Isityalo sokuxuba iAsphalt esishushu singanciphisa njani iindleko zakho kunye neCarbon Footprint ngexesha elinye?
Kutheni Abakhi Bezakhiwo Bexakeke Kakhulu Ngokusebenzisa Izinto Ezintsha Kakhulu
Ukuba ubukhe wajonga nayiphi na iforam yeshishini kutshanje, mhlawumbi ukhe wabona ingxolo malunga nomzi-mveliso wokuxuba i-asphalt oshushu ophinda usetyenziswe . Ayisiyonto nje ekhazimlayo; iba yindlela esetyenziswa kakhulu yokuhlala unenzuzo ngelixa ugcina ii-arhente zendlela zonwabile. Kodwa yintoni kanye kanye eyenza obu buchwephesha bube nomtsalane kangaka, kwaye kutheni na amaqela amancinci okuhamba ngeenyawo ephumelela kakhulu? Masikhe sijonge.
Oko Kuthethwa Yi "Hot Recycling" NgesiNgesi Esilula
Ngamafutshane, ukuphinda usebenzise izinto ezishushu kukuvumela ukuba ukrazule indlela eyayiqhekekile izolo, uyifudumale, uyityumze, uze uyixube nge-virgin aggregate kunye ne-bitumen—uze uyibeke phantsi kwakhona. Lo mlingo wenzeka ngaphakathi kwisityalo sokuxuba i-asphalt esishushu apho i-RAP (Reclaimed Asphalt Pavement) ifudunyezwa kubushushu obuchanekileyo, ivuselelwe, kwaye ihlanganiswe kwakhona ngamanani anokufikelela kwi-60% yomxube. Inguqulelo: udinga izinto ezintsha eziluhlaza, ipetroli encinci, kunye nendawo encinci kakhulu yokulahla inkunkuma.
I-Dollars-and-Cents Equation
Ukonga Izinto Eziphathekayo
Amaxabiso ebhitumene ayenyuka njengengcongconi yasebusuku. Itoni nganye ye-RAP oyisebenzisayo ithatha indawo yebhitumene eyi-5% eyi-virgin. Kumsebenzi wendlela omkhulu weetoni ezingama-50 000, loo nto ixabisa i-$250 000 egciniweyo—eyaneleyo ukwenza nawuphi na umphathi weprojekthi ancume ukusuka endlebeni ukuya endlebeni.
Ukunciphisa ukuthuthwa kwenkunkuma kunye nokuthuthwa kwenkunkuma
Iintlawulo zokulahla inkunkuma azifani nakuqala; zimbi kakhulu. Ngokusebenzisa kwakhona izixhobo zokugaya kwindawo leyo, udlula isango lokulahla inkunkuma kunye nothotho lweelori ezithwala izinto "ezilahliweyo". Olunye uphando lwakutshanje lwe-DOT lubonise ukwehla kwama-38% kwiindleko ezinxulumene nothutho xa kwasetyenziswa isityalo sokuxuba i-asphalt esishushu endaweni yesiqhelo "sokugaya nokuthutha".
Izikhuthazo zeRhafu kunye neeCredits eziLuhlaza
Amazwe aliqela aseMelika ngoku anikezela ngeebhonasi ezitshintshayo kwiingxubevange ezinomxholo ophinda usetyenziswe we-≥ 30%. Amaxabiso ebhidi ayehla, amazinga okuphumelela ayenyuka, kwaye i-accountant yakho ngequbuliso iyeka ukuphefumla ngamandla ekupheleni kwenyanga.
Ukuphumelela Kwindalo Esingqongileyo Okuchukumisa Nabalawuli Abaqinileyo
Ukunciphisa ukukhutshwa kwe-CO₂ nge-15–25% ngetoni nganye yomxube kuvakala kamnandi ephepheni, kodwa kumnandi nangakumbi xa uthumela iprojekthi kwibhunga lesixeko phantsi kwemakroskopu ukuze ufumane izithembiso zemozulu. Isosi eyimfihlo sisigubhu sokomisa esishushu ngokukhawuleza i-RAP ngaphandle kokutshisa iioyile ezikhanyayo ozifunayo ukuze usebenze kakuhle. I-bitumen encinci ikwathetha ukutsalwa kweoyile encinci, ngoko ke uphawula zombini iibhokisi zeScope 1 kunye neScope 3 kwi-carbon ledger. Ayimbi kakhulu, akunjalo?
Ukukhetha Uqwalaselo Lwezityalo Olufanelekileyo
Ukuhamba-hambayo ngokuhambelanayo kunye nokuhamba-hamba ngokuchasana
Iidrama ezihamba ngokurhabaxa zilawula imarike yezityalo zokuxuba i-asphalt ezisetyenziswa ngokutsha ezishushu kuba zahlula iigesi zokutsha kwindawo yokungenisa i-RAP. Oku kuthintela umsi oluhlaza okwesibhakabhaka kwaye kugcina ukukhutshwa kwe-hydrocarbon phantsi kwemida ye-EPA ehlala iqina.
I-Pugmill enye kunye neTwin Shaft
Ngaba ufuna umxube ofana kakhulu kwi-50% RAP? I-pugmill ye-twin-shaft ikunika ixesha lokuhlala elingaphantsi kwemizuzwana engama-45, eliyaneleyo ukugubungela yonke into ngaphandle kwe-oxidation. Iiyunithi ze-single-shaft zisenokufikelela kwi-40% RAP, kodwa zibiza kancinci ukuba iinkcukacha zakho zomsebenzi eziqhelekileyo zijikeleza malunga ne-20-25%.
