Pob Tawb: Cov Khoom, Cov Khoom Siv Ntxiv thiab Kev Tswj Xyuas Zoo

Pob zeb yog cov khoom siv dav siv los paub txog nws lub zog, durability, thiab versatility. Ntawm no yog cov khoom tseem ceeb ntawm cov pob zeb, cov khoom siv ntxiv uas siv los txhim kho cov khoom no, pom zoo rau qhov sib piv ntxiv, thiab kev tswj xyuas qhov zoo:

Cov khoom ntawm pob zeb:

1. Compressive Strength: Lub peev xwm ntawm pob zeb tiv thaiv axial loads, ntsuas hauv phaus ib square inch (psi) lossis megapascals (MPa).
2. Tensile Strength: Lub peev xwm ntawm pob zeb los tiv thaiv lub zog nruj, uas feem ntau qis dua lub zog compressive.
3. Durability: Pob zeb tsis kam rau huab cua, tshuaj tua kab mob, abrasion, thiab lwm yam ntaub ntawv ntawm deterioration nyob rau hauv lub sij hawm.
4. Kev ua haujlwm tau yooj yim: Qhov yooj yim uas cov pob zeb tuaj yeem sib xyaw, muab tso rau, compacted, thiab ua tiav kom tiav cov duab uas xav tau thiab ua tiav.
5. Ceev: Qhov loj ntawm ib chav tsev ntim ntawm pob zeb, uas cuam tshuam nws qhov hnyav thiab cov khoom siv.
6. Shrinkage thiab Creep: Kev hloov pauv hauv ntim thiab deformation nyob rau lub sijhawm vim ziab, kub hloov pauv, thiab cov khoom ntim ruaj khov.
7. Permeability: Pob zeb muaj peev xwm tiv thaiv cov dej, roj, thiab lwm yam khoom los ntawm nws qhov pores thiab capillaries.

Common Additives thiab lawv cov haujlwm:

1. Dej-txo cov neeg ua haujlwm (Superplasticizers): Txhim kho kev ua haujlwm thiab txo cov dej tsis muaj zog.
2. Air-Entraining Agents: Qhia cov tshuab cua tshuab ua npuas kom txhim kho khov-thaw tsis kam thiab ua haujlwm tau zoo.
3. Retarders: ncua sij hawm teem sijhawm kom tso cai rau kev thauj mus los ntev dua, tso chaw, thiab sijhawm ua tiav.
4. Accelerators: Ua kom lub sijhawm teem sijhawm, tshwj xeeb tshaj yog pab tau thaum huab cua txias.
5. Pozzolans (xws li Fly Ash, Silica Fume): Txhim kho lub zog, ua haujlwm ntev, thiab txo cov permeability los ntawm kev ua haujlwm nrog calcium hydroxide los tsim cov cementitious ntxiv.
6. Fibers (piv txwv li, Hlau, Synthetic): Txhim kho kev tawg, kev cuam tshuam, thiab lub zog tensile.
7. Corrosion Inhibitors: Tiv thaiv cov khoom siv dag zog tiv thaiv corrosion los ntawm chloride ions lossis carbonation.

Pom zoo Additive Ratios:

• Qhov sib piv tshwj xeeb ntawm cov additives nyob ntawm seb yam xws li cov khoom vaj khoom tsev xav tau, ib puag ncig, thiab qhov yuav tsum tau ua.
• Qhov sib piv feem ntau qhia raws li feem pua ​​​​ntawm cov cement hnyav lossis tag nrho cov pob zeb sib xyaw hnyav.
• Cov koob tshuaj yuav tsum tau txiav txim siab raws li kev kuaj sim, kev sim sib xyaw, thiab cov qauv kev ua haujlwm.

Kev Tswj Xyuas Zoo:

1. Kev Ntsuas Cov Khoom Siv: Ua cov kev ntsuam xyuas ntawm cov khoom siv raw (piv txwv li, aggregates, cement, additives) kom ua tau raws li cov qauv tsim nyog thiab cov lus qhia tshwj xeeb.
2. Batching thiab Mixing: Siv cov khoom hnyav thiab ntsuas kom raug rau cov khoom siv batch, thiab ua raws li cov txheej txheem sib xyaw kom ua tau zoo thiab sib xws.
3. Kev Ntsuam Xyuas Kev Ua Haujlwm thiab Kev Ua Haujlwm Zoo: Ua cov kev ntsuas poob qis, ntsuas dej ntws, lossis ntsuas rheological los ntsuas kev ua haujlwm thiab kho qhov sib xyaw ua ke raws li xav tau.
4. Curing: Siv cov txheej txheem kho kom zoo (xws li, moist curing, curing compounds, curing membranes) kom tsis txhob ziab ntxov ntxov thiab txhawb dej.
5. Kev Ntsuas Lub Zog: Saib xyuas kev txhim kho lub zog ntawm cov qauv kev sim (piv txwv li, kev ntsuas lub zog compressive) ntawm ntau lub hnub nyoog kom paub tseeb tias ua raws li cov qauv tsim.
6. Quality Assurance/Quality Control (QA/QC) Programs: Tsim QA/QC cov kev pab cuam uas suav nrog kev tshuaj xyuas tsis tu ncua, cov ntaub ntawv, thiab kev kho kom raug kom zoo ib yam thiab ua raws li cov lus qhia tshwj xeeb.

Los ntawm kev nkag siab txog cov khoom ntawm cov pob zeb, xaiv cov khoom tsim nyog, tswj cov khoom sib ntxiv, thiab siv cov kev tswj xyuas kom zoo, cov neeg tsim khoom tuaj yeem tsim cov pob zeb ua haujlwm zoo uas ua tau raws li qhov yuav tsum tau ua thiab txhim kho cov kav ntev thiab ntev ntawm cov qauv.