Lisebelisoa tsa ho Fokotsa Metsi ka Konkreite: Thuto e Felletseng

Kakaretso

Lisebelisoa tsa ho Fokotsa Metsi(WRA) di bapala karolo ya bohlokwa theknolojing ya sejwalejwale ya konkreite, e leng se dumellang ho ntlafala ha bokgoni ba ho sebetsa, matla le ho tshwarella ha nako e ntse e le teng ho boloka tekanyo e tlase ya metsi ho ya ho samente. Pampiri ena e hlahloba mefuta, mekgwa, melemo le diphephetso tsa di-WRA, ditlamorao tsa tsona thepeng ya konkreite, le mekgwa ya tsona ya kaho e tswelang pele nakong e tlang.

1. Selelekela

1.1 Tlhaloso ea Lisebelisoa tsa ho Fokotsa Metsi

Disebediswa tsa ho Fokotsa Metsi (WRAs) ke dikhemikhale tse kopanyang metsi tse fokotsang bongata ba metsi a hlokahalang ho fihlella bokgoni bo itseng ba ho sebetsa ka konkreite. Ka ho ntlafatsa ho hasana ha samente le ho fokotsa kgatello ya bokahodimo, di-WRA di eketsa matla, ho tshwarella le bokgoni ba ho beha.

1.2 Bohlokoa ba Li-WRA Theknolojing ea Konkreite

Konkreite ke thepa ea kaho e sebelisoang haholo, 'me ho ntlafatsa thepa ea eona ho bohlokoa bakeng sa ho boloka litšenyehelo hantle, ho tšoarella le ts'ebetso ea nako e telele. Li-WRA li lumella konkreite ho fihlela bokhoni bo lakatsehang ba ho sebetsa ntle le ho eketsa metsi, ka hona ho thibela phokotso ea matla le mathata a amanang le ho fokotseha.

1.3 Nts'etsopele ea Nalane

Tšebeliso ea li-WRA e qalile mathoasong a lekholo la bo20 la lilemo ka ho hlahisoa ha lignosulfonate. Ho theosa le mashome a lilemo, tsoelo-pele e lebisitse nts'etsopele ea li-reducer tsa metsi tse phahameng (li-superplasticizers) tse ileng tsa fetola theknoloji ea konkreite.

1.4 Lipakane tsa Thuto

• Ho arola le ho hlalosa li-WRA tse fapaneng ka lihlopha.

• Ho hlalosa mekhoa ea bona ea ho sebetsa.

• Ho totobatsa melemo le liphephetso tse amanang le li-WRA.

• Ho sekaseka tšusumetso ea bona ts'ebetsong e tiileng.

• Ho hlahloba mekhoa ea nakong e tlang theknolojing ea WRA.

2. Mefuta ea Lisebelisoa tsa ho Fokotsa Metsi

Li-WRA li arotsoe ka lihlopha ho latela katleho ea tsona le sebopeho sa tsona sa lik'hemik'hale.

2.1 Lisebelisoa tse Tloaelehileng tsa ho Fokotsa Metsi (Li-plasticizer)

Tsena di fokotsa metsi ka 5–10% mme di ntlafatsa bokgoni ba ho sebetsa. Di sebediswa hangata kahong e akaretsang.
Mehlala: Lignosulfonate, li-hydroxycarboxylic acid.

2.2 Lisebelisoa tsa ho Fokotsa Metsi a Maholo (Superplasticizers)

Tsena di ka fokotsa metsi ka ho fihla ho 40%, e leng se dumellang konkreite e matla le e ikgomaretsang.
Mehlala: Li-ether tsa Polycarboxylate (PCE), sulfonated melamine formaldehyde, sulfonated naphthalene formaldehyde.

2.3 Metsi a Fokotsang Tshebetso e Phahameng ka ho Fetisisa

Li-WRA tsena tse tsoetseng pele li etselitsoe lits'ebetso tse ikhethileng tse kang konkreite e sebetsang haholo (UHPC) le konkreite e hatisitsoeng ka 3D.

3. Mokhoa oa Ketso

Li-WRA li sebetsa ka mekhoa e fapaneng ho ntlafatsa phallo le ho nosetsa samente.

3.1 Mokhoa oa ho Hasana

Dikaroloana tsa samente ka tlhaho di hohela dimolek'hule tsa metsi mme di kopana mmoho. Di-WRA di hasanya dikarolwana tsena, di dumella ho metsa metsi hantle ha samente le ho fokotsa tlhokeho ya metsi.

3.2 Ho Leleka Tefiso ea Bokaholimo

Bongata ba li-WRA li hlahisa litefiso tse mpe holim'a likaroloana tsa samente, li baka ho teneha le ho thibela ho kopana ha tsona, ka hona li ntlafatsa bokhoni ba ho sebetsa.

3.3 Phello ea Thibelo ea Steric

Li-superplasticizer, haholo-holo tse thehiloeng ho PCE, li etsa lera le sireletsang ho potoloha likaroloana tsa samente, li li thibela ho atamela haholo le ho boloka mokelikeli nako e telele.

3.4 Ntlafatso ea Metsi

Ka ho fokotsa tlhokeho ea metsi, li-WRA li khothalletsa ts'ebetso e sebetsang hantle ea ho nosetsa, e leng se lebisang ho matrix ea konkreite e teteaneng le e matla.

4. Melemo le Ts'ebeliso ea Li-WRA

4.1 Bokhoni bo Ntlafetseng ba ho Sebetsa

Li-WRA li lumella ho beoa habonolo, li fokotsa litlhoko tsa basebetsi le matla.

4.2 Matla a Ntlafalitsoeng

Karolelano e tlase ea metsi le samente e fella ka matla a ho hatella le a ho thapolla.

