I loko o ka asphalt emulsified, loaʻa i ka waiwai pH kekahi mana i ka helu demulsification. Ma mua o ke aʻo ʻana i ka hopena o ka pH ma ka demulsification rate o ka asphalt emulsified, ua wehewehe ʻia nā mīkini demulsification o ka anionic emulsified asphalt a me ka cationic emulsified asphalt.

Cationic emulsified asphalt demulsification hilinaʻi ma luna o ka maikaʻi o ka naikokene atomi i loko o ka amine pūʻulu i loko o ka kemikala hana o ka asphalt emulsifier e affinity me ka ino o ka aggregate. No laila, ʻokiʻoki ʻia ka wai i loko o ka asphalt emulsified a hoʻokaʻawale ʻia. Hoʻopau ʻia ka demulsification o ka asphalt emulsified. Ma muli o ka hoʻokomo ʻana o ka pH-adjusting acid e hoʻonui i ka uku maikaʻi, hoʻolohi ia i ka hui ʻana o ka uku kūpono i lawe ʻia e ka asphalt emulsifier a me ka hui. No laila, ka pH o ka cationic emulsified asphalt e hoʻopili i ka demulsification rate.
ʻO ka hoʻopiʻi maikaʻi ʻole o ka anionic emulsifier ponoʻī i ka anionic emulsified asphalt he kūʻokoʻa me ka hoʻopiʻi maikaʻi ʻole o ka aggregate. ʻO ka demulsification o ka anionic emulsified asphalt e hilinaʻi ana i ka hoʻopili ʻana o ka asphalt iā ia iho i ka aggregate e ʻoki i ka wai. Ke hilinaʻi nui nei nā mea hoʻoheheʻe asphalt Anionic i nā ʻātoma oxygen e lilo i hydrophilic, a ʻo nā ʻātoma oxygen e hana i nā paʻa hydrogen me ka wai, e hoʻolōʻihi i ka hoʻoheheʻe ʻana o ka wai. Hoʻonui ʻia ka hopena hoʻopili hydrogen ma lalo o nā kūlana acidic a nāwaliwali ma lalo o nā kūlana alkaline. No laila, ʻoi aku ka kiʻekiʻe o ka pH, ʻoi aku ka lohi o ka demulsification rate i ka anionic emulsified asphalt.