Cement yog cov khoom tseem ceeb ntawm cov khoom sib tov qhuav rau kev tsim kho, uas yog siv rau hauv kev tsim vaj tsev, vaj tse, kev tsim kho, kev tsim kho vaj tse, ua vaj tse pob zeb los yog plastering thiab ua tiav. Hauv kev tsim kho, qhov ntom ntawm cov cement (raws li qhov piv ntawm qhov loj rau ntim) muab faib ua ntau thiab muaj tseeb. Ob tus yam ntxwv sib txawv ntawm qhov ntau qhov ntom ntom yog ntsuas thaum cov khoom nyob hauv lub xeev xoob. Nws yog 1100 - 1600 kg / cu. meter (1600 kg/cu.m. rau compacted mob).
Qhov ntom ntom ntawm cov cement yog ntsuas ntawm cov cuab yeej tshwj xeeb, suav nrog lub funnel thiab ntsuas lub tog raj kheej. Ib qho cement sib tov ntawm ib qho loj (2 kilograms) yog poured rau hauv ib tug funnel, uas ntxiab loj inclusions. Tom qab ntawd, nws nkag mus rau hauv lub tog raj kheej, txiav, thiab ces hnyav ua ke nrog lub tog raj kheej. Qhov hnyav ntawm lub tog raj kheej yog rho tawm los ntawm tag nrho qhov hnyav tau txais. Tom ntej no, qhov loj yog muab faib los ntawm lub ntim thiab qhov xav tau tus nqi yog tau. Tus nqi ntau qhov ceev yog siv thaum thauj khoom rau hauv lub pob zeb sib tov raukev npaj ua vaj tse.
Qhov tseeb qhov ntom ntawm cov cement txawv ntawm cov cement ntau nyob rau hauv uas tag nrho cov khoom cua tsis suav nrog cov cement. Qhov no ua rau kom muaj qhov ntom ntom ntawm 3000 - 3200 kg / cu. meter. Hauv kev tsim kho, tus nqi nruab nrab ntawm kwv yees li 1300 kg / cubic meter yog siv rau kev suav. meter. Nws yog assumed tias cov cement, qhov ceev ntawm qhov sib txawv nyob rau hauv xws li ib tug ntau yam, qhov zoo dua qhov zoo nyob rau hauv lub tsev sib tov, qhov ze rau qhov ceev ntawm qhov nruab nrab.
Qhov ntom ntawm cov cement nyob ntawm qhov kev sib tsoo ntawm cov khoom, qhov saum npoo ntawm cov nplej hauv cov khoom, thiab tseem yuav ua li cas cov sib tov tau qhuav hauv silos. Tsis tas li ntawm cov yam tseem ceeb tuaj yeem sau cia cov xwm txheej - kub, av noo thiab lwm yam ntxwv. Qhov ntom ntawm cov khoom xws li cov cement ntxiv txiav txim siab tsis xws li lub zog thiab kev tiv thaiv rau dej nkag (hydrophobicity).
Qhov ntom ntawm M400 cement nyob ntawm ntau yam ntawm cov khoom siv no. Piv txwv li, M400-D0 tsis muaj additives (D=0), yog li lub hom yog siv nyob rau hauv underground thiab underwater ua hauj lwm, muaj dej tsis kam, ceev thiab lub zog. Cement M400-D20 muaj li ntawm 20% additives uas txo nws cov ntom. Yog li ntawd, cov cement no yog siv rau hauv pem teb slabs, txoj kev ua haujlwm, qhov muag tsis pom kev tsim kho, txoj kev thiab paving slabs. Tab sis qib M400-D20-B zoo ib yam li M400-D0 hais txog nws lub zog, tab sis nws hardens sai heev, uas tso cai rau nws siv rau zus tau tej cov pob zeb ua vaj tse.
Tus lej 400 hauv qhov cimM400 txhais tau tias muaj pes tsawg kilograms ntawm cov cement tuaj yeem tiv taus nyob rau hauv lub xeev hardened ib square centimeter. Hauv peb qhov xwm txheej, qhov no yog 400 kg. Tus lej siab dua, qhov siab dua qhov load nws tuaj yeem nqa tau. Cement yog muab rau cov neeg siv khoom hauv hnab lossis hauv ntau. Cov khoom siv hauv tsev yog muab rau hauv lub hnab rau kev ua tiav, thiab hauv cov khoom loj - rau cov pob zeb ua vaj tse rau kev siv. Txawm li cas los xij, muaj cov hnab ntim loj heev uas tuaj yeem tuav txog li ib tuj. Lawv kuj tau siv los ua haujlwm nrog cov khoom siv hauv tsev loj.