4.3 Phokotso ea ho Fokotseha le ho Petsoha

Metsi a mangata ka har'a konkreite a lebisa ho honyeleng ho bakoang ke mouoane, e leng seo li-WRA li thusang ho se fokotsa.

4.4 Ho Tšoarella ho Eketsehileng

Ka ho fokotsa ho kenella ha metsi, li-WRA li ntlafatsa ho hanyetsa lipotoloho tsa ho qhibilihisa le ho hatsela, litlhaselo tsa lik'hemik'hale le ho pepesehela sulfate.

4.5 Litšebeliso Mefuta e Fapaneng ea Konkreite

• Konkreite e Lokisitsoeng ho Kopanya: E ntlafatsa bokgoni ba ho tsamaisa le ho beha thepa.

• Konkreite e entsoeng esale pele: E ntlafatsa ho tlatswa ha hlobo le ho eketsa matla.

• Konkreite e Ikopanyang (SCC): E nolofalletsa phallo ntle le karohano.

• Konkreite e nang le Tshebetso e Phahameng (HPC): E ntlafatsa ho tšoarella le bokgoni ba ho jara mojaro.

5. Tšusumetso Matlong a Konkreite

5.1 Matlo a Konkreite a Macha

5.1.1 Bokgoni ba ho Sebetsa le ho Fokotseha

Tšusumetso e ka sehloohong ea li-WRA e holim'a boleng ba ho putlama, e leng se lekanyang ho phalla ha konkreite.

5.1.2 Bokahare ba Moya

Li-WRA li ka susumetsa moea o kenelletseng, li hloka taolo e nepahetseng ea tekanyo ho qoba phokotso ea matla.

5.1.3 Nako ea ho Beha

Li-superplasticizer li ka liehisa nako ea ho beha, e leng se molemo maemong a leholimo a chesang empa se hloka tlhokomelo ho qoba ho lieha ho feteletseng.

5.2 Matlotlo a Konkreite a Tiileng

5.2.1 Ntlafatso ea Matla

Karolelano e tlase ea metsi le samente e fella ka matla a phahameng a pele le a nako e telele.

5.2.2 Lintlafatso tsa ho Tšoarella

Ho fokotseha ha ho kenella ha metsi ho ntlafatsa ho hanyetsa ho kena ha metsi le ho kenella ha chloride.

5.2.3 Ho fokotseha le ho thekesela

Li-WRA li thusa ho laola ho fokotseha ha metsi ka ho fokotsa tahlehelo ea metsi e sa hlokahaleng.

6. Ho lumellana le Metswako e Meng

6.1 Tšebelisano le Baretarders le ba Accelerators

Li-WRA li ka kopanngoa le li-retarder bakeng sa ho sebetsa halelele kapa le li-accelerator bakeng sa ho beha kapele.

6.2 Tšusumetso ho Lisebelisoa tsa ho Koenya Moea

Li-WRA tse feteletseng li ka fokotsa moea, tsa ama ho hanyetsa ho hatsela le ho qhibiliha ha moea.

6.3 Ho tsamaellana le Lisebelisoa tse Eketsehileng tsa Samente (SCMs)

Li-WRA li ntlafatsa ho hasana ha molora o fofang, mosi oa silika, le konkreite e entsoeng ka slag.

7. Mehopolo ea Tikoloho le Moruo

7.1 Lintlha tsa Botsitso

• Li-WRA li kenya letsoho kahong e tala ka ho fokotsa tšebeliso ea samente.

• Tšebeliso e tlase ea metsi e khothalletsa boiteko ba paballo.

7.2 Ho Sebetsa ka Botlalo Litšenyehelo

Leha di-WRA di eketsa ditjeo tsa thepa, di fokotsa ditshenyehelo tsa basebetsi, tlhokomelo le tokiso.

7.3 Phokotso ea Karolo ea Khabone

Sekhahla se tlase sa samente se bolela ho fokotseha ha mesi e tswang CO₂.

8. Lithuto tsa Nyeoe le Litšebeliso tse Sebetsang

8.1 Meaho e Meholo e Meholo

Li-WRA li ntlafatsa ho pompa le matla bakeng sa meaho e otlolohileng.

8.2 Merero ea Meralo ea Motheo

Ho tšoarella ho ntlafetseng ho tsoela marokho, lithanele le litsela tse kholo molemo.

Khatiso ea Konkreite ea 3D ea 8.3

Li-WRA tsa moloko o mocha li nolofalletsa taolo e nepahetseng holim'a ho hatisoa le ho beoa ha tsona.

9. Liphephetso le Lintlafatso tsa Nakong e Tlang

9.1 Meeli ea Li-WRA tsa Hona Joale

• Ho sebelisa tekanyo e feteletseng ho ka baka karohano.

• Li-WRA tse ling li sebelisana ka tsela e sa lebelloang le mefuta e itseng ea samente.

9.2 Tsoelo-pele ho Li-WRA tse Thehiloeng ho Polymer

Li-WRA tse thehiloeng ho PCE li fana ka ts'ebetso e ntle ka litla-morao tse fokolang.

9.3 Mekhoa ea Nakong e Tlang ea Theknoloji ea ho Kopanya Konkreite

• Ntlafatso ea li-WRA tse thehiloeng linthong tsa tlhaho.

• Metswako e bohlale e nang le ditokiso tsa thepa tsa nako ya sebele.

Lisebelisoa tsa ho Fokotsa Metsie bapala karolo ea bohlokoa haholo theknolojing ea sejoale-joale ea konkreite, e fanang ka matla a ntlafetseng, ho tšoarella le botsitso. Lipatlisiso tsa nakong e tlang li lokela ho shebana le li-WRA tse mosa tikolohong le ntlafatso ea ts'ebetso bakeng sa litsamaiso tse fapaneng tsa samente.