Dab tsi yog hauv cement?

Dab tsi yog hauv cement?
Dab tsi yog hauv cement?

Video: Dab tsi yog hauv cement?

Video: Dab tsi yog hauv cement?
Video: New Laj Tsawb Hlub Tsis Muaj Tso Yuav Nciam Ntawm Koj Mus 2024, Kaum ib hlis
Anonim

Cement yog ib qho ntawm cov khoom siv hauv tsev tseem ceeb hauv cheeb tsam no txij thaum ub los. Qhov sib xyaw ntawm cov cement muaj xws li ntau yam khoom siv tsis zoo, uas, thaum sib cuam tshuam nrog dej, tsim ib qho kev daws teeb meem. Vim muaj cov txheej txheem ntawm lub cev zoo, cov tshuaj no hardens thaum qhuav.

cement muaj pes tsawg leeg
cement muaj pes tsawg leeg

Cement yog tsim los ntawm ntau txoj hauv kev, tab sis feem ntau yog siv ob lub ntsiab: qhuav thiab ntub. Nws kev tsim khoom yog ib qho kim kim thiab siv zog-intensive txheej txheem. Lub thiaj li hu ua sludge nyob rau hauv nws thawj daim ntawv yog loaded rau hauv ib tug tshwj xeeb rauv, tom qab uas lub clinker yog sintered. Thaum lub sij hawm tsim cov txheej txheem, lub kiln tig tsis tu ncua, kom lub clinker sib npaug sib xyaw rau hauv nws. Qhov no tso cai rau koj ua kom sib tov ntau homogeneous thiab sib npaug.

Cov cement muaj hlau oxide. Nws muaj kev cuam tshuam loj heev rau tag nrho qhov zoo ntawm cov cement sib tov. Cement ntawm qhov zoo tshaj plaws - nrog cov ntsiab lus hlau oxide ntawm txog 10%. Nrog rau qhov piv txwv no, oxides muaj txiaj ntsig zoo tshaj plaws rau kev tsim cov zaub mov. Tab sis txhua yam xav tau kev ntsuas, yog li ntawd, nrog kev nce ntxiv ntawm cov hlau oxide nyob rau hauv cov cement, nws qhov zoo tag nrho kuj txo.

chemical muaj pes tsawg leeg ntawm cement
chemical muaj pes tsawg leeg ntawm cement

Ntau tshaj qhov tso caiCov qauv yog 25% hlau oxide. Raws li koj paub, cement kuj yog siv los tsim lossis tsim cov khoom siv hluav taws xob thiab cov qauv. Nyob rau hauv cov ntaub ntawv no, lub xub ntiag ntawm hlau oxides yog tsis tsim nyog. Tsis tas li ntawd, tus nqi ntawm cov hlau ncaj qha cuam tshuam rau cov xim ntawm cov cement: qhov sib dua nws yog, qhov feem pua ntawm cov additives qis dua. Grey cement, ntawm qhov tsis sib xws, muaj cov ntsiab lus siab tshaj plaws ntawm cov hlau oxides hauv nws cov muaj pes tsawg leeg.

Yog tias koj txuas ntxiv tshuaj xyuas cov tshuaj lom neeg ntawm cov cement, koj tuaj yeem pom cov txhuas oxide hauv nws. Qhov loj tshaj plaws ntawm aluminium oxide muaj nyob rau hauv cov khoom ntawm cov cement, muab nws cov khoom ntawm tshav kub tsis kam. Hauv cov cement zoo, cov ntsiab lus ntawm cov tshuaj no yog kwv yees li 60%.

Ntxiv rau cov oxides saum toj no, cov cement muaj oxides ntawm calcium, silicon, thiab magnesium. Cov tuam txhab tsim cement tau sib ntaus sib tua kom ntseeg tau tias lawv cov khoom tsis muaj oxides ntawm chromium, uas yog cov hlau nquag thiab nkag mus rau hauv cov tshuaj tsis haum tshuaj.

cement additives
cement additives

Nyob ntawm qhov muaj pes tsawg leeg ntawm cov cement, nws tau muab faib ua hom sib txawv ntawm lub cev: gypsum-slag, ceev-ceev, tshauv, aluminous, gypsum-aluminous thiab waterproof.

Ntau yam khoom siv ntxhia ntxiv tau ntxiv rau hauv cov cement kom txhim kho nws qhov zoo. Lawv yog cov khoom tsim los yog ntuj. Cov khoom siv ntxiv rau cov cement muab nws ntau yam khoom: txhim kho nws cov haujlwm ua haujlwm thiab ua kom muaj dej ntau, txhim kho kev nthuav dav, txo qis qis, hloov plasticity thiab ntom. Tsis tas li ntawd, qhov sib ntxiv ntawm cov tshuaj no pab txhawb raudurability thiab lub zog ntawm cement mortars.

Cov khoom ntxiv hauv cov cement tsis yog siv los txhim kho qee qhov ntawm nws tus kheej lub cev, tab sis kuj hloov pauv, piv txwv li, xim. Rau cov hom phiaj no, koj tuaj yeem siv cov xim tsis tu ncua.

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