Isitshalo Se-Asphalt se-TTM - Umkhiqizi Wemishini Yokuxuba Nokuvuselela I-Asphalt Ochwepheshe Kusukela ngo-2004.
Izitshalo ze-asphalt zibalulekile ekwakheni nasekunakekeleni imigwaqo, imigwaqo emikhulu, kanye neminye imisebenzi yengqalasizinda. Lezi zitshalo zikhiqiza i-asphalt, ingxube ye-aggregate (njenge-gravel noma isihlabathi) kanye ne-asphalt cement, esetshenziswa njengezinto zokwakha i-paving. Uma ucabanga ukuthenga noma ukuqasha isitshalo se-asphalt, omunye wemibuzo yokuqala efika engqondweni uthi: isitshalo se-asphalt sibiza malini?
Izindleko zesitshalo se-asphalt zingahluka kakhulu ngokusekelwe ezicini eziningana. Lokhu kufaka phakathi uhlobo lwesitshalo, umthamo waso, ubuchwepheshe obusetshenziswayo, nokuthi ngabe siyiyunithi emile noma ehambayo. Ake sihlukanise lezi zici ukuze sithole isithombe esicacile.
Kunezinhlobo ezimbili eziyinhloko zezitshalo ze-asphalt: izitshalo ze-batch kanye nezitshalo ze-drum . Izitshalo ze-batch zikhiqiza i-asphalt ngamaqoqo, okuvumela ukuguquguquka okukhulu ekwakhiweni okuxubile, kuyilapho izitshalo ze-drum zikhiqiza i-asphalt njalo. Izitshalo ze-drum ngokuvamile zisebenza kahle futhi zingabizi kakhulu kodwa zingase zibe nemikhawulo ngokwendlela yokwenza ngokwezifiso.
Umthamo wokukhiqiza wesitshalo se-asphalt ulinganiswa ngamathani ngehora (tph). Izitshalo zingasukela kumayunithi amancane, aphathekayo akhiqiza i-50 tph kuya ezitshalweni ezinkulu, ezimile ezikwazi ukukhiqiza i-500 tph noma ngaphezulu. Ngokwemvelo, izitshalo ezinamandla aphezulu zibiza kakhulu.
Izitshalo ze-asphalt ezihambayo zenzelwe amaphrojekthi okwakha esikhashana futhi zingathuthwa kalula zisuka kwenye indawo ziye kwenye. Lezi zilungele osonkontileka abasebenza ezindaweni eziningi. Ngakolunye uhlangothi, izitshalo ezimile ziyizakhiwo ezihlala njalo futhi zifaneleka kangcono kumaphrojekthi amakhulu, esikhathi eside. Izitshalo ezihambayo zivame ukungabizi kakhulu kusengaphambili kodwa zingase zithole izindleko ezengeziwe zokuhamba.
Izitshalo ze-asphalt zesimanje zivame ukuza nezici ezithuthukisiwe njengezinhlelo zokulawula ukungcola, izishisi ezisebenzisa amandla kahle, kanye nobuchwepheshe bokuzenzakalela. Nakuba lezi zici zithuthukisa ukusebenza kahle kanye nokuhambisana nemithethonqubo yemvelo, ziphinde zikhulise izindleko zokuqala zesitshalo.
Manje, ake singene ezindlekweni zangempela. Intengo yesitshalo se-asphalt ingahluka kusukela ku-$50,000 ngeyunithi encane, ephathekayo kuya ku- $500,000 noma ngaphezulu ngesitshalo esikhulu, esingashintshi esinezici ezithuthukisiwe. Ngezansi kunencazelo ejwayelekile yalokho ongalindela ukukukhokha:
Nakuba intengo yokuqala yokuthenga iyindleko enkulu, kunezinye izindleko okufanele uzikhumbule lapho usebenzisa isitshalo se-asphalt.
Ukunakekelwa njalo kubalulekile ukuqinisekisa ukuthi isitshalo sisebenza kahle futhi sandisa isikhathi saso sokuphila. Izindleko zifaka phakathi ukushintshwa kwezingxenye, abasebenzi, kanye nokuhlolwa okuvamile.
Izitshalo ze-asphalt zidinga inani elikhulu likaphethiloli ukuze zisebenze, okunganda ngokuhamba kwesikhathi. Amamodeli asebenzisa amandla kahle angasiza ekunciphiseni lezi zindleko ngokuhamba kwesikhathi.
Uma uthenga isitshalo esihambayo, izindleko zokuhamba phakathi kwezindawo kufanele zibhekwe. Ezitshalo ezimile, izindleko zokufaka zingaba zinkulu.
Njengoba kunezinketho eziningi kangaka ezitholakalayo, ukukhetha isitshalo se-asphalt esifanele kungaba nzima kakhulu. Nazi ezinye izeluleko zokukusiza wenze isinqumo esinolwazi:
Ukuthenga isitshalo se-asphalt kuyitshalomali elikhulu, kodwa kungaba yinto enenzuzo uma ukhetha imodeli efanele izidingo zakho. Ngokuqonda izici ezithonya izindleko nokucabangela ngokucophelela izinketho zakho, ungenza isinqumo esinolwazi esisekela impumelelo yamaphrojekthi akho okwakha noma engqalasizinda.