Post Date:26, Aug, 2024
1. Mineral composition
Zvinhu zvikuru zviri mukati meC3A neC4AF. Kana zviri mukati mezvikamu izvi zvakaderera, kuwirirana kwe simenti uye mvura inoderedza kunenge kwakanyatsonaka, pakati payo C3A ine simba rakasimba pane kugadzirisa. Izvi zvinonyanya nekuti iyo inoderedza mvura inotanga adsorbs C3A uye C4AF. Mukuwedzera, iyo hydration rate yeC3A yakasimba kudarika iyo yeC4AF, uye inowedzera nekuwedzera kwekunatsa simende. Kana zvimwe zvikamu zveC3A zviri mune simenti, zvinotungamirira zvakananga kune zvishoma zvishoma zvemvura yakanyungudutswa mu sulfate, zvichiita kuti kuderera kwehuwandu hwe sulfate ions inogadzirwa.
2. Kunaka
Kana iyo simenti yakanyatsonaka, nzvimbo yayo chaiyo ichave yakakura, uye flocculation effect ichava pachena. Kuti udzivise iyi flocculation chimiro, imwe huwandu hwemvura inodzikisira inoda kuwedzerwa kwairi. Kuti uwane yakakwana yekuyerera mhedzisiro, zvinodikanwa kuwedzera kushandiswa kwemvura inoderedza kusvika kumwero wakati. Mumamiriro ezvinhu akajairwa, kana simende yakanyatsonaka, nzvimbo chaiyo yesamende yakakwira zvakanyanya, uye pesvedzero yemvura inodzikisira pahuwandu hwesimende ichawedzera, zvichiita kuti zviome kuve nechokwadi chekuyerera kwesamende paste. Nokudaro, muhutano chaihwo hwekugadzirisa kongiri nehuwandu hwemvura-samende, chiyero chemvura-kune-nzvimbo inofanira kunyatsodzorwa kuti ive nechokwadi chokuti simenti uye zvinoderedza mvura zvine simba rakasimba.
3. Kudhirowa kwezvikamu zvesimende
Kupesvedzera kwesement particle grading pakugadzirisa simende kunonyanya kuratidzwa mumusiyano wezvakagadzirwa poda yakatsetseka muzvikamu zvesimende, kunyanya zviri mukati mezvikamu zvisingasviki 3 microns, iyo ine simba rakananga pakushambadza kwemvura inoderedza. Zviri mukati mezvimedu zvisingasviki 3 microns musimende zvinosiyana zvakanyanya nevagadziri vesimende vakasiyana, uye inowanzogoverwa pakati pe8-18%. Mushure mekushandisa yakavhurika-yekuyerera mill system, iyo chaiyo nzvimbo yesamende yakagadziridzwa zvakanyanya, iyo ine yakanyanya kukonzeresa kuchinjika kwesimende uye zvidzikisi zvemvura.
4. Kutenderera kwezvikamu zvesimende
Pane nzira dzakawanda dzekuvandudza kutenderera kwe simenti. Kare, simende yaiwanzokuyiwa kuti isakuya mipendero nemakona. Zvisinei, mune chaiyo yekushanda kwekushanda, nhamba huru yehupfu hwakatsetseka hunoita kuti huonekwe, iyo ine simba rakananga pakushanda kwesamende. Kuti ugadzirise zvinobudirira dambudziko iri, tekinoroji yesimbi yekukuya bhora inogona kushandiswa zvakananga, iyo inogona kuvandudza zvakanyanya spheroidization yemasimende masimende, kuderedza kurasikirwa kwekushanda, uye kupfupisa simende nguva yekukuya. Mushure mekunge kutenderera kwemasimende zvimedu zvavandudzwa, kunyangwe mhedzisiro paiyo yakazara dosi yemvura inoderedza haina kukura zvakanyanya, inogona kuvandudza kuyerera kwekutanga kwesamende paste kusvika pamwero mukuru. Ichi chiitiko chichave chakanyanya kujeka kana huwandu hwemvura inoderedza kushandiswa idiki. Uye zvakare, mushure mekuvandudza kutenderera kwemasimende zvimedu, iyo fluidity yesamende paste inogona zvakare kuvandudzwa kune imwe nhanho.
