Lub hauv paus ntsiab lus ntawm lub caij ntuj no pob zeb engineering kev tsim kho yog dab tsi?
Jul 31, 2024Tso lus
Yog vim li cas yog vim li cas cov pob zeb sib tov maj mam condense thiab hardened tom qab pouring, kom txog rau thaum lub zog tau txais yog vim lub tshwm sim ntawm cement hydration. Kev ceev ntawm cov cement hydration yog cuam tshuam nrog cov pob zeb nws tus kheej cov khoom siv thiab kev koom tes sib piv, uas feem ntau hloov nrog qhov kub thiab txias. Thaum qhov kub thiab txias nce, cov nyhuv hydration yog nrawm dua, thiab cov kua qaub loj hlob sai dua; thiab thaum kub poob mus rau O degree C, ib feem ntawm cov dej hauv cov pob zeb pib khov, thiab maj mam hloov los ntawm cov kua theem (dej) mus rau cov theem khoom theem theem theem theem -kem theem theem theem theem theem. (ice). Lub sijhawm no, cov dej koom nrog hauv cement hydration raug txo. Yog li ntawd, hydration slows down, thiab kev siv zog loj hlob qeeb qeeb. Qhov kub thiab txias tseem poob qis. Thaum cov dej hauv cov pob zeb ua tiav hloov mus rau hauv dej khov, uas yog, thaum lub sijhawm ua kua tiav dhau los ua ib theem khoom, cov dej ntawm cov cement pib nres, thiab lub zog tsis nce rau lub sijhawm no.
Tom qab cov dej dhau los ua dej khov, qhov ntim tau nce li ntawm 9%, thiab qhov kev ntxhov siab nthuav tawm txog li 2500kg / square centimeter yog tsim. Qhov kev ntxhov siab no feem ntau ntau dua li qhov pib siv tus nqi tsim nyob rau hauv lub pob zeb cement, kom cov pob zeb puas tsuaj (uas yog, kev puas tsuaj thaum ntxov) kom txo tau qhov kev siv. Tsis tas li ntawd, thaum dej dhau los ua dej khov, nws tseem yuav tsim cov khoom loj nrog cov khoom loj ntawm cov khoom sib sau ua ke thiab kev txhawb nqa kom tsis muaj zog ntawm cov cement slurry thiab aggregate thiab steel tuav, uas yuav cuam tshuam rau lub zog compressive ntawm cov pob zeb. Thaum Bingling melts, ntau qhov sib txawv yuav tsim nyob rau hauv cov pob zeb, thiab qhov ntom thiab durability ntawm cov pob zeb yuav raug txo.
Nws tuaj yeem pom tau tias hauv kev tsim cov pob zeb hauv lub caij ntuj no, kev hloov pauv ntawm cov dej yog qhov tseem ceeb rau kev cuam tshuam lub zog ntawm pob zeb. Ntau tus kws tshawb fawb hauv tsev thiab txawv teb chaws ua ntau qhov kev sim dej hauv cov dej hauv cov pob zeb. Cov txiaj ntsig ntawm txoj kev tshawb fawb qhia tau hais tias muaj lub sij hawm ua ntej kev laus ua ntej cov dej khov rau cov pob zeb, uas tuaj yeem ua rau nws cov theem ua kua sab hauv, txo cov theem khoom, thiab ua kom cov dej ntawm cov cement. Cov kev tshawb fawb soj ntsuam kuj qhia tau hais tias ntev dua lub sij hawm ua ntej-pre-nourishment ntawm pob zeb yog khov, qhov me dua lub zog poob.
