Chii chinonzi simende? Uye marudzi api?

Cementing material (cementing material) chinhu chinoshandiswa kusunga kana kunamira zvimwe zvinhu pamwechete kuti zviumbe hurema hwakasimba. Mukuvaka, inoshandiswa kusunga zvivharo zvekuvaka uye kugadzira zvivakwa. Kune akati wandei emhando dzesimende zvinhu zviripo zvekushandisa mukuvaka, kusanganisira:

1. Portland Cement: Iyi ndiyo inonyanya kushandiswa sement mukuvaka. Inogadzirwa nekudziisa limestone nevhu muchoto kuti igadzire clinker, iyo inobva yakuyiwa kuita hupfu hwakatsetseka. Portland simende inoshandiswa mumhando dzakasiyana siyana dzekushandisa, kusanganisira nheyo dzekuvaka, madziro, uye pasi.
2. Hydraulic Cement: Iyi simende inoomesa kana yasangana nemvura. Inoshandiswa muzvishandiso panodiwa simende yakasimba, inokurumidza kugadzika, senge mukuvaka madhamu, mabhiriji, uye tunnel.
3. Lime: Lime imhando yesimbi yave ichishandiswa kwezviuru zvemakore. Inogadzirwa nekupisa limestone kune tembiricha yakakwira kuti ibudise quicklime, iyo inobva yasanganiswa nemvura kugadzira hydrated lime. Lime inoshandiswa mumashandisirwo panodiwa simende inofema, inochinjika, senge mukuvakwa kwezvivakwa zvekare uye zvimiro.
4. Gypsum: Gypsum imhando yesimbi inogadzirwa nekudziisa gypsum rock kusvika pakupisa kwepamusoro uye woikuya kuita hupfu hwakatsetseka. Inoshandiswa mumashandisirwo panodiwa simende isingaremi, isingadziviriri moto, senge mukuvaka madziro emukati uye sirin'i.
5. Pozzolanic Cement: Iyi mhando yesimende inogadzirwa nekusanganisa pozzolanic zvinhu (senge volcanic ash) neraimu kana Portland simende. Pozzolanic simende inoshandiswa mumashandisirwo apo simende ine kuvandudzwa kusimba uye kuramba kurwiswa kwemakemikari inodiwa.