Kodi Kubwezeretsanso kwa RAP mu Zomera za Asphalt Zotentha Kungachepetsedi Ndalama Popanda Kuwononga Ubwino?

Chifukwa Chake Makampani Akukambirana Zambiri Zokhudza Kubwezeretsanso kwa RAP mu Zomera za Asphalt Zotentha

Mukadutsa malo aliwonse amakono omanga misewu, mwina muwona chikwangwani chodzitamandira ndi "phula lobiriwira." Kumbuyo kwa mawuwo kuli kusintha kwachete: kubwezeretsanso mafakitale otentha a phula omwe amasintha msewu wa dzulo kukhala malo oyendetsera magalimoto amakono. Koma kodi njirayi imasunga ndalama zenizeni, kapena ndi malonda osasangalatsa chilengedwe? Tiyeni tichotse magawo—osasangalatsa, osagulitsa, manambala ndi nkhani zofunika zokha.

Kodi kwenikweni ndi chiyani chomwe chimawerengedwa ngati RAP?

Kukonzanso kwa Asphalt Pavement (RAP) sikuti ndi "zinthu zakale zakuda" zokha. Ndi mphero zokonzedwa zomwe zimakhalabe ndi bitumen yamtengo wapatali komanso zinthu zapamwamba kwambiri. Zikagawidwa bwino ndikuyesedwa, RAP imatha kusintha 15–40% ya zinthu zomwe sizinali zatsopano mu hot-mix yatsopano. M'maiko ena, ma DOT specs amalola kuchuluka kwambiri ngati kusakanizako kukukwaniritsa zofunikira pakugwira ntchito. Kumasulira: makontrakitala omwe amadziwa bwino kugwiritsa ntchito RAP amatha kupereka ma bid otsika pomwe akulandirabe margins abwino.

Momwe Obwezeretsanso Zinthu Amathandizira Kutentha Popanda Kuwononga Ndalama

Nkhawa zachikhalidwe zokhudza RAP zimayang'ana kwambiri kutentha kwa phula lotsala, zomwe zimayambitsa kukalamba msanga. Drum yamakono yoyenda mofanana yokhala ndi mpeni wapakati komanso makina oyenda awiri a counter-flow amathetsa izi poyatsa kaye phula la virgin aggregate, kenako n’kuyambitsa RAP pansi pa drama. Chifukwa miyala yotentha kwambiri imasamutsa mphamvu ku RAP m’malo mwa lawi lotseguka, phula siliphika. Zotsatira zake? Chinyezi chimaphwa, koma chomangira chimasunga kusinthasintha kwake. Chabwino kwambiri, eti?

Kuwerengera ROI pa RAP

Taganizirani za chomera cha 200-tph chomwe chimagwira ntchito maola 2,000 pachaka. Mukayika 25% ya RAP, mumalowa m'malo mwa:

• 50 tph ya chakudya chopanda shuga chomwe chimagulitsidwa pamtengo wa $12 ton → ndalama zosungidwa pachaka za $1.2 miliyoni
• 5% ya bitumen pa $550 ton → ina $1.1 miliyoni yasungidwa
• Ndalama zolipirira malo otayira zinyalala/kunyamula zinyalala zimapewedwa → pafupifupi $200 k

Mukawawonjezera, mukuyang'ana $2.5 miliyoni pachaka musanapereke msonkho. Ngakhale mutagwiritsa ntchito zowunikira zowonjezera za RAP, zoyezera chinyezi, ndi zopondereza nthunzi, nthawi yobwezera nthawi zambiri imakhala pansi pa miyezi 18. Palibe kusintha kwakukulu komwe kungachitike.

Zopinga Zabwino—ndi Momwe Mungazidutsire

Anthu okayikira amanena kuti kusakaniza kwa RAP kwambiri kumakhala kosavuta. Zoona zake n'zakuti, kusweka kumachitika pamene zomera "zimapinda" popanda kulinganiza mtundu wa binder wobwezeretsedwanso. Kukonza kumeneku ndi kusanthula kwa binder kosakanikirana: kuchotsa ndi kuyika muyeso wa binder ya RAP, kenako kusankha ngati muifewetse ndi rejuvenator kapena kuiyika mu virgin binder yofewa. Zomera zomwe zimatsatira protocol ya ASTM D8159 nthawi zonse zimafika pamlingo wa PG ndikupambana malire a Illinois Flexibility Index Test (I-FIT). Mwachidule, khalidwe si njuga ngati muchita homuweki yanu.

Chinyezi: Wowononga Chete

1% iliyonse ya chinyezi chomwe chatsala mu RAP imaba ~10 °C ya kutentha kwanu kosakanikirana bwino. Izi zikutanthauza kuti mumawotcha mafuta ambiri kapena mumaika malo olumikizirana pachiwopsezo. Njira yothetsera vutoli? Kuwunika chinyezi m'magawo atatu :

1. Sungani RAP pa malo otsetsereka a phula okhala ndi 2% grade kuti madzi atuluke.
2. Phimbani pamwamba ndi geotextile yopumira—yotsika mtengo koma imachepetsa kuyamwa kwa mvula ndi theka.
3. Gwiritsani ntchito masensa a microwave omwe ali pamzere pa lamba wozizira; mafakitale omwe amagwiritsa ntchito kusinthaku amanena kuti chinyezi cha 0.8% ndi chochepa mokwanira kuti apange popanda utsi wabuluu.

