Yog tias koj tau nyeem cov rooj sib tham txog kev tsim kho vaj tse tsis ntev los no, tej zaum koj tau pom cov neeg nyiam tham txog lub Hoobkas sib xyaw ua ke kub asphalt hauv Suav teb . Cov txheej txheem no cog lus tias yuav hloov txog li 50% ntawm cov pob zeb tshiab thiab bitumen nrog cov asphalt pavement (RAP), txo cov nqi khoom siv ntau heev. Tab sis qhov kev tshaj tawm puas yog qhov tseeb, lossis nws tsuas yog lwm qhov kev lag luam "ntsuab" xwb? Cia peb tshawb nrhiav cov ntaub ntawv tiag tiag ntawm qhov project es tsis yog cov ntawv qhia zoo nkauj.
Cov nroj tsuag ib txwm ua kom cov pob zeb tshiab kub txog li 170-180 °C, tom qab ntawd muab cov bitumen tshiab pleev rau. Lub tshuab sib tov kub rov ua dua tshiab uas ua nyob hauv Suav teb ntxiv ib lub "RAP drying drying drum" uas ua kom cov asphalt uas tau sib tsoo kub txog li 130 °C hauv lub chamber uas tsis muaj oxygen. Qhov no tiv thaiv kev laus ntawm cov binder thaum ua kom cov dej noo ploj mus. Tom qab ntawd, RAP uas kub heev yuav sib xyaw nrog cov khoom tshiab uas kub heev, yog li qhov kub sib tov kawg nyob ib puag ncig 155 °C—15 °C qis dua li cov sib tov ib txwm muaj. Qhov kub qis dua sib npaug rau roj tsawg dua, pa tsawg dua, thiab cov neeg zej zog zoo siab dua nyob ze ntawm lub Hoobkas. Yooj yim li ntawd, innit?
Cov neeg tsis ntseeg txhawj tias cov khoom sib xyaw ua ke uas muaj RAP siab yuav tawg thaum muaj cov khoom hnyav ntawm lub qag. Ib txoj kev tshawb fawb xyoo 2023 los ntawm Chang'an University tau taug qab txoj kev loj hauv xeev Shandong uas tau tsim nrog 48% RAP hauv txoj kev hnav. Tom qab 14.2 lab ESALs (cov khoom sib npaug ntawm ib lub qag), International Roughness Index tsuas yog nce 0.8 hli / km, qis dua 2.0 hli / km kev saib xyuas. Kev tshuaj xyuas me me qhia tau hais tias cov khoom siv rov ua dua tshiab muaj cov qauv sib piv (G *) rau PG 76-22 tshiab, ua tsaug rau cov khoom siv polymer-modified ntxiv ntawm 0.6% los ntawm qhov hnyav ntawm cov khoom sib xyaw. Kev txhais lus: txoj kev zoo li tshiab, tab sis tus nqi tsawg dua 28%.
Cov chaw tsim khoom sab hnub poob feem ntau hais tias lawv yuav tsum them tus nqi USD 5–6 lab rau lub Hoobkas rov ua dua tshiab kub 240 tph. Lub Hoobkas sib tov asphalt kub rov ua dua tshiab zoo sib xws hauv Suav teb yuav ze li ntawm USD 2.8 lab, txawm tias tom qab xa khoom thiab them se ntshuam los xij. Peb yam tseem ceeb ua rau muaj qhov sib txawv no:
Lagos State Public Works tau cog lus rau lub Hoobkas Suav 200 tph hauv Q1 2022, tsom mus rau 120 000 t ntawm kev sib xyaw rau txoj kev sib txuas ntawm tshav dav hlau. Tus nqi diesel: USD 0.92 ib liv; RAP muaj pub dawb los ntawm cov chaw ua haujlwm hauv zos. Tus neeg cog lus tau ua tiav 47% RAP cov ntsiab lus, txuag 31% ntawm bitumen thiab 22% ntawm cov pob zeb sib xyaw. Kev them rov qab tuaj txog hauv 14 lub hlis - tsis yog 10 xyoo theoretical uas koj hnov txog hauv cov lus hais hauv lub rooj sib tham. Ntxiv mus, CO₂ emissions poob qis 38%, pab tsoomfwv lub xeev ua tiav AfDB cov lus cog tseg qiv nyiaj. Tsis phem, huh?
