Dab tsi yog pob zeb accelerator?
Nov 13, 2023
Dab tsi yog pob zeb accelerator?
Concrete accelerator: Ib qho kev sib xyaw ntxiv rau cov pob zeb uas tuaj yeem teem caij sai thiab ua kom cov pob zeb tawv. Lub ntsiab hom yog inorganic ntsev thiab organic tshuaj. Qhov ntau npaum ntawm cov hmoov nplej tsuas yog suav rau 2% mus rau 3% ntawm cov cement cov ntsiab lus hauv cov pob zeb, tab sis nws tuaj yeem ua rau cov pob zeb pib hauv 5 feeb, thiab tus neeg sawv cev nrawm tuaj yeem teem sijhawm li ntawm 12 feeb. Yuav kom ua tiav lub hom phiaj ntawm kev ua kom nrawm nrawm ntawm cov pob zeb hauv kev kho thaum muaj xwm txheej ceev lossis qhov tunnels. Nws yog ib qho indispensable additive nyob rau hauv lub shotcrete txoj kev tsim kho. Lawv lub luag haujlwm yog txhawm rau txhawm rau txhawm rau hydration thiab hardening ntawm cov cement thiab tsim kom muaj zog txaus nyob rau lub sijhawm luv luv kom ua tau raws li cov cai ntawm kev tsim kho tshwj xeeb.
Dab tsi yog kev ceev faj rau kev siv pob zeb accelerator? Kev ceev faj rau kev siv cov pob zeb accelerating tus neeg sawv cev 1. Tsis txhob ntxiv nws thaum cov khoom sib xyaw. Vim tias pob zeb thiab xuab zeb muaj cov dej ntau, tus neeg sawv cev nrawm nrawm nqus dej hauv lub sijhawm luv luv thiab decomposes nws cov khoom siv ceev ceev thaum tsis txau, cuam tshuam rau lub sijhawm teeb tsa thiab txo cov pob zeb zoo. Lub zog yuav ua rau muaj kev cuam tshuam tsis zoo ntawm cov pob zeb txau. 2. Ua ntej siv, kev ntsuas kev hloov pauv ntawm qhov kev pom zoo ntawm cov cement siv hauv kev tsim kho thiab tus neeg sawv cev no yuav tsum tau ua. 3. Ua ntej siv, nws raug nquahu kom ntxiv cov kua accelerating tus neeg sawv cev ntawm qhov hluav taws xob ntawm lub tshuab dav hlau. Kev siv dej ntawm cov pob zeb yuav tsum tau txiav tawm ntawm cov dej qhia los ntawm tus neeg sawv cev nrawm. 4. Tus nqi ntawm tus neeg sawv cev nrawm tuaj yeem tswj tau los ntawm lub ntsuas dej ntws los yog ntsuas dej precision. 5. Cement uas tau tas sij hawm siv tsis tau, thiab cov cement uas tsis ua raws li lub teb chaws tus qauv yuav siv tsis tau. Tus neeg sawv cev nrawm nrawm yuav tsum tau muab khaws cia kom zoo los tiv thaiv nws los ntawm clumping thiab ua tsis tiav vim ya raws.
