Kunyungudutsa uye kuisvira mapepa easphalt: Nei ichinyorova pakupisa kwakanyanya? ​​

Asphalt, musanganiswa wakaomarara wehydrocarbons, inoshaya nzvimbo yakapinza yekunyungudika nekuda kwekunyora kwayo. Panzvimbo iyoyo, inoratidzira iyo software yekunyepedzera (kazhinji 40-60 ° C for petroleum asphalt), kupfuura iyo iyo inoshandura kubva kune yakasimba kuenda kuViscous Liquid. Uyu maitiro anobva pane yayo collodal chimiro:

Molecular Dynamics: Pakupisa kwakanyanya, iyo yemvura yemafuta emafuta (maltenes) mukati measphalt inova yakawanda fluid, ichishungurudza asphaltente matrix. Izvi zvinoderedza intermolecular mauto, zvichikonzera kupfava.
Tembiricha inonzwa: Asphalt's viscosity inodonha nekuwedzera nekupisa. Semuenzaniso, pa60 ° C, standard asphalt inogona kurasikirwa ne90% yekuomarara kwayo, inotungamira kuongororwa pasi pemitoro yemigwagwa. Yakagadziridzwa asfirlts (i., sbs kana yakakwira-modulus mhando) dzivisa izvi kuburikidza nePolymer network iyo inosimbisa chimiro kusvika 70 ° C.° C kana yakakwira.
BOLILD uye DOCOMPOTION:
Asphalt inogadzirisa usati wasvika pachinhanho chechokwadi (pazasi 470 ° C), kusunungura ane chepfu magasi senge benzye. Nekudaro, point bol is ishoma pane flash point (~ 204 ° C), inova chiratidzo chekushambadzira panguva yekupisa.

Zvinangwa Zvinoshanda:

Plement kukundikana: tembiricha yezhizha inopfuura makumi mashanu
Solutions: Shandisa yakagadziridzwa binders (i.e., sbs) kana inotonhorera inowedzera kuti isimudzire yakakwira-tembiricha kugadzikana.
Mukupfupikisa, asphalt soffans nekuda kwekuparadzwa kweLolodal