Ko te bitumen whakaehunga he whakaehunga hou i hangaia e te mahi miihini o te waikawa me te otinga wai whakaehunga.
Ka whakarōpūtia te bitumen whakaehunga i runga i nga ahuatanga matūriki rereke o te emulsifier bitumen e whakamahia ana: cationic emulsion bitumen, anionic emulsion bitumen me te nonionic emulsion bitumen.
Neke atu i te 95% o te hanga rori e whakamahi ana i te cationic emulsion bitumen. He aha nga painga o te bitumen whakaehunga cationic?
1. He whanui te whiriwhiringa wai. Ko te bitumen, te wai me te whakaehunga bitumen nga mea matua mo te whakaehunga bitumen. Ko te bitumen whakaemulsi anionic me whakarite ki te wai ngawari, kaua hoki e waimeha ki te wai maro. Mo te bitumen whakaehunga cationic, ka taea e koe te whiriwhiri bitumen whakaehunga mo te wai pakeke. Ka taea e koe te whakamahi i te wai pakeke ki te whakarite i tetahi otinga wai whakaemi, ka taea ranei e koe te waimeha tika.
2. Hanga ngawari me te pai o te pumau. He ngoikore te pumau o nga anion, me taapiri nga whakaurunga hei whakarite i te pumau o te hua kua oti. I te nuinga o nga wa, ka taea e te cationic emulsion bitumen te whakaputa i te bitumen whakaehunga pumau me te kore e taapiri etahi atu taapiri.
3. Mo te bitumen whakaehunga cationic, he maha nga huarahi hei whakatika i te tere demulsification me te iti o te utu.
4. Ka taea tonu te hanga i te cationic emulsified asphalt kia rite ki o mua i nga taima makuku, iti-pamahana ranei (i runga ake i te 5℃).
5. He pai te piri ki te kohatu. Ko nga matūriki bitumen whakaehunga cationic e kawe utu cationic. Ina pa ana ki te kowhatu, ka tere te uru o nga matūriki uku ki runga i te mata o te kowhatu na te kukume o nga ahuatanga rereke. Ka whakamahia ki te hanga hiri moroiti me te hanga hiri.
6. He pai ake te viscosity o te bitumen whakaehunga cationic i te bitumen whakaemulsion anionic. I te wa e peita ana, he uaua ake te bitumen whakaehunga cationic, no reira ka taea e koe te kowhiri ki te rehu. Engari, he ngawari te peita i te bitumen whakaemulsion anionic. Ka taea te whakamahi hei hinu paparanga kuhu me te hinu paparanga piri ki te hanga parewai me te whariki huarahi.
7. Ka tuwhera te bitumen whakaehunga cationic ki nga waka.