Ukhonkolo uyinto eyinhloko esungulwe ngabantu. Ukuvela kukakhonkolo sekuqale uguquko emlandweni wezakhiwo zabantu. Ukusetshenziswa kwezixube zikakhonkolo kuyintuthuko enkulu ekukhiqizeni ukhonkolo.Ukuvela kokuxutshwa kukakhonkolo okugxilile.
izitshalo zenze ukukhiqizwa kwempahla yokwakha kuqhubekele phambili emgwaqeni wokusungulwa kwezimboni nokongiwa kwemvelo. Lokhu futhi kubeka phambili izidingo ezengeziwe ekulawuleni ikhwalithi yokukhiqiza okukhonkolo, okuholela ekuthuthukisweni okuphelele kwekhwalithi ephathekayo eminyakeni yamuva. Ngesikhathi esifanayo, ngenxa yezinga eliphansi lobuchwepheshe bokulawula ikhwalithi kwezinye izitshalo ezilungele ukuxuba ukhonkolo, ilethe izingozi ezifihliwe kukhwalithi yephrojekthi, yaze yavela. Ingozi yekhwalithi yobunjiniyela engakaze yenzeke eminyakeni engaphezu kwengu-20 idale ukulahlekelwa okukhulu kwezomnotho.
Izinto eziyinhloko ezibangela ukungezwani phakathi kwezixube nosimende:
Ukusebenza kokhonkolo akuxhomekile kuphela emsebenzini wezinto ezikhona, kodwa futhi nokuguquguquka phakathi kwezinto kanye nesilinganiso sokuxuba ukhonkolo. I-Admixtures (izinciphisi zamanzi) azihambisani nosimende, okungukuthi, izixube azikuthuthukisi kakhulu ukusebenza kukasimende, ukulahlekelwa kwe-slump kakhonkolo kukhulu kakhulu noma ukhonkolo ubeka ngokushesha kakhulu, futhi ngisho nokuqhekeka kungenzeka. emalungwini esakhiwo esiphathekayo.
Njengengxenye yesihlanu kakhonkolo, i-admixture ilandisa ngengxenye encane, kodwa inethonya elikhulu ekusebenzeni kukakhonkolo, okungathuthukisa kakhulu ukuwohloka kokhonkolo futhi kulungise isikhathi sokuhlanganisa, ngaleyo ndlela kuthuthukise ukusebenza kokwakhiwa kokhonkolo noma izindleko zokulondoloza. . Ukusabela kwe-hydration kasimende kudinga angaphansi kuka-25% wamanzi wesisindo sikasimende, kodwa lapho usimende uhlangana namanzi, uzokwakha isakhiwo se-flocculation ukugoqa amanzi kuwo. Ukwengezwa kwe-admixture kungaba i-adsorption yokuqondisa ebusweni bezinhlayiya ze-cement, ukuze ubuso bezinhlayiya ze-cement bube necala elifanayo, elihlukaniswa ngenxa yomphumela wokuxosha, ngaleyo ndlela likhulule amanzi ahlanganiswe nesakhiwo se-cement flocculation, ukuthi amanzi amaningi angabandakanyeka ekuphenduleni kwe-hydration. , thuthukisa umsebenzi. Ubukhulu be-adsorption yezinhlayiya ze-cement ku-admixture kanye nokulahlekelwa umphumela we-admixture kubonisa ukuguquguquka kwe-admixture ku-samente.
Inkinga yokungahambisani phakathi kwezixube kanye nosimende kuyinkinga ekhathazayo kanye nekhanda labo bonke abakhiqizi bekhonkrithi bezentengiselwano. Ngemuva kokuthi inkinga yenzekile, ekugcineni kusolwa i-admixture. Ukungahambisani phakathi kwe-admixture kanye ne-cement kubangelwa i-admixture ngokwayo. Izici zekhwalithi nokwakheka kwamakhemikhali, kodwa isizathu esiyinhloko sivame ukuhlotshaniswa nezici ezifana nosimende nezingxube, noma ngabe i-ejenti evamile yokunciphisa amanzi, i-superplasticizer esekwe inayiloni noma i-polycarboxylic acid-based superplasticizer yesizukulwane sesithathu izovela.
Isikhathi sokuthumela: Jul-19-2022
