Ishushu Kangakanani I-Asphalt Evela Kwisityalo kwaye Kutheni Amaqela Okugalela Iindle Afanele Akhathalele?
Inyaniso Eyoyikisayo Yesilinganisi Semitha: Ishushu Kangakanani I-Asphalt Evela Kwisityalo?
Ukuba wakha wema iiyadi ezimbalwa ukusuka kwisityalo sokuxuba idrama egqumayo emva kwemini yasehlotyeni, sele uyazi ukuba impendulo ithi “ kushushu kakhulu kunokuba ucinga .” Uninzi lweenkcukacha ze-DOT zifuna amaqondo obushushu okuxuba aphakathi kwama-275 °F nama-325 °F (135 °C–163 °C) kwindawo yokulayisha. NgesiNgesi esilula, oko kushushu ngokwaneleyo ukuqhotsa i-steak ephakathi nengaqhelekanga ngaphantsi kwemizuzwana engama-30. Kwaye ewe, ukufundile kakuhle oko—275 °F yeyona minimum , hayi eyona maximum.
Kutheni inqanawa yezityalo ixuba ishushu kangaka, kunjalo?
Isamente ye-asphalt (iglu emnyama ebamba amatye kunye) inobume obufana ne-molasses ebandayo kubushushu begumbi. Ukuze igqume ilitye ngalinye kunye nesanti, i-binder kufuneka ibe manzi. Ukufudumala kunciphisa i-viscosity ngokukhawuleza: rhoqo xa inyuka ngama-25 °F, i-binder iba yi-runny ephindwe kabini . Ngoko ke isityalo sityhala i-envelope ukuqinisekisa ukugquma okupheleleyo, ingakumbi kwii-aggregates ezinemingxuma ezisela ulwelo. Ingongoma ephambili: okukhona umxube ushushu, kokukhona ukugquma kungcono, kwaye kokukhona indlela yokuhamba iqina.
Kwenzeka ntoni ukuba umthwalo uphola ngaphambi kokuba ufike kwindawo yomsebenzi?
Nje ukuba ilori iphume esangweni, ukulahleka kobushushu kuyaqala. Uphando oluvela kwiNational Asphalt Pavement Association (NAPA) lubonisa ukwehla kwe-5–7 °F ngemayile nganye kwi-60 °F ngosuku. Yongeza umoya, ukuhamba ixesha elide, okanye ukuhamba ebusuku kwaye i-delta iyakhula. Ukuba imathi ifika ngaphantsi kakhulu240 °F (116 °C) , ukuxinana kuba yingxaki enkulu. Iirola azisenakuvala izithuba zomoya, kwaye umxube uba buthathaka, nto leyo ekhokelela ekuqhekekeni kwangethuba nasekuqhumeni. Inguqulelo : indawo yakho yokupaka entsha ingabonakala ineminyaka elishumi ubudala kwiinyanga ezintandathu.
Indlela Yokugcina Ubushushu Bukwindawo Obufaneleyo—Ngaphakathi Komthwalo
- I - tarp elula ye-vinyl inciphisa ukulahleka kobushushu nge-35% kwiimoto ezingaphantsi kweekhilomitha ezingama-20.
- Sebenzisa iibhedi ezigqunywe nge-insulation . Iibhedi ezigqunywe nge-aluminium zigcina amaqondo obushushu aphezulu okukhupha amanzi kwi-15–20 °F xa kuthelekiswa nentsimbi eqhelekileyo.
- Ixesha lokuthulula . Cwangcisa ukuhanjiswa ukuze i-paver ingayeki; intloko ye-paver ehamba rhoqo igcina ukwahlulwa kobushushu kuvaliwe.
Ingcebiso yobungcali:
Musa ukukhupha umthwalo ube ziingqimba . Ukulahla isiqingatha somthwalo, ulinde imizuzu elishumi, uze ulahle okuseleyo kudala umongo obandayo ongenakulungiswa yirola.
