Cov khoom siv txhais tau tias txhua yam khoom ntiag tug los hloov ua vaj tse tiag Cov khoom siv txhais tau tias txhua yam khoom siv pov tseg ntawm lub tsev lossis kev puas tsuaj ntawm cov qauv, txoj kev thiab txuas hniav nrog rau pob zeb, pob zeb, asph alt, plasterboard, ntoo thiab lwm yam khoom siv.
Cov khoom siv thiab piv txwv yog dab tsi?
Cov khoom siv hauv tsev yog cov khoom siv uas tuaj yeem siv rau kev tsim kho. Nws feem ntau suav nrog ntoo, pob zeb, steel, cement, aggregates, cib, av nplaum, hlau, thiab ntau ntxiv. Nyob rau hauv ancient sij hawm, tib neeg tau siv cov cib ntshiab, los yog ntoo, los yog straw.
Qhov twg hauv qab no hu ua khoom siv?
Rau kev tsim kho pej xeem, cov khoom siv hauv tsev tseem ceeb yog cement, xuab zeb, sib sau ua ke, thiab hlau. Cov cement yog siv los ua pob zeb thiab plasterwork. Xuab zeb yog siv rau plastering thiab ua vaj tse.
Cov khoom siv siv ntau tshaj plaws yog dab tsi?
Concrete
pob zebyog cov khoom siv siv ntau tshaj plaws hauv ntiaj teb, ua rau nws yog cov khoom pib zoo rau tau paub. Txawm li cas los xij nws kuj tseem muaj kev cuam tshuam rau ib puag ncig, suav nrog cov pa roj carbon ntau txog 5% ntawm cov pa tawm thoob ntiaj teb.
Vim li cas pob zeb pheej yig?
Qhov ntawd yog vim cov pob zeb niaj hnub no yog qhov sib xyaw ntawm cov dej, sib sau ua ke (piv txwv li, pob zeb me), xuab zeb thiab Portland cement. … Tab sis pob zeb muaj cov yam ntxwv uas cement ib leeg tsis ua. Ua ntej, nws yog kev lag luam ntau dua. Pob zeb thiab xuab zeb pheej yig dua li cov cement ib leeg, yog li kev sib xyaw ua ke ua kom cov pob zeb pheej yig dua li cov cement.