Umhla wokuPoswa:13, kuCanzibe,2024

Njengoko iqondo lokushisa liqhubeka nokunyuka, intwasahlobo iyeza, kwaye oku kulandelayo yimpembelelo yokutshintsha kweqondo lokushisa kwi-slump yekhonkrithi. Kulo mba, siya kwenza uhlengahlengiso oluhambelanayo xa sisebenzisa ii-arhente zokunciphisa amanzi ukwenzela ukuba Ikhonkrithi ifikelele kwimeko efunwayo.

1. I-Polycarboxylate i-agent yokunciphisa amanzi isenayo ingxaki kunye nokulungelelanisa kwabo kwi-samente. Kwiisamente zomntu ngamnye, izinga lokunciphisa amanzi liya kuba liphantsi kwaye ilahleko ye-slump iya kuba enkulu. Ngoko ke, xa ukulungelelaniswa kwesamente akulungile, umxube wesilingo kunye nokulungiswa kwekhonkrithi kufuneka kwenziwe. idosi ukufezekisa iziphumo ezingcono.

Ukongeza, ukulunga kunye nexesha lokugcinwa kwesamente kuya kuchaphazela ukusebenza kwepolycarboxylate superplasticizer. Ukusetyenziswa kwesamente eshushu kufuneka kugwenywe kwimveliso. Ukuba i-samente eshushu ixutywe kunye ne-agent ye-polycarboxylate yokunciphisa amanzi, i-concrete yokuqala yekhonkrithi iya kuba lula ukuphuma, kodwa i-slump-preserving effect ye-admixture iya kuba buthathaka, kwaye ikhonkrithi ingabonakala. Ilahleko ekhawulezileyo yokuwa.

2. I-Polycarboxylate i-agent yokunciphisa amanzi ivakalelwa ngakumbi kwiinguqu kwizinto eziluhlaza. Xa umgangatho wezinto eziluhlaza ezifana nesanti kunye nezixhobo zamatye kunye ne-admixtures ezifana ne-fly ash kunye ne-mineral powder zitshintsha kakhulu, i-polycarboxylate i-agent yokunciphisa amanzi iya kuxutywa kunye ne-polycarboxylate yokunciphisa amanzi. Ukusebenza kwekhonkrithi kuya kuchaphazeleka kwinqanaba elithile, kwaye uvavanyo lokuxuba ukuvavanya kufuneka luqhutywe kwakhona kunye nezinto ezitshintshiweyo zokutshintsha ukulungelelanisa idosi ukufezekisa umphumo ongcono.

3. I-agent ye-polycarboxylate yokunciphisa amanzi inomdla ngokukodwa kumxholo wodaka we-aggregate. Ubuninzi bodaka olugqithisileyo luya kunciphisa ukusebenza kwe-agent ye-polycarboxylate yokunciphisa amanzi. Ngoko ke, umgangatho wee-aggregates kufuneka ulawulwe ngokungqongqo xa usebenzisa i-polycarboxylate superplasticizers. Xa umxholo wodaka we-aggregate ukhula, i-dosage ye-polycarboxylate yokunciphisa amanzi kufuneka inyuswe.

4. Ngenxa yezinga eliphezulu lokunciphisa amanzi e-polycarboxylate i-agent yokunciphisa amanzi, i-concrete slump ibaluleke kakhulu ekusebenziseni amanzi. Ngoko ke, ukusetyenziswa kwamanzi kwekhonkrithi kufuneka kulawulwe ngokungqongqo ngexesha lokusetyenziswa. Emva kokuba isixa sigqithisiwe, ikhonkrithi iya kubonakala ulwahlulo, ukopha, ukuqina kunye nomxholo ogqithiseleyo womoya kunye nezinye izinto ezimbi.

5. Xa usebenzisa i-polycarboxylate i-admixtures yokunciphisa amanzi, kuyacetyiswa ukuba ukwandise ngokufanelekileyo ixesha lokuxuba (ngokuphindwe kabini ixesha elide njenge-admixtures yendabuko) ngexesha lenkqubo yokuvelisa ikhonkrithi, ukwenzela ukuba amandla okuthintela i-steric ye-polycarboxylate yokunciphisa amanzi admixture ingaba. isetyenziswa ngokulula ngakumbi, elungele Ukulawulwa kokuthotywa kwekhonkrithi kwimveliso. Ukuba ixesha lokuxuba alanelanga, kunokwenzeka kakhulu ukuba i-slump yekhonkrithi ehanjiswa kwindawo yokwakha iya kuba nkulu kunokuba i-slump yekhonkrithi elawulwa kwisikhululo sokuxuba.

6. Ngokufika kwentwasahlobo, umahluko wobushushu phakathi kwemini nobusuku utshintsha kakhulu. Kulawulo lwemveliso, kufuneka sihlale siqwalasela utshintsho kwi-concrete slump kwaye silungelelanise i-dosage ye-admixtures ngexesha elifanelekileyo (ukuphumeza umgaqo wokuxuba okuphantsi kwiqondo lokushisa eliphantsi kunye nokuxuba okuphezulu kwiqondo lokushisa eliphezulu).