Post Date:15,Kubvumbi,2024
Ongororo yebasa rekongiri admixtures:
Concrete admixture chinhu chemakemikari chinowedzerwa panguva yekugadzirira kongiri. Inogona kushandura zvimiro zvemuviri uye kushanda kwekongiri, nekudaro optimize kuita kwekongiri. Kutanga, kongiri admixtures inoita basa rakakosha mukuvandudza kongiri zvivakwa. Kune rumwe rutivi, inovandudza simba uye kusimba kwekrete. Nekuwedzera huwandu hwakakodzera hwemisanganiswa senge inosimbisa maajenti uye inodzoreredza, iyo inomanikidza simba, kusimba simba uye kutonhora-kunyunguduka kuramba kwekongiri kunogona kuwedzera, uye iyo yese mechanic zvimiro zvekongiri inogona kuvandudzwa. Kune rumwe rutivi, inogonawo kuvandudza kemikari inopikisa kongiri. Semuyenzaniso, kuwedzera admixtures akadai sekudzivirira mvura uye zvinochengetedza zvinogona kuderedza kupinda kwemvura uye makemikari mukongiri uye kunatsiridza kusimba uye sevhisi hupenyu hwekongiri. Chechipiri, kongiri admixtures inoita basa rakakosha mukugadzirisa kushanda kwekongiri. Kushanda kwekushanda kunoreva kupurasitiki, fluidity uye kudurura kwekongiri panguva yekuvaka. Nekuwedzera admixtures akadai semvura inoderedza vamiririri, tackifiers uye plasticizers, fluidity uye kunamatira kongiri kunogona kuchinjwa, zvichiita kuti ive nani plastiki uye fluidity, zvichiita kuti mabasa ekuvaka uye kudurura zvive nyore. Uye zvakare, kuwedzera ma admixtures akadai semhepo foam agents uye stabilizers anogona zvakare kudzora bubble zvemukati uye kugadzikana kwekongiri kuti ienderane kune akasiyana einjiniya zvinodiwa.
Tsvagiridzo pane chaiyo yekushandisa matanho ekongiri admixtures:
(1) Kushandiswa kwemvura inodzikisa agent
Kubva pakuona kwekuita kwemugadziri wekudzikisa mvura, mhedzisiro yayo yekudzikisa mvura inova pachena, uye ine hupfumi hwehunyanzvi. Kana iwe uchida kuve nechokwadi chekudonha kwese kwekongiri zvinhu, kana uchikwanisa kusanganisa zvakanakira zvemvura zvinoderedza vamiririri, unogona kunyatso kudzikisa huwandu hwekongiri yemvura inoshandiswa muyuniti uye kuderedza iyo yakazara mvura-simende ratio, nekudaro uchizadzisa chinangwa chekusimudzira. yekuvandudza kusimba kwechimiro chekrete. Panguva imwecheteyo, kushandiswa kunobudirira kweiyi nzira kunogonawo kuvandudza zviri nani kuwanda uye kusimba kwekongiri zvinhu. Kana iyo yakazara mvura yekushandisa yekongiri zvinhu inoramba isina kuchinjika, yakasanganiswa neakanakira emvura inoderedza vamiririri, iyo fluidity yezvinhu zvekongiri inogona kuvandudzwa. Nepo kuchengetedza kugadzikana kwesimba rekongiri, kushandiswa kwemvura-kuderedza admixtures kunogonawo kuzadzisa chinangwa chekusimudzira chekudzikisa simende kushandiswa. Deredza mari yekuvaka isingakoshi uye kuderedza mari yekushandisa. Padanho razvino, nzira dzakasiyana-siyana dzekudzikisa mvura dzakaonekwa pamusika. Mhando dzakasiyana dzevamiririri vanodzikisa mvura vane misiyano iri pachena zvakanyanya maererano nehukuru hwemashandisirwo uye mashandisiro ekushandisa. Vashandi vanofanirwa kuzvishandisa zvinobudirira zvichienderana nemamiriro chaiwo ari panzvimbo.
(2) Kushandiswa kwekutanga kusimbisa mumiriri
Early simba mumiriri anonyanya kukodzera kuvaka kwechando kana mapurojekiti ekugadzirisa emergency. Kana tembiricha yenzvimbo yekuvaka yakakwira, kana tembiricha yakadzikira pane -5 ℃, musanganiswa uyu haugone kushandiswa. Kune yakakura-vhoriyamu kongiri zvinhu, huwandu hukuru hwekupisa kwe hydration huchaburitswa panguva yekushandiswa, uye maajenti ekutanga esimba haana kukodzera kushandiswa. Padanho razvino, anonyanya kushandiswa ekutanga simba maajenti anonyanya sulfate ekutanga simba maajenti uye chloride ekutanga simba vamiririri. Pakati pavo, iyo inonyanya kukosha inobatsira ndeye chlorine munyu yekutanga simba mumiriri, iyo ine sodium chloride, calcium chloride uye zvimwe zvinhu. Munguva yekushandiswa kweiyi yekutanga simba agent, calcium chloride inogona kuita zvemakemikari pamwe nezvikamu zvakabatana musimende, ichiwedzera kuwedzera chikamu chakasimba chechikamu mudombo resimende, nokudaro kukurudzira kuumbwa kwechimiro chematombo esimende. Mushure mekupedza izvo zviri pamusoro pebasa remukati, zvinogona zvakare kuderedza dambudziko remvura yakawandisa yemahara mukongiri mubasa rechinyakare, kuderedza kukanganiswa kweporosity, uye kunyatsozadzisa zvinangwa zvekusimudzira zvesimba repamusoro uye kukwirira kwepamusoro. Izvo zvinofanirwa kucherechedzwa kuti chlorine munyu yekutanga simba mumiriri inogona kunge iine imwe corrosive mhedzisiro pane simbi chimiro panguva yekushandiswa. Tichifunga nezvedambudziko iri, rudzi urwu rwemusanganiswa haruna kukodzera kune prestressed kongiri yekuvaka mabasa. Mukutsvagisa nezve sulfate yekutanga simba maajenti, sodium sulfate yekutanga simba mumiriri ndiyo inoshandiswa zvakanyanya yekutanga simba mumiriri. Tichitarisa kubva kune maitiro ayo, ine simba rekudzivirira mvura. Uye kana yakasanganiswa muzvinhu zvekongiri, inogona zvakare kupinda munhevedzano yemakemikari ekuita nezvimwe zvikamu musimende, pakupedzisira ichigadzira inodiwa hydrated calcium sulfoaluminate. Mushure mekunge chinhu ichi chagadzirwa, chinogona kuwedzera kukurumidza kuomesa simenti. Chloride munyu yekutanga-simba maajenti uye sulfate yekutanga-simba maajenti inorganic munyu wekutanga-simba maajenti. Kana basa rinoenderana richida kuitwa pakupisa kwakanyanya, iyi yekutanga-simba mumiriri haigone kushandiswa. Muchiitiko chaicho chekushandisa, vashandi vanofanirwa kusanganisa hunhu hweakasiyana ekutanga simba maajenti uye mamiriro chaiwo pane saiti kuti vasarudze akakodzera ekutanga simba mumiriri.
Nguva yekutumira: Kubvumbi-17-2024
