Mhinduro dzeRAP Dzokushandisa Pakudzokorodza Hot Mix Asphalt Plants dzingaderedza sei mitengo pasina kukanganisa hunhu?

Wakambozvibvunza here kuti sei vamwe vanovaka migwagwa vachiramba vachihwina mitengo yezvinhu ukuwo mitengo yezvinhu ichiramba ichikwira? Chakavanzika chinowanzova mumhinduro dzavo dzezvishandiso zveasphalt zvinogadzirwa nerap — tekinoroji inodzosa kusvika ku60% yeasphalt yekare uye inoderedza mabhiri ezvinhu zvakagadzirwa nepakati. Ngationgororei nzira dzechokwadi dzinoshandura zvikamu zvekupaka mota zvakagayiwa kuita purofiti. (Uye hongu, tichataurawo nezvekuchinja kumwe chete kunogona kukuchengetedza imwe $0.40 patani.)

Chii chinonzi RAP, uye nei ichikosha pakugadzirwa kweHMA kwemazuva ano?

Asphalt Pavement (RAP) yakawanikwazve haisiri "millings" chete; chinhu chinogoneka kubhengi. Tani yega yega yaunoshandisa zvakare zvinoreva kuti tani imwe chete ye virgin aggregate ne binder yaunofanira kutenga yasara. Muna 2023, liquid AC binder yaisvika paavhareji ye $650 pa ton pfupi muUS Gulf Coast. Sanganisa 30% RAP mumusanganiswa wako uye unobvisa mari inosvika $200 patani yega yega ye asphalt yapera. Izvozvo zvine musoro kuti accountant wako achakupa mari yakawanda.

Mhinduro dzemazuva ano dzeRAP Recycling Hot Mix Asphalt Plants dzinoshanda sei?

Pamwe wakaona madhiramu ekuomesa ekare anofanana neaya anopisa RAP sechingwa chezuro. Zvirimwa zvakanakisa zvemazuva ano zvinoshandisa majaketi ekupisa anochinjika uye evaporation yemvura inodziya . Dudziro: RAP inodziya zvinyoro nyoro, saka bitumen yasara haichembere kana kupwanyika. Mugumisiro wacho? Musanganiswa unosangana neSuperpave volumetrics pasina dambudziko. Mamwe maOEM anotowedzera ma infrared pyrometers anoverenga tembiricha yeaggregate munguva chaiyo, zvichigadzirisa otomatiki RAP feed kuti igare iri mukati me ±3 °C kubva pane chinangwa. Zvakanyatsonaka, handiti?

Kuvandudzwa Kwakakosha Kwemidziyo Yemagetsi Kunozvibhadhara Mumwedzi 18

• Variable-frequency drag slat conveyors : Inoderedza simba remabhiza ne25% uye inoderedza RAP degradation.
• Zvinoparadzanisa mhepo zvine mhute yakawanda : Bvisa 80% yehunyoro RAP isati yarova dhiramu, zvichichengetedza mafuta emoto.
• Pugmill ine shaft mbiri ine 15-second retention : Inobvisa utsi hwebhuruu uye inoita kuti vavakidzani vako vafare.

Unogona Kupfuura 40% RAP Pasina Kukanganisa Kushanda Kwemhepo Yakaderera Here?

Mhinduro pfupi: hongu, asi unofanira kutamba chemist. Soft-grade virgin binder (PG 58-28) pamwe ne0.3% Sasobit kana imwe yakafanana newarm-mix additive inoderedza giredhi repamusoro-soro rinoita basa nedanho rimwe chete uku ichidzorera giredhi repamusoro-soro nematanho maviri. Illinois DOT's 2022 pilot paI-72 yakashandisa 45% RAP neresipi iyoyo chaiyo uye yakapasa TSR (tensile-strength ratio) pa85%. Saka, hapana zvimwe zvikonzero zvekuti "hatigone kukwira kupfuura 25%", vanhuwe.

Ko nezveEmissions? Vatongi Vachandivhara Here?

