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IHydroxypropyl methyl cellulose inokuphucula ukuxhathisa kokusasazeka kodaka lwesamente

Ukuxhathisa ukusabalalisa sisalathiso esibalulekileyo sobugcisa ukulinganisa umgangatho we-anti - dispersant.IHydroxypropyl methyl cellulose yikhompawundi yepolymer enyibilikayo emanzini, eyaziwa ngokuba yiresin enyibilikayo emanzini okanye ipolima enyibilikayo emanzini.Yandisa ukuhambelana komxube ngokunyusa i-viscosity yamanzi okuxuba.Luhlobo oluthile lwe-hydrophilic polymer material, enokuthi inyibilike emanzini kwaye yenze isisombululo okanye i-disperible liquid.Iimvavanyo zibonisa ukuba xa ubuninzi benkqubo ye-naphthalene ye-superplasticizer inyuka, ukongezwa kwe-superplasticizer kuya kunciphisa ukuxhathisa ukusasazeka kwe-samente entsha yodaka.Oku kungenxa yokuba uchungechunge lwe-naphthalene oluphezulu olusebenzayo lokunciphisa amanzi lukwi-arhente esebenzayo, xa i-ejenti yokunciphisa amanzi yongezwa kudaka, i-arhente yokunciphisa amanzi kwi-particle ye-samente ebusweni obujoliswe kumphezulu wamasuntswana e-samente kunye nentlawulo efanayo, i-electric repulsion flocculation. Ukwakhiwa kweengqungquthela zesamente ezenziwe ngokwahlula, ukugoqa kwisakhiwo sokukhutshwa kwamanzi, kuya kubangela ukulahlekelwa kwenxalenye yesamente.Kwangaxeshanye, kufumaniseka ukuba ngokunyuka komxholo we-HPMC, i-anti dispersion yodaka lwesamente entsha ingcono kwaye ingcono.

Iimpawu zokomelela kwekhonkrithi:

HPMC ngaphantsi kwamanzi non-dispersive ikhonkrithi admixture wasetyenziswa kubunjineli isiseko ibhulorho kwindlela ye-expressway, kwaye ibakala amandla kuyilo C25.Emva kovavanyo olusisiseko, idosi yesamente yi-400kg, i-compound exutywe ne-silica fume 25kg/m3, i-HPMC idosi efanelekileyo yi-0.6% yedosi yesamente, umlinganiselo wesamente wamanzi ngu-0.42, umlinganiselo wesanti yi-40%, i-naphthalene ephezulu yokunciphisa amanzi isivuno se-agent yi-8%. idosi yesamente, umfuziselo wekhonkrithi emoyeni 28d, amandla avareji yi 42.6MPa, Amandla avareji amanzi agalelwe ikhonkrithi kunye ukuphakama ehlayo 60mm emanzini yi 36.4mpa iintsuku ezingama-28, kunye nomlinganiselo amandla ikhonkrithi eyenziwe ngo. amanzi kunye nekhonkrithi eyenziwe emoyeni yi-84.8%, ebonisa umphumo obalulekileyo.

1. Ukongezwa kwe-HPMC kunempembelelo ecacileyo yokunciphisa umxube wodaka.Ngokunyuka kwedosi ye-HPMC, ixesha lokumisela lodaka londiswa ngokulandelelanayo.Phantsi kwemeko efanayo yedosi ye-HPMC, ixesha lokumisela lodaka lwangaphantsi kwamanzi lide kunelo lomoya.Olu phawu luluncedo ekumpompeni ikhonkrithi ephantsi kwamanzi.

2, exutywe ne-hydroxypropyl methyl cellulose yodaka lwesamente entsha inobumbano oluhle, phantse akukho nto yokopha.

3, idosi ye-HPMC kunye nesidingo samanzi sodaka kuqala sehla kwaye sanyuka kakhulu.

4. Ukufakwa komnciphisi wamanzi kuphucula ingxaki yokunyusa imfuno yamanzi kwi-mortar, kodwa kufuneka ilawulwe ngokufanelekileyo, kungenjalo ngamanye amaxesha kuya kunciphisa ukunyanzeliswa kokusasazwa kwamanzi kwi-samente entsha yodaka.

5. Kukho umahluko omncinane kulwakhiwo phakathi kwe-HPMC exutyiweyo yesamente eludaka iisampulu kunye nesampulu engenanto, kwaye kukho umahluko omncinci kulwakhiwo kunye nokudibana phakathi kwesampulu zesamente ezigalelwe kunye nomoya othululwayo wesamente enodaka.Umzekelo wokubumba ongaphantsi kwamanzi we-28d ukhululekile kancinci.Esona sizathu siphambili kukuba ukongezwa kwe-HPMC kunciphisa kakhulu ilahleko kunye nokusasazwa kwesamente ngexesha lokugalelwa kwamanzi, kodwa kunciphisa iqondo lokuxinana kwesamente.Kwiprojekthi, phantsi komqathango wokuqinisekisa ukuba isiphumo esingaphantsi kwamanzi si-non-dispersion, isixa sokuxuba se-HPMC siyancitshiswa kangangoko kunokwenzeka.

I-6, yongeza i-HPMC ephantsi kwamanzi ayisasazi i-concrete admixture, ukulawula inani lamandla alungileyo, iprojekthi yokulinga ibonisa ukuba umlinganiselo wamandla wokwenza ikhonkrithi emanzini kunye nokwenza emoyeni yi-84,8%, umphumo ubaluleke kakhulu.


Ixesha lokuposa: Sep-17-2022