7 Superplasticizer Agents a SCC: Kufananiza Kwambiri Kwamutu ndi Mutu

80% za SCC Zolephera Tsatirani Kubwerera ku Chosakaniza Chimodzi

Nachi chiŵerengero chomwe chinatilepheretsa ife kuzizira: A 2023 kafukufuku wa European Ready Mixed Concrete Organization anapeza kuti chatha 80% ya konkire yodziyimitsa yokha yokanidwa kumunda (Chithunzi cha SCC) magulu analephera chifukwa kusagwirizana kapena kulakwika kwa dosing wa superplasticizer wothandizila kudzipangira konkriti SCC. Osati zoipa aggregate. Osati kusakanizidwa bwino. Cocktail ya mankhwala inalakwika.

Takhala mu batching plant ndi pa malo antchito. Timadziwa mantha pamene kutsika kugunda 800 mm koma phala likuyamba kutuluka magazi. Kapena pamene konkire imasiya kuyenda pakati pa L-bokosi. Kusankha chothandizira cha superplasticizer cholakwika chodzipangira konkriti SCC si cholakwika chaching'ono-ndichiwopsezo chamapangidwe komanso kuzama kwachuma..

Nkhaniyi ndi yathu yopanda-fluff, Kuyerekeza kwapamutu kwa mabanja asanu ndi awiri akuluakulu a superplasticizer omwe amagwiritsidwa ntchito ku SCC lero. Tidzakupatsani zabwino, zoipa, ndi yonyansa kotero mutha kusankha chida choyenera chosakaniza chanu.

Chifukwa chiyani SCC Imafunikira Wothandizira Wa Superplasticizer Kuti Azidziphatikiza ndi Concrete SCC

Tisanayerekeze, tiyeni tikhale omveka bwino pa ntchito yomwe mankhwalawa ayenera kuchita. SCC iyenera kuyenda pansi pa kulemera kwake, lembani ngodya iliyonse ya formwork yovuta, ndi kudutsa mipata yolimba ya rebar - zonse popanda kusankhana. Zochepetsera madzi wamba sangathe kuzidula. Chifukwa chake timagwiritsa ntchito zochepetsera madzi othamanga kwambiri (HRW), makamaka superplasticizers.

Wothandizira superplasticizer wa SCC wodzipangira yekha konkriti amagwira ntchito potsatsa tinthu tating'ono ta simenti ndikupanga kukana kwa electrostatic. (mibadwo yakale) kapena steric chotchinga (ma PCE amakono). Izi zimathetsa ma agglomerates, kumasula madzi otsekeredwa ndikuwonjezera madzimadzi popanda kuwonjezera madzi owonjezera. Chotsatira? Konkire yoyenda yomwe imagwirizanitsa.

1. PCE (Polycarboxylate Ether) Superplasticizers

Uwu ndiye mulingo wagolide wa SCC yamakono. Palibe mpikisano. Ma PCE amagwiritsa ntchito chisa chofanana ndi ma polima okhala ndi magulu a carboxylate omangika ku simenti ndi maunyolo autali am'mbali a ether omwe amapanga steric repulsion..

Ubwino

• Kuchepetsa madzi mwapadera: mpaka 40% poyerekeza ndi kusakaniza kopanda pake
• Kusungidwa bwino kwa ntchito: 60-90 mphindi zochepa za moyo wopanda kutaya kwakukulu
• Mlingo wochepa: kawirikawiri 0.2% ku 1.5% ndi kulemera kwa simenti (bwc)
• Zapangidwa ndi SCC: amakwaniritsa slump umayenda wa 650-800 mm mosavuta

kuipa

• Mkulu kudziwa kutentha: Imagwira ntchito bwino pakati pa 15 ° C ndi 30 ° C pamwamba pake, kuchepa kwamphamvu kumawonjezeka
• Kusagwirizana ndi ma chemistry ena a simenti: simenti yapamwamba ya C3A imatha kupha madzimadzi mwachangu
• Mtengo: 2-3 nthawi zokwera mtengo pa lita imodzi kuposa zosankha za naphthalene
• Kuopsa kwa overdose: ngakhale 0.2% zowonjezera zingayambitse kulekanitsa kwakukulu ndi kuchedwa kukhazikitsidwa

2. Mtengo PNS (Polynaphthalene sulfonate) Superplasticizers

Ntchito yamakampani. PNS yakhala ikugwiritsidwa ntchito kwa zaka zambiri. Imabalalitsa tinthu tating'ono ta simenti kudzera pa electrostatic repulsion-tinthu tating'onoting'ono timapeza ndalama zoyipa ndikukankhira padera..

