Ukuxhathisa ukusabalalisa sisalathiso esibalulekileyo sobugcisa ukulinganisa umgangatho we-anti - dispersant.I-Hydroxypropyl methyl celluloseyikhompawundi yepolymer enyibilikayo emanzini, ekwabizwa ngokuba yintlaka 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, umthamo wesamente yi-400kg, umsi oxutyiweyo wesilica oyi-25kg/m3,HPMCIdosi 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% yedosi yesamente, i-sample yekhonkrithi emoyeni 28d, amandla aphakathi yi-42.6MPa, amandla avareji ngaphantsi kwamanzi wagalela ikhonkrithi kunye ukuphakama ukuwa 60mm emanzini I-36.4mpa yeentsuku ze-28, kunye nomlinganiselo wamandla wekhonkrithi eyenziwe emanzini 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.
6, yongezaHPMCamanzi angaphantsi kwamanzi awazichithachithi 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: Apr-25-2024