Post Date:6, Chivabvu, 2024
Manyuko ematope akasiyana, uye zvikamu zvawo zvakasiyanawo. Madhaka ari mujecha rekongiri nematombo akakamurwa kuita zvikamu zvitatu: upfu hweraimu, ivhu, uye calcium carbonate. Pakati pawo, hupfu hwematombo ndiwo zvidimbu zvakanaka mujecha rakagadzirwa rine saizi isingasviki 75 μm. Iro dombo rimwechete remubereki sejecha rakagadzirwa uye rine mamineral akafanana. Chinhu chikuru iCaCO3, inova chikamu chekugadzika kwejecha rakagadzirwa.
(1) Tsvagiridzo pamusimboti wekushanda wedhaka poda uye polycarboxylic acid inoderedza mvura mumiririri:
Zvinowanzotendwa kuti chikonzero chikuru nei hupfu hwematope hunokanganisa kongiri yakasanganiswa ne lignosulfonate uye naphthalene-based water reduction agents ndiyo makwikwi ekushambadza pakati pehupfu hwematope uye simenti. Hapasati pasisina tsananguro yakabatana pamusimboti wekushanda wehupfu yedhaka uye polycarboxylic acid inoderedza mvura. Dzimwe nyanzvi dzinofunga kuti nheyo yekushanda yehupfu hwevhu uye mvura inoderedza mvura yakafanana neyesimende. Mushonga wekudzikisa mvura unoshambadzirwa pamusoro pesamende kana dhaka poda nemapoka eanionic. Musiyano ndewekuti chiyero uye chiyero chekushambadza kwemvura-kudzikisa agent nedhaka poda yakakura kwazvo kupfuura yesamende. Panguva imwecheteyo, iyo yakakwirira chaiyo nzvimbo uye yakaturikidzana chimiro chevhu zvicherwa zvakare inotora mvura yakawanda uye inoderedza yemahara mvura mune slurry, iyo inokanganisa zvakananga kuita kwekuvaka kwekongiri.
(2) Mhedzisiro yemaminerari akasiyana pakuita kwemvura inoderedza vamiririri:
Tsvagiridzo inoratidza kuti dhaka revhu chete rine kuwedzera kwakakosha uye kunyudza mvura zvivakwa zvichave nemhedzisiro yakakosha pakushanda kwekushanda uye gare gare michina yekongiri. Madhaka evhu akajairika muzvikamu zvinonyanya kusanganisira kaolin, illite uye montmorillonite. Rudzi rwakafanana rwemugadziri wekudzikisa mvura ane hunhu hwakasiyana kune hupfu hwedhaka nemhando dzakasiyana dzemaminerari, uye mutsauko uyu wakakosha zvakanyanya pakusarudzwa kwevashandi vanodzikisa mvura uye kugadzirwa kwedhaka-rinodzivirira mvura inoderedza dhaka uye anti-madhaka.
(3) Mhedzisiro yedhaka poda yemukati pane kongiri zvivakwa:
Kushanda kwekongiri hakungokanganisa kuumbwa kwekongiri, asi kunokanganisa zvakare ma mechanical properties uye kusimba kwekongiri. Huwandu hwehupfu hwemadhaka husina kugadzikana, hunoderera kana hwaoma uye huchiwedzera kana hwanyorova. Sezvo madhaka ari kuwedzera, angave ari polycarboxylate-anoderedza mvura agent kana naphthalene-based water-reducing agent, inoderedza chiyero chekudzikisa mvura, simba, uye kudonha kwekrete. Kudonha, nezvimwewo, kuunza kukanganisa kukuru kune kongiri. Chiyero chenyika "Sand for Construction" (GB/T14684-2011) chinoti kana kongiri simba giredhi iri C30 kana pane chando kuramba, anti-seepage kana zvimwe zvakakosha zvinodiwa, dope poda zviri mujecha rechisikigo haringapfuuri 3.0 %, uye dhaka remukati haripfuuri 1.0%; apo giredhi yekrete yesimba iri pasi peC30, dhaka yehupfu yehupfu haifaniri kudarika 5.0% uye dhaka rakavharwa haringapfuuri 2.0%.
Nguva yekutumira: Chivabvu-06-2024