Ubwino

• Kulekerera kwakukulu kwa kusintha kwa simenti: amagwira ntchito ndi pafupifupi simenti iliyonse ya Portland
• Mtengo wotsika: pafupifupi theka la mtengo wa PCE pa unit of active solid
• Khalidwe lolosera: Mlingo ndi zotsatira zake zomveka bwino

kuipa

• Kuwonongeka kofulumira: nthawi zambiri amataya 50% mayendedwe oyambira mkati 30 mphindi
• M'munsi pazipita madzi kuchepetsa: kawirikawiri caps pa 25-30%
• Mlingo wapamwamba wofunikira: 0.5% ku 2.0% bwc ndizofala
• Zingayambitse kung'anima akonzedwa ngati overdose osakaniza calcium nitrate accelerators

3. Melamine-Based Superplasticizers (SMF)

Sulfonated melamine formaldehyde (SMF) utomoni ndi njira ina electrostatic. Ndizochepa kwambiri pano koma zimagwiritsidwabe ntchito m'mapulogalamu apadera.

Ubwino

• Kubalalika kofulumira kwambiri: pafupifupi nthawi yomweyo fluidity phindu pambuyo kusakaniza
• Low mamasukidwe akayendedwe kumanga: zabwino kwa SCC kusakanikirana ndi zolipiritsa zambiri
• Malo oyera: kuchedwa kochepa poyerekeza ndi PCE

kuipa

• Kugwira ntchito kwakanthawi kochepa kwambiri: 15-30 Mphindi zochulukirapo ndiye kuchepa kwachangu
• Mlingo wambiri: 1.0% ku 3.0% bwc
• Osayenera nyengo yotentha: kutentha kumatsika pamwamba pa 25 ° C

4. Naphthalene-Based (Mtengo wa SNF) Superplasticizers

Zofanana ndi PNS mu chemistry, koma ndi kugawa kosiyana pang'ono kwa maselo. Nthawi zambiri kusinthana ndi PNS m'munda.

Ubwino

• Kuchepetsa kwabwino konse kwa madzi: 20-25%
• Mtengo wotsika
• Ikupezeka padziko lonse lapansi

kuipa

• Mtundu wa Brownish ukhoza kusokoneza konkire yowala
• Zofanana zakuwonongeka kofanana ndi PNS
• Zosathandiza pa SCC yothamanga kwambiri pamwambapa 700 mamilimita slump otaya popanda kwambiri mlingo

5. Synthetic Polymer Blends (Zophatikiza)

Zogulitsa zambiri zamalonda ndizophatikiza za PCE ndi retarders kapena ma viscosity-modifying agents (Zithunzi za VMA). Ichi ndi pragmatic field solution.

Ubwino

• Kuchita bwino: kuchepetsa madzi pang'ono ndi kusunga bwino
• Nthawi zambiri zotsika mtengo kuposa PCE yoyera
• Zapangidwira ntchito zinazake monga nyengo yotentha kapena kupopa

kuipa

• Black box chemistry: simudziwa nthawi zonse zomwe mukupeza
• Kusagwirizana kwa batch-to-batch kuchokera kwa ogulitsa ena
• Itha kuyanjana molakwika ndi zosakaniza zina monga ma air-entrainers

6. Lignosulfonate-Based (LS) Zotengera

Plasticizer wasukulu yakale. Osagwiritsidwa ntchito okha mu SCC koma nthawi zina amaphatikizana ndi PCE kuti achepetse mtengo.

Ubwino

• Mtengo wotsika kwambiri
• Zina zomwe zimalowetsa mpweya zimatha kuwongolera kuzizira kwachisanu

kuipa

• Kuchepetsa madzi otsika kwambiri (5-10%)
• Zingayambitse kuchepa kwakukulu komanso mpweya wokwanira 8%
• Osavomerezeka ngati wothandizila wamkulu wa superplasticizer wodzipangira yekha konkriti SCC

7. Specialty Mid-Range (BAMBO) Superplasticizers

Izi zimachepetsa kusiyana pakati pa zochepetsera madzi wamba ndi ma superplasticizer apamwamba kwambiri. Iwo ndi kunyengerera.

Ubwino

• Kusungika kwabwinoko kuposa PNS koma mtengo wotsika kuposa PCE
• Zabwino pamapulogalamu otsika a SCC ngati mawonekedwe osunthika

kuipa

• Sitingathe kukwaniritsa milingo yothamanga kwambiri (pamwamba 750 kutsika kwa mm kumakhala kovuta)
• Zosankha zochepa kuchokera kwa opanga akuluakulu

Quick-Reference Comparison Table

Njira Zoyesera Zovuta za SCC Mix Yanu

Kusankha superplasticizer wothandizira kwa self-compacting konkire SCC ndi theka la nkhondo. Muyenera kutsimikizira magwiridwe antchito ndi mayeso wamba awa:

• Mayeso a Slump Flow (Chithunzi cha ASTM C1611 / MU 12350-8): Zolinga 650-800 mm. Yesani nthawi ya T50-masekondi kuti mufike 500 mm kusamba. 2-5 masekondi ndi abwino.
• Mayeso a V-Funnel (MU 12350-9): Lembani fungulo lokhala ngati V, tsegulani pansi, ndi nthawi yopita. 6-12 masekondi ndi malo okoma. Pamwamba 25 masekondi amasonyeza osauka mamasukidwe akayendedwe.
• Mayeso a L-Box (MU 12350-10): Amayesa kudutsa rebar. Chiŵerengero cha H2/H1 chiyenera kukhala > 0.8 kwa kulimbitsa bwino.
• Mayeso a J-Ring (Chithunzi cha ASTM C1621): Miyeso yodutsa. Kutalika kwa sitepe kukhale kochepera 15 mm.

