Idethi yokuthunyelwe:26,Feb,2024
Izici ze-retarder:
Kunganciphisa izinga lokukhululwa kokushisa kwe-hydration yemikhiqizo yokhonkolo yezentengiselwano. Njengoba sonke sazi, ukuthuthukiswa kwamandla okuqala kakhonkolo wezohwebo kuhlobene eduze nokuvela kwemifantu kukhonkolo yezentengiselwano. I-hydration yangaphambi kwesikhathi iyashesha kakhulu futhi izinga lokushisa liyashintsha ngokushesha, okungase kubangele kalula imifantu kukhonkolo yezentengiselwano, ikakhulukazi ukhonkolo wokuthengisa onevolumu enkulu. Njengoba izinga lokushisa langaphakathi lekhonkrithi yezohwebo likhuphuka futhi kunzima ukulahla, umehluko omkhulu wokushisa phakathi kwangaphakathi nangaphandle uzokwenzeka, okuzoholela ekuveleni kokuqhekeka kokhonkolo lwezentengiselwano, okuzothinta kakhulu izinga lekhonkrithi yezentengiselwano. Ithinta ikhwalithi yokhonkolo yezentengiselwano. I-retarder yekhonkrithi yezentengiselwano ingasithuthukisa ngempumelelo lesi simo. Ingavimbela izinga lokukhishwa kokushisa kokushisa kwe-hydration, yehlise izinga lokukhishwa kokushisa futhi inciphise izinga lokushisa, ivimbele ngokuphumelelayo ukwenzeka kokuqhekeka kwangaphambi kwesikhathi kukhonkolo yezentengiselwano.
Kunganciphisa ukulahlekelwa kokuwohloka kokhonkolo wezohwebo. Ukuzijwayeza kubonise ukuthi banganweba kakhulu isikhathi sokuqala sokusetha ikhonkrithi yezentengiselwano. Ngesikhathi esifanayo, isikhathi sokuphumula phakathi kokumiswa kokuqala kanye nokuhlelwa kokugcina kokhonkolo wezohwebo nakho kufushane, okunganciphisi nje ukulahlekelwa kokuwohloka kokhonkolo, kodwa akuthinti amandla okuqala okukhonkolo kwezentengiselwano. ukwanda. Inenani elihle elisebenzayo futhi isetshenziswa ngokwandayo ekwakhiweni kukakhonkolo wezentengiselwano.
Umthelela emandleni. Ngokombono wokuthuthukiswa kwamandla, amandla okuqala okhonkolo wezentengiselwano ohlanganiswe ne-retarder aphansi kunalowo wokhonkolo ongaxutshiwe, ikakhulukazi amandla we-1d kanye ne-3d. Kodwa ngokuvamile ngemva kwezinsuku ezingu-7, lezi ezimbili zizoncipha kancane kancane, futhi inani le-retarder elengeziwe lizokhuphuka kancane.
Ngaphezu kwalokho, njengoba inani le-coagulant elifakwe ku-beam likhuphuka, amandla okuqala ancipha kakhulu futhi ukuthuthukiswa kwamandla kuthatha isikhathi eside. Kodwa-ke, uma ukhonkolo wezohwebo uxubene kakhulu futhi isikhathi sokubeka ikhonkrithi yezentengiselwano side kakhulu, ukuhwamuka nokulahlekelwa kwamanzi kuzodala imiphumela ehlala njalo futhi engenakutholakala emandleni okhonkolo wezohwebo.
Ukukhethwa kwe-retarder:
① Ukhonkolo wezentengiso nokhonkolo wevolumu enkulu othelwa ngokuqhubekayo emazingeni okushisa aphezulu ngokuvamile kufanele uthululwe ngokwezendlalelo ngenxa yokuphazamiseka kokuthela kanye noma izingxenye eziwugqinsi. Ukuqinisekisa ukuthi izingqimba ezingenhla neziphansi zihlangene kahle ngaphambi kokumiswa kokuqala, ukhonkolo lwezentengiselwano luyadingeka Inesikhathi eside sokusetha sokuqala kanye nezindawo ezinhle zokuhlehlisa.
Ukwengeza, uma ukushisa kwe-hydration ngaphakathi kwekhonkrithi yezohwebo kungalawulwa kahle, kuzovela imifantu yokushisa, okuzonciphisa ukuphakama kwezinga lokushisa. Ama-ejenti okunciphisa amanzi asetshenziswa kakhulu, ama-retardants, nama-ejenti anciphisa amanzi abambezelekayo, njenge-citric acid.
② Ukhonkolo wezohwebo onamandla aphezulu ngokuvamile unesilinganiso sehlabathi esiphansi uma kuqhathaniswa nesilinganiso esiphansi sikasimende samanzi. I-aggregate eqinile inamandla amakhulu kanye nesamba esikhulu sikasimende. Lokhu kudinga ingxenye enkulu kasimende kanye nokusetshenziswa kwama-ejenti okunciphisa amanzi asezingeni eliphezulu. Ngaphezu kwalokho, ama-ejenti okunciphisa amanzi asebenza kahle kakhulu nawo ayadingeka. Ingaletha izinzuzo ezithile zezomnotho.
Izinga lokunciphisa amanzi lama-ejenti anciphisa amanzi asebenza kahle kakhulu ngokuvamile lingama-20% kuya ku-25%. Ama-ejenti okunciphisa amanzi asebenza kahle kakhulu e-China uchungechunge lwe-Nye. Ama-ejenti okunciphisa amanzi asebenza kahle kakhulu ngokuvamile andisa ukulahlekelwa ukuwohloka, ngakho avame ukusetshenziswa kanye nama-retarders ukuze kuthuthukiswe ukusebenza kwengxube nokunciphisa ukulahlekelwa uketshezi ngokuhamba kwesikhathi.
③ Ukupompa kudinga ukhonkolo wezentengiselwano ukuze ube ne-fluidity, ukungahlukanisi, ukungopha, kanye nezindawo zokuwohloka okuphezulu ezidingwa inqubo ngenkathi uqinisekisa amandla. Ngakho-ke, ukuhlukaniswa kwayo okuhlanganisiwe kuphakeme kunokhonkolo ojwayelekile wezohwebo. Yiba nesandla esiqinile. Kukhona eziningi ezitholakalayo:
Umlotha wokundiza: Yehlisa ukushisa kwe-hydration futhi ithuthukise ukuhlangana kukakhonkolo wezohwebo.
I-ejenti evamile yokunciphisa amanzi: njenge-ejenti yokunciphisa amanzi ye-calcium yokhuni, engasindisa usimende, ikhulise uketshezi, ibambezele izinga lokukhishwa kokushisa kwe-hydration, futhi andise isikhathi sokuqala sokusetha.
I-ejenti yokupompa: Iwuhlobo lwe-ejenti ephuphumayo engathuthukisa kakhulu uketshezi lukakhonkolo wezentengiselwano, yandise isikhathi sokugcina uketshezi, futhi inciphise ukulahlekelwa ukuwohloka ngokuhamba kwesikhathi. Njengoba igama liphakamisa, iyinhlanganisela eyenzelwe ukupompa. Ama-ejenti okunciphisa amanzi asebenza kahle kakhulu kanye nama-ejenti afaka umoya-mpilo angasetshenziswa nakukhonkolo ompompiwe wezohwebo, kodwa awavamile ukusetshenziswa.
Isikhathi sokuthumela: Feb-26-2024
