Ɔberɛfɛw da 10, afe 2023
U.S. na ɛwɔ RAP a ɛso sen biara wɔ wiase. Saa asɛm yi hwehwɛ sɛnea asphalt a wɔma ɛyɛ foforo no ma mfaso ba U.S. gua so ne sɛnea amannɔnefo a wɔde nneɛma ma no betumi akɔ mu no mu.
United States na ɛwɔ RAP a ɛso sen biara wɔ wiase. Sɛnea Federal Highway Administration (FHWA) kyerɛ no, U.S. yɛ RAP bɛyɛ tɔn ɔpepem 60 afe biara, a emu bɛyɛ 75% yɛ nea wɔsan de di dwuma bio. Eyi ma U.S. yɛ ɔman a ɛyɛ RAP a ɛsen biara ne nea ɔde di dwuma sen biara wɔ wiase. Nanso, dwumadie dodoɔ no da so ara wɔ baabi a ɛbɛma nkɔsoɔ — wɔ aman pii mu no, RAP mu nsɛm da so ara yɛ 20-30%, berɛ a 60%+ yɛ mfiridwuma mu nkɔsoɔ. Akwanside titiriw a ɛmma RAP mu nneɛma nkɔ soro no nyɛ mfiridwuma na mmom ahyehyɛde ne sikasɛm: nea edi kan no, mfiridwuma gyinapɛn a ɛnhyia wɔ aman ahorow mu, a aman binom gyinapɛn ahorow a wogye tom ma RAP mu nsɛm a ɛkɔ soro no da so ara di RAP a ɛba fam apam ahorow akyi; nea ɛto so abien, RAP bo ho nhyehyɛe a ɛnyɛ pɛ — wɔ mmeae bi no, RAP a wɔde ma no boro mpɔtam hɔ ahiade so na nneɛma bo kɔ fam sen ne bo a wɔde besi ananmu; nea ɛto so abiɛsa, kontraktafo asiane a wɔmpɛ — adwumayɛ a wontumi nsi pi wɔ nneɛma a ɛwɔ RAP a ɛkorɔn mu no ma adwumayɛfo a wɔyɛ adwuma wɔ hɔ no ani gye nhyehyɛe ahorow a ɛyɛ katee ho.
FHWA tintim ‘Asphalt Rejuvenators for High-RAP Mixtures’ akwankyerɛ (FA HWA-NHI-16-011) wɔ afe 2019 mu, a ɛde mfiridwuma kwan a ɛda adi pefee a ɛfa mmara sodi ho ma wɔ high-RAP recycling ho. Nyansahyɛ titiriw bi ne: nea edi kan no, ɛsɛ sɛ rejuvenator nhwehwɛmu gyina adwumayɛ so sen sɛ egyina nea wɔahyehyɛ so — a ɛtwe adwene si bitumen a ɛkɔ mu wɔ rejuvenation akyi, softening point, ductility, ne RTFOT akyi adwumayɛ so nea ɛto so abien, wɔkamfo kyerɛ sɛ wɔmfa ‘blending chart’ akwan nni dwuma mfa nhwɛ sɛnea bitumen a wɔayɛ no foforo ne nea wɔasan de adi dwuma no tumi afrafra; nea ɛto so abiɛsa, ɛkamfo ɔbrɛ ne ɔhyew a ɛba fam adwumayɛ sɔhwɛ a ɛwɔ afrafrade a wɔasan de adi dwuma no kyerɛ; nea ɛto so anan, hyɛ nkuran sɛ wɔmfa mfiridwuma a wɔde fra nneɛma a ɛyɛ hyew nni dwuma na ama ɔhyew a wɔde frafra mu ne mframa a wɔtow gu no so atew. Wɔ amannɔnefoɔ a wɔde nneɛma ma no fam no, FHWA akwankyerɛ no de nkrasɛm a emu da hɔ kɔma: gua a wɔbɛnya ama rejuvenators no gyina adwumayɛ ho nsɛm so, na ɛnyɛ ɔman a wɔfiri mu. Wɔyɛɛ rejuvenator a ɛfiri FangService no a na FHWA akwankyerɛ ahwehwɛdeɛ wɔ wɔn adwenem — 25°C viscosity a ɛyɛ 280 mPa·s, flash point a ɛyɛ 231°C, RTFOT viscosity ratio a ɛyɛ 1.1, ne RTFOT mass nsakraeɛ a ɛyɛ 0.9% — ne nyinaa hyia FHWA akwankyerɛ no kwan a wɔkamfo kyerɛ no.
