Dab tsi yog Admixtures thiab Dab tsi yog Hom Admixtures?

Admixtures yog ib pawg ntawm cov ntaub ntawv ntxiv rau pob zeb, mortar, lossis grout thaum sib tov los hloov lawv cov khoom lossis txhim kho lawv cov kev ua tau zoo. Cov ntaub ntawv no txawv ntawm cov khoom xyaw tseem ceeb ntawm cov pob zeb (cement, aggregates, dej) thiab siv me me kom ua tiav cov kev xav tau tshwj xeeb. Admixtures tuaj yeem hloov ntau yam khoom ntawm pob zeb, suav nrog kev ua haujlwm, teeb tsa lub sijhawm, lub zog, kav ntev, thiab ua haujlwm rau ib puag ncig yam. Lawv muab kev yooj yim hauv kev sib xyaw ua ke tsim, tso cai rau cov engineers thiab cov neeg tsim kho kom tsim cov qauv tsim kom tau raws li qhov project tshwj xeeb. Ntawm no yog cov sib txawv ntawm cov khoom siv feem ntau siv hauv kev tsim kho:

1. Dej-txo cov khoom siv (Plasticizers lossis Superplasticizers):

• Dej-txo admixtures yog cov additives uas txo cov dej ntsiab lus uas yuav tsum tau rau ib tug muab slump ntawm pob zeb tsis cuam tshuam nws workability. Lawv txhim kho cov flowability thiab kev ua haujlwm ntawm cov pob zeb sib tov, tso cai rau kev tso chaw yooj yim dua thiab compaction. Plasticizers feem ntau yog siv hauv pob zeb nrog lub sijhawm teeb tsa ib txwm, thaum cov khoom siv superplasticizers yog siv rau hauv cov pob zeb uas yuav tsum tau ncua sijhawm.

2. Retarding Admixtures:

• Retarding admixtures ncua sijhawm teem sijhawm ntawm pob zeb, mortar, lossis grout, tso cai rau kev ua haujlwm ntev thiab sijhawm tso kawm. Lawv muaj txiaj ntsig tshwj xeeb hauv cov huab cua kub lossis rau cov haujlwm loj uas yuav ncua kev thauj mus los, kev tso kawm, lossis ua tiav.

3. Accelerating Admixtures:

• Accelerating admixtures nce tus nqi ntawm kev teeb tsa thiab kev txhim kho thaum ntxov ntawm lub pob zeb, mortar, lossis grout, tso cai rau kev tsim kho sai dua thiab tshem tawm cov formwork thaum ntxov. Lawv feem ntau siv nyob rau hauv cov huab cua txias los yog thaum lub zog ceev ceev yuav tsum tau.

4. Cua-Entraining Admixtures:

• Cua-entraining admixtures qhia microscopic cua npuas rau hauv pob zeb lossis mortar, txhim kho nws cov kev tiv thaiv kom khov-thaw cycles, scaling, thiab abrasion. Lawv txhim khu kev ua haujlwm thiab ua haujlwm ntev ntawm cov pob zeb hauv cov huab cua hnyav thiab txo qhov kev pheej hmoo ntawm kev puas tsuaj los ntawm qhov kub thiab txias.

5. Retarding Air-Entraining Admixtures:

• Retarding huab cua-entraining admixtures muab cov khoom ntawm retarding thiab air-entraining admixtures, ncua lub sij hawm teem ntawm pob zeb thaum tseem entraining huab cua los txhim kho nws khov-thaw kuj. Lawv feem ntau yog siv nyob rau hauv cov huab cua txias los yog rau cov pob zeb uas raug rau khov thiab thawing voj voog.

6. Corrosion-Inhibiting Admixtures:

• Corrosion-inhibiting admixtures tiv thaiv embedded steel reinforcement hauv pob zeb los ntawm corrosion tshwm sim los ntawm kev ya raws, chlorides, los yog lwm yam aggressive agents. Lawv txuas ntxiv kev pab cuam lub neej ntawm cov vaj tse pob zeb thiab txo cov nqi kho thiab kho.

7. Shrinkage-Reduction Admixtures:

• Shrinkage-txo admixtures txo kom qhuav shrinkage hauv pob zeb, txo qhov kev pheej hmoo ntawm kev tawg thiab txhim kho lub sij hawm ntev. Lawv muaj txiaj ntsig zoo hauv cov pob zeb loj loj, cov khoom siv precast, thiab cov pob zeb ua haujlwm siab.

8. Waterproofing Admixtures:

• Waterproofing admixtures txhim kho cov impermeability ntawm pob zeb, txo cov dej nkag thiab tiv thaiv cov teeb meem ntawm ya raws xws li efflorescence, dampness, thiab corrosion. Lawv feem ntau yog siv rau hauv cov qauv hauv qab, hauv qab daus, qhov av, thiab cov qauv dej tuav.

9. Xim Admixtures:

• Coloring admixtures yog ntxiv rau cov pob zeb kom faib xim lossis ua tiav cov teebmeem zoo nkauj. Lawv tuaj nyob rau hauv ntau yam ntaub ntawv, nrog rau cov pigments, stains, dyes, thiab tinted sealers, tso cai rau customization ntawm pob zeb nto kom haum raws li cov kev cai tsim.

10. Rheology-Modifying Admixtures:

• Rheology-hloov admixtures hloov cov dej ntws thiab cov khoom rheological ntawm cov pob zeb, mortar, lossis grout los txhim kho kev ua haujlwm, pumpability, lossis viscosity tswj. Lawv feem ntau yog siv rau hauv tus kheej-consolidating pob zeb, shotcrete, thiab high-kev ua tau zoo pob zeb sib tov.

Cov no yog qee yam ntawm cov khoom siv tseem ceeb uas siv hauv kev tsim kho, txhua qhov muab cov txiaj ntsig tshwj xeeb thiab kev siv rau kev ua kom pom tseeb kev ua tau zoo thiab ua tau raws li qhov yuav tsum tau ua. Nws yog ib qho tseem ceeb los xaiv thiab muab cov khoom sib xyaw tsim nyog raws li qhov project specifications, ib puag ncig tej yam kev mob, thiab kev ua tau zoo.