Gypsum retarder
Gypsum retardants inoita basa rakakosha muindasitiri yekuvaka uye yekuvakisa, ichishanda kudzora nguva yekumisikidza yezvigadzirwa zvegypsum kuti ive nechokwadi chekushanda uye kushandisa. Pakati peizvi retardants, organic acids, soluble salts, basic phosphates, uye mapuroteni zvinhu zvakakosha zvinozivikanwa nekushanda kwavo. Iyo inonyanya kuzivikanwa organic acids inoshandiswa seretarders inosanganisira citric acid, sodium citrate, tartaric acid, potassium tartrate, acrylic acid, uye sodium acrylate. Mukati mechikamu ichi, citric acid nemunyu wayo wesodium zvakatora kutariswa kwakanyanya nekuda kwesimba ravo rekudzoreredza zvinhu zvinoratidzwa kunyangwe padiki dosages. Uku kushanda kwepamusoro kunonyanya kubatsira kune akasiyana gypsum maapplication, sezvo achifambisa nguva yakareba yekushanda uchichengetedza mhando yaunoda yechigadzirwa chekupedzisira. Kuwedzera kune organic acids, phosphate retarders senge sodium hexametaphosphate uye sodium polyphosphate inoshandiswa zvakanyanya. Aya makomisheni akakosha mukugadzira zvigadzirwa zvegypsum, zvinosanganisira zvakasungwa gypsum, gypsum putty, uye zvimwe zvinhu zvinobatanidzwa mukugadzira gypsum zvekuvakisa. Basa rekutanga reaya maphosphate retarders ndere kudzikamisa iyo condensation process yegypsum, ichibvumira kukwidziridzwa kudzora panguva yekusanganisa uye matanho ekushandisa. Nekusanganisa zvine hungwaru izvi zvinodzoreredza, vagadziri vanogona kukwidziridza mashandiro ezvigadzirwa zvegypsum, nekudaro vachinatsiridza hunyanzvi panzvimbo dzekuvaka uye nekuona kuti zvimiro zvinodikanwa zvinowanikwa. Kudiwa kwevanovimbika uye vanobudirira vanoregedza kwakakurudzira kutsvagisa kwakawanda munzvimbo ino, kunyanya kutarisa nzira dzekudyidzana kwezvinhu izvi negypsum. Zvakawanikwa zvinoratidza kuti chimiro chemolecular yevanodzoreredza chinotora basa rakakosha mukubudirira kwavo, zvichitungamira kune inoenderera mberi mitsva mukugadzira kuti vawedzere mabhenefiti avo. Sezvo indasitiri yekuvaka ichienderera mberi nekushanduka, kudiwa kwemhando yepamusoro, yakasimba, yakasimba gypsum zvigadzirwa zvinoramba zviripo. Nekuda kweizvozvo, kugadziridzwa uye kushandiswa kwevashandi vepamberi vanodzosa kwakakosha pakuzadzisa izvo zviri kuramba zvichiomesera zvezvirongwa zvekuvaka zvemazuva ano. Pamusoro pezvo, dhizaini inocherechedzwa kwezvakatipoteredza yezvinhu izvi iri pasi pekuongororwa, zvichiita kuti vaongorori vaongorore sarudzo dzakasimba uye dzimwe nzira dzinogona kuparara kune dzechinyakare retardants. Huyero pakati pekuita uye kukanganiswa kwezvakatipoteredza kwakakosha sezvo vagadziri vachivavarira kupa yakakwirira-inoshanda gypsum mhinduro dzinoenderana neindasitiri inosimudzira zvinangwa. Pakazere, kushandiswa kwegypsum retardants, kunyanya organic acids, soluble salts, uye phosphates, chinhu chakakosha chezvigadzirwa zvekuvaka gypsum izvo zvinowedzera kushandiswa kwavo. Nekushandisa akasiyana siyana ekudzoreredza vamiririri, vavaki vanogona kuve nechokwadi maitiro ekushandisa uye kuchengetedza kutendeseka uye hupenyu hurefu hwezvivakwa. Kuenderera mberi kufambira mberi mukudzidza kwegypsum retardation hakungo wedzera kuita kwechigadzirwa chete asiwo kunobatsira kune imwe nzira yakagadzikana muindasitiri yekuvaka, inozopedzisira yave nemhedzisiro iri nani maererano nekushanda uye mutoro wezvakatipoteredza. Mukupedzisa, kunzwisisa marudzi akasiyana-siyana egypsum retardants ari kushandiswa pari zvino kwakakosha kune vanobatana muchikamu chekuvaka, sezvo ichivapa simba rekusarudza akakodzera ekuwedzera anowana mhedzisiro inodiwa vachiomerera kune inoenderera maitiro. Ruzivo urwu runosimudzira munda wezvivakwa zvekuvaka, kuve nechokwadi chekuti ramangwana rekugadzirwa kwegypsum rinoratidzwa nehunyanzvi, kushanda nesimba, uye kungwarira kwezvakatipoteredza.