Iizibuko zokufaka inaliti ezongezelelweyo
Izityalo zanamhlanje ziza neeports zokuvuselela, iifayibha, okanye iimodifier zeplastiki. Cacisa ii-injection lances zentsimbi engagqwaliyo ukuba ubona ukuba uza kutshintsha phakathi kwe-wax-based kunye ne-bio-oil rejuvenators; kungenjalo, uza kutshintsha iipayipi ezidla ngokugqwala rhoqo emva kwexesha lonyaka.
Ukufakelwa kunye Nemiqobo Yokusebenza Akukho Mntu Uthethayo Ngayo
Kulungile, nantsi ingxaki egumbini: isityalo esishushu sokuphinda sisetyenziswe asikwazi ukuxhuma nokudlala. Uza kuyidinga:
- Umthamo owongezelelweyo we-silo we-RAP eqhekeziweyo (ewe, kufuneka uzihlole ezo zixhobo zokugaya);
- Ibhulorho yokulinganisa enokusingatha ukondla ngemijelo emibini—kuba ii-RAP kunye nee-virgin aggregates zingena ngesantya esahlukileyo sebhanti;
- Iprobe yokufuma ethembekileyo. I-RAP kwi-5% yokufuma xa ithelekiswa ne-1% ingawushukumisa umthwalo wakho wesitovu nge-12%, nto leyo, ndikholelwe, ibonakala kwityala lepetroli.
Owu, kwaye kukho inguqulelo encinci yegrama yokugcina izinto zilungile: “Isityalo sihamba kakuhle xa ukutya kwe-RAP kulinganisiwe.” (Kufanele ukuba “kuqhutywe,” kodwa akukho mntu ugqibeleleyo, akunjalo?)
Iingcebiso Zokugcina I-ROI Yakho Isemgceni
I-asphalt ephinda isetyenziswe ineziqwenga zothuli ezinokugquma izihluzi zengxowa ngokukhawuleza kunomxube we-virgin. Jikelezisa izihluzi rhoqo emva kweeyure ezingama-800 zokusebenza endaweni ye-1 200 eqhelekileyo. Kwakhona, ii-paddles zentsimbi engagqwaliyo ngaphakathi kwi-pugmill zinciphisa ukuguguleka malunga ne-30% xa kuthelekiswa ne-carbon steel—ifanele ukunyusa ukuba unyusa iipesenti eziphezulu ze-RAP. Kwaye, hlala ugcina ikhamera ye-thermographic ikufutshane ukuze ubone iindawo ezishushu kwiibhakethi ze-elevator; ukwakheka kwe-clinker kuya kubulala amandla akho okusebenza.
Ityala lehlabathi lokwenyani: i-40% ye-RAP kwi-Interstate 35
Xa iTexas DOT yakha kwakhona indawo engama-12 eemayile kufutshane neWaco, umakhi watshintsha indawo yokuxuba i-asphalt eshushu engama-250 tph eyenzelwe i-40% RAP. Lo mxube wahlangabezana neempawu ze-PG 76-22, wasindisa iitoni ezili-18 000 ze-virgin aggregate, waza wagqiba kwiiveki ezimbini ngaphambi kwexesha. Okumangalisayo ngakumbi kukuba, uhlalutyo lweendleko zomjikelo wobomi besebe luqikelele ukuba ubomi bendlela buza kwandiswa ngama-22% ngenxa yesivuseleli esiguqulweyo se-polymer abasifakileyo. Ingongoma ephambili: le projekthi ifikelele kwi-8% ngaphantsi kohlahlo lwabiwo-mali kwaye yafumana umakhi imali eyongezelelweyo ye-$1.2 yezigidi kwimivuzo yenkuthazo.
Iindlela Eziza Kulandela: Ngaba Ukuphinda Usebenzise Izinto Ngokushushu Nge-100% Kungaba Yinyani?
Abaphandi baseNetherlands kutshanje basebenzise idrama yebhitumen enefoam ekwaziyo ukurhawuzelela i-90% ye-RAP kwi-160 °C. Umlinganiselo wamandla okutsala ekuqaleni ubonakala uthembisa, kodwa umqobo usengumahluko kwi-RAP stock. Lindela ulawulo lwe-stock oluqhutywa yi-AI—cinga ngee-drones ze-hyperspectral imaging—ukuze ludibanise ukutya kwisithuba seminyaka emihlanu. Xa oko kusenzeka, i-"virgin aggregate kuphela" inokuba libinzana elingaqhelekanga elithethwa yi-foreman yakho endala.
Izinto ezibalulekileyo ekufuneka ziqwalaselwe ziingcali zokupaka indle
Nokuba ungumphathi weendlela kamasipala okanye ungumntu osebenza ngeenyawo, ukudibanisa isityalo sokuxuba i-asphalt esitshisiweyo kwizithuthi zakho akubandakanyi ukulandela imfashini kodwa kubandakanya amanani abandayo nanzima: iindleko eziphantsi zezinto zokwakha, ukwehla kwemveliso yekhabhoni, kunye neendleko ezingcono. Qala kancinci ukuba kufuneka—masithi i-25% RAP—kodwa cacisa isityalo sakho ukuze ukwazi ukukhulisa ukuya kuthi ga kwi-50% xa iiarhente zasekuhlaleni ziphakamisa igunya lazo lokusebenzisa izinto ezisetyenzisiweyo. Ikamva—wena (kunye nomgcini zincwadi wakho) niya kuvuya ukuba nenze njalo.