Miganhu yeEPA MACT yePM2.5 i0.04 gr/dsf. Chirimwa chine reverse-pulse baghouse uye dry lime injection chinowira nyore nyore pa0.01 gr/dsf kunyangwe kana huwandu hweRAP hukasvika 50%. Zano rehunyanzvi: ita bvunzo yekota yestack munguva yechando—huwandu hwemhepo inotonhora hunogona kukanganisa kuverenga, uye haudi kubatwa nemaziso nekuda kwekukanganiswa kwe opacity nguva pfupi mwaka wekugadzira usati wasvika.

Yakavanzika ROI: Baghouse Fines seMineral Filler

Pane kuzadza marara iwayo ane guruva, dzorerai 1–2% mumusanganiswa. Chinozadza chemahara chinowedzera VMA ne0.5% uye chinokubvumirai kubvisa guruva re limestone. Imwe fekitori ye200-tph yatakaongorora muGeorgia yakachengetedza $42 k pagore nekuda kwekuchinja uku. Kwete shanduko huru, handiti?

Maitiro Ekuchengetedza Chirimwa Chako Mune Remangwana Kuti Chibudirire Ne60%

Tanga nedhiramu rine mabhara maviri rinobvisa RAP kubva kunzvimbo yemoto yakananga. Wedzera nzvimbo yekupinda yeRAP inoshanduka-shanduka —iswededze pedyo kana kure neburner zvichienderana nehunyoro. Chekupedzisira, tsanangura chinodyisazve chine mhinduro yekuenzanisa kuitira kuti sisitimu yekudzora zvirimwa igone kugadzirisa otomatiki kudonha kwetani. Mafambiro matatu aya anokugadzirira chero chipi zvacho chinozopihwa neDOT makore gumi anotevera.

Chidzidzo Chenyaya: 38-Mile State Highway muColorado

Purojekiti yaida 110 000 t ye 12.5-mm SMA. Spec yakavhara RAP pa 30%, asi kontrakita akabhadhara pa 40% achishandisa setup iri pamusoro. Net savings: $1.9 M. Chii chakanyanya kunaka? Kushanda kwemigwagwa mushure memwaka miviri yechando-kunyunguduka kwakawana 92 ​​paPCR (pavement condition rating) zvichienzaniswa ne88 yechikamu chekutonga chine virgin mix. Kunyangwe mainjiniya wemigwagwa wehurumende akabvuma kuti, "Hatina kuona izvozvo zvichiitika."

Ngano Dzakajairika Dzinorambwa

Ngano: "Misanganiswa ye "high-RAP" inogara isina kunaka."

Chokwadi: Kufamba kweruts kunoenderana nechimiro che aggregate, kwete RAP percentage. Shandisa CA/FA ratio yakanatswa zvakanaka pedyo ne0.45 uye uchava neramangwana rakanaka.

Ngano: "RAP ine mahydrocarbon asingazivikanwe anonhuwa."

Ehe, hongu, kana ukaisa mafuta muburner yako uye tembiricha iri kuchamhembe kwe340 °C. Chengeta tembiricha iri pasi pe160 °C uye hwema hunoderera kusvika padanho reBBQ remunharaunda.

Rondedzero Yekukurumidza Usati Wagadzirisa

1. Iva nechokwadi chekuti ma silo ako anogona kubata huwandu hwezvinhu zvekuwedzera hwe10% (RAP haina kusimba).
2. Simudzira ma trunnion; madhiramu eRAP anomhanya zvinorema.
3. Taura neDOT yako nekukurumidza—mamwe matunhu achiri kuisa RAP pa25% yeSMA, asi bvumidza kuregererwa kana ukaratidza data remurabhoritari.

Wagadzirira kushandisa mari yako yese yekushandisa asphalt plants uchishandisa rap recycling hot mix here? Tanga ne moisture probe, wedzera VFD paRAP feed, uye tarisa mari yako yekuchengetedza ichienda ku hockey-stick. Uye hei, kana uchida kudzidza zvakadzama nezve burner tuning kana additive dosing, tiudzei—happy paving!