7 Superplasticizer Agents don SCC: Ƙarshen Kwatancen Kai-da-Kai

80% Na Ganowar SCC Komawa zuwa Abu ɗaya

Ga kididdigar da ta hana mu sanyi: A 2023 binciken da kungiyar European Ready Mixed Concrete Organisation ta gudanar ya gano cewa a kan 80% na filin-ki yarda kai compacting kankare (SCC) batches kasa saboda rashin jituwa ko kuskuren dosing na superplasticizer wakili don ƙaddamar da kankare SCC. Ba mummunan jimillar ba. Ba matalauta mix zane. Sinadarin hadaddiyar giyar ta yi kuskure.

Mun kasance a cikin batching shuka da kuma a kan wurin aiki. Mun san firgita lokacin da slump kwarara ya fado 800 mm amma manna yana fara zubar jini. Ko kuma lokacin da simintin ya daina gudana a tsakiyar akwatin L. Zaɓin wakilin superplasticizer ba daidai ba don ƙaddamar da kankare SCC ba ƙaramin kuskure ba ne-haɗari ne na tsari da rugujewar kuɗi..

Wannan labarin ba shine mu ba, kwatancen kai-da-kai na manyan iyalai bakwai na superplasticizer da ake amfani da su a SCC a yau. Za mu ba ku mai kyau, mara kyau, da kuma mummuna don haka za ku iya zaɓar kayan aikin da ya dace don haɗin ku.

Me yasa SCC ke Buƙatar Wakilin Superplasticizer don Haɗin Kan Kankare SCC

Kafin mu kwatanta, bari mu bayyana sarai akan aikin da wannan sinadari ya yi. SCC tana buƙatar gudana ƙarƙashin nauyinta, cika kowane lungu na hadadden tsari, kuma ku wuce ta cikin tsattsauran rabe-raben rebar-duk ba tare da rarrabewa ba. Daidaitaccen masu rage ruwa ba za su iya yanke shi ba. Shi ya sa muke amfani masu rage yawan ruwa (HRW), musamman superplasticizers.

Wakilin superplasticizer don ƙaddamar da kankare SCC yana aiki ta hanyar haɗa nau'ikan siminti da ƙirƙirar ko dai electrostatic repulsion. (tsofaffin al'ummomi) ko tsangwama (PCE na zamani). Wannan ya karya agglomerates, 'yantar da ruwan da aka kama da kuma ƙara yawan ruwa ba tare da ƙara ƙarin ruwa ba. Sakamakon? Siminti mai gudana wanda ke haɗawa.

1. PCE (Polycarboxylate Ether) Superplasticizers

Wannan shine ma'aunin zinare na SCC na zamani. Babu gasa. PCEs suna amfani da tsari mai kama da nau'in polymer tare da ƙungiyoyin carboxylate waɗanda ke jingina zuwa siminti da sarƙoƙin ether mai tsayi da ke haifar da tsangwama..

Ribobi

• Rage ruwa na musamman: har zuwa 40% idan aka kwatanta da wani fili mix
• Kyakkyawan riƙewar iya aiki: 60-90 mintuna na slump rayuwa ba tare da gagarumin asara
• Ƙananan sashi: yawanci 0.2% ku 1.5% da nauyin siminti (bwc)
• Injiniya don SCC: cimma slump kwarara na 650-800 mm sauƙi

Fursunoni

• Babban hankali ga zafin jiki: Yana aiki mafi kyau tsakanin 15 ° C da 30 ° C sama da haka, slump asarar accelerates
• Rashin dacewa da wasu siminti: manyan simintin C3A na iya kashe ruwa cikin sauri
• Farashin: 2-3 sau mafi tsada a kowace lita fiye da zaɓuɓɓukan tushen naphthalene
• Hadarin wuce gona da iri: ko da 0.2% kari na iya haifar da rarrabuwar kawuna da jinkirta saiti

2. PNS (Polynaphthalene sulfonate) Superplasticizers

Horse na masana'antu. An yi amfani da PNS shekaru da yawa. Yana watsar da barbashi siminti ta hanyar repulsion electrostatic - barbashi suna samun caji mara kyau kuma suna turawa baya..

Ribobi

• Babban haƙuri ga bambancin siminti: yana aiki da kusan kowane siminti na Portland
• Maras tsada: kusan rabin farashin PCE kowace raka'a mai ƙarfi mai ƙarfi
• Hali mai iya tsinkaya: da-fahimtar dosages da sakamako

Fursunoni

• Rashin raguwa cikin sauri: sau da yawa asara 50% na farko kwarara cikin 30 mintuna
• Ƙananan matsakaicin raguwar ruwa: yawanci iyawa a 25-30%
• Ana buƙatar mafi girma sashi: 0.5% ku 2.0% bwc na kowa
• Zai iya haifar da saitin walƙiya idan an yi fiye da kima a haɗe tare da haɓakar nitrate na calcium

3. Superplasticizers na tushen Melamine (SMF)

Sulfonated melamine formaldehyde (SMF) resins wani zaɓi ne na electrostatic. Ba su da yawa a yanzu amma har yanzu ana amfani da su a takamaiman aikace-aikacen da aka riga aka yi.