Cov neeg yuav khoom ib zaug ntshai tias cov khoom siv Suav "pheej yig" txhais tau tias lub sijhawm tsis ua haujlwm ntau lub lis piam tos lub sensor 2 kg. Lub sijhawm tau hloov pauv lawm. Cov tuam txhab OEM saum toj kawg nkaus tam sim no ua haujlwm cov chaw khaws khoom hauv cheeb tsam hauv Nigeria, Peru, thiab Poland, khaws cia 90% ntawm cov khoom hloov pauv tau hauv cov khoom hauv zos. Lub VPN-enabled IoT module ntawm txhua lub Hoobkas xa telemetry mus rau Chengdu HQ; cov algorithms kwv yees qhia txog cov saw hlau elevator hnav 150 teev ua haujlwm ua ntej ua tsis tiav. Cov neeg siv khoom tau txais daim ntawv qhia pro-forma tsis siv neeg thiab tuaj yeem xaiv DHL Express lossis kev tuaj tos hauv zos. Lub sijhawm tsis ua haujlwm nruab nrab 1.8 teev rau txhua 1 000 teev ua haujlwm, sib npaug nrog cov hom European.
Ua ntej koj dhia mus rau ntawm lub bandwagon, xyuas cov lus qhia hauv zos. Hauv Fabkis teb, tus qauv NF P 98-150 txwv RAP ntawm 30% rau cov kev kawm ntawm qhov chaw, tab sis Lub Tebchaws Yelemees tso cai 50% yog tias cov khoom sib xyaw rov ua dua dhau qhov kev xeem Alkali-Silica Reactivity. Lub caij no, ntau lub xeev Asmeskas tseem flirt nrog 20% txwv. Cov xov xwm zoo: lub chaw sib xyaw ua ke kub asphalt hauv Suav teb tuaj yeem hloov ntawm 15% thiab 60% RAP los ntawm kev kho qhov ceev ntawm lub tshuab nqa thiab cov ntaub ntawv hlawv, yog li koj tseem ua raws li thaum lobbying rau cov qib siab dua.
| Cov Qauv | Txheem Suav 240 tph Cog |
|---|---|
| RAP ntau yam | 10–60 % |
| Kev siv roj | 5.2 kg diesel ib tonne sib tov @ 45% RAP |
| Kev lav dej noo | ≤0.3% hauv qhov sib tov kawg |
| Cog EI (Cov Ntsis Zog) | 142 MJ/t (ISO 15695) |
| Xa cov lej HS tawm | 8474.32 |
Nrog rau kev lag luam bitumen ntawm USD 520 ib tonne thiab cov aggregates nce 9% txhua xyoo, txhua feem pua ntawm RAP txuag tau kwv yees li USD 7.40 ib tonne ntawm kev sib tov. Lub Hoobkas 200 tph khiav 2 000 teev hauv ib xyoos tsim tau 400 000 t; ntawm 45% RAP, qhov ntawd yog USD 1.33 lab txuag tau txhua xyoo. Xam nrog cov nyiaj carbon thiab cov nqi hloov chaw pov tseg, thiab lub Hoobkas sib tov asphalt kub rov ua dua tshiab hauv Suav teb yuav dhau los ua cov khoom muaj nqis ROI ceev tshaj plaws hauv koj cov nkoj - tshwj tsis yog tias tus nqi roj poob qis dua USD 40, qhov xwm txheej txawm tias cov kws tshuaj ntsuam xyuas tsis zoo tshaj plaws txo nqi. Npaj txhij tham nrog tus lej nrog tus neeg muag khoom, lossis tseem tos cov thev naus laus zis "zoo meej" uas yuav tsis tuaj txog?