Dab tsi yog Admixture hauv Kev Tsim Kho?

Hauv kev tsim kho, cov khoom sib xyaw yog hais txog cov khoom siv uas tsis yog dej, sib sau ua ke, cov ntaub ntawv cementitious, lossis fibers uas ntxiv rau pob zeb, mortar, lossis grout los hloov nws cov khoom lossis txhim kho nws cov kev ua tau zoo. Admixtures yog siv los hloov cov pob zeb tshiab los yog tawv tawv hauv ntau txoj hauv kev, tso cai rau kev tswj xyuas ntau dua ntawm nws cov khoom thiab txhim kho nws cov kev ua haujlwm, durability, lub zog, thiab lwm yam ntxwv. Nov yog qee hom kev sib xyaw ua ke siv hauv kev tsim kho:

1. Dej-txo cov khoom xyaw:

• Cov dej txo qis, tseem hu ua plasticizers lossis superplasticizers, yog cov khoom ntxiv uas txo cov ntsiab lus dej uas yuav tsum tau ua kom ua tiav qhov kev xav tau ntawm cov pob zeb uas tsis muaj lub zog los yog ua haujlwm ntev. Lawv txhim kho cov dej ntws thiab kev ua haujlwm ntawm cov pob zeb sib tov, ua kom yooj yim rau qhov chaw thiab ua tiav.

2. Retarding Admixtures:

• Retarding admixtures yog siv los ncua lub 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 yog cov additives uas ua rau kom qhov chaw thiab kev loj hlob ntxov ntawm cov pob zeb, mortar, lossis grout, uas tso cai rau kev tsim kho sai dua thiab tshem tawm ntxov ntawm formwork. 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 yog additives uas qhia microscopic huab cua npuas rau hauv pob zeb los yog mortar, txhim kho nws tsis kam mus rau khov-thaw cycles, scaling, thiab puas. 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 yog additives uas pab tiv thaiv embedded steel reinforcement nyob rau hauv pob zeb los ntawm corrosion los ntawm raug rau 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 yog cov additives uas txo qhov ziab kom qhuav hauv cov pob zeb, mortar, lossis grout, txo qhov kev pheej hmoo ntawm kev tawg thiab txhim kho lub sijhawm ntev. Lawv yog tshwj xeeb tshaj yog pab tau nyob rau hauv loj qhob qhov chaw, precast qhob ntsiab, thiab high-kev ua tau zoo pob zeb sib tov.

8. Waterproofing Admixtures:

• Waterproofing admixtures yog cov additives uas txhim kho impermeability ntawm pob zeb, mortar, los yog grout, 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.

Hauv cov ntsiab lus, cov khoom sib xyaw ua si yog lub luag haujlwm tseem ceeb hauv cov cuab yeej ua vaj tsev niaj hnub, tso cai rau kev hloov pauv ntau dua, kev ua tau zoo, thiab kev ua tau zoo hauv kev tsim kho. Los ntawm kev xaiv thiab muab cov khoom sib xyaw tsim nyog rau hauv cov khoom sib xyaw ua ke, cov neeg tsim khoom thiab cov kws tsim khoom tuaj yeem ua tiav cov kev tsim qauv tshwj xeeb, txhim kho cov txheej txheem tsim kho, thiab txhim kho cov kav ntev thiab kev ruaj khov ntawm cov pob zeb ua vaj tse.