Hnub Kawg: Lub Peb Hlis 7, 2022
Ob peb xyoos dhau los, kev tsim kho kev lag luam tau ntsib kev loj hlob thiab kev loj hlob zoo heev. Qhov no tau tsim nyog rau txoj kev loj hlob ntawm niaj hnub admixtures thiab additives. Additives thiab admixtures rau pob zeb yog cov tshuaj lom neeg ntxiv rau pob zeb los txhim kho nws lub cev thiab tshuaj lom neeg. Cov khoom no sawv cev rau ntau cov khoom lag luam nrog ntau yam tshuaj lom neeg.
Lub ntsiab sib txawv ntawm admixtures thiab additives yog cov theem uas cov tshuaj ntxiv rau pob zeb los yog cement. Cov khoom ntxiv tau ntxiv rau hauv cov txheej txheem tsim cov cement, thaum ntxiv cov khoom sib xyaw ua tiav thaum ua cov pob zeb sib xyaw.
Dab tsi yog Additives?
Cov khoom siv ntxiv yog ntxiv rau cov cement thaum tsim khoom los txhim kho nws cov khoom. Feem ntau, cov khoom siv raw hauv kev tsim cov cement muaj xws li alumina, txiv qaub, hlau oxide, thiab silica. Tom qab sib tov, cov ntaub ntawv yog rhuab mus txog 1500 ℃ kom cov cement ua tiav nws cov khoom siv tshuaj lom neeg kawg.
Dab tsi yog Admixtures?
Admixtures rau qhob yuav ua tau ob hom, organic thiab inorganic tebchaw. Multifunctional admixtures yog cov uas hloov ntau tshaj ib lub cev lossis tshuaj lom neeg ntawm cov pob zeb sib xyaw. Muaj ntau yam kev sib xyaw ua ke muaj rau kev hloov kho sib txawv ntawm cov pob zeb. Admixtures tuaj yeem faib ua:
Dej Txo Cov Khoom Siv
Cov no yog cov tebchaw uas ua haujlwm zoo li cov yas yas, uas txo cov dej ntawm cov pob zeb sib xyaw kom ntau li 5% yam tsis hloov nws qhov sib xws. Cov dej txo cov khoom sib xyaw feem ntau yog polycyclic derivatives lossis phosphates. Thaum ntxiv, cov admixtures no ua rau kom lub zog compressive ntawm ib qho kev sib xyaw ua ke los ntawm kev ua kom nws cov yas ntau dua. Hom kev sib xyaw no feem ntau siv nrog hauv pem teb thiab txoj kev pob zeb.
High Range Dej Reducers
Cov no yog cov superplasticizers, feem ntau yog cov khoom siv polymer ua ke uas txo cov ntsiab lus dej ntau li 40%. Nrog rau cov admixtures, qhov porosity ntawm qhov sib tov yog txo, yog li txhim kho nws lub zog thiab durability. Cov admixtures no feem ntau yog siv rau tus kheej-compacting thiab sprayed pob zeb.
Accelerating Admixtures
Qhob feem ntau yuav siv sij hawm los hloov los ntawm yas mus rau lub xeev hardened. Polyethylene glycols, chlorides, nitrates, thiab hlau fluorides feem ntau yog siv los ua cov khoom siv no. Cov tshuaj no tuaj yeem muab ntxiv rau hauv ib qho kev sib xyaw ua ke kom luv lub sijhawm nws siv rau kev sib raug zoo thiab teeb tsa.
Cua-Entraining Admixtures
Cov admixtures no yog siv los ua cua-entrained pob zeb sib tov. Lawv pab kom muaj kev sib koom ua ke ntawm huab cua npuas rau hauv cov pob zeb sib xyaw ua ke kom txhim kho cov khoom xws li durability thiab lub zog los ntawm kev hloov cov khov-thaw ntawm cov cement.
Retarding Admixtures
Tsis zoo li accelerating admixtures uas shorten bonding thiab teeb, retarding admixtures nce lub sij hawm ua vaj tse yuav siv sij hawm. Xws li cov khoom sib xyaw tsis hloov cov dej-cement piv tab sis siv cov hlau oxides thiab cov suab thaj kom lub cev cuam tshuam cov txheej txheem khi.
Qhob additives thiab admixtures tam sim no yog cov khoom ua tau zoo tshaj plaws ntawm cov khoom siv tshuaj. Ntawm Jufu Chemtech, peb ua haujlwm nrog cov tuam txhab hauv zos thiab ntau lub teb chaws los xyuas kom meej tias peb cov neeg tau txais cov khoom zoo tshaj plaws rau lawv cov kev tsim kho. Mus saib peb lub vev xaib kom pom thiab yuav cov khoom siv tau zoo tshaj plaws thiab ntseeg siab tshaj plaws thiab cov khoom sib xyaw ua ke thoob ntiaj teb.(https://www.jufuchemtech.com/)
Post lub sij hawm: Mar-07-2022
