Dab tsi yog Daim Ntawv Thov Txheej Txheem Ntawm Cov Khoom Siv Uas Siv Khoom

1. Daim ntawv thov tam sim no ntawm cov khoom sib xyaw ua ke

Ntau lub tuam txhab ua vaj tse siv cov tshuaj naphthalene-raws li dej reducers hauv kev tsim cov pob zeb uas tsis muaj zog (C10-C40), thaum lawv hloov mus rau polycarboxylate-based admixtures thaum tsim cov pob zeb ntawm qib C40 thiab siab dua. Qhov kev xaiv no yog txiav txim los ntawm ntau yam:

• Cov txheej txheem sib xyaw ntawm naphthalene-raws li admixtures yog qhov yooj yim, thiab qee cov nroj tsuag tuaj yeem sib xyaw naphthalene admixtures lawv tus kheej, txo cov nqi tsim khoom.
• Thaum lub sij hawm tsim khoom, naphthalene-raws li admixtures yog yooj yim los tswj. Thaum qhov ntau npaum li cas hloov pauv hauv qhov ntau ntawm ±0.2%, cov khoom vaj khoom tsev tsis hloov pauv loj, txhais tau hais tias muaj qhov hloov pauv loj dua rau cov khoom sib xyaw. Lawv kuj muaj qhov zoo adaptability rau cement. Thaum muaj kev hloov me ntsis ntawm cov dej noo lossis av nkos ntawm cov khoom sib xyaw, cov pob zeb tseem ruaj khov, thiab cov pob zeb qis-rau-nruab nrab yog qhov yooj yim los tsim.
• Tsawg-rau-nruab nrab lub zog pob zeb (C10-C40) tso nyiaj rau feem ntau ntawm kev lag luam xav tau, ua li ntawm 80% -90% ntawm tag nrho cov khoom tsim tawm hauv cov pob zeb sib xyaw ua ke, thaum cov pob zeb muaj zog muaj zog tsawg dua 10%. Cov laj thawj no ua rau muaj kev tswj hwm tam sim no ntawm naphthalene-based admixtures hauv kev lag luam.

Txawm li cas los xij, naphthalene-based admixtures muaj qee qhov kev txwv thaum tsim khoom thiab siv:

• Kev tsim cov naphthalene-raws li admixtures tsim qee yam tshuaj lom, uas tuaj yeem ua rau muaj kuab paug ib puag ncig.
• Thaum tsim muaj lub zog siab, siab-ntws pob zeb, lub zog thiab kev ua haujlwm yog qhov nyuaj rau lav. Vim muaj kev txwv ntawm cov dej-txo cov nyhuv, tus nqi ntawm cov cement siv hauv cov pob zeb muaj zog yog qhov loj. Qhob tov nrog naphthalene-raws li dej reducers ua tuab heev thiab nyuaj ua hauj lwm nrog. Yav dhau los, thaum naphthalene-raws li admixtures tau siv rau cov pob zeb ua kom muaj zog, kev tswj xyuas nruj ntawm cov dej thiab cov tshuaj sib xyaw ua ke yuav tsum tau ua kom muaj zog. Txawm li cas los xij, hauv kev xyaum, kev ua haujlwm ntawm cov pob zeb ua haujlwm tsis zoo, thiab qhov sib tov yog ob qho tib si nplaum thiab tuab. Txawm hais tias qhov fluidity tam sim no, nws tau qeeb, ua rau kev tsim kho qeeb qeeb thiab tsis txaus siab los ntawm cov neeg ua haujlwm ntawm qhov chaw. Kev siv cov tshuaj sib xyaw ntxiv tsis tau txhim kho qhov xwm txheej, thiab kev siv cov khoom siv ntau dhau tuaj yeem cuam tshuam rau lub pob zeb qhov chaw teeb tsa lub sijhawm thiab lub zog. Ntxiv dej tsis yog ib qho kev xaiv.

