Iyo pesvedzero ye simenti uye admixture kuenderana pane kongiri mhando

(1) Kana iyo alkali yemukati mu simenti yakakwira, kuyerera kwekongiri kunoderera uye kurasikirwa kwekudonha kuchawedzera nekufamba kwenguva, kunyanya kana uchishandisa mvura-inoderedza vamiririri vane yakaderera sulfate. Mhedzisiro yacho inonyanya kuoneka, nepo mvura-inoderedza mumiriri ine yakakwira sulfate yemukati inogona kuvandudza zvakanyanya mamiriro aya. Izvi zvinonyanya kuitika nekuti iyo calcium sulfate iri mune yakaderera-concentration-yekudzikisa mvura inogadzirwa panguva ye synthesis uye neutralization, uye ine yakanakisa kunyungudika kwemvura. Naizvozvo, kana uchishandisa simende yakakwira-alkali, kuwedzera imwe chiyero chesodium sulfate uye hydroxyhydroxy acid munyu retarders paunobatanidza iyo inoderedza mvura inovandudza kuyerera uye kudonha kwekongiri.

(2) Kana iyo alkali yemukati ye simenti yakakwira uye pH kukosha kwepolycarboxylate yekudzikisa mvura mumiririri yakadzikira, kongiri inotanga kuburitsa acid-base neutralization reaction. Kwete chete tembiricha yekongiri inosimuka, asi zvakare inomhanyisa hydration ye simenti. Iyo fluidity uye kudonha kwekongiri kucharatidza kurasikirwa kukuru munguva pfupi. Nokudaro, paunosangana nemasimende akafanana, zvakanakisisa kusashandisa citric acid retarders asi kushandisa alkaline retarders panzvimbo, zvakadai se sodium hexametaphosphate, sodium polyphosphate, nezvimwewo, iyo inonyanya kushanda.

(3) Kana alkali iri mu simenti yadzikira, kuyerera kwekongiri kunenge kwakaderera. Mhedzisiro yekuwedzera muyero wakakodzera haisi pachena, uye kongiri inotapukira kubuda ropa. Chikonzero chikuru chechiitiko ichi ndechekuti sulfate ion content mu simenti haina kukwana, iyo inoderedza mhedzisiro yekudzivisa hydration ye tricalcium aluminate mu simenti. Panguva ino, imwe sulfate yakadai se sodium thiosulfate inofanira kuwedzerwa panguva yekubatanidza kuwedzera alkali inonyungudika mu simenti.

4 Panguva ino, ethers, esters, aliphatic uye mamwe madoro aamai akasiyana anogona kusanganiswa. Panguva imwecheteyo, zvakakosha kufunga nezvekudzikisa huwandu hwemvura yakachena-inoderedza mai doro, kuwedzera melamine uye sodium hexametaphosphate uyezve kushandisa chiyero chakakodzera che defoaming agent. Dzivisa kushandisa zvigadzirwa zvakaita semakobvu. Kushandisa thickeners hakuzoiti kuti mabubbles abude, zvichiita kuti kuwedzere kwemhepo, kuderedzwa kwekongiri uye kuderera kwesimba kuri pachena. Kana zvichidikanwa, tannic acid kana yellow lead inogona kuwedzerwa.

(5) Kana chikamu chinopupuma cheyamuro yekukuya musemende chakakwira, kongiri inongoita yero uye nyika inoshata zvakanyanya mushure mekunyarara kwemasekonzi gumi. Dzimwe nguva zvinotendwa zvisizvo kuti mwero wekudzikisa mvura wekudzikisa mvura wakanyanya kana mhepo yakawandisa inowedzerwa panguva yekubatanidza. Kutaura zvazviri, idambudziko nerubatsiro rwekukuya simende. Paunenge uchisangana nedambudziko iri, iyo defoamer inofanirwa kushandiswa zvinoenderana nehuwandu hwehuputi hwehuyamuro hwekukuya, uye mhepo inopinza mumiriri haigone kushandiswa panguva yekubatanidza.