Post Date:26,Feb,2024
Hunhu hwe retarder:
Inogona kuderedza kusunungurwa kwehuwandu hwekupisa kwe hydration yezvigadzirwa zvekongiri zvekutengesa.Sezvatinoziva tese, kutanga kwesimba rekusimudzira kwekongiri yekutengeserana kwakabatana zvakanyanya nekuitika kwekutsemuka mukongiri yekutengesa.Early hydration inokurumidza uye tembiricha inoshanduka nekukurumidza, izvo zvinogona kukonzera kutsemuka kwekongiri yekutengesa, kunyanya yakakura-vhoriyamu yekutengesa kongiri.Sezvo tembiricha yomukati yekutengeserana kongiri inosimuka uye yakaoma kudzima, musiyano mukuru wekushisa pakati pemukati nekunze uchaitika, izvo zvinozoita kuti pave nekutsemuka kwekongiri yezvokutengeserana, izvo zvichakanganisa zvakanyanya kunaka kwekongiri yezvokutengeserana.Inobata kunaka kwekongiri yekutengesa.Commercial kongiri retarder inogona kuvandudza mamiriro aya.Inogona kuvharidzira kupisa kusunungurwa kwehuwandu hwekupisa kwe hydration, kuderedza kupisa kwekushisa uye kuderedza kupisa kwepamusoro, kudzivirira kuitika kwekutanga kwekutsemuka kwekongiri yekutengesa.
Inogona kuderedza kudonha kurasikirwa kwekongiri yekutengesa.Kudzidzira kwakaratidza kuti vanogona kuwedzera zvakanyanya nguva yekutanga yekuisa yekongiri yekutengesa.Panguva imwecheteyo, nguva yepakati pakati pekugadzika kwekutanga uye kugadzika kwekupedzisira kwekongiri yekutengesa zvakare ipfupi, iyo isingangodzikisi kurasikirwa kwekongiri, asi haikanganisi simba rekutanga rekutengesa kongiri.kuwedzera.Iyo ine yakanaka inoshanda kukosha uye iri kuwedzera kushandiswa mukutengesa kongiri kuvaka.
Mhedzisiro pasimba.Kubva pakuona kwekukura kwesimba, simba rekutanga rekongiri yekutengeserana yakasanganiswa neretarder yakaderera pane yekongiri isina kusanganiswa, kunyanya 1d uye 3d simba.Asi kazhinji mushure memazuva manomwe, iwo maviri anozodzika zvishoma nezvishoma, uye huwandu hweretarder hwakawedzerwa huchawedzera zvishoma.
Uye zvakare, sezvo huwandu hwecoagulant inosanganisirwa mudanda hunowedzera, simba rekutanga rinoderera zvakanyanya uye kuvandudzwa kwesimba kunotora nguva yakareba.Zvisinei, kana kongiri yekutengeserana yakanyanyisa-yakavhenganiswa uye nguva yekugadzika kwekongiri yekutengeserana yakareba, kuputika uye kurasikirwa kwemvura kunokonzera kusingaperi uye kusingagoneki migumisiro pane simba rekutengesa konkrete.
Sarudzo yeretarder:
① Kongiri yekutengeserana uye yakakura-vhoriyamu kongiri yekutengeserana inodururwa nguva dzose pakupisa kwepamusoro kazhinji inofanirwa kudururwa muzvikamu nekuda kwekukanganisika kwekudira kamwe chete kana zvikamu zvakakora.Kuti ave nechokwadi chokuti mazamu epamusoro uye ezasi akabatanidzwa zvakanaka asati atanga kugadzika, kongiri yekutengeserana inodiwa Iine nguva yakareba yekutanga yekugadzirisa uye yakanaka yekudzorera zvinhu.
Mukuwedzera, kana kupisa kwe hydration mukati mekutengeserana kwekongiri kusingadzorwi zvakanaka, kupisa kwekushisa kuchaonekwa, izvo zvinoderedza kukwira kwekushisa.Anowanzo shandiswa ekudzikisa mvura, maretardants, uye anodzora mvura ekudzikisa maajenti, akadai se citric acid.
② Yakakwirira-simba rekutengesa kongiri kazhinji ine yakaderera jecha mwero uye yakadzikira mvura-simende reshiyo.Iyo coarse aggregate ine simba rakakura uye yakawanda simende.Izvi zvinoda chikamu chakakwirira chesimende uye kushandiswa kwepamusoro-soro-kuderedza mvura.Mukuwedzera, kushandiswa kwepamusoro-kuderedza mvura kunodiwawo.Inogona kuunza mamwe mabhenefiti ehupfumi.
Muyero wekudzikisa mvura wevamiririri vepamusoro-vanoita kuderedza mvura kazhinji kazhinji 20% kusvika 25%.Iyo inonyanya kushandiswa-yakanyanya-inoshanda yekudzikisa mvura muChina ndeye Nye series.Yakanyanya-inoshanda yekudzikisa mvura maajenti anowanzo wedzera kudonha kurasikirwa, saka ivo vanowanzoshandiswa pamwe chete nevanodzoreredza kuvandudza kushanda kwemusanganiswa uye kuderedza kurasikirwa kwemvura nekufamba kwenguva.
③ Kupomba kunoda kongiri yekutengeserana kuve neiyo fluidity, kusaparadzanisa, kusabuda ropa, uye yakakwirira slump zvivakwa zvinodikanwa nekuita uku uchisimbisa simba.Naizvozvo, kuunganidzwa kwayo kwakakwira kupfuura iyo yekongiri yakajairwa yekutengesa.Iva akaoma.Kune akawanda anowanikwa:
Fly ash: Inoderedza kupisa kwe hydration uye inovandudza kubatana kwekongiri yekutengesa.
Yakajairika mvura yekudzikisa mumiriri: senge huni calcium yekudzikisa mvura, iyo inogona kuchengetedza simende, kuwedzera fluidity, kunonoka kuburitsa chiyero chekupisa kwe hydration, uye kuwedzera nguva yekutanga kuseta.
Pumping agent: Imhando ye fluidizing agent iyo inogona kuvandudza zvakanyanya kuyerera kwekongiri yekutengesa, kuwedzera iyo fluidity kuchengetedza nguva, uye kuderedza kurasikirwa kwekudonha nekufamba kwenguva.Sezvinoratidzwa nezita racho, musanganiswa wakagadzirirwa kupomba.Yakakwirira-yakanyatsogadzirisa mvura yekudzikisa maajenti uye air-entraining agents anogonawo kushandiswa mupombi yekutengesa kongiri, asi haiwanzo kushandiswa.
Nguva yekutumira: Feb-26-2024