2. Cov yam ntxwv thiab kev txhim kho kev taw qhia ntawm Cov Txheej Txheem Tshiab Polycarboxylate Admixtures

Nrog rau txoj kev loj hlob sai ntawm kev tsim kho kev lag luam, kev xav tau ntau dua rau cov pob zeb ua kom muaj zog thiab kav ntev tau tshwm sim. Lub zog yog ib qho ntawm cov ntsiab lus tseem ceeb ntawm kev tsim cov cuab yeej technology. Vim muaj kev nrawm nrawm hauv nroog hauv Suav teb, cov neeg tsim khoom tau nce kev siv cov av hauv nroog, thiab cov tsev siab dua 100 meters tau dhau los ua ntau dua. Nyob rau tib lub sijhawm, cov qib zog ntawm cov pob zeb tau dhau los ntawm qib C40 ib txwm muaj, nrog C50, C60, thiab txawm tias muaj zog dua cov pob zeb siv. Ntau qhov kev coj ua hauv engineering tau pom tias kev siv cov pob zeb ua kom muaj zog tsis yog tsuas yog txo qhov loj ntawm cov qauv ntu, ua kom lub cev hnyav ntawm tus kheej, thiab txo cov khoom siv, tab sis kuj txhim kho lub tsev seismic tsis kam, txhim kho kev tsim kho, txo cov nqi tsim khoom, thiab ua tau raws li kev tsim kho tshwj xeeb.
Raws li cov pob zeb txuas ntxiv txhim kho nyob rau hauv kev coj ua kom muaj zog dua thiab ua haujlwm tau zoo, cov kev xav tau rau cov khoom siv raw, tshwj xeeb tshaj yog cov khoom sib xyaw, tau nce. Ib txwm naphthalene-raws li admixtures tsis tuaj yeem ua tau raws li cov kev xav tau no ntxiv lawm vim muaj kev txwv hauv cov txheej txheem tsim khoom thiab kev ua haujlwm tau zoo. Cov tiam tshiab ntawm polycarboxylate-raws li admixtures tau tsim sai heev thiab tau ua tiav hauv kev tsheb ciav hlau, choj, kev txuag dej, thiab lwm yam kev tsim vaj tsev ua vaj tse.

Piv rau naphthalene-raws li admixtures, polycarboxylate admixtures muaj peb qhov zoo hauv qab no:

• Ntau dua dej-txo tus nqi thiab zoo dua dispersion: Nrog tib tus nqi ntawm cov khoom sib xyaw, polycarboxylate-based admixtures tuav tib lub zog, slump, thiab flowability thaum txuag txog 10 kg dej. Qhov tseem ceeb ntawm kev txuag 10 kg ntawm dej ib cubic meter ntawm pob zeb yog to taub zoo nyob rau hauv kev lag luam - qhov no yuav txo tau kwv yees li 20 kg-30 kg ntawm cement. Nws qhov txiaj ntsig zoo tshaj plaws yog pom hauv cov pob zeb muaj zog, qhov twg cov cement tuaj yeem txo qis, txo cov nqi tsim khoom zoo. Qhov no tiag tiag ua tau raws li "peb qis" cov ntsiab lus ntawm cov cement qis, qis dej-cement piv, thiab cov ntsiab lus dej tsawg.
• Ib puag ncig tus phooj ywg: Polycarboxylate admixtures yog tsim los tsis siv cov stimulants muaj zog xws li formaldehyde los yog corrosive sulfuric acid heev, ua rau lawv ib puag ncig tus phooj ywg thiab ruaj khov.
• Kev siv dav dav thiab kev cia siab rau kev loj hlob: Polycarboxylate-raws li admixtures yog siv rau hauv tus kheej-compacting pob zeb, ncaj ntsej muag pob zeb, pob zeb muaj zog, siab-durability pob zeb, marine pob zeb, thiab prefabricated vaj tse. Lawv qhov zoo yog tsis tu ncua kev txhim kho. Vim lawv cov txiaj ntsig zoo, polycarboxylate-based admixtures tau dav thiab siv tau zoo hauv ntau thaj tsam ntawm Tuam Tshoj, tsim cov txiaj ntsig tseem ceeb thiab kev lag luam. Cov kev paub dhau los tau ua pov thawj tias kev nce qib thiab kev siv ntawm polycarboxylate admixtures yog ib qho yuav tsum tau muaj rau kev txhim kho cov pob zeb ua kom zoo rau kev ua haujlwm siab.