Ribobi

• Watsewa cikin sauri: kusan samun ruwa nan da nan bayan haɗuwa
• Low danko ginawa: mai kyau ga SCC ya haɗu tare da babban abun ciki na tara
• Tsaftace saitin: ƙarancin jinkiri idan aka kwatanta da PCE

Fursunoni

• Matukar gajeriyar riƙewar iya aiki: 15-30 mintuna max sannan saurin raguwar asarar
• Babban sashi: 1.0% ku 3.0% bwc
• Bai dace da yanayin zafi ba: aikin yana raguwa sama da 25 ° C

4. Bisa Naphthalene (SNF) Superplasticizers

Kama da PNS a cikin ilmin sunadarai, amma tare da rarraba nauyin nauyin kwayoyin dan kadan daban-daban. Yawancin lokaci ana iya canzawa tare da PNS a cikin filin.

Ribobi

• Kyakkyawan raguwar ruwa gabaɗaya: 20-25%
• Maras tsada
• Akwai shirye-shirye a duniya

Fursunoni

• Launi mai launin ruwan kasa na iya canza launin siminti mai launin haske
• Matsalolin asara iri ɗaya kamar PNS
• Ba shi da tasiri don babban kwararar SCC a sama 700 mm slump kwarara ba tare da wuce kima sashi

5. Haɗaɗɗen Polymer Synthetic (Haɗuwa)

Yawancin samfuran kasuwanci gaurayawan PCE ne tare da masu sake dawowa ko wakilai masu gyara danko (VMAs). Wannan ingantaccen filin bayani ne.

Ribobi

• Daidaitaccen aiki: matsakaicin raguwar ruwa tare da riƙe mai kyau
• Sau da yawa mai rahusa fiye da PCE mai tsafta
• An tsara don takamaiman aikace-aikace kamar yanayin zafi ko yin famfo

Fursunoni

• Sinadarin Black Box: ba koyaushe kuke sanin abin da kuke samu ba
• Rashin daidaiton tsari-zuwa-tsari daga wasu masu kaya
• Yana iya yin mu'amala mara kyau tare da sauran abubuwan haɗin gwiwa kamar masu shigar da iska

6. Lignosulfonate - tushen (LS) Abubuwan da aka samo asali

The old-school plasticizer. Ba kasafai ake amfani da shi kadai a cikin SCC amma wani lokacin ana haɗe shi da PCE don rage farashi.

Ribobi

• Matsakaicin farashi mai rahusa
• Wasu tasirin gefen da ke haifar da iska na iya inganta juriya-narke

Fursunoni

• Ragewar ruwa sosai (5-10%)
• Zai iya haifar da jinkiri mai mahimmanci da abun cikin iska 8%
• Ba a ba da shawarar azaman wakili na farko na superplasticizer don ƙaddamar da kankare SCC ba

7. Musamman Tsakanin Range (MR) Superplasticizers

Waɗannan suna cike gibin da ke tsakanin daidaitattun masu rage ruwa da manyan na'urori masu ƙarfi. Su sulhu ne.

Ribobi

• Mafi kyawun ɓata lokaci fiye da PNS amma ƙananan farashi fiye da PCE
• Yayi kyau don aikace-aikacen SCC mara ƙarfi kamar aikin tsari na tsaye

Fursunoni

• Ba za a iya cimma mafi girman matakan kwarara ba (a sama 750 mm slump kwarara yana da wahala)
• Zaɓin iyaka daga manyan masana'antun

Teburin Kwatanta Mai Sauri

Hanyoyin Gwaji na Mahimmanci don Mix ɗin ku na SCC

Zaɓin wakilin superplasticizer don ƙaddamar da kankare SCC shine rabin yaƙin. Dole ne ku tabbatar da aiki tare da waɗannan daidaitattun gwaje-gwaje:

• Gwajin Gudun Raɗaɗi (Saukewa: ASTM C1611 / IN 12350-8): manufa 650-800 mm. Auna T50 lokacin- daƙiƙa guda don isa 500 mm watsa. 2-5 seconds ne manufa.
• Gwajin V-Funnel (IN 12350-9): Cika mazugi mai siffar V, bude kasa, da lokacin kwarara. 6-12 seconds shine wuri mai dadi. Sama 25 seconds yana nuna rashin danko.
• Gwajin L-Box (IN 12350-10): Simulates suna wucewa ta rebar. Ya kamata rabon H2/H1 ya kasance> 0.8 don ƙarfafawa na al'ada.
• Gwajin J-Ring (Saukewa: ASTM C1621): Auna wucewa iyawar. Tsayin matakin yakamata ya zama ƙasa da 15 mm.

