Zuva Rokutumira:10,Kubvumbi,2023

(1) Kupesvedzera pamusanganiswa wekongiri

Mumiriri wesimba rekutanga anogona kupfupisa nguva yekumisikidza kongiri, asi kana zviri mukati me tricalcium aluminate mu simenti zvadzikira kana kudzikira pane gypsum, sulfate inononoka kugadzika nguva ye simende. Kazhinji, mhepo yemukati mukongiri haizowedzerwe nekutanga-simba admixture, uye mhepo yemukati yekutanga-simba-inoderedza mvura-inoderedza admixture inotarirwa nemhepo yemukati yemvura-inoderedza admixture. Semuenzaniso, iyo gasi yemukati haiwedzere kana yakasanganiswa ne calcium shuga water reducer, asi ichawedzera zvakanyanya kana yasanganiswa ne calcium wood water reducer.

(2) Kukanganisa pane kongiri

Early simba mumiriri anogona kuvandudza simba rayo rekutanga; Iyo dhigirii yekuvandudza yeiyo imwechete yekutanga simba mumiriri zvinoenderana nehuwandu hwekutanga simba mumiriri, ambient tembiricha, kurapa mamiriro, mvura simende reshiyo uye simende rudzi. Mhedzisiro pasimba renguva refu yekongiri haienderani, ine yakakwirira uye yakaderera. Early simba mumiriri ane mhedzisiro yakanaka mune inonzwisisika dhamu, asi kana iyo dosi yakakura, ichava nemhedzisiro yakaipa pakusimba kwekupedzisira uye kusimba kwekongiri. Simba rekutanga-kudzikisa mvura mumiriri zvakare ine yakanaka yekutanga simba mhedzisiro, uye kuita kwayo kuri nani pane kuya kwekutanga simba mumiriri, iyo inogona kudzora shanduko yesimba rinononoka. Triethanolamine inogona kukurudzira simba rekutanga resimende. Inogona kumhanyisa hydration ye tricalcium aluminate, asi inonoke hydration ye tricalcium silicate uye dicalcium silicate. Kana zvinyorwa zvakanyanyisa, simba rekrete richaderedzwa.

Durable sulfate yekutanga simba mumiriri haina mhedzisiro pakusimbisa ngura, nepo chloride yekutanga simba mumiriri ine huwandu hukuru hweiyo chloride ion, iyo inosimudzira kusimbisa ngura. Kana iyo dosi yakakura, iyo kemikari corrosion resistance, kupfeka kuramba uye chando kuramba kuchaderedzwawo. Kune kongiri, kuderedza kuchinjika simba kwekongiri uye kuwedzera kwekutanga shrinkage kwekongiri kune zvishoma zvinokanganisa padanho rekupedzisira rekongiri. Parizvino, kushandiswa kwechloride-ine additives kwakarambidzwa muyero mutsva yenyika. Kuti udzivise kuitika kwechloride munyu pakusimbisa corrosion, rust inhibitor uye chloride munyu zvinowanzoshandiswa pamwechete.

Paunenge uchishandisa sulfate yekutanga simba mumiriri, ichawedzera alkalinity yekongiri yemvura chikamu, saka zvinofanirwa kucherechedzwa kuti kana iyo yakaunganidzwa ine inoshanda silica, inosimudzira kuita pakati pealkali uye aggregate, uye inokonzera kongiri kukuvara nekuda kwealkali. kuwedzera.