Cov Ntsiab Lus Melting Ntawm Bitumen: Cov Dej Kub Npau Npau Thiab Lub Teeb Nyem Thaum Ua Kom Sov Thiab Thaum Lub Raj Mis. Thaum Kub Npaum Li Cas Kev Tsim Kho Bitumen Cob Hluav Taws

2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2023-12-16 05:41

Paub txog qhov sib kis ntawm bitumen yog qhov tseem ceeb rau txhua tus neeg uas yuav siv nws. Cov ntsiab lus kub npau npau thiab cov ntsiab lus nyem thaum lub cua sov thiab txhaws yog qhov tseem ceeb heev hauv kev xyaum. Paub txog qhov ntsuas kub ntawm lub tsev bitumen cob hluav taws, ntau qhov xwm txheej tsis zoo tuaj yeem suav nrog.

Softening point rau ntau hom bitumen

Bitumen sib txawv hauv lawv cov khoom zoo heev. Qhov zoo ntawm cov khoom no feem ntau txiav txim siab los ntawm qib cua sov uas nws poob nws qhov tawv thiab dhau los ua yas ntau dua. Qhov ntsuas tseem ceeb siv rau kev ntsuas yog qhov hu ua kev nkag mus lossis nkag mus ntawm rab koob rau hauv cov khoom . Qhov tseeb tias, hloov chaw tshwj xeeb melting point, bitumen ua ntej mus txog muag muag, yog vim qhov tseeb tias lawv sib xyaw ntau yam tshuaj. Cov yam ntxwv ntawm cov khoom tshwj xeeb kuj cuam tshuam.

Nws tau pom tias bitumen yaj thaum rhuab ntawm 160 txog 200 degrees . Qhov ntsuas kub no yooj yim kom ua tiav txawm tias nyob hauv tsev ib txwm muaj. Nws yog qhov tsim nyog kom yaj cov tshuaj no hauv thaj chaw qhib hauv lub thawv hlau. Kev ua haujlwm yuav tsum ua kom deb ntawm txhua yam uas tuaj yeem yaj lossis ntxiv hluav taws. Peb yuav tsum tsis txhob hnov qab tias 160-200 degrees twb yog qhov kub thiab txias rau ib tus neeg, yog li koj yuav tsum tau ceev faj.

Nws tsim nyog nco ntsoov tias raws li qee qhov chaw, melting pib lawm ntawm 110 degrees. Qhov tseeb, nws tsis muaj peev xwm nrhiav pom qhov kev txiav txim siab no yog ua raws. Thaum npaj ua haujlwm hauv kev tsim kho lossis txhawm rau txhim kho ntau hom kev vov tsev vov tsev, tar feem ntau yog yaj.

Nws yaj lawm ntawm 12-55 degrees, uas ua rau nws muaj peev xwm npaj cov kua sib tov txawm tias dhau qhov hluav taws kub . Nws ua rau tsis nkag siab lub npe melting point ntawm bituminous cob cais los ntawm lwm cov khoom ntawm cov khoom - txhua yam zoo ib yam, nws tau ntsib hauv kev sim nkaus xwb; thaum lub raj mis hauv kev tsim khoom, koj yuav tsum tau coj, tau kawg, los ntawm qhov ntsuas kub ib yam uas twb tau tshaj tawm lawm.

Flash point

Tsis ntev los sis tom qab, txhua yam khoom muaj zog dhau mus rau hauv cov kua, thiab tom qab ntawd mus rau hauv cov pa roj. Thaum lub sij hawm yaj, tsis tsuas yog cov kua pib tshwm, tab sis kuj ua pa; qhov ntxiv cov tshuaj yaj (yog tias nws cov cua sov tsis nres), ntau cov pa no tso tawm. Lawv yog qhov zoo tshaj plaws uas lawv tuaj yeem tua hluav taws. Thiab lub xeev yog qhov tseem ceeb los ntawm qhov pom ntawm kev nyab xeeb hluav taws thaum lawv pib hlawv, txawm tias lawv tsis muaj peev xwm tswj tau cov txheej txheem tom qab cov cua sov tau raug tshem tawm. Cov kab hauv qab no yog:

• vapors ntawm cov khoom ua rau lub qhov hluav taws kub thaum tsim nyog yuav tsum tau qhia;
• cov txheej txheem tua hluav taws yog pom qhov muag pom;
• Txawm li cas los xij, sai li sai tau thaum cov cua sov raug tso tseg, cov nplaim taws ploj mus.

Qhov sov sov pes tsawg uas tuaj yeem tsim tau ob qho tib si los ntawm kev suav thiab los ntawm kev sim tshwj xeeb. Feem ntau, thaum suav, lawv tau ua raws li qhov ua kom lub siab nqus pa.

Txij li nws nyuaj heev rau ntsuas ncaj qha ntawm qhov kub ntawm cov pa lossis cov pa taws, qhov txiaj ntsig no feem ntau nkag siab raws li qhov ntsuas kub ntawm lub nkoj phab ntsa uas qhov kev tawm tsam tshwm sim . Qhov ntsuas no nyob ntawm qhov xwm txheej uas cov tshuaj nyob; tab sis qhov kub npau npau ntawm bitumen (ntawm qhov huab cua ib puag ncig thiab huab cua sov ib puag ncig) tau teeb tsa raws nraim - 145 degrees.

Brittleness kub

Raws li lub sijhawm no, nws yog kev coj ua kom nkag siab txog qib cua sov, thaum mus txog qhov twg ib yam khoom twg pib tawg los ntawm kev thov lub sijhawm luv ntawm lub nra. Qhov ntsuas no yog siv los txiav txim seb cov tshuaj yuav coj zoo li cas hauv txoj kev lossis lwm yam . Hauv oxidized bitumen, brittleness tshwm sim ntawm qhov kub qis dua li lwm hom. Kev ntsuas tus cwj pwm thauj khoom tau ua rau 11 vib nas this, qhov sib kis tau yog 1100 kg rau 1 cm2. Nyob ntawm qhov tshwj xeeb muaj pes tsawg leeg ntawm bitumen, qhov kub thiab txias ntawm qhov kub ntawm –2 txog -30 degrees.