Letsatsi la poso: 26,Dec, 2022
1. Metsoako ea Konkreite e Fokotsang Metsi
Metsoako e fokotsang metsi ke lihlahisoa tsa lik'hemik'hale tseo ha li eketsoa ka konkreite li ka bakang ho putlama ho lakatsehang ka tekanyo e tlase ea samente ea metsi ho feta kamoo e tloahelehileng kateng. Metsoako e fokotsang metsi e sebelisoa ho fumana matla a khethehileng a konkreite ho sebelisa samente e tlase. Likahare tse tlase tsa samente li fella ka tlhahiso e tlase ea CO2 le tšebeliso ea matla ka bongata ba konkreite e hlahisoang. Ka mofuta ona oa motsoako, thepa ea konkreite e ntlafatsoa mme e thusa ho beha konkreite tlas'a maemo a thata. Lisebelisoa tsa metsi li 'nile tsa sebelisoa haholo-holo ka holim'a marokho a marokho, likonkreite tse holim'a metsi a tlaase, le konkreite e koahelang. Likhatelo-pele tsa morao-rao tsa theknoloji ea admixture li lebisitse ho nts'etsopele ea lisebelisoa tse fokotsang metsi a mahareng.
2. Concrete Admixtures: Superplasticizers
Sepheo se seholo sa ho sebelisa li-superplasticizers ke ho hlahisa konkreite e phallang e nang le sekhahla se phahameng ka har'a lisenthimithara tse supileng ho isa ho tse robong tse lokelang ho sebelisoa meahong e matlafalitsoeng haholo le ho behoa moo ho kopanya ho lekaneng ka ho sisinyeha ho ke keng ha finyelloa habonolo. Kopo e 'ngoe e kholo ke tlhahiso ea konkreite e matla haholo ho w/c's ho tloha ho 0.3 ho isa ho 0.4. Ho fumanoe hore bakeng sa mefuta e mengata ea samente, superplasticizer e ntlafatsa ho sebetsa ha konkreite. Bothata bo bong bo amanang le ho sebelisa mochini o fokotsang metsi a mangata ka konkreite ke tahlehelo ea ho putlama. Konkreite e nang le ts'ebetso e phahameng e nang le superplasticizer e ka etsoa ka khanyetso e phahameng ea leqhoa, empa litaba tsa moea li tlameha ho eketseha ha li bapisoa le konkreite ntle le superplasticizer.
3. Concrete Admixtures: Set-Retarding
Li-admixtures tsa konkreite tse liehang li sebelisoa ho liehisa karabelo ea lik'hemik'hale e etsahalang ha konkreite e qala ts'ebetso ea ho seta. Mefuta ena ea metsoako ea konkreite e atisa ho sebelisoa ho fokotsa phello ea mocheso o phahameng o ka hlahisang boemo bo potlakileng ba konkreite. Li-admixtures tsa "set retading" li sebelisoa kahong ea katiloeng ea konkreite, e lumellang nako e eketsehileng ea ho qeta litselana tsa konkreite, ho fokotsa litšenyehelo tse ling ho beha semela se secha sa konkreite sebakeng sa mosebetsi le ho thusa ho felisa manonyeletso a batang ka konkreite. Li-retarders li ka boela tsa sebelisoa ho hanela ho phunyeha ka lebaka la ho kheloha ha sebopeho se ka hlahang ha li-slabs tse rapameng li behoa likarolong. Li-retarders tse ngata li boetse li sebetsa e le lisebelisoa tse fokotsang metsi 'me li ka kenya moea o itseng ka konkreite
4. Concrete Admixtures: Air-Entraining Agent
Konkreite e kenang moeeng e ka eketsa ho tšoarella ha konkreite ka leqhoa. Mofuta ona oa motsoako o hlahisa konkreite e sebetsang ho feta konkreite e sa kenngoeng ha e ntse e fokotsa ho tsoa mali le ho arohana ha konkreite e ncha. Ntlafatso ea khanyetso ea konkreite ho serame se matla kapa maqhubu a leqhoa. Melemo e meng ea motsoako ona ke:
a. Ho hanyetsa ho hoholo ho potoloha ha metsi le ho omisa
b. Boemo bo phahameng ba ho sebetsa
c. Boemo bo phahameng ba nako e telele
Li-bubble tsa moea tse kentsoeng li sebetsa e le tšireletso ea 'mele khahlanong le ho phatloha ho bakoang ke khatello ea maikutlo ka lebaka la ho eketseha ha metsi a mocheso o batang. Li-admixtures tse monate tsa moea li lumellana le hoo e batlang e le metsoako eohle ea konkreite. Ka tloaelo bakeng sa peresente e 'ngoe le e 'ngoe ea moea o kentsoeng, matla a khatello a tla fokotseha ka liperesente tse hlano.
5. Concrete Admixtures: Ho potlakisa
Li-admixtures tsa konkreite tse fokotsang shrinkage li kenngoa ka konkreite nakong ea ho kopanya ha pele. Mofuta ona oa motsoako o ka fokotsa ho fokotseha ha nako ea pele le nako e telele. Metsoako e fokotsang shrinkage e ka sebelisoa maemong ao ho ona ho phatloha ho ka lebisang mathateng a nako e telele kapa moo manonyeletso a mangata a honyehang a sa rateheng ka mabaka a moruo kapa a tekheniki. Metsoako e fokotsang shrinkage, maemong a mang, e ka fokotsa kholo ea matla lilemong tsa pele le hamorao.
6.Concrete Admixtures: Ho fokotsa ho fokotseha
Li-admixtures tsa konkreite tse fokotsang shrinkage li eketsoa ka konkreite nakong ea ho kopanya ha pele. Mofuta ona oa motsoako o ka fokotsa ho fokotseha ha nako ea pele le nako e telele. Metsoako e fokotsang shrinkage e ka sebelisoa maemong ao ho ona ho phatloha ho ka lebisang mathateng a nako e telele kapa moo manonyeletso a mangata a honyehang a sa rateheng ka mabaka a moruo kapa a tekheniki. Metsoako e fokotsang shrinkage, maemong a mang, e ka fokotsa kholo ea matla lilemong tsa pele le hamorao.
7. Concrete Admixtures: Corrosion-Inhibiting
Li-admixtures tse thibelang kutu li oela sehlopheng sa motsoako o khethehileng 'me li sebelisetsoa ho fokotsa ho bola ha tšepe e matlafatsang ka konkreite. Corrosion inhibitors e ka fokotsa haholo litšenyehelo tsa tlhokomelo ea meaho ea konkreite e matlafalitsoeng bophelong bohle ba ts'ebeletso ea lilemo tse 30 - 40. Metsoako e meng e ikhethang e kenyelletsa metsoako e fokotsang shrinkage le alkali-silica reactivity inhibitors. Metsoako e thibelang kutu e na le phello e fokolang matla lilemong tsa morao-rao empa e ka potlakisa nts'etsopele ea matla a pele. Calcium nitrite based corrosion inhibitors e potlakisa linako tsa ho beha konkreite ka holim'a mefuta e mengata ea mocheso ntle le haeba li entsoe ka "set retarder" ho fokotsa phello e potlakisang.
Nako ea poso: Dec-27-2022
