Ziziphi iintlobo ze-retarders?

I-retarders izongezo zekhemikhali ezicotha ukuseta okanye ukuqina kwesamente. Zisetyenziswa kwizicelo zekhonkrithi apho ukumiselwa kokulibaziseka kunqweneleka, njengakwimozulu eshushu, okanye xa ukuxubana okwandisiweyo okanye amaxesha okubekwa afuneka. Kukho iintlobo ezininzi ze-retarders ezikhoyo, nganye inesethi yayo yeepropati kunye neenzuzo. Nazi ezinye iintlobo ze-retarders:

1. I-Organic Acids: Iiasidi ze-Organic ezifana ne-citric, i-tartaric, kunye ne-gluconic acid zidla ngokusetyenziswa njenge-retarders kwimathiriyeli esekwe kwisamente. Basebenza ngokusabela kunye ne-lime yamahhala kwi-samente, enciphisa inkqubo yokuhambisa amanzi. I-Organic acid retarders ayinayo ityhefu kwaye iyabola, nto leyo eyenza ukuba ibe lukhetho oluhambelana nokusingqongileyo.
2. Iswekile: Iiswekile ezifana neswekile, i-sucrose, kunye nefructose nazo zinokusetyenziswa njengezinto ezibuyisela umva kwizinto ezisekwe kwisamente. Basebenza ngokuzibophelela kumphezulu weengqungquthela ze-samente, ezinciphisa inkqubo ye-hydration. I-Sugar retarders idla ngokusetyenziswa ngokudibeneyo kunye nezinye i-retarders ukubonelela ixesha lokumisela elilawulwayo.
3. Iityuwa ze-Inorganic: Iityuwa ze-inorganic ezifana ne-borax, i-zinc sulfate, kunye ne-sodium silicate ziqhele ukusetyenziswa njenge-retarders kwizinto ezisekelwe kwi-samente. Basebenza ngokwenza ifilimu encinci phezu kweengqungquthela zesamente, ezinciphisa inkqubo ye-hydration. I-inorganic retarders yetyuwa idla ngokusetyenziswa ngokudityaniswa ne-asidi ephilayo okanye i-sugar retarders ukunika ixesha lokumisela elihambelanayo neliqikelelwayo.
4. I-Lignosulfonates: I-Lignosulfonates yi-polymers yendalo ephuma kwi-pulp yomthi. Ngokuqhelekileyo zisetyenziswa njenge-retarders kwizinto ezisekelwe kwi-samente, njengoko zisebenza ngokuzibophelela kumphezulu weengqungquthela ze-samente kunye nokunciphisa inkqubo yokucoca. I-Lignosulfonate retarders ngokuqhelekileyo isebenza ngakumbi kwi-samente ephezulu ye-alumina kune-samente ye-Portland eqhelekileyo.
5. I-Hydroxycarboxylic Acids: I-Hydroxycarboxylic acids ezifana ne-gluconic kunye ne-citric acid ziqhele ukusetyenziswa njenge-retarders kwimathiriyeli esekwe kwisamente. Basebenza ngokutshisa i-calcium ions yasimahla kwisamente, ethoba inkqubo yokufakwa kwamanzi. I-Hydroxycarboxylic acid retarders isoloko isetyenziswa ngokudityaniswa nezinye iiretarders ukunika ixesha lokuseta elingaguqukiyo nelinokuxelwa kwangaphambili.
6. I-Polycarboxylate Ether (PCE) I-Superplasticizers: I-PCE i-superplasticizers isetyenziswa ngokuqhelekileyo njenge-retarders kwizicelo zekhonkrithi apho ixesha lokumisela ukulibaziseka linqweneleka. Basebenza ngokusabalalisa amaqhekeza e-samente kunye nokunciphisa ukunyanzeliswa kwamanzi, okunciphisa inkqubo ye-hydration. I-PCE retarders idla ngokusetyenziswa ngokudibeneyo kunye nezinye i-superplasticizers ukunika ixesha elihambelanayo neliqikelelwayo lokumisela.

Ukuqukumbela, ii-retarders ziyinxalenye ebalulekileyo yezinto ezisekelwe kwi-samente, njengoko zinika ixesha lokumisela elilawulwayo kwaye zinokunceda ukuphucula ukusebenza kwezinto. Uhlobo lwe-retarder esetyenzisiweyo luya kuxhomekeka kwisicelo esithile kunye nexesha elifunekayo lokumisela, kunye neempawu zesamente kunye nezinye izongezo ezisetyenzisiweyo. Ngokukhetha uhlobo olululo lweretarder, iikontraka neenjineli zinokuqinisekisa ukuba imathiriyeli esekwe kwisamente yomelele, yomelele, kwaye iqhuba kakuhle ekuhambeni kwexesha.