Types of concrete accelerating setting agents 1. Aluminum-oxygen clinker accelerating setting agent Aluminum-oxygen clinker accelerating setting agent uses alumina-oxygen clinker as the main component and can be divided into alumina-oxygen clinker, carbonate series and composite sulfoaluminate series . The main components of alumina clinker and carbonate accelerator are sodium aluminate, sodium carbonate or potassium carbonate and quicklime. The main disadvantage of this type of accelerator is its high alkali content, which has a greater impact on the later strength of concrete. 2. Water glass accelerating setting agent The main component of water glass accelerating setting agent is water glass (sodium silicate). The single water glass component is too viscous to spray, so inorganic salts (such as potassium bistriate to reduce viscosity, triethanolamine for early strength) need to be added to reduce viscosity, improve fluidity, and increase early strength. Its parameters are generally 8% to 15% of the cement mass. 3. Aluminate liquid accelerator Aluminate liquid accelerator is widely used in concrete projects. It can be used alone or in combination with hydroxide or carbonate. There are two types of aluminate liquid accelerators: sodium aluminate and potassium aluminate. This type of accelerating setting agent has the advantages of less dosage and rapid early strength growth, but the final strength decreases greatly, some reaching 30%~50%, and its pH value is very high (>13), yog li nws yog corrosive ntau dua. muaj zog. 4. New inorganic low-alkali accelerating setting agents New inorganic low-alkali accelerating setting agents yog tag nrho cov hmoov thiab muaj cov yam ntxwv ntawm cov alkali qis los yog tsis muaj alkali, tsis muaj kev cuam tshuam rau lub zog ntawm cov pob zeb, cov khoom siv raw yooj yim, thiab cov txheej txheem tsim khoom yooj yim. Nws yog siv rau qhuav shotcrete, haum rau kev kho nrog me me ntawm kev ua haujlwm thiab cov xwm txheej uas qhov kev thauj mus los ntev thiab muaj kev cuam tshuam los ntawm qee lub sijhawm. 5. Cov kua alkali-dawb accelerators tshiab kua alkali-dawb accelerators yuav muab faib ua organic accelerators thiab inorganic kua accelerators raws li lawv lub ntsiab Cheebtsam. Inorganic neutral ntsev kua alkali-dawb accelerators nrog tus nqi nruab nrab thiab kev ua tau zoo heev tau nyiam cov neeg tuaj saib thiab tau pib txhawb thiab siv hauv tsev thiab txawv teb chaws. Feem ntau ntawm cov accelerators no siv aluminium compounds ua lub ntsiab tivthaiv, uas sawv cev rau txoj kev loj hlob ntawm alkali-dawb thiab liquefied accelerators. Los ntawm qhov kev xav ntawm cov khoom tseem ceeb, hom kev ua kom nrawm no tuaj yeem muab faib ua ob pawg: ib qho yog aluminium hydroxyl series; Lwm qhov yog aluminium sulfate series. 6. Waterproof ceev-setting tus neeg saib xyuas Engineering xyaum tau ua pov thawj tias txhaj tshuaj tiv thaiv npaj nrog cov neeg sawv cev ceev ceev muaj teeb meem ntawm shrinkage thiab cracking. Nws tsuas tuaj yeem ua lub luag haujlwm txhawb nqa tab sis tsis tuaj yeem tiv thaiv tawg thiab seepage. Yuav kom daws tau qhov tsis txaus ntawm kev txhaj tshuaj tua kab mob no, kuv lub teb chaws tau ua tiav ob hom kev ntsuas dej nrawm nrawm (FSA). Tus neeg saib xyuas qhov chaw nrawm no muaj cov yam ntxwv ntawm cov neeg ua haujlwm nrawm nrawm thiab tuaj yeem ua rau cov tshuaj tua kab mob tsis muaj zog lossis micro-expansion zog. Ua lub luag haujlwm ntawm kev txhawb nqa, tawg tiv thaiv thiab tiv thaiv seepage.
Cov yam ntxwv ntawm cov cement accelerator: 1. Cement accelerator tsis muaj kev puas tsuaj rau cov cement nws tus kheej, thiab nws tseem yuav ua rau lub sijhawm siv cov cement ntau dua. 2. Thaum ntxov solidification, cement accelerator yuav ua rau kom cov cement hardness. 3. Cov cement uas siv tus neeg sawv cev nrawm nrawm yuav pib ua kom khov tsis pub dhau 5 feeb ntawm kev txau, thiab yuav ua kom tiav hauv 10 feeb. 4. Cement accelerator tseem yuav tiv thaiv cov cement ntawm shrinking thiab txhim kho lub peev xwm tiv thaiv kev nkag ntawm cov cement. 5. Cov cement siv cov cement accelerator yuav muaj viscosity ntau dua. 6. Cement accelerator tsis muaj teeb meem rau tib neeg lub cev nws tus kheej, thiab tsis muaj corrosive cuam tshuam rau cov hlau tuav siv hauv qhov project. 7. Tus nqi ntawm cov cement accelerator yog tus nqi qis.
