgbe igwe bitumen emulsion mebie emulsion na mmiri na-ekpochapụ ka ọ bụrụ ụdị kwụsiri ike. Enweghị ike ịrụ akwa akwa ngwakọta na akụkụ ntinye aka mgbe niile.
Mgbe a na-ebugharị ụgbọ ala a na-ewu maka obere oge, ọnụ ọgụgụ nke ihe mkpuchi nke abụọ nke na-abanye n'ime oyi akwa kwesịrị ịbụ 2 ~ 3M3 / 1000㎡. Tupu ịkwa akwa akwa asphalt a gwakọtara agwakọta, a ga-ewepụ unyi, uzuzu na ájá na-ese n'elu mmiri n'elu oyi akwa ahụ, jupụta ma tụgharịa, fesa ya na asphalt nrapado.