Qhov ntau polycarboxylic superplasticizer yog ntxiv rau, cov dej haus tsawg dua?

Qhov ntau npaum li cas ntawm polycarboxylate superplasticizer thiab nws cov txiaj ntsig dej tsis ua raws li txoj kev sib raug zoo, vim nws ua tau los ntawm ntau yam.

1.Initial theem: kev txo cov nyhuv dej nce ntxiv nrog noj tshuaj

• Dispersion ua tiav kev txhim kho: Thaum cov tshuaj tsawg, cov lwg me me ntawm SuperPlasticizer Adsorb mus rau sab qab los ntawm electrostatic repuls lossis cov khoom sib tw thaiv. Qhov no txo ​​flocculation thiab tso tawm cov dej encapsulated, nce cov dej-txo tus nqi.
• Siab txhim kho: Nyob rau theem no, raws li cov koob tshuaj nce, kis ntawm cov pob zeb ua kom nce ntxiv, thiab txo cov nyhuv dej sib txheeb yog qhov ntau dua nrog cov nqi.

2.Fter lub ntsiab lus tseem ceeb: Ntxhib ruaj khov

• Adsorption surmation: Thaum cov nqi ntawm SuperPlasticizer ncav cuag cov chaw sab nrauv ntawm cov cement), feem ntau}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}.
• Sab kev mob tawm:

Ntau dhau lawm: Siv ntau dhau ntawm SuperPlasticizer yuav txuas lub sijhawm teem sijhawm, cuam tshuam rau kev ua kev siv khoom.

Kev Siv Cua Ntau Dhau: Some polycarboxylate superplasticizers contain air-entraining agents. Excessive use can lead to a high air content (>5%), uas txo cov ua kom muaj zog.

Los ntshav thiab sib cais: Dej dawb ntau dhau yuav ua rau cov paste sib cais los ntawm cov kab ke, cuam tshuam rau homogeneity.

3. Cov kev cuam tshuam ntawm kev siv ntau dhau

• Muaj zog regression: Kev siv ntau dhau ntawm SuperPasticizer yuav cuam tshuam nrog cov txheej txheem haas casent kom poob qis ntawm tus qauv (piv txwv li, c30 pob zeb ua kom muaj zog qis dua 34.5MPA).
• Tsis txawv viscor viscosity: Hauv qee kis, ntau ntau ntau ntxiv yuav ua rau muaj kev nce qib tam sim ntawd (piv txwv li cov tee tawm ntawm 600mm), ua rau "hauv qab nplaum".
• Kev phem kev cuam tshuam: Tus nqi ntawm SuperPasticizer yog kwv yees li 3000 rmb ib tuj, thiab overuse yuav nce ntxiv tus nqi ntawm cov pob zeb (piv txwv li ntawm 10 rmb / m³).

4.Best cov kev coj ua cov phiaj xwm tiag tiag

• Kev sib xyaw sib xyaw los txiav txim siab ntau npaum li cas: Siv cov neat ua kom pom kev ntsuas dav dav (piv txwv li, loj dua los yog sib npaug ntawm 160 hli tom qab muaj kev sib npaug los nrhiav cov pob zeb ua.
• Dynamic Kev Haum: Thaum kub lub caij kub (saum ntuj 35 degree), cov tshuaj degree), yuav tsum tau nce ntxiv los ntawm 0. 2% los them nyiaj rau kev poob qis. Thaum siv High-alkali Maas (Na₂oleQ> {{}}}. 6%), cov tshuaj yuav tsum tau nce ntxiv.
• Kev thev naus laus zis tshuab: Sib txuas polycarboxylate superplasticizylate superplasticer nrog retallsone ntawm {}}}}}}}}}}}}}}}}}}}}}}}}}.

5.typical rooj plaub

• High-ceev Rail Box Girder C50: Ntawm 1.8% ntau npaum li cas, cov dej txo qis ncav cuag 35%, tab sis thaum cov tshuaj ntau tshaj 2. {%, Thiab lub zog compressive zog poob los ntawm 12%.
• Super-high-stre-stre comped qhob: Ntawm 1.5% kev tshuaj, kis yog 65 {{4 {4 hli} hli. Thaum cov koob tshuaj mus txog 2.0%, feem ntau tshwm sim, xav tau kev txo qis rau 1.6% thiab ntxiv 30kg / m³ tshauv kom kho viscosity.

Polycarboxylate SuperPasticizer muaj qhov kev ua kom zoo tshaj plaws ntawm lub qhov rai (feem ntau {}}. 8% rau 1.5%). Tshaj li tus nqi tseem ceeb, cov dej-txo tus nqi tsis nce thiab yuav ua teeb meem zoo. Nws raug nquahu kom txiav txim siab txog kev khwv nyiaj txiag rau txhua txoj haujlwm los ntawm kev sim ua haujlwm thiab ua kom zoo los ntawm kev sib txuas nrog lwm tus admixtures.