Gypsum retarder
I-Gypsum retardants idlala indima ebalulekileyo kumashishini okwakha kunye nezixhobo zokwakha, ikhonza ukulawula ixesha lokumisela iimveliso ezisekelwe kwi-gypsum ukuqinisekisa ukusebenza okungcono kunye nokusetyenziswa. Phakathi kwezi retardants, i-organic acids, iityuwa ezinyibilikayo, i-phosphates esisiseko, kunye neeprotheni zizinto eziphambili eziphawulwe ngokusebenza kwazo. Iiasidi ze-organic ezibalaseleyo eziqeshwe njenge-retarders ziquka i-citric acid, i-sodium citrate, i-tartaric acid, i-potassium tartrate, i-acrylic acid, kunye ne-sodium acrylate. Kolu luhlu, i-citric acid kunye netyuwa yesodium ifumene ingqwalaselo ebalulekileyo ngenxa yeempawu zabo ezibambezelayo ezibonakaliswe nakwidosi ezincinci. Oku kusebenza kuphezulu kuluncedo ngakumbi kwizicelo ezahlukeneyo zegypsum, njengoko kuququzelela amaxesha amade okusebenza ngelixa kugcinwa umgangatho ofunekayo wemveliso yokugqibela. Ukongeza kwi-organic acids, ii-phosphate retarders ezifana ne-sodium hexametaphosphate kunye ne-sodium polyphosphate zisetyenziswa ngokubanzi. Ezi zixhobo zibalulekile ekudaleni iimveliso zegypsum, ezibandakanya i-gypsum edibeneyo, i-gypsum putty, kunye nezinye izinto ezibandakanyekayo ekuveliseni izinto zokwakha ze-gypsum. Umsebenzi ophambili wezi zithinteli ze-phosphate kukucothisa inkqubo yocondensation yegypsum, ukuvumela ulawulo oluphuculweyo ngexesha lokuxuba kunye nezigaba zokufaka. Ngokubandakanya ngobuchule ezi zinto zingasebenziyo, abavelisi banokwandisa ukusebenza kweemveliso zegypsum, ngaloo ndlela bephucula ukusebenza kakuhle kwiindawo zokwakha kunye nokuqinisekisa ukuba iipropati ezifunwayo zesakhiwo ziyafezekiswa. Isidingo se-retardants ethembekileyo nesebenzayo ibangele uphando olubanzi kule ndawo, ngokukodwa kugxininise kwiindlela zokusebenzisana kwezi zinto kunye ne-gypsum. Iziphumo zibonisa ukuba i-molecular structure ye-retarders idlala indima ebalulekileyo ekusebenzeni kwabo, okukhokelela kwizinto ezintsha eziqhubekayo ekuqulunqweni kokwandisa inzuzo yabo. Njengoko ishishini lokwakha liqhubeka nokuvela, imfuno yomgangatho ophezulu, imveliso yegypsum eyomeleleyo ihlala ingatshintshi. Ngako oko, uphuhliso nokusetyenziswa kwee-arhente ezibambezelayo zibalulekile ukuze kuhlangatyezwane neemfuno ezingqongqo zeeprojekthi zokwakha zale mihla. Ukongeza, uyilo olukhathalela indalo esingqongileyo lwezi zixhobo luphantsi koqwalaselo, lukhuthaza abaphandi ukuba baphonononge iinketho ezizinzileyo kunye neendlela ezinokonakala kwi-biodegradable kwi-retardants zemveli. Ibhalansi phakathi kokusebenza kakuhle kunye neempembelelo zokusingqongileyo zibalulekile njengoko abavelisi bejolise ekuboneleleni ngezisombululo zegypsum ezikumgangatho ophezulu ezihambelana neenjongo zokuzinza kwishishini. Ngokubanzi, ukusetyenziswa kwe-gypsum retardants, ngakumbi i-organic acids, iityuwa ezinyibilikayo, kunye ne-phosphates, ngumba obalulekileyo weemveliso zokwakha zegypsum eziphucula ukusetyenziswa kwazo. Ngokusebenzisa ii-agent ezahlukeneyo zokurhoxisa, abakhi banokuqinisekisa iinkqubo zokusebenza ezifanelekileyo kunye nokukhusela ingqibelelo kunye nokuphila ixesha elide kwezakhiwo. Inkqubela phambili eqhubekayo kuphononongo lwe-gypsum retardation ayiphuculi ukusebenza kwemveliso kuphela kodwa ikwanegalelo kwindlela ezinzileyo kushishino lokwakha, ekugqibeleni ikhokelele kwiziphumo ezingcono zombini malunga nokusebenza kunye noxanduva lokusingqongileyo. Ukuqukumbela, ukuqonda iintlobo ezahlukeneyo ze-gypsum retardants ezisetyenziswayo ngoku kubalulekile kubathathi-nxaxheba kwicandelo lokwakha, njengoko libaxhobisa ukuba bakhethe izongezo ezifanelekileyo ezifezekisa iziphumo ezinqwenelekayo ngelixa bebambelela kwimisebenzi ezinzileyo. Olu lwazi luqhubela phambili ummandla wezinto zokwakha, luqinisekisa ukuba ikamva lokuveliswa kwegypsum liphawulwa ngokusungula izinto ezintsha, ukusebenza kakuhle, kunye nokukhathalela indalo esingqongileyo.
