Post Date: 13 Jun, 2022
Admixtures inoreva kirasi yezvigadzirwa zvinogona kunyatso kuvandudza imwe kana kupfuura zvivakwa zvekongiri.Zviri mukati maro zvinongoverengera zvisingasviki 5% zvesimende, asi zvinogona kuvandudza zvakanyanya kushanda, simba, kusimba kwekongiri kana kugadzirisa nguva yekumisikidza uye kuchengetedza simende.
1. Kurongwa kwezvakasanganiswa:
Concrete admixtures anowanzo kupatsanurwa zvichienderana nemabasa avo makuru:
a.Admixtures yekuvandudza rheological properties yekrete.Iko kunonyanya kuderedza mvura, mhepo inopinza, iyo inopomba uye zvichingodaro.
b.Admixtures yekugadzirisa kugadzika uye kuomesa zvinhu zvekongiri.Iko kune kunyanya kudzoreredza, accelerators, ekutanga simba vamiririri, nezvimwe.
c.Admixtures yekugadzirisa mhepo yekongiri.Iko kune kunyanya kupinza mhepo, maejenti anopinza mhepo, anopupa, nezvimwe.
d.Admixtures yekuvandudza kongiri kusimba.Iko kune kunyanya air-entraining agents, kudzivirira mvura, rust inhibitors nezvimwe zvakadaro.
e.Admixtures inopa zvakakosha zvekongiri.Iko kune zvakanyanya antifreeze, ajenti yekuwedzera, colorant, air-entraining agent uye anopomba agent.
2. Inowanzoshandiswa superplasticizers
Mvura inoderedza mumiririri inoreva musanganiswa unogona kuderedza kushandiswa kwemvura kusanganisa pasi pemamiriro akafanana ekongiri inodonha;kana inogona kuwedzera kongiri inodonha kana kongiri musanganiswa reshiyo uye kushandiswa kwemvura kunoramba kusingachinji.Zvinoenderana nehukuru hwemvura yekudzikisa mwero kana kuwedzera kwekudonha, yakakamurwa kuita mapoka maviri: yakajairwa yekudzikisa mvura mumiriri uye yakanyanya-inoshanda yekudzikisa mvura mumiriri.
Mukuwedzera, kune majekiseni ekuderedza mvura anoumbwa, akadai semhepo-inopinza mvura inoderedza vamiririri, iyo ine zvose zvinoderedza mvura uye mhepo inopinza mhepo;kutanga-simba-kuderedza mvura-vamiririri vane zvose zvinoderedza mvura uye kutanga-simba-kuvandudza migumisiro;Mvura inoderedza agent, inewo basa rekunonoka kugadzirisa nguva nezvimwe zvakadaro.
Basa guru rekudzikisa mvura:
a.Zvinonyanya kunatsiridza fluidity ine yakafanana musanganiswa ratio.
b.Kana iyo fluidity uye simende dosi isina kuchinjika, deredza kushandiswa kwemvura, kuderedza mvura-simende reshiyo, uye kuwedzera simba.
c.Kana iyo fluidity uye simba zvikaramba zvisingachinji, kushandiswa kwesimende kunochengetwa uye mutengo unoderedzwa.
d.Kuvandudza kushanda kwekongiri
e.Kuvandudza kusimba kwekongiri
f.Gadzira yakakwirira-simba uye yakakwirira-yekuita kongiri.
Polysulfonate series: kusanganisira naphthalene sulfonate formaldehyde condensate (NSF), melamine sulfonate formaldehyde polycondensate (MSF), p-aminobenzene sulfonate formaldehyde polycondensate, modified lignin sulfonate, polystyrene Sulfonates uye sulfonated sulfonated reketonesD yedu, FN, sulfonated ketonesD, aldehyde, etc. naphthalene sulfonate formaldehyde condensate.
Polycarboxylate akatevedzana: zvinobudirira kudzora yekutanga hydration maitiro uye kuderedza kudonha kurasikirwa kwekongiri.
Musiyano uripo pakati pepamusoro-inoshanda-inoderedza mvura mumiriri uye yakajairwa-inoderedza mvura inoratidzirwa zvakanyanya mune iyo yakanyanya-inoshanda yekudzikisa mvura inogona kuramba ichiwedzera fluidity mune yakakura siyana, kana kuramba ichideredza kudiwa kwemvura.Iyo inoshanda yakawanda yeakajairika mvura inoderedza ishoma.
Mhedzisiro ye superplasticizer padiki dosage haigone kushandiswa sehwaro hwekutonga kuita kweiyo superplasticizer.Izvi zvinofanira kuverengwa pakusarudza mvura inoderedza.Iyo yakakwana dosage ye superplasticizer inofanirwa kutemerwa kuburikidza nekuyedza, uye haifanirwe kushandiswa chete zvichienderana nedosage yemugadziri we superplasticizer.
Nguva yekutumira: Jun-13-2022