Umhla wokuPoswa:27,NgoNovemba,2023

I-retarder yinto esetyenziswa ngokuqhelekileyo kulwakhiwo lobunjineli. Umsebenzi wayo oyintloko kukulibazisa ngokufanelekileyo ukwenzeka kwencopho yobushushu be-samente hydration, enenzuzo kumgama omde wokuthutha, ubushushu obuphezulu kunye nezinye iimeko zekhonkrithi, udaka lwesamente kunye nezinye izinto zokwakha. Gcina iplastiki phantsi kweemeko, ngaloo ndlela uphucula umgangatho wokuthululwa kwekhonkrithi; xa zichaphazeleka kwezinye iimeko ezikhethekileyo ezifana nemozulu okanye iimfuno zeshedyuli yokwakha, i-retarder nayo ifuna ukufakwa, enokuphucula ukusebenza kwekhonkrithi, ukwandisa ixesha lokubeka i-samente, kunye nokunciphisa ukuqhekeka kokwakha. Indlela yokukhetha uhlobo olufanelekileyo kunye nomthamo we-retarder ukuchaphazela ukusebenza kwekhonkrithi yesamente ngumbuzo ofanelekileyo wokufunda.

I-1.Impembelelo kwi-Clotting Time

Emva kokongeza i-retarder, ixesha lokuqala kunye nelokugqibela lokumisela ikhonkrithi lide kakhulu. I-retarders eyahlukeneyo ineempembelelo ezahlukeneyo kwixesha lokubeka ikhonkrithi kwidosi enye, kwaye i-retarders eyahlukeneyo ineempembelelo ezahlukeneyo zokunciphisa ikhonkrithi. I-retarder elungileyo kufuneka ibe nesiphumo esihle sokunciphisa xa idosi yayo incinci. Umlindi ofanelekileyo kufuneka andise ixesha lokuqala lokumisela ikhonkrithi kwaye anciphise ixesha lokugqibela lokumisela. Oko kukuthi, ixesha lokuqala kunye nelokugqibela lokumisela ikhonkrithi kufuneka lifinyezwe kangangoko kunokwenzeka.

 2.Impembelelo ekusebenzeni komxube

Kwinkqubo yobunjineli, ukuze ulungelelanise ukuthutha kunye nokuhlangabezana neemfuno zokwakha, i-retarder idla ngokufakwa kwikhonkrithi ukuphucula ukusebenza komxube wekhonkrithi kunye nokunciphisa ilahleko ye-slump ngexesha. Ukongezwa kwe-retarder kuphucula kakhulu ukufana kunye nokuzinza komxube, kugcina iplastiki ixesha elide, kuphucula umgangatho wokwakhiwa kwekhonkrithi, kunye nokuthintela ngokufanelekileyo ukuqhekeka okubangelwa ukuchithwa kwangaphambili kwekhonkrithi.

3.Impembelelo kumandla ekhonkrithi

Ukongezwa kwe-retarder kunokunyusa ngokupheleleyo amaqhekeza e-samente, okunenzuzo yokwandisa amandla ekhonkrithi phakathi kwamanqanaba aphakathi kunye nasekupheleni. Ekubeni ezinye ii-retarders nazo zinomsebenzi othile wokunciphisa amanzi, ngaphakathi koluhlu lwedosi efanelekileyo, ukuba i-dosage inkulu, umlinganiselo wesamente wamanzi womxube wekhonkrithi uya kuba mncinci, oya kunceda ukuphuhliswa kwamandla ekhonkrithi. Kwiiprojekthi zangempela, ngenxa yomthamo ogqithisileyo we-retarder, ikhonkrithi ayinakusekwa ixesha elide, kwaye amandla ekhonkrithi angenakuhlangabezana neemfuno zoyilo ngexesha lokwamkelwa kweprojekthi. Ngoko ke, kufuneka sinikele ingqalelo ekukhethweni kweentlobo ze-retarder kwaye silawule ngokungqongqo umthamo we-retarder. Kwangaxeshanye, kufuneka kwakhona siqwalasele ngokupheleleyo ungqamaniso kunye nokuziqhelanisa phakathi kweretarder kunye nezixhobo ezikrwada zekhonkrithi.