Pane zvikonzero zvakawanda zvekudonha kurasikirwa, kunyanya mune zvinotevera zvinhu:
1. Pesvedzero yezvigadzirwa
Kunyangwe simenti inoshandiswa uye iyo yekupomba inofananidzwa uye inogadziriswa inofanira kuwanikwa kuburikidza neiyo adaptability bvunzo.Iyo yakakwana huwandu hweiyo yekupomba agent inofanirwa kutariswa kuburikidza nekuchinjika bvunzo nesamende sementitious zvinhu.Huwandu hwemhepo-inopinza uye inodzoreredza zvikamu muiyo yekupomba ine simba guru pakurasikirwa kwekongiri inodonha.Kana pane zvakawanda zvemhepo-inopinza uye inononoka zvikamu, kudonha kwekongiri kunononoka, kana zvisina kudaro kurasikirwa kuchakurumidza.Kudonha kwekudonha kwekongiri yakagadzirwa nenaphthalene-based superplasticizer inokurumidza, uye kurasikirwa kunononoka kana tembiricha yakadzika yakanaka iri pasi pe +5 °C.
Kana anhydrite inoshandiswa sekugadzirisa kugadzirisa mu simenti, kurasikirwa kwekudonha kwekrete kuchakurumidza, uye chikamu chekutanga chesimba C3A chiri mu simenti chakakwirira.Kana "R" mhando simende inoshandiswa, iyo simende yakanaka kwazvo, uye nguva yekuisa simende inokurumidza, nezvimwewo Zvichaita kuti kudonha kwekongiri kuwedzere, uye kukurumidza kwekongiri yekudonha kurasikirwa kunoenderana nekunaka uye. huwandu hwezvinhu zvakasanganiswa mu simenti.C3A yemukati musimende inofanira kunge iri mukati me4% kusvika 6%.Kana zvinyorwa zvakaderera kupfuura 4%, mhepo-intraining uye retarder zvikamu zvinofanira kuderedzwa, kana zvisina kudaro kongiri haizosimbisi kwenguva yakareba.Kana iyo C3A yemukati yakakwira kupfuura 7%, inofanirwa kuwedzerwa.Air-entraining retarder component, zvikasadaro zvinokonzeresa kukurumidza kurasikirwa kwekongiri kudonha kana nhema yekumisikidza chiitiko.
Madhaka emukati uye madhaka block emukati akaomesesa uye akakwenenzverwa aggregates anoshandiswa mukongiri anodarika mwero, uye zviri mukati mematombo akapwanyika tsono flake zvimedu zvinodarika mwero, izvo zvichaita kuti kudonha kurasikirwa kwekongiri kukurumidze.Kana iyo coarse aggregate ine yakakwira yekunyudza mvura, kunyanya dombo rakapwanyika rinoshandiswa, mushure mekuratidzwa kune tembiricha yepamusoro mumwaka wezhizha wekushisa kwakanyanya, kana yangoiswa mumusanganisi, inotora mvura yakawanda munguva pfupi. yenguva, zvichikonzera kukurumidza kudonha kwekongiri munguva pfupi (30min).
2. Pesvedzero yekukurudzira nzira
Iko kusanganiswa kwekongiri kunokanganisawo kurasikirwa kwekongiri.Iyo modhi yemusanganisi uye kugona kusanganisa kwakabatana.Nokudaro, musanganisi anodiwa kuti agare achigadziriswa uye mashizha anosanganiswa anofanira kuchinjwa nguva dzose.Concrete kusanganisa nguva haifaniri kunge iri pasi pe30s.Kana iri pasi pe30s, kudonha kwekongiri hakuna kugadzikana, zvichikonzera kukurumidza kukurumidza kurasikirwa.
3. Tembiricha zvinokonzerwa
Mhedzisiro yetembiricha pakudonha kwekudonha kwekongiri ndiyo inonyanya kunetseka.Muchirimo chinopisa, kana tembiricha yakakwira kupfuura 25°C kana pamusoro pe30°C, kudonha kwekongiri kunokwidziridzwa neinodarika 50% zvichienzaniswa neiyo pa20°C.Kana tembiricha yakaderera kupfuura +5 ° C, iyo kongiri yekudonha kurasikirwa kuchava kudiki kwazvo kana kusarasika..Nokudaro, panguva yekugadzirwa uye kuvaka kwekongiri yepombi, nyatsoteerera kune simba rekushisa kwemhepo pakudonha kwekrete.