U.S. RAP bo ho nhyehyɛe no yɛ soronko wɔ Europa de no ho. Wɔ U.S. no, wɔtaa gyina mpɔtam hɔ nneɛma a wɔde ma ne nea wɔhwehwɛ so na ɛkyerɛ RAP bo sen sɛ wɔde bo a wɔde besi ananmu. Wɔ mfinimfini ne atɔe fam aman mu (te sɛ Texas, California), RAP a wɔde ma no dɔɔso na ne bo betumi ayɛ nea ɛba fam te sɛ $15-25 wɔ ton biara mu — bere a aggregate a wɔayɛ no foforo betumi abɔ $40-60 wɔ ton biara mu. Saa nsonsonoeɛ a ɛwɔ boɔ mu yi kyerɛ sɛ ɛnyɛ sɛ RAP a wɔde di dwuma no ma wɔkora nneɛma ho ka so nko, na mmom ɛkwati ɛka a wɔbɔ wɔ aboɔden aboɔ a wɔaboaboa ano a wɔmfa nyɛ hwee ne akwantuo ho nso. Bio nso, U.S. bitumen bo taa yɛ dɔla 500-700 wɔ tɔn biara mu, bere a bo a wɔde besi bitumen dedaw a ɛwɔ RAP no ananmu no sua koraa sen saa bo no. Sɛ wɔde rejuvenator di dwuma de ma RAP dodoɔ kɔ soro firi 30% kɔsi 60% a, ɛmma wɔkora bɛyɛ 30-40 kg a ɛyɛ bitumen foforɔ wɔ afrafradeɛ tɔn biara mu, na ɛkyerɛ aseɛ kɔ bɛyɛ $15-28 wɔ tɔn biara mu wɔ sika a wɔkora so wɔ mprempren boɔ mu. Wɔ adwuma a emu duru yɛ tɔn 100,000 mu no, eyi nkutoo ma wɔkora dɔla ɔpepem 1.5-2.8 so wɔ bitumen ho ka mu.
Wɔ Texas I-35 akwan akɛseɛ a wɔbɛsan asiesie adwuma bi mu no, Texas Department of Transportation (TxDOT) faa RAP a ɛkorɔn ano aduru a wɔde san yɛ foforɔ a RAP 60% wom. Nsɛm titiriw: nea edi kan no, na RAP fi asphalt surfacing a wɔde sii hɔ mfe 20 a atwam no mu, a wɔde TxDOT’s grading system dii dwuma; nea ɛto so abien no, na rejuvenator dodow yɛ 10% wɔ bitumen dodow a ɛwɔ RAP no mu, na rejuvenation akyi penetration san fii 25 dmm koduu 50 dmm (virgin bitumen yɛ 55 dmm); nea ɛto so abiɛsa no, ɔhyew a wɔde frafra mu no so tew fii 175°C koduu 125°C, na ɛmaa pɛtro a wɔde di dwuma no so tew bɛyɛ 30%; nea ɛto so anan no, adwuma no ho ka nyinaa sua bɛyɛ 32% sen ano aduru a wɔde fra ɔhyew a wɔtaa de di dwuma no, na sika a wonyae wɔ carbon boseabɔ mu no bɛyɛ dɔla 500,000. Nea ɛho hia wɔ asɛm yi mu ne sɛ ɛkyerɛ sɛ wɔ ahyehyɛdeɛ nhyehyɛeɛ a ɛwɔ U.S. aban akwan akɛseɛ mu no, ɛnyɛ mfiridwuma mu nko ara na RAP a ɛkorɔn a wɔbɛsan ayɛ no foforɔ no yɛ nea ɛbɛtumi ayɛ yie na mmom ɛyɛ sikasɛm mu mfasoɔ nso — TxDOT mfiridwumayɛfoɔ kyerɛɛ sɛ sɛ wɔde sika a wɔnya wɔ carbon boseabɔ ne nsiesie kyinhyia ntrɛmu a wɔkora so no to adwuma no sikasɛm mu a, ɛka a wɔbɔ nyinaa no sua bɛboro 40% sene ɔkwan a wɔtaa fa so no.
