Ɔberɛfɛw da 20, afe 2025
Asphalt rejuvenation nyɛ ‘ngo a wɔde bɛka bitumen dedaw ho’ ara kwa. Saa asɛm yi hwehwɛ nnuru a wɔde yɛ adwuma no mu fi bitumen nhyehyɛe a akyɛ so kosi afuw mu adansedi so.
Mfiridwuma a wɔde yɛ asphalt foforo no anya nkɔso wɔ awo ntoatoaso abien mu. Ná ɔkwan a wɔfa so yɛ awo ntoatoaso a edi kan no yɛ tẽẽ: fraa ngo a wɔde hyɛ mu (te sɛ kerosene anaa distillates a emu yɛ hare) fra bitumen a ayɛ dedaw mu na ama nea ɛyɛ den no so atew denam honam fam nsu a wɔde hyɛ mu so. Saa kwan yi ho ka sua na ɛnyɛ den sɛ wɔde bedi dwuma, nanso ne haw ahorow no da adi saa ara — nneɛma nketenkete a ɛyɛ hare a ɛwɔ dilution oil no mu no san yɛ hyew bere a wɔde frafra na wɔreyɛ adwuma no, na ɛde onyin a ɛto so abien ba, na ɔkwan a wɔfa so no san yɛ den na ɛpaapae wɔ mfe 2-3 a wɔde ayɛ adwuma akyi. Awo ntoatoaso a ɛto so abien no yɛ molecule a wɔsan yɛ no foforo: sɛ́ anka ɛde ne ho bɛto honam fam dilution so no, ɛde nsiyɛ siesie molecule nhyehyɛe a ɛwɔ bitumen a akyɛ no mu denam nnuru so — ɛsan hyɛ molecule mu duru pɔtee bi a ɛyɛ hare ma de san de colloidal kari pɛ, ɛpaapae oxidative cross-link bonds mu ma ɛtew molecule akɛse a wɔaboaboa ano no kɛse so, na ɛde stabilizers ba de siw ano bitumen a wɔayɛ no foforo no a wɔsan yɛ no kristal. Asphalt rejuvenator a FangService boa no yɛ awo ntoatoaso a ɛto so abien molecule regeneration mfiridwuma yi dea.
Sɛ obi bɛte molecule a ɛsan yɛ foforo ase a, ɛsɛ sɛ odi kan te sɛnea bitumen yɛ colloidal no ase. Bitumen nyɛ aduru a ɛnyɛ den na mmom ɛyɛ colloidal dispersion a ɛyɛ den a ɛwɔ afã atitiriw anan: asphaltene (molekyule mu duru a ɛkorɔn sen biara, polarity a ɛyɛ den sen biara, entumi nwura n-hexane mu), saturate (ɛnyɛ polar, molecule mu duru a ɛba fam sen biara), aromatic (polarity a ɛkɔ fam, molecule mu duru a ɛwɔ mfinimfini), ne resin (polar, molecule mu duru a ɛda asphaltene ne aromatic ntam). Wɔ bitumen a wɔayɛ no foforo mu no, wɔde resin molecules kata asphaltene cores so na wɔde sɛn saturates ne aromatics a ɛkɔ so daa mu, na ɛyɛ sol-gel nhyehyɛe a ɛyɛ den. Wɔ onyin mu no, ngo (saturates + aromatics) kɔ so tew, resins condense na ɛdannan asphaltenes wɔ oxidation ase, asphaltene aggregates nyin, na colloidal nhyehyɛe no dan fi sol kɔ gel — hwere mfiri tumi nyinaa a ɛboro nsu a ɛsen.
