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Chifukwa chiyani polycarboxylate superplasticizer imayambitsa kutuluka kwa magazi konkriti?
Polycarboxylic acid superplasticizer ndi superplasticizer yosungunuka m'madzi yopangidwa makamaka ndi polima wolumikizidwa ndi carboxylate, zomwe zimatha kusintha zinthu zosiyanasiyana za konkriti, onjezerani mphamvu, anti-permeability, anti-carbonation, anti-shrinkage ndi kulimba kwa konkriti. Komabe, chifukwa cha mphamvu ya zinthu zosiyanasiyana, konkire wosakanikirana ndi polycarboxylic acid water reducer nthawi zambiri amaoneka mochedwa, kutuluka magazi ndi zochitika zina, zomwe zidzakhudza kwambiri zomangamanga.
Zifukwa zazikulu ndi izi:
(1) Kugwiritsa ntchito kwambiri polycarboxylic acid water reducer
Polycarboxylic acid yochepetsera madzi imatha kusintha bwino kugwa kwa konkriti, koma kuchuluka kwa kusakaniza ndi kwakukulu kwambiri ndipo mlingo wochepetsera madzi ndi wapamwamba kwambiri (pafupi ndi malire a kusakaniza, madzi kuchepetsa mlingo kuposa 40%). Mphamvu yobalalika imakhala yolimba kwambiri kotero kuti idzachepetsa kwambiri mgwirizano wa konkire ndipo madzi ambiri aulere amamasulidwa, motero kumawonjezera kuthekera kwa magazi konkire. Makamaka pamene anthu ntchito kumasulidwa pang'onopang'ono ndi slump mtundu polycarboxylic acid madzi reducer, kusanganikirana kwambiri ndikosavuta kupangitsa kuti konkriti kukhetse magazi komanso kupangitsa tsankho ngati kuli koopsa. Choncho, musanagwiritse ntchito, m'pofunika kuchita patsogolo mayeso nthawi kuona kusintha konkire boma.
(2) polycarboxylic acid water reducer imakhudzidwa ndi kutentha kwa chilengedwe ndipo imakhala ndi katundu wochepa
Poyerekeza ndi othandizira ena ochepetsa madzi, katundu wa polycarboxylic acid wochepetsera madzi amakhudzidwa kwambiri ndi kutentha. M'chilimwe, pamene kutentha kuli pamwamba, chochepetsera madzi cha polycarboxylic acid chokhala ndi magwiridwe antchito abwino chikuwoneka kuti chikutsika “kuthira zazikulu” chodabwitsa pamene kutentha mwadzidzidzi amachepetsa. Choncho, pamene kutentha kumatsika mwadzidzidzi, choyambirira cha polycarboxylic acid superplasticizer chiyenera kuyesedwa musanagwiritse ntchito. Panthawi yopanga, nthawi yolimbikitsa iyenera kukulitsidwa moyenera kuti ibalalitse kwathunthu ndikumasula polycarboxylic acid superplasticizer., kuti mupewe zotsatira za kumasulidwa pang'onopang'ono mu gawo lotsatira, zomwe zimapangitsa kuti madzi asasungidwe bwino konkriti ndi mvula yamadzi.
(3) Onjezani chotsitsa madzi cha polycarboxylic acid kuti musinthe kutsika
Pamaso konkire kuthira, zikapezeka kuti kugwira ntchito kwa konkire kusakaniza sikukwaniritsa zofunikira zomanga, mphamvu ya konkire nthawi zambiri imasinthidwa powonjezerapo polycarboxylic acid superplasticizer ku chosakanizira cha konkire. Komabe, pamene kuwonjezera kwachiwiri kusinthidwa, nthawi zina n'zosatheka kumvetsa bwino kuchuluka kwa ntchito. Pamene kuchuluka kwa superplasticizer kumaposa theoretical amafuna, superplasticizer yochulukirapo imagwirabe ntchito pambuyo pa kuthira konkire, kupanga pakati pa konkire kusanthula kugawa madzi. Choncho, mukamagwiritsa ntchito superplasticizer kuti musinthe magwiridwe antchito a konkriti, konkire iyenera kuwonjezeredwa nthawi zosiyanasiyana malinga ndi kuchuluka kwa konkire, ndi kusanganikirana kuyenera kulimbikitsidwa kuti zitsimikizire ngakhale kusakaniza ndi kuwongolera kuwonjezera kuchuluka.
(4) Pamene polycarboxylic acid superplasticizer anali owonjezera, retarder sanagwiritsidwe bwino
Kuti mupeze ntchito yabwino yoteteza kugwa kwa konkriti, kuchuluka kwa zigawo zochepetsera nthawi zambiri zimawonjezeredwa pamene wothandizira kuchepetsa madzi akusakanikirana. Pamene kuchuluka kwa retarding chigawo chachikulu kwambiri, kapena pamene kutentha kuli bwino koma pawiri polycarboxylic asidi superplasticizer amakumana mwadzidzidzi kutentha kuchepa, Kuchedwetsa kwambiri chigawo chimodzi kumachepetsa kuthamanga kwa simenti ndikupangitsa kutuluka kwa konkriti. Choncho muyenera kulabadira chikoka cha zigawo za retarded konkire secrete madzi. Makamaka kutentha kusiyana pakati usana ndi usiku mu kasupe ndi yophukira nyengo, muyenera kusamala kwambiri kuchuluka kwa retarder, kotero kuti mukukonzekera konkriti, mukhoza kuteteza madzi kuyandama pang'onopang'ono, aggregate kumira, kupanga konkriti lag magazi.
(5) kuyanjana pakati pa simenti ndi polycarboxylic acid water reducer
Mapangidwe a konkire ndi ovuta ndipo n'zosavuta kupanga kusintha kwa mankhwala osagwirizana pakati pa zigawozo. Ngati ngakhale simenti ndi polycarboxylic asidi superplasticizer ndi osauka, Zomwe zili mu superplasticizer zidzawonjezeka, ndipo superplasticizer yowonjezera idzatalikitsa nthawi yoyambira konkire, ndi kupanga madzi aulere mu konkire alekanitse. Kuphatikiza apo, pamene alkali wosungunuka mu simenti ndi wotsika, kuchuluka kwa hydration kwa simenti kumakhala pang'onopang'ono, ndipo chodabwitsa cha kutaya magazi nthawi zambiri kumachitika.
Kuphatikiza apo, mu ndondomeko yeniyeni yopangira konkriti, anthu nthawi zambiri amakumana mchenga akaggregate kusinthasintha khalidwe, monga matope ochuluka kapena ochepa, madzi amakhala aakulu kapena ochepa, aggregate gradation, ndi zina. Zonsezi zidzayambitsa magazi a konkriti kapenanso tsankho.
Cie-China.org ndiye wotsogola wotsogola wa konkriti wa thovu yemwe amapereka thovu la konkriti, superplasticizer,thovu konkire mphamvu zowonjezera kwa wopepuka konkire, Zolemba za CLC. Ngati mukuyang'ana superplasticizer, chonde khalani omasuka Lumikizanani nafe.