Malangizo Othandiza Mlingo (Kutengera Zomwe Zachitika Patsamba Lantchito)

Osakhulupirira datasheet mwakhungu. Nawa malangizo athu oyesedwa m'munda:

• Nthawi zonse yambani ndi a mayeso a saturation point. Wonjezerani mlingo 0.1% kuwonjezeka kwa kutentha kwa thupi mpaka kuchepa kwa magazi kumachepa. Uwu ndiye mlingo wanu waukulu kwambiri.
• Za PCE: kuyambira pa 0.3% bwc. Osapitirira 1.0% pokhapokha mutakhala ndi VMA mukusakaniza.
• Za Mtengo PNS: kuyambira pa 0.8% bwc. Yembekezerani kuti muwonjezerenso mlingo ngati nthawi yonyamula idutsa 30 mphindi.
• Za melamine: mlingo pakati 1.5% ndi 2.5% bwc. Sakanizani kwambiri kwa 3-4 mphindi pambuyo kuwonjezera.

Chenjerani ndi Izi 5 Misampha Wamba

• Kumwa mowa mopitirira muyeso: Kuchulukirachulukira kwa superplasticizer podzipangira konkriti SCC kumayambitsa magazi, tsankho, ndi kuchedwa kukhazikitsa. Tawonapo konkriti kukhala pulasitiki 48 maola.
• Kutentha kumasinthasintha: Kusakaniza kopangidwira 20 ° C kudzachita mosiyana pa 35 ° C. Chepetsani mlingo wa PCE ndi 20% nyengo yotentha, kapena gwiritsani ntchito retarder blend.
• Kusagwirizana kwa simenti ndi phala: SCC ikufunika phala voliyumu ya 35-40%. Ngati phala lanu latsamira, palibe superplasticizer yomwe ingakupulumutseni.
• Kusakaniza dongosolo: Onjezerani superplasticizer ndi madzi osakaniza, osati pa zosakaniza youma. Kuchedwetsa kuwonjezera kungayambitse kung'anima kapena kusabalalika bwino.
• Kunyalanyaza mawonekedwe ophatikizika: Ma aggregates ophwanyidwa amafunikira 10-15% superplasticizer kuposa miyala yozungulira.

Pansi Pansi Pa Ntchito Yanu Yotsatira

Ngati mukufuna magwiridwe antchito kwambiri, khalidwe lodziwikiratu, ndi mazenera aatali ogwira ntchito, kupita ndi a PCE-based superplasticizer agent for self-compacting konkriti SCC. Ndi kubetcha kotetezedwa kwa 90% za mapulogalamu a SCC.

Ngati bajeti yanu ndi yolimba ndipo mayendedwe anu ndi osavuta (kuyika mwachangu pamalopo), a PNS kapena naphthalene-based product idzagwira ntchito. Ingokhalani okonzeka kutaya kugwa mwachangu.

Pazochitika zilizonse zapadera - precast, pansi pa madzi, kapena kugwiritsa ntchito nyengo yotentha a mankhwala osakanikirana zopangidwira chikhalidwe chimenecho. Osalingalira.

Lekani Kungoganiza. Yambani Kuthira ndi Chikhulupiriro

Muli ndi data. Muli ndi kufananiza. Tsopano ndi nthawi yoti tichitepo kanthu.

Tikukulimbikitsani kuti muyese osachepera awiri opangira ma superplasticizer odzipangira okha SCC kuchokera kwa opanga odalirika musanapereke ndalama zambiri. Yesani pulogalamu yonse yoyeserera: kuchepa kwamphamvu, V-njira, L-bokosi, ndi J-ring pa onse awiri 5 miniti ndi 45 mphindi mutatha kusakaniza.

Ngati mukufuna malingaliro apadera, tawona zotsatira zabwino m'munda ndi MasterGlenium mndandanda (Mtengo wa BASF) kwa PCE yapamwamba kwambiri ndi Ndikukupatsani (GCP Applied Technologies) zophatikiza zotsika mtengo za PNS.

Osalola gulu lanu lotsatira la SCC kukhala mulu wokanidwa. Lumikizanani ndi woimira zaukadaulo kuchokera kwa omwe akukugulirani lero. Funsani zitsanzo zoyeserera. Chitani ntchito za lab. Mapangidwe anu-ndi mbiri yanu-zimadalira izo.

Wopereka
ConcreteAndMore ndi ogulitsa odalirika padziko lonse lapansi opanga zosakaniza za konkriti zogwira ntchito kwambiri komanso mankhwala omanga.. Ndi zaka zaukadaulo wamakampani, timakhazikika popereka mayankho anzeru kuphatikiza ma polycarboxylate superplasticizers, ulusi wa konkriti, defoams, opanga thovu, ndi zida zapamwamba za airgel thermal insulation. Ngati mukufuna konkriti admixture, chonde omasuka kulankhula nafe!