Asphaltenes a ɛwɔ bitumen a akyɛ mu nni hɔ sɛ molecule ankorankoro — ɛnam π-π stacking ne hydrogen bonding so yɛ nanoscale aggregates, na saa aggregates yi kɔ so bata micron-scale clusters mu. Bere a onyin kɔ so no, asphaltene a wɔaboaboa ano no mu molecule nhyehyɛe no yɛ nea wɔahyehyɛ no yiye, na ɛyɛ mmeae a ɛte sɛ ahwehwɛ — adeyɛ a wɔfrɛ no de-crystallization anaa nhyehyɛe. Saa mmeae a wɔahyehyɛ no nnidiso nnidiso yi na ɛde brittleness ba tẽẽ: ɛbɛyɛ mmeae a nhyɛso a ɛwɔ mu wɔ ɔhyew a ɛba fam mu, na ɛma bitumen no fa brittle fracture wɔ ɔhyew a ɛboro ne glass transition temperature so koraa. Nneɛma a ɛyɛ nnam a ɛwɔ molecule rejuvenator no mu betumi de ahyɛ π-π stacking layers of asphaltene aggregates ntam, asɛe nhyehyɛe a wɔahyehyɛ wɔ molecule ahorow ntam no na asan apete crystalline mmeae no akɔ tebea a apete a ɛnyɛ nsɛ mu. Eyi nyɛ dilution a ɛyɛ mmerɛw — ɛde nnam sesa aggregation tebea nhyehyɛe a asphaltene no.
Asɛnnennen titiriw a ɛwɔ molecule ahorow a wɔsan yɛ no foforo mu ne sɛ ebia colloidal nhyehyɛe a wɔasiesie no bɛsan anyin bere a wɔde sie na wɔresom no anaa. Mmuae no ne yiw, a enni stabilizers. Bitumen a wɔayiyi ahwehwɛ foforo na wɔde hann-afã ahyɛ mu ma no wɔ tebea a ɛnyɛ nea ɛyɛ den wɔ ɔhyew mu, na asphaltene asinasin no wɔ su a ɛsan boaboa ano na ɛsan hyehyɛ. Steric-hindrance resin di ɔhaw yi ho dwuma: saa resin molecule ahorow yi kura nkɔnsɔnkɔnsɔn akuw akɛse a ɛwɔ nkyɛnkyɛn a sɛ wɔtwetwe kɔ asphaltene asinasin no ani a, ɛyɛ honam fam akwanside a ɛmma asphaltene asinasin a ɛbɛn ho no ntumi nkɔ na ɛsan nhyɛ mu bio. Ɛte sɛ nea wɔde anti-static spray redi dwuma wɔ ti nhwi a wɔabɔ no foforo so — nhama no ntumi nkɔ so bio na ɛkɔ so petepete. Steric-hindrance resin a wɔde ba no ma bitumen a wɔayɛ no foforo no sie a ɛyɛ den no tu mpɔn kɛse: wɔ nnɔnhwerew 48 akyi wɔ fononoo a ne kɛse yɛ 160°C mu no, wobetumi adi nsonsonoe a ɛwɔ baabi a ɛyɛ mmerɛw no so wɔ 2°C mu (mpɛn pii no nnwumayɛbea nhyiam hwehwɛ sɛ ɛnyɛ nea ɛboro 5°C).
