Kev siv nrawm Choj Siv

Lub ABC Txuj Ci

Mohiuddin Ali Khan Ph.D., M.Phil., DIC, PE, hauv Kev Siv Hluav Taws Xob Riam, Siv 2015

Kev tsim kho tus kheej / compacting qhob

Qhov yooj yim ntawm kev tso kawm thiab kev thov txo qis rau kev ua haujlwm txawj ntse yog qhov tseem ceeb ntawm kev siv SCC. Nws tuaj yeem siv nrog cov dej tsim hluav taws xob ntau kom ua tiav cov haujlwm siab thaum ntxov ua haujlwm. Txoj kev kho kom zoo yog qhov tseem ceeb.

SCC muaj cov plhaw thiab nrawm heev uas tsis muaj kev sib cais. Nws siv cov ntawv tshwj xeeb admixtures, uas radically hloov kev poob qis thiab flowability. Piv txwv li cov lus tshaj tawm yog cov viscous hloov pauv thiab cov ua haujlwm siab polycarboxylate polymers. SCC yog cov txheej txheem txhim kho ntawm HPC, nrog qhov kev ua kom nruj thiab lub zog ntau dua li cov uas ib txwm muaj.

Cov txiaj ntsig yog:

• Nws muab cov tsos zoo dua thiab lub sijhawm ntev.

• Nws tshem tawm qhov xav tau kev co.

• Lub pob zeb ua kom tau yog homogeneous zoo nrog rau cov npoo tsis tiav.

• Txhawm rau txhim kho kom ruaj khov ntxiv, calcium-nitrite corrosion inhibitor yuav ntxiv rau qhov sib xyaw.

• Nws nce siab tswj tau zoo ua tau nrog qhov muaj nuj nqis ntau tshaj ntawm 9 ksi.

• The voids thiab zib ntab pom pom nyob rau hauv ntau cov tsoos qhob sib tov yog zam.

• Nws tuaj yeem siv kom ua tiav hauv cov phiaj xwm kev tsim kho tshiab nrog rau kev tso nyuaj thiab ua tiav.

• Nws muaj txiaj ntsig zoo rau kev kho vaj tse ntawm kev ua mauv.

• Nws ua hauj lwm zoo rau kev ua kom muaj zog thaum cov khoom siv yuav tsum muab tso rau hauv cov ntawv kaw nrog cov kev tiv thaiv kom muaj zog.

• Lub pob zeb ua ke tau ntws tawm es tsis txhob ntsuas qhov siab ntawm lub pob tw pob taub, txoj kab uas hla ntawm lub voj voos ncig uas tso tawm ntawm qhov kev ntsuas qis ntawm lub khob hliav ntsuas.

• Kev nqus pob zeb ua kom yooj yim dua. Cov ntawv tsis tas yuav tsum muaj vibrated los sib sau ua ke pob zeb.

• Muaj kev txuag nyiaj vim tias cov neeg ua haujlwm tuaj yeem nchuav cov chaw tsim kho loj uas siv ib lub xwb.

• Vim tias lub sijhawm vibration yog txuag, SCC pab ABC; nws yog cov pob zeb ua haujlwm tau yooj yim dua nrog qis permeability dua li cov kab sib xyaw.

SCC rau kev siv rau hauv cov txheej txheem ua haujlwm: thaum cov pob zeb ua pob zeb siv rau hauv cov cuab yeej ua pa tsis sib haum, cov pob zeb sib xyaw ua ke yuav txuas ntawm cov khoom thaiv, uas yuav ua rau cais cov pob zeb thaiv ntawm sab hauv thiab sab nraud ntawm lub tawb tiv thaiv kom ruaj khov. SCC ua tau rau siv nyob rau hauv congested drilled shaft applications.