Amehlo eDijithali: Izinzwa ze-Infrared Yonke indawo
Izityalo zanamhlanje ngoku zibeka iikhamera ze-infrared ngaphezulu kwe-loading hopper. Ezi zixhobo zilinganisa wonke umphezulu welori nganye ngexesha langempela, ziphawula imithwalo engaphantsi kwe-spec. Idatha ilayishwa ngokuzenzekelayo kwiideshibhodi zamafu, ngoko ke abahloli be-DOT kunye nabaphathi beepaving banokulandula iqela elipholileyo ngaphambi kokuba lifike endleleni.
Ngaba Ubushushu Bendawo Engqongileyo Buyayitshintsha Indawo Yokubeka Izityalo?
Ngokuqinisekileyo. Ngentsasa yentwasahlobo engama-40°F, umqhubi wesityalo angabetha ithagethi kuye330 °F ukuhlawula iindlela ezibandayo zokuthutha. Ngokwahlukileyo koko, emva kwemini kaJulayi engama-95 °F, indawo yokubeka ingabuyela ku290 °F ukuthintela ukuchitheka kwamanzi kwi-binder. Cinga ngayo njengokufudumeza i-oven yakho kwangaphambili: ulungisa idayali ngokusekelwe kwinto ephekwa ngaphandle.
Ngaba Ungayifudumeza Kakhulu Le Mix?
Inene. Cinezela umxube udlule350 °F (177 °C) kwaye isamente ye-asphalt iqala ukubola ngokukhawuleza. I-binder ijika ibe buthathaka, kwaye umsi oluhlaza okwesibhakabhaka owubonayo ngokwenene uvutha iioyile ezikhanyayo . Oku akupheleli nje ekubangeleni iintloko ezibuhlungu kwindalo, kodwa kukwashiya indlela esendleleni isengozini yokuqhekeka kobushushu ebusika bokuqala. Ngamafutshane, ubushushu bungcono—de bungabi njalo.
Imeko yokwenyani: Uhambo lweemayile ezingama-20 eArizona
Masihlalutye amanani. Ubushushu besango lesityalo: 315 °F. Indawo ephakathi: 105 °F. Umgama wokuthutha: 20 miles kwi-55 mph. Sisebenzisa imodeli yokupholisa ye-NAPA, umxube ufika kwi285 °F —isekwifestile yokuxinana. Kodwa yongeza umoya ohamba phambili nge-15-mph kwaye iqondo lobushushu lokufika liyehla liye270 °F Ngoku i-breakdown roller inemizuzu esibhozo kuphela yokufikelela kwi-92% density ngaphambi kokuba imathi iwele ngaphantsi kwama-240 °F. Ukuba uphoswa yiloo festile, usukela izithunzi.
I-Money Shot: Ixabisa malini iCool Mix?
Umthwalo omnye weetoni ezingama-20 ofikelela ngaphantsi kwemilinganiselo ethile unokubiza umntu oza kuwusebenzisa:
| Into | Ixabiso |
|---|---|
| Ukususwa kunye nokutshintshwa | $1,200 |
| Ukusila kunye nokugquma | $800 |
| Isohlwayo se-DOT | $500 |
| Ukuvezwa ngokupheleleyo | $2,500 ngelori nganye |
Phinda-phinda loo nto ngeelori ezilishumi ngosuku kwaye ujonge kwi- $25,000 xa uphinda ulungisa ngaphambi kwesidlo sasemini. Ngequbuliso, olo hlaziyo lwekhamera ye-infrared ye-$300 luvakala ngathi lutshintshile.
Izinto ezibalulekileyo ekufuneka zenziwe ngamaqela okuHamba ngeenyawo
Khumbula, ubushushu buyinto eshukumayo . Jonga iindawo ezimiselweyo zesityalo, umgama wokuthutha, isantya somoya, kunye nobushushu bemozulu ngexesha langempela. Phatha yonke imithwalo njengokuhanjiswa kwepizza eshushu: okukhona ifikelela kumthengi ngokukhawuleza nangokushushu, kokukhona wonke umntu evuya ngakumbi.
