Lub teeb pob zeb Additives | High-Performance Foaming Agents rau Cellular Concrete
Hydroxypropyl Methylcellulose, los yog HPMC, yog cellulose ether admixture uas pab txhim kho cov khoom tshiab ntawm lub xeev cement ua los ntawm kev ua haujlwm raws li lub zog tuav dej thiab ua kom tuab. Qhov kev hloov kho tshuaj no hloov cov tshuaj khib nyiab yooj yim los ntawm kev sib xyaw ua ke kom poob dej sai thiab tawv daim ntawv thov rau hauv pliable., sib koom ua ke, thiab cov khoom siv ua haujlwm uas ua raws li qhov chaw ntsug. Rau cov neeg cog lus thiab cov qauv tsim, kev nkag siab HPMC yog qhov tseem ceeb rau kev ua tiav zoo ib yam, high-quality finishes nrog txo kev siv zog thiab cov khoom pov tseg.
Core Mechanism: Dej Retention Los Ntawm Colloidal Film
Ntawm nws lub hauv paus, HPMC ua hauj lwm los ntawm lub cev manipulating dej nyob rau hauv lub cementitious matrix. Thaum sib cuag nrog dej, nws ntev-chain polymer molecules hydrate thiab uncoil, tsim kom muaj kev tiv thaiv colloidal network. Lub network no tau txais txiaj ntsig zoo rau cov dej dawb molecules. Thaum sib tov rau hauv cement render, Qhov kev txiav txim no txo qis tus nqi ntawm cov dej evaporation mus rau hauv cov porous substrates thiab cov cua. Cov dej khaws cia tseem muaj rau qhov tseem ceeb txheej txheem ntawm cement hydration nyob rau lub sijhawm ntev. Hauv essence, HPMC tsim lub reservoir ntawm kev ua haujlwm, tiv thaiv cov tawv nqaij ntxov ntxov uas plagues renders tov nrog dej dawb. A 2018 Kev lag luam tsab ntawv ceeb toom los ntawm Lub Ntiaj Teb Mortar Additives Consortium tau txheeb xyuas cov txiaj ntsig no, Nco ntsoov tias HPMC cov khoom ntxiv tuaj yeem ua rau kom muaj nuj nqis khaws cia hauv qab no 75% mus dhau 95%, raws li ntsuas los ntawm txoj kev lim ntawv.
Tangible Impacts ntawm Render Workability thiab Application
Cov khaws cia dej ncaj qha txhais mus rau hauv ntsuas kev txhim kho hauv kev ua haujlwm ntawm trowel. Thawj yog txhim kho plasticity. Lub mortar ua buttery, cia nws kis tau yooj yim yam tsis muaj tearing lossis dragging. Thib ob, nws nce cohesiveness. Qhov no txhais tau hais tias cov xuab zeb hais nyob rau hauv kev ncua, tiv thaiv kev sib cais thiab los ntshav. Qhov tseem ceeb tshaj plaws rau kev siv ntsug, no cohesive lub cev dramatically txo sagging. Render tov nrog HPMC clings rau phab ntsa, tso cai rau cov neeg siv los tsim cov txheej tuab hauv ib qho dhau los. Cov qub tub rog applicators feem ntau piav txog qhov txawv li “hmo thiab hnub.” Raws li tus tswv plasterer James Kowalski tau sau tseg hauv kev xam phaj luam tawm, “Ib qho kev tsim qauv zoo nrog HPMC muab sijhawm rau koj qhib. Koj tsis sib tw nrog lub moos, uas txhais tau tias koj tuaj yeem tsom mus rau kev ua tiav ib qho zoo kawg nkaus, tooled tiav yam tsis muaj kev ntshai.” Qhov no ncua sijhawm qhib, feem ntau 30 rau 90 feeb ntev dua nyob ntawm qhov ntau npaum li cas thiab qhov chaw nyob ib puag ncig, yog qhov tshwm sim ncaj qha los ntawm kev tswj dej.
