Kuchepetsa madzi admixtures (WRA) ndi superplasticizers ndi mankhwala admixtures ntchito zosakaniza konkire kusintha ntchito yake ndi kuchepetsa okhutira madzi popanda kukhudza mphamvu ya chomaliza mankhwala.M'mafotokozedwe atsatanetsatane awa, tiwona mozama kusiyana pakati pa mitundu iwiri ya zowonjezerazi, ndikuwunika zosakaniza zake, njira zogwirira ntchito, zopindulitsa, ndi momwe zimagwiritsidwira ntchito pantchito yomanga.
A.1.Njira yochepetsera madzi (WRA):
Kusakaniza kochepetsera madzi, komwe kumadziwikanso kuti plasticizer kapena madzi-kuchepetsa admixture, ndi mankhwala osakaniza opangidwa kuti achepetse kuchuluka kwa madzi ofunikira mu konkire osakaniza popanda kusokoneza katundu wake.Othandizirawa makamaka amachita ngati dispersants, facilitates kubalalika kwa simenti particles ndi kulimbikitsa bwino hydration.Cholinga chachikulu cha WRA ndikuwongolera magwiridwe antchito a konkriti pochepetsa kuchuluka kwa simenti yamadzi, zomwe zingayambitse zabwino zosiyanasiyana pakumanga.
2. Ntchito:
Ma WRA nthawi zambiri amakhala organic mankhwala monga lignosulfonates, sulfonated melamine formaldehyde (SMF), sulfonated naphthalene formaldehyde (SNF), ndi polycarboxylate ethers (PCE).
Lignosulfonates amachokera ku zamkati zamatabwa ndipo ndi amodzi mwa mitundu yoyambirira yochepetsera madzi.
SMF ndi SNF ndi ma polima opangidwa omwe amagwiritsidwa ntchito kwambiri m'makampani.
PCE ndi WRA yamakono yomwe imadziwika chifukwa chakuchita bwino komanso kusinthasintha.
3. Njira yochitira:
Njirayi imaphatikizapo kutsekemera kwa madzi ochepetsera madzi pamwamba pa tinthu tating'ono ta simenti, zomwe zimapangitsa kuti tizidutswa tating'ono timene tibalalike.
Kubalalitsidwa kumachepetsa mphamvu interparticle, chifukwa mu bwino fluidity ndi workability wa konkire osakaniza.
4. Ubwino:
Imawongolera magwiridwe antchito: WRA imathandizira kuyenda komanso kutulutsa konkriti, kupangitsa kuti ikhale yosavuta kuyiyika ndikumaliza.
Imachepetsa Chinyezi: Pochepetsa kuchuluka kwa simenti yamadzi, WRA imathandizira kukulitsa mphamvu ndi kulimba kwa konkriti yowuma.
Kugwirizana Kwabwino: Zotsatira zobalalitsa za WRA zimathandizira kusakanikirana kwa chisakanizo, potero kumathandizira kugwirizanitsa ndikuchepetsa kugawanika.
5. Ntchito:
WRA ikhoza kugwiritsidwa ntchito pomanga konkire osiyanasiyana kuphatikiza nyumba zogona, zamalonda ndi zomangamanga.
Zimakhala zothandiza makamaka pamene ntchito yochuluka ndi kuchepa kwa chinyezi ndizofunikira kwambiri.
B.1.Njira yochepetsera madzi kwambiri:
Ma superplasticizers, omwe nthawi zambiri amatchedwa superplasticizers, amaimira gulu lapamwamba kwambiri komanso logwira mtima kwambiri m'gulu lalikulu la superplasticizers.Zowonjezera izi zimapereka mphamvu zochepetsera madzi pamene mukusunga kapena kukulitsa zinthu zina zofunika za konkriti.
2. Ntchito:
Zida zochepetsera madzi zamphamvu kwambiri zimaphatikizapo ma polycarboxylate ethers (PCE) ndi ma polynaphthalene sulfonates osinthidwa.
PCE imadziwika ndi kapangidwe kake ka maselo komwe kamalola kuwongolera bwino kwa kubalalitsidwa ndi kuchepetsa madzi.
3. Njira yochitira:
Mofanana ndi ma superplasticizer achikhalidwe, ma superplasticizer amagwira ntchito potsatsa pa tinthu tating'ono ta simenti ndikupangitsa kubalalitsidwa.
Mapangidwe a ma cell a PCE amalola kuwongolera kwakukulu ndi kusinthasintha pakukwaniritsa zomwe mukufuna kuchita.
4. Ubwino:
Kuchepetsa Kwamadzi Kwapamwamba: Ma WRA ochita bwino amatha kuchepetsa kwambiri madzi, nthawi zambiri kuposa mphamvu za WRA wamba.
Kuthekera kokwanira: Othandizirawa ali ndi mawonekedwe abwino kwambiri oyenda ndipo ndi oyenera kugwiritsidwa ntchito podzipangira konkriti ndi ntchito zina zomwe zimafuna kutheka kwambiri.
Kusungidwa bwino kwa kugwa: Ma WRA ena ochita bwino kwambiri amatha kukulitsa kusungika, potero kukulitsa nthawi yogwira ntchito popanda kusokoneza konkriti.
5. Ntchito:
Ma superplasticizers amatha kugwiritsidwa ntchito m'njira zosiyanasiyana, kuphatikiza konkire yamphamvu kwambiri, konkriti yodzipangira yokha, ndi mapulojekiti okhala ndi zofunikira zolimba.
C. Kusiyana kwakukulu:
1. Kuchita bwino:
Kusiyana kwakukulu ndiko kuchepetsa madzi bwino.Zowongolera bwino kwambiri zamadzi zimatha kuchepetsa kuchuluka kwa madzi kuposa momwe zimakhalira zopangira madzi.
2. Mapangidwe a mamolekyu:
Ma WRA apamwamba kwambiri, makamaka ma PCE, ali ndi mapangidwe ovuta kwambiri a ma molekyulu omwe amalola kuwongolera bwino kwa zotsatira zobalalika.
3. Kugwira ntchito ndi kusungika kwa kugwa:
WRA yochita bwino kwambiri nthawi zambiri imakhala ndi kuthekera kogwira ntchito bwino komanso kusungika kocheperako, zomwe zimawapangitsa kukhala oyenera kugwiritsa ntchito konkriti kosiyanasiyana.
4. Mtengo:
WRA yochita bwino kwambiri ingakhale yodula kuposa WRA yachikhalidwe, koma magwiridwe ake apamwamba amavomereza kugwiritsidwa ntchito kwake pama projekiti ena omwe amafunikira ntchito zapamwamba.
Zosakaniza zochepetsera madzi ndi zopangira ma superplasticizer zimathandizira kwambiri kukhathamiritsa konkriti.Ngakhale ma WRA ochiritsira akhala akugwiritsidwa ntchito bwino kwa zaka zambiri, ma WRA ogwira ntchito kwambiri, makamaka ma PCE, amaimira yankho lapamwamba kwambiri lomwe limapereka mphamvu zochepetsera madzi komanso machitidwe opititsa patsogolo ntchito.Chisankho pakati pa ziwirizi chimadalira zofunikira zenizeni za ntchito yomanga ndi ndalama zomwe zimafunikira pakati pa mtengo ndi ntchito.
Nthawi yotumiza: Jan-25-2024