Ukumelana nokuqhekekai-concrete face slab ibaluleke kakhulu empilweni yesevisi yedamu elibhekene ne-rockfill (CFRD) likakhonkolo.fly umlotha ,i-MgO expansive agent, kanye ne-shrinkage-reducing admixture(SRA) ezintweni eziwumshini, ukushwaqeka okomisa kanye nokumelana nokuqhekeka kokhonkolo we-face slab kuyacutshungulwa bese kuqhathaniswa nokhonkolo oyinkomba. of binder) ithuthukisa amandla kakhonkolo lapho usukhulile. Ngokuphambene, ukungezwa kwe-ejenti enwebekayo engu-6%MgO noma u-1%SRA kunciphisa amandla okucindezela, ukuhlukanisa amandla okuqina kanye nokushuba kokugcina kuye kumadigri athile ngeminyaka ehlukahlukene.Ukufakwa kwe-20% fly ash,6%MgO expansive agent, kanye I-%SRA inganciphisa ukushwabana okomile ngeminyaka eyahlukene futhi ithuthukise ukumelana nokuqhekeka kwangaphambi kwesikhathi kukakhonkolo, kuyilapho ukufakwa kwe-ejenti enwebekayo engu-6%MgO kusiza kakhulu ukuvimbela ukuthuthukiswa kokushwabana kanye nokwenza ngcono ukumelana nokuqhekeka kukakhonkolo kunokwengezwa kokundiza okungu-20% umlotha noma 1%SRA.
Idamu le-concrete face rockfill (i-CFRD) idamu le-rockfill eline-rockfill njengamandla amakhulu kanye nobuso bukakhonkolo obukhuphuka nomfula njengomzimba oyinhloko omelene nokuphuma kwamanzi. Ngenxa yezici zayo zokuphepha okuhle, ukuzivumelanisa nezimo okuqinile, isikhathi esifushane sokwakha kanye nezindleko eziphansi, amadamu kakhonkolo afaka ama-rockfill asephenduke enye yezinhlobo zamadamu ezisetshenziswa kakhulu ekwakhiweni kwedamu. Ama-slabs kakhonkolo ayizakhiwo ezacile nezifana nemicu ezijwayele ukuqhekeka ngenxa yokushintsha kwezinga lokushisa, ukuwohloka kwevolumu kanye nokuhlaliswa kwesisekelo sedamu. Emzimbeni wedamu, uma kukhona ukuqhekeka ebusweni bukakhonkolo, kuzolimaza ubuqotho nokuqina kwesakhiwo somzimba wedamu, futhi igebe elibangelwa ukuqhekeka kwepuleti lobuso lingavumela amanzi angaphandle ukuthi angene kukhonkolo, okubangela ngqo ukuvuza komzimba wedamu. Ngakho-ke, ukuthuthukisa ukumelana nokuqhekeka kwama-slabs obuso bukakhonkolo kuyindaba ebalulekile ehlobene nokusebenza okuphephile kwamadamu okufaka ukhonkolo ebusweni be-rockfill. Umkhuba wamanje wobunjiniyela kanye nocwaningo lubonisa ukuthi izinyathelo zobuchwepheshe eziyinhloko zokuthuthukisa ukumelana nokuqhekeka kokhonkolo wobuso zihlanganisa ukulawula ikhwalithi yezinto ezisetshenziswayo zikakhonkolo, ukuqinisa isilinganiso sokuxuba ukhonkolo, ukwengeza umlotha wempukane nokwengeza inani elifanele lemicu.Izingxenye eziyinhloko zikakhonkolo I-shrinkage reducer iwuhlobo lwezinhlanganisela eziphilayo ze-polyalcohol noma ze-polyether kanye nokuphuma kwazo. Ucwaningo luye lwabonisa ukuthi ukungezwa kwe-ejenti yokunciphisa ukushwabana kunganciphisa ukungezwani okungaphezulu kwamanzi ezimbotshana zikakhonkolo, ngaleyo ndlela kunciphise ukucindezeleka kokuncipha okukhiqizwa lapho ama-capillary pores elahlekelwa amanzi, futhi kuthuthukise ukumelana nokuqhekeka kukakhonkolo ngezinga elithile. Ukwengezwa kwe-agent ye-MgO yokwandisa ngesikhathi sokulungiselela ukhonkolo kuyindlela evamile yokulawula imifantu. Njengoba i-ejenti yokwandisa i-MgO izokhiqiza ukunwetshwa kwevolumu ethile ngesikhathi sokusetha ukhonkolo kanye nenqubo yokuqina, ingakwazi ukunxephezela ukuncipha kwekhonkrithi, okuhlanganisa ukuncipha kwezinga lokushisa, ukuncibilika okomisa kanye nokuzikhukhumeza, ngaleyo ndlela kunciphise ukuvela kokuqhekeka kukakhonkolo. Njengamanje, i-ejenti yokwandisa i-MgO isetshenziswe ngempumelelo kukhonkolo enkulu yesiteshi sikagesi wamanzi futhi yazuza umphumela omuhle wokunqanda ukuqhekeka. Kodwa-ke, kukhona izifundo ezimbalwa ngomphumela wokunciphisa ukushwabana kanye ne-ejenti yokwandisa i-MgO ekumelaneni nokuqhekeka kukakhonkolo wobuso.
Isikhathi sokuthumela: Mar-09-2022