Amanneɛ kwan so dilution-oil rejuvenation betumi asan de bitumen a abɔ akora no adwumayɛ aba sɛnea bitumen a ɛyɛ foforo te no nkutoo — eyi yɛ botae a wɔde tua ka. Nanso molecule rejuvenator a efi FangService kɔ akyiri: ɛwɔ ade a ɛyɛ adwuma a ahintaw a ɛne mmeae a ɛyɛ adwuma wɔ bitumen no mu yɛ adwuma wɔ nnuru mu wɔ ɔhyew a ɛfrafra mu, wɔ beae a ɛwɔ hɔ no yɛ afã abiɛsa a ɛyɛ cross-linked network. Saa ntam yi nsan mfa nsuo mma — nea ɛne no bɔ abira koraa: ɛde elastic cross-links a ɛyɛ mmerɛw ba colloidal nhyehyɛe a wɔasiesie no mu, na ɛma bitumen a wɔayɛ no foforo no tumi san nya ahoɔden a ɛboro bitumen a ɛyɛ foforo de no so. Titiriw: nea edi kan no, 3D ntam nkitahodi no ma viscoelasticity tu mpɔn, na ɛma kwan no tumi twetwe nhyɛso ahorow a ɛwɔ adesoa ase yiye na ɛkyekyɛ; nea ɛto so abien no, ntam nhyehyɛe no hyɛ abusuabɔ a ɛda bitumen ne aggregate interface ntam no mu den, na ɛtew asiane a ɛwɔ hɔ sɛ nsu sɛe no so; nea ɛto so abiɛsa no, cross-linked nhyehyɛe no ma bitumen no tumi sa ne ho kodu baabi — micro-mpaapaemu betumi atoto fã bi a entrɛw bere a ɔhyew kyinhyia no. Nsɛm a wɔasusuw kyerɛ sɛ ɔbrɛ nkwa nna a ɛwɔ asphalt a wɔde afrafra a wɔayɛ no foforo mu no du bɛboro 85% wɔ asphalt a ɛnyɛ ɔbaabun de no mu, na wɔ tebea horow bi mu no ɛbɛn 100%.
Ɛsɛ sɛ wɔkyerɛ sɛnea molecule ahorow a wɔsan yɛ no tu mpɔn no dodow wɔ aduruyɛdan mu. Wɔ asphalt rejuvenators ho no, ɛsɛ sɛ wɔsɔ nsɛnkyerɛnne atitiriw anum hwɛ. Nea edi kan no, sɛnea ɛkɔ mu: ɛda bitumen a ɛyɛ den adi; botaeɛ a wɔde yɛ mmeranteɛbereɛ no taa yɛ sɛ wɔbɛsan de bitumen a akyɛ no akɔ mu akɔ bɛboro 80% wɔ bitumen a ɛyɛ foforɔ de no mu. Nea ɛto so abien, ade a ɛyɛ mmerɛw: ɛda ɔhyew a ɛkɔ soro a ɛyɛ den adi; bere a wɔayɛ no foforo akyi no, ɛsɛ sɛ baabi a ɛyɛ mmerɛw no ne bitumen a wɔayɛ no foforo no hyia, na nsonsonoe no ntra 3°C. Nea ɛto so abiɛsa, ductility: ɛda ɔhyew a ɛba fam a ɛko tia mpaapaemu adi; 5°C ductility ne ade titiriw a ɛkyerɛ na ɛsɛ sɛ ɛsan kɔ bɛboro 70% wɔ bitumen a ɛyɛ foforo bo mu. Nea ɛtɔ so nnan, nsunsuansoɔ: Ɛsɛ sɛ Brookfield nsunsuansoɔ a ɛwɔ 135°C no yɛ kɛseɛ sɛdeɛ bitumen a ɛyɛ foforɔ teɛ, na ɛhwɛ ma ɛyɛ yie sɛ wɔbɛfrafra na wɔabɔ no. Nea ɛto so anum, RTFOT akyi adwumayɛ: ɛsɛ sɛ bitumen a wɔayɛ no foforo no nya nkwa wɔ Rolling Thin Film Oven Test no mu a adwumayɛ no nsɛe kɛse — nsakrae kɛse wɔ ±3% mu ne onyin akyi penetration ratio anyɛ yiye koraa no 0.7. Rejuvenator a ɛfiri FangService no yɛ adwuma yie wɔ nsɛnkyerɛnneɛ anum no nyinaa mu: nsusuiɛ a ɛtaa ba no bi ne 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%.