Wɔ amannɔne asphalt rejuvenator a wɔde ma a wɔrehwehwɛ sɛ wɔbɛhyɛn U.S. gua so fam no, akwan a wɔfa so di mmara so ne aguadi akwan hia nhyehyɛe a wɔahyehyɛ. Nea edi kan, mfiridwuma ho adansedi — siesie mfiridwuma ho nkrataa ne sɔhwɛ ho nsɛm sɛnea AASHTO ne FHWA ahwehwɛde ahorow te, a nhwehwɛmu a wɔde wɔn ho yɛ a U.S. agye atom aduruyɛdan ahorow (te sɛ AASHTO Materials Verification Laboratories) bɛyɛ. Nea ɛtɔ so mmienu, mpɔtam hɔ adwumayɛbea — ne U.S. asphalt a wɔde ma anaa wɔn a wɔkyekyɛ no bɛyɛ adwuma abom de adi wɔn adetɔfoɔ nkitahodiɛ ne nneɛma a wɔde kɔ baabiara a ɛwɔ hɔ dada no ho dwuma. Nea ɛtɔ so mmiɛnsa, nhwehwɛmu adwuma — ne ɔman DOT (te sɛ TxDOT anaa Caltrans) yɛ adwuma bom de wie nhwehwɛmu adwuma bi, boaboa US-mpɔtam mfiridwuma ho nsɛm ne adwumayɛ ho kyerɛwtohɔ ano. Nea ɛtɔ so nnan, nnwumakuo fekuo kyɛfa — kɔka National Asphalt Pavement Association (NAPA) anaa ASTM International ho na fa wo ho hyɛ nnwuma gyinapɛn nkɔsoɔ ne mfiridwuma mu nsakraeɛ mu. Wɔ anammɔn anan yi akyi no, amannɔne nneɛma a wɔde ma no fata sɛ wɔde wɔn ho hyɛ ɔmanfo aguadi mu wɔ U.S. gua so. Nhumu titiriw ne sɛ U.S. gua no yɛ nea ‘mfiridwuma na ɛde ba’ — bere tenten a adwumayɛ ho nsɛm mu yɛ den sɛnea ɛsɛ no, amannɔne nneɛma betumi ne mpɔtam hɔ nneɛma a wɔyɛ no asi akan. Nea ɛnte sɛ Europa gua no, ahyehyɛde akwanside ahorow a ɛwɔ hɔ ma wɔn a wɔnyɛ mpɔtam hɔfo a wɔde nneɛma ma wɔ U.S. gua so no sua koraa. View the Asphalt Rejuvenator Supplier
Ka wo project scenario ne ahwehwɛdeɛ kyerɛ yɛn, na yɛbɛma ano aduru a ɛfata no ahyia na yɛde quote ama wɔ nnɔnhwereɛ 24 ntam.
Nya Quote a Wɔde Ma Kwa3-wɔ-1 asphalt rejuvenator (ɔhyew afrafra + nsakrae + regeneration), RAP content >=60% (maximum 100%), afrafra hyew 120-140°C, ɔbrɛ nkwa >=85% asphalt foforo, ne nyinaa ka 25-40% a ɛba fam. Viscosity 280 mPa·s, flash point 231°C, density 0.96 g/cm3, ɛwɔ 25 kg anaa 1000 kg sankuo mu. Boa customized formulas on demand na fa batch testing amanneɛbɔ ma, a optional aguadi nsɛm a ɛyɛ EXW/FOB/CIF/DDP.
Sua asphalt regeneration agent a wɔpaw ne nsɛm a wɔafa aka ho ade →