Cov khoom siv cementing yog dab tsi? Thiab hom twg?

Cov khoom siv cementing yog ib yam khoom siv los khi lossis nplaum lwm cov ntaub ntawv ua ke los ua ib qho khoom loj. Hauv kev tsim kho, nws yog siv los khi lub tsev thaiv thiab tsim cov qauv. Muaj ntau ntau hom cementing khoom siv rau kev tsim kho, suav nrog:

1. Portland Cement: Qhov no yog hom cement feem ntau siv hauv kev tsim kho. Nws yog tsim los ntawm cua sov limestone thiab av nplaum nyob rau hauv ib lub kiln los tsim clinker, uas yog tom qab ntawd hauv av rau hauv ib lub hmoov zoo. Portland cement yog siv nyob rau hauv ntau yam kev siv, nrog rau cov hauv paus tsev, phab ntsa, thiab pem teb.
2. Hydraulic Cement: Hom cement no hardens thaum nws los rau hauv dej. Nws yog siv nyob rau hauv cov ntawv thov uas yuav tsum tau muaj zog, ceev-ceev cement, xws li hauv kev tsim cov dams, txuas hniav, thiab tunnels.
3. Txiv qaub: Txiv qaub yog ib yam khoom siv cementing uas tau siv ntau txhiab xyoo. Nws yog tsim los ntawm cua sov limestone mus rau qhov kub siab los tsim cov kua qaub sai, uas yog tom qab ntawd tov nrog dej los tsim cov txiv qaub hydrated. Txiv qaub yog siv nyob rau hauv daim ntaub ntawv uas yuav tsum tau ib tug breathable, saj zawg zog cement, xws li nyob rau hauv kev tsim kho ntawm historic vaj tse thiab cov qauv.
4. Gypsum: Gypsum yog ib hom cementing khoom uas yog tsim los ntawm cua sov gypsum pob zeb mus rau qhov kub thiab txias thiab ces sib tsoo rau hauv cov hmoov zoo. Nws yog siv rau hauv cov ntawv thov uas yuav tsum tau muaj lub teeb yuag, hluav taws kub-resistant cement, xws li hauv kev tsim cov phab ntsa sab hauv thiab qab nthab.
5. Pozzolanic Cement: Hom cement no yog tsim los ntawm kev sib xyaw cov ntaub ntawv pozzolanic (xws li volcanic tshauv) nrog txiv qaub lossis Portland cement. Pozzolanic cement yog siv rau hauv cov ntawv thov uas cov cement nrog txhim khu kev ruaj ntseg thiab tiv thaiv tshuaj tua kab mob yog xav tau.