Iyo yakanyanya kupisa tembiricha yezvinhu zvakasvibirira inokonzeresa kuti kongiri iwedzere tembiricha uye nekumhanyisa kurasikirwa kwekudonha.Zvinowanzodikanwa kuti tembiricha yekuburitsa kongiri inofanira kunge iri mukati me5 ~ 35 ℃, kupfuura iyi tembiricha, zvinodikanwa kutora matanho ehunyanzvi anoenderana, sekuwedzera mvura inotonhora, mvura yechando, mvura yepasi kuti itonhorere uye kupisa mvura uye shandisa tembiricha yezvinhu mbishi nezvimwe zvakadaro.
Zvinowanzodikanwa kuti tembiricha yekushanda yesimende uye musanganiswa haifanire kunge yakakwira kupfuura 50 ° C, uye tembiricha yekushandisa yekongiri inopomba yekudziya mvura munguva yechando haifanirwe kunge yakakwira kupfuura 40 ° C.Iko kune nhema coagulation state mumusanganisi, uye zvakaoma kubuda mumushini kana kutakura kuenda kunzvimbo yekuburutsa.
Iyo yakakwirira tembiricha yezvigadzirwa zvesimende zvinoshandiswa, zvakanyanya kuderera kwemvura-kuderedza mhedzisiro yemvura-inoderedza zvikamu mupombi mumiririri pane kongiri yepurasitiki, uye nekukurumidza kudonha kwekongiri kurasikirwa.Iko tembiricha yekongiri yakaenzana nekudonha kwekudonha, uye kurasikirwa kwekudonha kunogona kusvika kusvika 20-30mm apo kongiri inowedzera ne5-10 ℃.
4. Matanho ekusimba
Kudonha kwekudonha kwekongiri kwakabatana negiredhi resimba rekongiri.Kudonha kwekongiri ine giredhi repamusoro kunokurumidza kupfuura iyo yepasi-giredhi kongiri, uye kurasikirwa kwekongiri yematombo yakapwanyika inokurumidza kupfuura iyo yematombo ekongiri.Chikonzero chikuru ndechekuti inoenderana nehuwandu hwesamende payuniti.
5. Concrete state
Concrete statically inorasikirwa nekudonha nekukurumidza kupfuura dynamic.Mumamiriro ezvinhu ane simba, konkrete inoramba ichibvongodzwa, kuitira kuti zvikamu zvinoderedza mvura mumushonga wepombi hazvigoni kunyatsogadzirisa simenti, iyo inodzivisa kufambira mberi kwesamende hydration, kuitira kuti kurasikirwa kwemvura kuduku;mu static state, mvura-inoderedza zvikamu zvinosangana zvizere ne simenti, Iyo simende hydration process inokurumidza, saka kongiri yekudonha kurasikirwa kunowedzera.
6. Michina yekufambisa
Iyo yakareba chinhambwe chekufambisa uye nguva yerori yekongiri yekusanganisa, mvura shoma yemahara yekongiri clinker nekuda kwekuita kwemakemikari, kubuda kwemvura, kutorwa kwemvura kweaggregate uye zvimwe zvikonzero, zvichikonzera kurasikirwa kwekongiri kudonha nekufamba kwenguva.Iyo dhiramu zvakare inokonzeresa kurasikirwa kwedhaka, inovawo chikonzero chakakosha chekudonha kwekongiri kurasikirwa.
7. Dururira kukurumidza uye nguva
Mukuita kudururwa kwekongiri, iyo nguva yakareba yekuti kongiri inosvika pachiso chesilo, kukurumidza kudzikiswa kwemvura yemahara mukongiri clinker nekuda kwekuchinja kwemakemikari, kubuda kwemvura, kunyura kwemvura uye zvimwe zvikonzero, zvichikonzera kurasikirwa. ., kunyanya kana kongiri yakaratidzwa pabhanhire rinotakura, nzvimbo yekubatana pakati pepamusoro nekunze kwekunze yakakura, uye mvura inoputika nokukurumidza, iyo ine simba guru pakuparara kwekrete.Zvinoenderana nechiyero chaicho, kana tembiricha yemhepo yakatenderedza 25 ℃, iyo pa-saiti inodonha kurasikirwa kwekongiri clinker inogona kusvika 4cm mukati mehafu yeawa.
Concrete kudurura nguva yakasiyana, inovawo chikonzero chakakosha chekurasikirwa kwekongiri.Mhedzisiro yacho idiki mangwanani nemanheru, uye kukanganisa kwakanyanya masikati nemasikati.Tembiricha mangwanani nemanheru ishoma, kubuda kwemvura kunononoka, uye tembiricha masikati nemasikati yakakwira.Iyo yakaipisisa iyo fluidity uye kubatana, zvakanyanya kuoma kuvimbisa kunaka.
Nguva yekutumira: Jul-01-2022