Tswv yim noj, Sib tov, thiab kev xav txog kev sib tham
| Qib viscosity (mPa·s) | Hom Tshuaj (% ntawm binder) | Cov nyhuv tseem ceeb ntawm Render |
|---|---|---|
| 400 – 4,000 | 0.1 – 0.2% | Txhim kho kev ua haujlwm thiab kev tuav dej nrog tsawg viscosity nce. |
| 10,000 – 20,000 | 0.2 – 0.3% | Balanced workability thiab sag tsis kam rau dav ntsug rendering. |
| 60,000 – 100,000 | 0.3 – 0.5% | High cohesion thiab anti-sag rau tuab, daim ntawv thov ib lub tsho loj los yog nyiaj siv ua haujlwm. |
HPMC feem ntau yog sib xws nrog lwm yam render cov khoom xyaw, tab sis muaj kev sib cuam tshuam. Nws ua haujlwm sib koom ua ke nrog cov neeg ua haujlwm huab cua los txhim kho khov-thaw durability thiab plasticity. Thaum siv nrog superplasticizers (high-range dej reducers), kev sib txuas ua ke feem ntau yog qhov zoo tshaj plaws: Ntxiv cov superplasticizer rau cov dej sib tov ua ntej kom tawg, Tom qab ntawd muab cov HPMC-qhuav mix. Thawj qhov kev lag luam tawm yog qhov muaj peev xwm qeeb hauv kev teeb tsa lub sijhawm thiab kev txhim kho thaum ntxov. Qhov no yog ib tug tswj, tsis yog kev puas tsuaj, nyhuv. Lub render tau txais lub zog ntsuab txaus los tiv thaiv kev puas tsuaj, thaum kawg kho lub zog tsis cuam tshuam. Qhov tseeb, Kev txhim kho hydration feem ntau ua rau lub zog siab dua qhov kawg piv rau qhov ua kom dej evaporated ntxov.
Tus nqi-Cov txiaj ntsig thiab qhov kawg Render Quality
Rau cov neeg cog lus, kev xam yog ncaj nraim. Ntxiv HPMC nce cov khoom siv ntawm cov tshuaj khib nyiab los ntawm cov npoo me me. Tus nqi no yog offset ntau zaus dhau los ntawm kev ua haujlwm ntawm kev ua haujlwm tau txais txiaj ntsig - thov sai dua, tsawg rework, thiab txo cov khoom pov tseg los ntawm sagging los yog tsis lees txais cov khoom siv. Qhov kawg hardened render exhibits superior zoo: txo cov yas shrinkage tawg vim tias txawm tias ya raws, txhim kho daim ntawv cog lus lub zog los ntawm zoo dua substrate wetting thiab adhesion, thiab denser, smoother nto uas yuav tsum tau siv zog ua kom tsawg. Txoj hauv kev no yog qhov tseem ceeb tshaj qhov kev xyaum ua dhau los ntawm kev yooj yim ntxiv tshaj dej los txhim kho kev ua haujlwm, ib txoj kev uas lav tsis muaj zog, ntxeem tau, thiab tawg-nrhiav tau.
Hnub no, HPMC yog tus txha caj qaum ntawm yuav luag tag nrho cov khoom zoo premixed qhuav mortar rau rendering. Nws qhov kev txhim khu kev qha tau ua rau nws tseem ceeb rau ob qho tib si lub Hoobkas tsim khoom thiab qhia rau ntawm qhov chaw batching. Rau txhua tus kws tshaj lij nrhiav kev ua kom zoo rau lawv cement render daim ntawv thov, ntsuam xyuas thiab koom nrog ib qho kev xaiv zoo HPMC cov khoom yog ib kauj ruam tseem ceeb. Pib los ntawm kev sab laj nrog koj tus neeg muab khoom sib xyaw kom xaiv cov qib viscosity kom raug rau koj qhov kev xav tau tshwj xeeb, thiab ua ib qho kev sim me me kom kho qhov ntau npaum li cas rau koj cov ntaub ntawv hauv zos thiab huab cua. Kev txhim kho hauv kev ua haujlwm thiab kev ua tiav tiav yuav pom tseeb tam sim ntawd.
Tus neeg muab khoom
ConcreteAndMore yog ib qho kev ntseeg siab thoob ntiaj teb cov khoom lag luam ntawm cov khoom siv ua haujlwm siab thiab cov tshuaj siv tsim kho.. Nrog xyoo ntawm kev lag luam kev txawj ntse, peb tshwj xeeb hauv kev muab cov kev daws teeb meem tshiab suav nrog polycarboxylate superplasticizers, pob zeb fibers, defoamers, foaming agents, thiab advanced airgel thermal rwb thaiv tsev cov khoom. Yog tias koj txaus siab rau kev sib xyaw ua ke, thov koj xav tiv tauj peb!