5. Zvinhu zvakasanganiswa
Mukushandiswa kwezvino simenti munyika yangu, zvimwe zvinhu zvinowanzosanganiswa pamwechete. Izvi zvakasanganiswa zvinhu zvinowanzobatanidza blast furnace slag, fly ash, coal gangue, zeolite powder, limestone, etc. Mushure mekuita kwakawanda, zvakasimbiswa kuti kana mvura inoderedza uye inobhururuka madota inoshandiswa sezvinhu zvakasanganiswa, zvishoma zvakanaka simenti inogadziriswa inogona. kuwanikwa. Kana madota egomo rinoputika uye marasha gangue zvikashandiswa semidziyo yakavhenganiswa, zvakaoma kuwana zvakanaka kusanganisa kuchinjika. Kuti uwane mhinduro iri nani yekudzikisa mvura, mvura yakawanda inoderedza inodiwa. Kana madota enhunzi kana zeolite akaverengerwa mune yakasanganiswa zvinhu, kurasikirwa pakubatidza kunowanzoenderana nekunaka kwedota regomo rinoputika. Kana kurasikirwa kwakaderera pakubatidza, ndiko kuwedzera kwemvura kunodiwa, uye kuwedzera kwenzvimbo yemadota egomo rinoputika. Mushure mekuita kwakawanda, zvakaratidzwa kuti kuchinjika kwezvinhu zvakasanganiswa kune simende uye mvura yekudzikisa mumiriri zvinonyanya kuratidzwa mune zvinotevera zvinhu: ① Kana slag ikashandiswa kutsiva simende paste, kuyerera kwepaste kunenge kwakasimba se kutsiva kuwedzera kunowedzera. ② Kana madota enhunzi akashandiswa zvakananga kutsiva simende paste, kuyerera kwayo kwekutanga kunogona kudzikiswa zvakanyanya mushure mekutsiviwa kwezvinhu kwapfuura 30%. ③ Kana zeolite yakashandiswa zvakananga kutsiva simende, zviri nyore kukonzera kusakwana kwekutanga fluidity yenamira. Mumamiriro ezvinhu akajairika, nekuwedzera kweiyo slag kutsiva chiyero, kuyerera kwekuchengetedza simenti paste kuchawedzerwa. Kana madota anobhururuka achiwedzera, kuyerera kwekurasikirwa kwepaste kuchawedzera kune imwe nhanho. Kana iyo zeolite yekutsiva chiyero ichipfuura 15%, kuyerera kurasikirwa kwepaste kuchave kuri pachena.
6. Mhedzisiro yemhando ye admixture pane fluidity ye simenti paste
Nekuwedzera chimwe chikamu chemisanganiswa kune kongiri, iyo hydrophobic mapoka ezvisanganiswa achave anotungamira adsorbed pamusoro pemasimende masimende, uye mapoka e hydrophilic anonongedzera kune mhinduro, nekudaro zvinobudirira kugadzira adsorption firimu. Nekuda kweiyo inotungamira adsorption maitiro eiyo admixture, pamusoro pemasimende zvimedu zvichave nemachaji echiratidzo chimwe chete. Pasi pemhedzisiro yemachaji akafanana anodzosera mumwe nemumwe, simende ichaumba kupararira kwechimiro chakanyorova padanho rekutanga rekuwedzera kwemvura, kuitira kuti iyo flocculent chimiro chiburitswe kubva mumvura, nekudaro ichivandudza fluidity yemuviri wemvura kune imwe. extent. Kuenzaniswa nezvimwe zvinosanganiswa, chinhu chikuru chepolyhydroxy acid admixtures ndechekuti vanogona kuumba mapoka ane akasiyana mhedzisiro pacheni huru. Kazhinji, hydroxy acid admixtures ane simba guru pane fluidity ye simenti. Mukugadzirira kwekongiri yakasimba-yakasimba, kuwedzera chimwe chikamu chepolyhydroxy acid admixtures inogona kuita zvirinani kugadzirira. Nekudaro, mukuita kwekushandisa polyhydroxy acid admixtures, ine zvakati wandei zvinodiwa pakuita kwesimende mbishi zvinhu. Mukushandiswa chaiko, musanganiswa unowanzoita viscosity uye unonamatira pasi. Mukushandiswa kwekupedzisira kwechivako, zvakare inotarirwa kune mvura seepage uye stratification. Mushure mekugadzirisa, inowanzoita roughness, mitsetse yejecha, uye maburi emhepo. Izvi zvakanangana nekusapindirana kwepolyhydroxy acid admixtures ne simenti uye mineral admixtures. Polyhydroxy acid admixtures ndiwo anosanganisa ane akanyanya kuchinjika kune simende pakati pemhando dzese dzemisanganiswa.
Nguva yekutumira: Aug-26-2024
