Umthamo kunye nokusetyenziswa kwamanzi kwepolycarboxylate superplasticizer:

Polycarboxylate superplasticizerineempawu zedosi ephantsi kunye nokunciphisa amanzi aphezulu. Xa i-dosage yi-0.15-0.3%, izinga lokunciphisa amanzi lingafikelela kwi-18-40%. Nangona kunjalo, xa i-water-to-binder ratio incinci (ngaphantsi kwe-0.4), i-dosage iyancipha ngakumbi xa umlinganiselo wokubopha amanzi uphezulu. Umlinganiselo wokunciphisa amanzi wei-polycarboxylate superplasticizeriyahluka ngobungakanani bemathiriyeli yesamente. Ngaphantsi kweemeko ezifanayo, izinga lokunciphisa amanzi kwixabiso le-cementitious material engaphantsi kwe-3 lingaphantsi kwe-400kg / m3, kwaye lo mahluko uhoywa ngokulula. Nangona kunjalo, kwinkqubo yokusetyenziswa, kuya kufunyanwa ukuba le ndlela yemveli yobugcisa ayifanelekangaPolycarboxylate superplasticizer, ikakhulu ngenxa yokubaPolycarboxylate superplasticizerzinochuku ngakumbi ekusetyenzisweni kwamanzi kuneeplastiki ezinkulu zemveli. Xa ukusetyenziswa kwamanzi kuncitshisiwe, ukusebenza okulindelekileyo kwekhonkrithi akukwazi ukufezekiswa; xa ukusetyenziswa kwamanzi kuphezulu, nangona i-slump iba nkulu, kuya kubakho ukopha okukhulu kunye nokuhlukana okuncinci, okunempembelelo embi ekusebenzeni ngokubanzi kwekhonkrithi. Oku kuya kubangela ukuphazamiseka okuninzi kulwakhiwo lwesiza. Ubushushu bunempembelelo enkulu kubungakanani bei-polycarboxylate superplasticizer. Ngokwesiqhelo, kufumaniseka ukuba umxube osetyenziswayo kwimveliso eqhelekileyo emini uphantsi ebusuku (iqondo lobushushu lingaphantsi kwe-15 ℃), kwaye i-slump ivame ukuvela "Buyela kukhulu", nokuba ukopha kunye nokwahlula.

Ikhonkrithi ikhetha kakhulu malunga nendawo yokugcwalisa kunye nokusetyenziswa kwamanzi kwi-arhente yokunciphisa amanzi. Emva kokuba isixa esingaphezulu sigqithisiwe, ikhonkrithi iya kubonakala izinto ezingathandekiyo ezifana nokwahlula, ukopha, ukugijima kwe-slurry, ukuqina kunye nomxholo ophezulu womoya.

(1) Uvavanyo lokuxutywa kwesilingo kufuneka luqhutywe kwakhona kunye nezinto ezitshintshiweyo zokutshintsha ukulungelelanisa idosi ukufezekisa umphumo ongcono;

(2) Umthamo wei-polycarboxylate superplasticizerkunye nokusetyenziswa kwamanzi kwekhonkrithi kufuneka kulawulwe ngokungqongqo ngexesha lokusetyenziswa;

(3) Kuvavanyo lwekhonkrithi ye-arhente yokunciphisa amanzi kwizinto eziluhlaza, zama ukulungelelanisa i-arhente yokunciphisa amanzi kuhlobo "oluvila" ukufezekisa injongo yokungabi naluvelwano kwizinto eziluhlaza kunye nokusetyenziswa kwamanzi.