Idethi Yokuthumela: 19, Sep, 2022
I-Retarder iyingxube engavimbela ukugeleza kukasimende futhi yandise isikhathi soguquko lwengxube isuka kupulasitiki iye esimweni esiqinile. Ngakho-ke, ingasetshenziswa kukhonkolo yezentengiselwano ukuze kuthuthukiswe ukugcinwa kwe-slump kokhonkolo. Ibalulekile kukhonkolo yezentengiselwano. izithako ezixubile.
Eqinisweni, indima ye-retarders ingaphezu kokuthuthukisa ipulasitiki kakhonkolo wezohwebo.
(1) Iningi lama-retarders linomsebenzi othile wokwenza ipulasitiki, kanti amanye ama-retarder anomphumela wokunciphisa amanzi ukudlula lowo osetshenziswa kakhulu ama-superplasticizer. Ukuhlolwa kubonise ukuthi umphumela wokunciphisa amanzi we-sodium gluconate evame ukusetshenziswa izikhathi eziningana kune-superplasticizers esekelwe naphthalene evame ukusetshenziswa. kuqashelwe. Ngesikhathi sokwakhiwa kokushisa okuphezulu, ukwandisa umthamo we-sodium gluconate, izindleko zokwakha ngeke zikhuphuke, ngoba umthamo we-ejenti yokunciphisa amanzi ehambisanayo ungancishiswa kakhulu.
Eqinisweni, indima ye-retarders ingaphezu kokuthuthukisa ipulasitiki kakhonkolo wezohwebo.
(1) Iningi lama-retarders linomsebenzi othile wokwenza ipulasitiki, kanti amanye ama-retarder anomphumela wokunciphisa amanzi ukudlula lowo osetshenziswa kakhulu ama-superplasticizer. Ukuhlolwa kubonise ukuthi umphumela wokunciphisa amanzi we-sodium gluconate evame ukusetshenziswa izikhathi eziningana kune-superplasticizers esekelwe naphthalene evame ukusetshenziswa. kuqashelwe. Ngesikhathi sokwakhiwa kokushisa okuphezulu, ukwandisa umthamo we-sodium gluconate, izindleko zokwakha ngeke zikhuphuke, ngoba umthamo we-ejenti yokunciphisa amanzi ehambisanayo ungancishiswa kakhulu.
Ukusetshenziswa ngokweqile kwe-retarder ekwakheni ukhonkolo wezohwebo akukhuthazwa. Ukusetshenziswa ngokweqile kwe-retarder kukhonkolo ngeke nje kuthinte ukuthuthukiswa kwamandla okuqala kokhonkolo, kodwa futhi kuthinte inqubekelaphambili yokwakha. Ngenxa yesimo sepulasitiki sesikhathi eside sikakhonkolo, sizovezwa umoya nelanga emkhathini, futhi amanzi endaweni ekhonkolo azothinteka. Inani elikhulu lokuhwamuka kwandisa ukulahlekelwa kwamanzi phezu kukakhonkolo, okuholela emifantwini emincane eminingi. Njengoba ukulahlekelwa kwamanzi kwanda, imifantu ithuthukela ekujuleni, izinga le-liquid lamanzi ezimbotsheni zekhonkrithi liyehla, ukucindezela okubi okukhiqizwa kancane kancane kuyanda, futhi ukuncipha okubangelwa Amandla abangela ukhonkolo ukuba unciphise ngenxa yokulahlekelwa kwamanzi.
Ukhonkolo esimweni sepulasitiki isikhathi eside kuzodala ukopha kanye nokuguquguquka okungalingani phakathi kwama-aggregate nezinto zikasimende. Ngokusho kokuhlolwa, i-plastic shrinkage yekhonkrithi esimweni sepulasitiki isikhathi eside ingafinyelela ku-1%, okunomthelela omkhulu kwikhwalithi yekhonkrithi.
Isikhathi sokuthumela: Sep-19-2022