Ɛsɛ sɛ wɔde afuw mu mfiridwuma ho nsɛm di aduruyɛdan mu nsɛm a eye kyɛn so di ho adanse. Mmabun foforoyɛ adwuma a RAP kɛse wom a wɔtaa yɛ no bi ne anammɔn a edidi so yi a wɔde di adanse. Nea edi kan no, afifide a wɔhwɛ so: wɔfa nhwɛsode bere a wɔrefrafra no de hwɛ sɛnea ɔhyew no yɛ pɛ ne bitumen a wɔde akata so, hwɛ hu sɛ rejuvenator no apete koraa wɔ 120-140°C. Nea ɛto so abien, paving ne compaction monitoring: wɔkyerɛw compaction temperature, dodow a ɛtwam, ne density a etwa to na wɔde toto ho wɔ ɔkwan a ɛne hot-mix ɔfã a wɔtaa yɛ no so. Nea ɛto so abiɛsa, core sampling: bere a wɔayɛ pavement curing akyi no, wotu core na wɔsɔ hwɛ sɛ ɛyɛ density, void ratio, ne Marshall stability. Nea ɛto so anan, bere tenten adwumayɛ sohwɛ: wɔde sensor ahorow ahyɛ mu anaasɛ wɔde nsɛntitiriw a wɔahyɛ no agyirae asi hɔ wɔ sɔhwɛ fã no so, na nhwehwɛmu a wɔyɛ daa no di sɛnea ɛyɛ petee, mpaapaemu dodow, ne rut no mu dɔ akyi. Tracking data a efi sɔhwɛ ɔfã bi a 60% RAP wɔ mfe abien mu nkyerɛ nsonsonoe titiriw biara wɔ ɔsom adwumayɛ mu sɛ wɔde toto amanne kwan so ɔhyew afrafra, bere a afe a ɛto so abiɛsa no, ɔfã a wɔayɛ no foforo no fi ase kyerɛ ɔbrɛ adwumayɛ mu mfaso — eyi te saa efisɛ elastic recovery tumi a bitumen a wɔayɛ no foforo no kɔ so de mfaso ma wɔ bere tenten adesoa cycling ase.
Wɔ wɔn a wɔtɔ akwan ho mfiridwuma fam no, nea wɔpaw no yɛ ade titiriw a wɔde di gua wɔ akwan abiɛsa a wobetumi afa so no mu. Ɔkwan A: fa bitumen a ɛyɛ foforo 100% ne virgin aggregate (0% RAP) di dwuma — ɛka a wɔbɔ wɔ mfiase no a ɛkorɔn sen biara, mfiridwuma mu asiane a ɛba fam koraa. Ɔkwan B: fa dilution oil di dwuma de san yɛ 20-30% RAP — mfitiaseɛ ka a ɛba fam koraa, nanso bere tenten adwumayɛ yɛ nea asɛm wɔ ho na ɛka a wɔde ka ho no dodoɔ ntumi ntra 30%. Ɔkwan C: fa molecule rejuvenator di dwuma na ama woanya 60%+ RAP — mfiase ɛka a wɔbɔ wɔ A ne B ntam, nanso asetra mu ka a ɛba fam koraa, carbon a wɔtow gu a ɛba fam koraa, ne ahoɔden a ɛko tia nyarewa wɔ nneɛma a wɔde ma a wɔaka abom no mu nsakrae ho. Wɔ akwan ho nnwuma a ɛwɔ nhyehyɛɛ nkwa nna yɛ mfeɛ 3+ no, Option C nkwa nna mu ɛka ho mfasoɔ yɛ kɛseɛ. Wɔ bere tiaa mu anaa ntɛmpɛ adwuma ho no, Ɔkwan B da so ara wɔ baabi. Ade titiriw a ɛwɔ gyinaesi a ɛfa adetɔ ho no nyɛ ‘ɔkwan bɛn na eye sen biara’ na mmom ‘dɛn ne adwuma yi nhyehyɛe nkwa nna, so wɔde carbon a wɔtow gu no bɛka ho wɔ bid evaluation mu, na so ne nyinaa a wɔde ma no gyina pintinn’ — nsɛmmisa abiɛsa yi ho mmuae twe adwene si ɔkwan a eye sen biara so tẽẽ.
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 ɔhyew 120-140°C, ɔbrɛ nkwa >=85% foforo asphalt, 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 →