1. Thaum cov cement cov ntsiab lus zoo ib yam thiab cov slump zoo ib yam li cov pob zeb dawb paug, cov dej haus tuaj yeem txo tau los ntawm 10-15%, lub zog 28-hnub tuaj yeem nce los ntawm 10-20%, thiab ib xyoos. lub zog tuaj yeem nce li ntawm 10%.
2. Kev txuag Cement Thaum lub zog thiab slump ntawm cov pob zeb zoo sib xws, kwv yees li 10% ntawm cov cement tuaj yeem txuag tau, thiab 30-40 tons ntawm cov cement tuaj yeem txuag tau los ntawm kev siv 1 tuj dej-txo tus neeg sawv cev.
3. Txhim kho kev ua haujlwm ntawm cov pob zeb thaum cov cement cov ntsiab lus thiab cov dej siv ntawm cov pob zeb tseem tsis hloov, qhov poob ntawm cov pob zeb uas tsis tshua muaj zog tuaj yeem nce li ob zaug (los ntawm 3-5 cm mus rau 8-18 cm), thiab lub zog thaum ntxov yog yeej nyob ze rau ntawm cov pob zeb tsis sib xyaw.
4. Tom qab ntxiv 0.25% lignocelcium superplasticizer nrog cov nyhuv retarding, thaum cov pob zeb poob qis yog qhov zoo ib yam, lub sijhawm pib ntawm cov cement zoo tib yam ncua sijhawm rau 1-2 teev, slag cement yog 2-4 teev, lub sijhawm teem sijhawm kawg. ntawm cov cement zoo tib yam yog 2 teev, thiab cov cement slag yog 2-3 teev.Yog tias qhov slump nce ntxiv yam tsis tau txo cov dej haus, los yog tib lub slump yog khaws cia kom txuag tau cov cement noj, lub sij hawm ncua sij hawm ntau dua li qhov txo cov dej.
5. Nws tuaj yeem txo qhov tshwm sim ntawm exothermic ncov ntawm cov dej thaum ntxov ntawm cov cement, uas yog li 3 teev rau cov cement zoo tib yam, txog 8 teev rau slag cement, thiab ntau tshaj 11 teev rau cov cement cement.Qhov kub siab tshaj plaws ntawm lub ncov exothermic yog qis me ntsis rau cov cement zoo tib yam, thiab tsawg dua 3 ℃ rau slag cement thiab dam cement.
6. Cov ntsiab lus cua ntawm cov pob zeb yog nce.Cov ntsiab lus cua ntawm cov pob zeb dawb yog li 1%, thiab cov ntsiab lus cua ntawm cov pob zeb sib xyaw nrog 0.25% ntoo calcium yog li 2.3%.
7. Kev txo qis los ntshav Raws li qhov kev poob qis ntawm cov pob zeb yog qhov pib zoo ib yam, cov ntshav los ntawmcalcium lignosulphonatetuaj yeem txo los ntawm ntau dua 30% piv nrog cov pob zeb tsis muajcalcium lignosulphonate.Nyob rau hauv cov xwm txheej uas qhov sib piv ntawm cov dej-cement tseem tsis hloov pauv thiab cov slump yog nce, cov ntshav los kuj txo qis vim yog cov khoom siv hydrophilic.calcium lignosulphonatethiab qhia txog huab cua.
8. Piv nrog rau cov uas tsis muaj dej-txo tus neeg sawv cev, qhov qhuav shrinkage kev ua tau zoo yog nyob ze los yog qis me ntsis ntawm thawj theem (1-7) hnub, thiab nce me ntsis tom qab theem (tshwj tsis yog cov txuag cement), tab sis cov nce tus nqi tsis ntau tshaj 0.01% (0.01mm / m).
9. Txhim kho qhov compactness thiab impermeability ntawm pob zeb.Los ntawm B = 6 rau B = 12-30.
10. Nws tsis muaj cov tshuaj chlorine ntsev thiab tsis muaj kev phom sij rau kev txhim kho.
Post lub sij hawm: May-16-2023