Tom qab cov pob zeb tau khov lawm (uas yog, nyob rau hauv qhov kub thiab txias), nws yuav tsum tau khaws cia, thiab nws qhov kev siv yuav nce ntxiv, tab sis qhov loj ntawm kev loj hlob txawv. Rau lub sijhawm ntev ua ntej kev saib xyuas, tom qab cov pob zeb uas muaj kev siv siab (xws li 35% ntawm R28) yog khov, qhov kev siv ntawm lub sijhawm tom qab yuav luag tsis poob. Rau lub sij hawm luv luv ntawm kev ruaj ntseg, cov pob zeb uas muaj kev siv zog tsawg nyob rau theem pib yog khov, thiab qhov kev siv zog tsis muaj qhov poob hauv theem tom ntej. Nws tuaj yeem pom tau tias ua ntej cov pob zeb khov, nws yuav tsum muaj lub sijhawm ua ntej noj zaub mov ntawm qhov kub thiab txias kom nrawm cov dej ntawm cov cement thiab ua kom cov pob zeb kom tau txais qhov qis qis ntawm kev puas tsuaj. Feem ntau, qhov kev siv tseem ceeb tuaj yeem ua tiav qhov kev xav tau. Hais txog qhov tseem ceeb heev, txoj cai ntawm ntau lub teb chaws tsis tos. kuv lub teb chaws tau teev tseg tias nws yuav tsum tsis pub tsawg dua 30% ntawm daim ntawv lo, thiab yuav tsum tsis pub tsawg dua 35 kg ib square centimeter.
• Kev puas tsuaj ntawm cov pob zeb khov khov:
1. Txo cov pob zeb ua kom muaj zog
2. Ua pob zeb tawg
3. Cov xeb ntawm qhov cuab lub zog hauv pob zeb
4. Txo qhov ntev ntawm cov pob zeb
• Cov ntsiab cai dav dav ntawm kev tiv thaiv kev puas tsuaj khov khov:
1. Txo cov dej haus
2. Txhim kho qhov kev siv zog thaum ntxov
3. Txo qhov chaw khov dej
4. Lub siab ntawm "buffering" dej khov nyob rau hauv cov qauv ntawm cov pob zeb
5. Txo cov kev hloov pauv ntawm qhov ntim ntawm pob zeb
• Lub mechanism ntawm lub pob zeb antifreeze:
1. Dej txo cov khoom xyaw hauv cov tshuaj tiv thaiv kab mob: Txo cov pob zeb sib xyaw dej thiab ua kom muaj zog ntawm cov pob zeb; cov ntsiab lus ntawm cov dej dawb nyob rau hauv lub hydrophobic qhob tov khoom, txo lub caij nyoog ntawm kev puas tsuaj khov.
2. Cov khoom xyaw muaj zog thaum ntxov hauv kev ua kom tsis muaj zog: nce lub zog thaum ntxov ntawm cov pob zeb, kom cov pob zeb ua kom muaj zog tshaj qhov tseem ceeb ua ntej cov dej khov, txo cov dej khov ntawm cov pob zeb ua kom muaj zog.
3. Cyclax cov khoom xyaw hauv cov tshuaj tiv thaiv kab mob: Cov khoom sib xws, ruaj khov thiab kaw cov npuas me me, txo qhov ntim cov kev hloov pauv los ntawm cov dej mus rau dej khov rau lub siab thiab qhov ntim hloov pauv los ntawm cov pob zeb.
• Kev txwv tsis pub siv kub ntawm cov tshuaj tiv thaiv kab mob:
1. Cov nyhuv zoo kub ntawm antifreeze
2. Qhov tseeb "cov nyhuv kub" ntawm cov tshuaj tiv thaiv kab mob ntawm cov pob zeb ua qauv
3. Cov kev cai ntawm qhov kub ntawm cov tshuaj tiv thaiv kab mob muaj feem xyuam rau qhov kub thiab txias
• Lub luag hauj lwm ntawm cov pob zeb tiv thaiv kab mob:
1. Lub antifreeze sai txhim kho kev siv thaum ntxov.
2. Antifreeze tsis tuaj yeem hloov pauv txoj cai ntawm pob zeb ntawm qhov kub thiab txias.
3. Cov nyhuv ntawm antifreeze doping ntawm lub zog ntawm pob zeb.
