Superplasticizer(I)

Umhla wokuThumela: 9, Meyi, 2022

(一) Ukuziqhelanisa nei-polycarboxylate superplasticizer kunye nemathiriyeli yesamente:

Enyanisweni, kuye kwafunyaniswa ukubaPolycarboxylate Superplasticizerbaneengxaki ezicacileyo zokuziqhelanisa neesamente ezahlukeneyo kunye neentlobo ezahlukeneyo zemixube yeeminerali, kwaye ngamanye amaxesha zikhetha kakhulu. Ukulungelelanisa phakathi kwesamente kunyei-polycarboxylate superplasticizer iya kuchatshazelwa zizinto ezininzi. Okufana nalokhu: amacandelo esamente, indawo ethile yomphezulu, umxholo wealkali, umxholo wegypsum kunye neentlobo ngeentlobo zonke zinempembelelo ekuziqhelaniseniPolycarboxylate Superplasticizer.

Indawo yokugcwalisa yePolycarboxylate Superplasticizerngenxa yeesamente ezahlukeneyo zihluke, izinga lokunciphisa amanzi liyancitshiswa, ilahleko ye-slump yekhonkrithi iyanda, into eyenziwa "i-residue yebhontshisi yebhontshisi" ibonakala xa ikhonkrithi ingenayo i-slurry, kunye neengxaki zokuphuma kwegazi, i-sedimentation kunye nokwahlula, kunye nobunzima bokupompa. , Ukuvakalelwa kwi-dosage, ikhonkrithi ayikwazi ukuvulwa okanye ikhutshwe ngokugqithiseleyo. Umzekelo, umxholo wei-polycarboxylate superplasticizer kuba isamente yi-1.8% (umxholo oqinileyo we-10%) ukuze ufumane imeko eyanelisayo, ngelixa isamente iB idinga ukuxutywa ne-2.2% ukufumana imeko engcono, kwaye ngamanye amaxesha xa idlula i-2.2% yedosi, umxube wekhonkrithi. uqhelene nokopha.

Okwangoku, ngokwemiqathango yokuguquguquka kwePolycarboxylate Superplasticizer, izisombululo zezi zilandelayo:

(1) Kwisiseko sokuqinisekisa ukomelela kwekhonkrithi, ngokulungelelanisa umlinganiselo wesanti, ubungakanani bomlinganiselo we-aggregate erhabaxa, kunye nokwandisa ubuninzi benkqubo yekhonkrithi eludaka;

(2) Utywala lukamama ludityaniswe ne-ether lipids kwaye idosi yonyuswa ngokufanelekileyo. Ngokuqhelekileyo, kucetyiswa ukuba i-ethers kunye ne-lipids 5: 5 ibe nefuthe elingcono, kwaye i-dosage kufuneka inyuswe nge-0.2%;

(3) Yongeza ngokufanelekileyo okanye utshintshe amacandelo ayo, sebenzisa i-air-entraining agents ezifana ne-SJ, i-Degussa DY, i-foam stabilizer AR, i-K12, ukwandisa umlinganiselo we-slump-retaining agents, sebenzisa i-sodium gluconate, iswekile, i-phosphate, i-ATMP, i-citric acid , isitatshi esilungisiweyo kunye nezinye iiretarders ezidityanisiweyo, kusetyenziswa i-soluble cellulose, i-xanthan gum, i-dextrin, ilungisiwe i-soluble thickener, okanye ukongeza "isulfure" okanye "i-alkali" kwikhonkrithi inokuphuculwa;

(4) Guqula i-molecular structure ye-polycarboxylic acid, kwaye ulungelelanise amanye amacandelo kwinkqubo yokudibanisa ukulungelelanisa ukulungelelaniswa kwayo.

Kwii-admixtures, impembelelo ye-fly ash ngokucacileyo inkulu kunomgubo we-slag. Ngokuqhelekileyo, i-fly ash yodidi lokuqala ikwazi ukuguquguquka, ngelixa i-fly ash yebanga lesibini neyesithathu ithanda ukungahambelani, ngakumbi uthuthu lwempukane yebakala lesithathu. Xa umgangatho wothuthu uhlwempuzekile, umphumo wokunyusa umthamo wei-polycarboxylate superplasticizerekuhambeni kwexesha nangoku ayinakuphuculwa kakhulu. Isizathu esona sizathu salo mcimbi kukuba umxholo wekhabhoni we-ash yesibini kunye ne-tertiary fly ash kunye nelahleko ephezulu yokutshisa ikhulu, kwaye umthamo we-adsorption we-carbon particles to admixtures mkhulu, ngaloo ndlela unciphisa ukuxutywa kwe-admixtures kwi-samente, echaphazela i-Concrete fluidity. Xa usebenzisa i-grade III fly ash, ukwandisa umxholo we-polycarboxylate water reducer ngaphezu kwe-50%, ukuze ufezekise izinga lokunciphisa amanzi xa udibanisa i-grade one fly ash. Ebusweni banamhlanje umlotha wempukane kunye nomgangatho onzima kunye namacandelo ahlukeneyo, kuyimfuneko ukomeleza umgangatho wokulawula uthuthu lwempukane kunye nokomeleza uvavanyo xa usebenzisa. i-polycarboxylate superplasticizer.