Jagororin Amfani Na Musamman (Dangane da Kwarewar Gidan Aiki)

Kar a amince da takaddar bayanan a makance. Ga shawararmu da aka gwada a filin:

• Koyaushe farawa da a gwajin jikewa. Ƙara sashi a ciki 0.1% karuwa har slump kwarara ya daina karuwa. Wannan shine max ingantaccen adadin ku.
• Domin PCE: fara a 0.3% bwc. Kada ku wuce 1.0% sai dai idan kuna da VMA a cikin mahaɗin.
• Domin PNS: fara a 0.8% bwc. Yi tsammanin sake yin allurai idan lokacin jigilar kaya ya wuce 30 mintuna.
• Domin melamine: kashi tsakanin 1.5% kuma 2.5% bwc. Mix tsanani don 3-4 mintuna bayan kari.

Hattara da Wadannan 5 Tarko gama gari

• Yawan sha: Yawancin wakili na superplasticizer don ƙaddamar da kankare SCC yana haifar da zubar jini, wariya, da jinkirta saitin. Mun ga kankare tsayawa filastik don 48 hours.
• Yanayin zafi yana jujjuyawa: Haɗin da aka tsara don 20 ° C zai kasance daban a 35 ° C. Rage adadin PCE ta 20% a yanayin zafi, ko amfani da gauraya retarder.
• Siminti-manna rashin daidaituwa: SCC yana buƙatar ƙarar manna na 35-40%. Idan mannanku ya yi laushi, babu superplasticizer da zai cece ku.
• odar hadawa: Ƙara superplasticizer tare da ruwan hade, ba akan busassun kayan abinci ba. Ƙarin jinkiri na iya haifar da saitin walƙiya ko rashin tarwatsawa.
• Yin watsi da jimillar siffar: Murƙushe tarawar angular suna buƙatar 10-15% mafi superplasticizer fiye da zagaye tsakuwa.

The Bottom Line for Your Next Project

Idan kana buƙatar iyakar aiki, halin iya tsinkaya, da dogayen tagogin aiki, je da a Wakilin superplasticizer na tushen PCE don ƙaddamar da kankare SCC. Shi ne mafi aminci fare ga 90% na SCC aikace-aikace.

Idan kasafin kuɗin ku yana da tsauri kuma kayan aikin ku masu sauƙi ne (nan da nan jeri a kan site), a PNS ko naphthalene tushen samfurin zai fara aiki. Kawai ku kasance cikin shiri don saurin slump asarar.

Ga kowane yanayi na musamman-precast, karkashin ruwa, ko yanayin zafi-amfani a samfurin gauraye tsara don wannan takamaiman yanayin. Kada ku yi tsammani.

Dakatar da zato. Fara Zubawa tare da Amincewa

Kuna da bayanan. Kuna da kwatancen. Yanzu lokaci ya yi da za a dauki mataki.

Muna ba da shawarar ku gwada aƙalla wakilai na superplasticizer guda biyu don ƙaddamar da kankare SCC daga mashahuran masana'antun kafin ƙaddamar da wadatar da yawa. Gudanar da cikakkiyar yarjejeniya ta gwaji: slump kwarara, V-manufari, L-akwatin, da J-ring a duka biyu 5 minti kuma 45 mintuna bayan hadawa.

Idan kuna son takamaiman shawara, mun ga fitattun sakamakon filin tare da MasterGlenium jerin (BASF) don PCE mai girma da kuma Ina ba ku (Abubuwan da aka bayar na GCP Applied Technologies) don haɗakar PNS masu tsada.

Kada ka bari rukuninka na SCC na gaba ya ƙare a cikin ɗimbin ƙi. Tuntuɓi wakilin fasaha daga mai samar da ku a yau. Nemi samfuran gwaji. Yi aikin lab. Tsarin ku - da sunan ku - sun dogara da shi.

Mai bayarwa
ConcreteAndMore amintaccen mai siyar da simintin siminti ne na manyan ayyuka da sinadarai na gini.. Tare da shekarun gwanintar masana'antu, mun ƙware wajen samar da sabbin hanyoyin magancewa gami da polycarboxylate superplasticizers, kankare zaruruwa, defoamers, wakilai masu kumfa, da ci-gaba na Airgel thermal insulation kayayyakin. Idan kana sha'awar kankare admixture, don Allah a ji daɗin tuntuɓar mu!