Dab tsi yog qhov cuam tshuam ntawm cov pob zeb poob hauv qhov chaw tsim kho?

Qhob slump feem ntau yog hais txog plasticity thiab pumpability ntawm qhob. Cov xwm txheej cuam tshuam nrog kev poob qis suav nrog kev hloov pauv hauv kev muab qhab nia, cov ntsiab lus dej, qhov hnyav ntawm cov khoom siv batching, thiab cov khoom siv sib xyaw. Ib qho tseem ceeb tshaj plaws yog qhov ntsuas kub ntawm cov cement.

Slump qhia txog kev ua haujlwm ntawm pob zeb, tshwj xeeb yog nws lub peev xwm los xyuas kom meej kev tsim kho. Qhov no suav nrog cov khoom xws li dej tuav, fluidity, thiab cohesion.

Kev ua haujlwm tau hais txog qhov yooj yim ntawm kev tuav, tso, thiab compacting ua vaj tse kom ua tiav cov qauv sib xws thiab tuab. Nws suav nrog kev sib xyaw ua ke ntawm cov khoom, suav nrog fluidity, cohesion, thiab tuav dej. Cov yam ntxwv cuam tshuam rau kev ua haujlwm muaj xws li dej cov ntsiab lus, dej-cement ratio, xuab zeb piv, thiab lwm yam xws li cement hom, aggregate tej yam kev mob, lub sij hawm, kub, thiab admixtures.

Cov kev cai thiab cov lus pom zoo

Cov qauv rau kev poob qis feem ntau tsis meej, vim tsis muaj cov cai muab cov qauv nruj tab sis cov lus pom zoo. Qhov no yog vim muaj tej yam xws li kev tsim kho qhov chaw, kev siv zog ntxiv, kev nyab xeeb, thiab txoj kev tsim kho muaj feem cuam tshuam rau qhov kev poob qis.

Lub hauv paus ntsiab lus tseem ceeb yog kom txo qis qis kom ntau li ntau tau thaum ua kom muaj kev tsim kho thiab molding. Kev poob qis ntau dhau tuaj yeem ua rau muaj teeb meem, xws li txo cov pob zeb ua kom muaj zog, nyuaj rau kev ua tiav cov compaction txaus nrog vibrators, thiab kev sib cais los yog voids hauv cov pob zeb.

Raws li tau hais los saum no, kev poob qis kuj raug txwv los ntawm kev tsim kho cov txheej txheem thiab cov chaw tshwj xeeb. Piv txwv li, qhov poob qis yuav cuam tshuam kev tsim kho thaum cuam tshuam nrog kev txhawb nqa siab, qhov kub thiab txias, kev thauj mus los ntev, lossis cov twj tso kua mis. Yog li ntawd, kev poob qis yuav tsum tau hloov kho raws li cov xwm txheej ntawm qhov chaw los tiv thaiv kev tsim kho qeeb lossis teeb meem zoo.

Tej yam cuam tshuam rau pob zeb slump

1. Kev cuam tshuam ntawm cov khoom siv raw

Cov dej noo ntawm cov xuab zeb ntxuav los ntawm cov dej ntws feem ntau tsis ruaj khov vim qhov sib txawv ntawm lub sijhawm cia thiab cov khoom siv. Thaum cov khoom sib xyaw ntxhib feem ntau pom muaj cov dej noo ruaj khov, kev hloov pauv tuaj yeem tshwm sim, tshwj xeeb tshaj yog nyob rau hauv qhov chaw qhib tom qab los nag. Cov kev hloov pauv no cuam tshuam rau qhov nqus dej ntawm cov khoom sib xyaw thaum sib xyaw, ua rau muaj kev hloov pauv hauv cov pob zeb tawg.

2. Kev cuam tshuam ntawm kev siv tshuab thiab sijhawm sib xyaw

Kev sib xyaw ntev ntev ua rau cov dej nqus ntawm cov khoom sib xyaw ua ke, txo cov dej dawb hauv cov pob zeb sib xyaw thiab ua rau poob qis. Kev ua yuam kev hauv kev ntsuas ntawm cov khoom siv sib xyaw kuj tuaj yeem ua rau poob qis. Cov khoom sib xyaw ua ke raug suav thiab hloov kho los ntawm kev sim sib xyaw, yog li kev ntsuas tsis raug ntawm cov khoom siv tuaj yeem hloov kho qhov chaw tshwj xeeb ntawm cov ntaub ntawv, ua rau muaj kev cuam tshuam ntau dua rau lub sijhawm poob.

3. Kev cuam tshuam ntawm cov khoom siv thauj mus los

Kev thauj mus los ntev thiab sij hawm rau pob zeb hauv kev sib xyaw cov tsheb thauj khoom tuaj yeem ua rau poob qis vim muaj tshuaj lom neeg, dej evaporation, thiab kev nqus tag nrho. Tsis tas li ntawd, mortar poob thaum lub sij hawm kev thauj mus los nrog txoj siv sia conveyors lossis chutes tseem ua rau kev poob qis.

4. Kev cuam tshuam ntawm Pouring ceev

Thaum lub sij hawm ua vaj tse, kev ncua sij hawm ntawm kev xa cov pob zeb mus rau qhov chaw casting ua rau poob qis vim muaj tshuaj lom neeg, dej evaporation, thiab kev nqus tag nrho. Thaum cov pob zeb raug rau ib puag ncig, xws li ntawm txoj siv conveyors, nws qhov chaw nyob rau hauv kev sib cuag nrog cov xwm txheej sab nraud nce, ua kom cov dej evaporation thiab ua rau poob qis tshaj plaws. Kev ntsuas qhia tau hais tias, ntawm qhov ntsuas kub ntawm ib puag ncig 25 degree, poob poob ntawm qhov chaw tuaj yeem ncav cuag li 4 cm hauv 30 feeb.

5. Kev cuam tshuam ntawm lub sij hawm nchuav

Lub sij hawm ntawm qhob pouring ho muaj feem xyuam rau slump poob. Kev ywg dej thaum sawv ntxov thiab yav tsaus ntuj muaj qhov cuam tshuam tsawg heev vim qhov kub thiab txias qis dua thiab cov dej evaporation qeeb. Txawm li cas los xij, thaum nruab hnub thiab yav tav su muaj kev poob qis dua vim tias qhov kub thiab txias dua thiab dej nrawm dua. Kev poob dej sai dua deteriorates fluidity thiab cohesion, cuam tshuam qhov zoo ntawm pob zeb.