Ndikhulupirireni, mfundo zazing'ono izi zimasiyanitsa akatswiri ndi omwe akufuna.

Malo Olamulira: Kumene Ndalama Zaulere Zili

Mayiko monga Texas, Missouri, ndi Georgia tsopano akupereka zolimbikitsira pa tani imodzi kwa zosakaniza ndi ≥20% RAP. Ngongole ikhoza kukhala $2–$5 pa tani, kutengera kuchuluka kwa matani ndi mabhonasi a density omwe alipo. Pa ntchito ya boma ya matani 50,000, mwina ndi $250 k m'thumba mwanu—osakhudza ngakhale ndalama zomwe tinaziwerengera kale. Ngati simukupereka ma bid m'maboma amenewo, mungafune kukhala maso; mapulogalamu olimbikitsira akufalikira mofulumira kuposa mphekesera za tsiku lolipira.

Nkhani Yofunika Kwambiri: Interstate 35 ku Oklahoma

Pa nthawi yokonzanso zinthu mu 2022, kontrakitala adagwiritsa ntchito 35% RAP mix yokhala ndi bio-based rejuvenator. Specification idafuna mpweya wosachepera 8% pa 75 gyrations ndi tensile strength ratio ≥80. Sikuti mix idangodutsa, komanso 12% idatsika ndi bajeti ndipo idapatsa kontrakitala chilimbikitso china cha $180 k. Ma Cores omwe adatengedwa chaka chimodzi pambuyo pake sanasonyeze umboni wa kugundana kwa magetsi kapena kutentha. Inde, magwiridwe antchito enieni akuchirikiza deta ya labu.

Kutsimikizira Zamtsogolo: Kodi Zotsatira za RAP Recycling Zidzakhala Zotani?

Opanga zomera akuyesera zowonjezera kutentha kotsika zomwe zimalola 50% RAP pa 275 °F m'malo mwa 320 °F wamba. Kutentha kotsika kumatanthauza kuti okosijeni ndi wochepa, msonkho wotsika wa kaboni, komanso anansi osangalala omwe saimba foni akamadandaula za utsi. Pakadali pano, ma probe oyendetsedwa ndi chinyezi ndi kutentha kwa AI akuchepetsa kusinthasintha; mafakitale akunena kuti zinthu zomwe zili pa binder zimachepa kuchokera pa 0.4% mpaka 0.15%. Kodi mawu olembedwa pakhoma ndi ati? Mkati mwa zaka zisanu, 40% RAP ikhoza kukhala chinthu chatsopano, osati chosiyana.

Mndandanda Wofulumira Woti Muyambe Mawa Mmawa

Ngati muli ndi malo ogwiritsira ntchito zinthu zosakaniza bwino ndipo mukufuna kugwiritsa ntchito bwino RAP recycling, nayi phukusi loyambira losavuta kugwiritsa ntchito:

• Konzani chosinthira chakudya chozizira cha zitini zitatu kuti mulekanitse RAP ndi magawo a kukula.
• Ikani chute yopangira zitsanzo za pneumatic kuti katswiri wanu wa QC athe kutenga RAP pa matani 500 aliwonse.
• Konzani mgwirizano ndi yunivesite yakomweko kuti mupeze ndi kuyika ma binder—zimawononga pafupifupi $150 pa chitsanzo chilichonse koma zimakupulumutsani ku vuto la kulephera kwa ma binder.
• Kambiranani mtengo wokwera pang'onopang'ono ndi wogulitsa zinthu zobwezeretsa chilengedwe; ogulitsa ambiri adzapereka ndalama zokwana magaloni 5000 oyamba ngati musayina pangano la chaka chimodzi lopereka zinthu.

Chitani zinthu zinayi izi ndipo mutha kuchita bwino kwambiri—sikufunikira digiri ya sayansi ya rocket.

Mfundo Yofunika Kwambiri

Kodi mafakitale a phula opangidwa ndi rap omwe amapangidwanso ndi phula lotentha angachepetse ndalama zomwe mumapeza popanda kuwononga ubwino wake? Inde—ngati mutenga RAP ngati chinthu chopangira, osati kuwononga ndalama. Ikani ndalama mu kugawa zinthu, yang'anirani chinyezi ngati chiwombankhanga, ndikutsatira kapangidwe ka kusakaniza kogwiritsa ntchito mphamvu. Phindu lake ndi lachangu: ndalama zochepa, ziphaso zobiriwira, ndi ma bid omwe amapambana mpikisano. Ndipo, ndani sakonda zero yowonjezera pamzere wa phindu?