Teeb meem nyob rau hauv daim ntawv thov ntawm polycarboxylic acid superplasticizer nyob rau hauv txoj kev loj

1. Yuav ua li cas rhiab heev ntawm polycarboxylic acid superplasticizers rau dej yuav txhim kho?

Nws tau raug tshaj tawm nyob rau hauv high-ceev tsheb ciav hlau los yog txoj kev loj tej yaam num uas cov polycarboxylic acid superplasticizers rhiab heev, ua rau cov dej cov ntsiab lus ntawm cov pob zeb hloov pauv los ntawm 2-3 kg ib cubic meter, ua rau muaj kev hloov pauv tseem ceeb hauv kev ua haujlwm xws li dhau los ua ib yam nkaus. dej los yog qhuav dhau, thiab sib cais hnyav. Thaum ua haujlwm nrog cov haujlwm uas lub superplasticizer qhia tau hais tias muaj kev nkag siab zoo rau cov dej, cov kev daws teeb meem twg tuaj yeem siv los ntawm kev xav ntawm superplasticizer?

2. Yuav ua li cas qhov teeb meem ntawm cov dej ntws tsis zoo hauv cov pob zeb yuav daws tau los ntawm qhov kev xav ntawm superplasticizers (cov khoom siv tshuaj lossis cov khoom sib xyaw)?

Nyob rau hauv ntau yam kev tsheb ciav hlau ceev los yog txoj kev loj, feem ntau tau tshaj tawm tias cov twj tso kua mis lossis cov dej hauv qab dej muaj cov dej ntws tsis zoo, tshwj xeeb tshaj yog thaum qhov poob qis dua los yog sib npaug li 200 hli, uas ua rau muaj qhov tsawg lossis tsis zoo txaus.

3. Yuav ua li cas khaws cov yas nyob rau lub sij hawm rau polycarboxylic acid superplasticizers yuav txhim kho?

Hauv kev kub ceev tsheb ciav hlau lossis txoj kev loj, kev ua haujlwm pib ntawm cov pob zeb feem ntau zoo heev (zoo cohesion, flowability, dej tuav, haum slump, thiab cua cov ntsiab lus), tab sis nws workability deteriorates tom qab ib tug tej lub sij hawm (30 los yog 60 feeb), nrog rau cov teeb meem xws li txo qis cohesion, kev tuav dej tsis zoo, thiab kev hloov pauv loj hauv huab cua.

4. Yuav daws cov teeb meem hauv kev ua tiav thiab tswj cov huab cua kom ruaj ntseg li cas?

Cov ntsiab lus ntawm cov pa hauv av tuaj yeem ua tiav tsis yooj yim: hauv kev tsheb ciav hlau ceev lossis txoj kev loj, kev tswj cov huab cua tsis pub dhau qhov txwv feem ntau yuav tsum tau ntxiv cov khoom siv huab cua nkag (piv txwv li, 0.5%{{4 }}% ​​ntawm K12). Kuj tseem muaj qhov poob tseem ceeb hauv cov ntsiab lus huab cua, qhov twg qee qhov haujlwm tuaj yeem pib nrog cov ntsiab lus ntawm huab cua tab sis poob ib qho nyiaj ntau tom qab 10 feeb, ib nrab teev, lossis ib teev, cuam tshuam rau lub xeev pob zeb. Tam sim no, nce qhov ntau npaum li cas ntawm thickening los yog cua-entraining agents tsis daws cov teeb meem tseem ceeb.

5. Yuav ua li cas qhov teeb meem adsorption ntawm superplasticizers tshwm sim los ntawm kev hloov pauv hauv cov av nkos hauv cov xuab zeb lossis gravel?

Kev hloov pauv hauv cov av nkos ntawm cov xuab zeb thiab pob zeb ua rau muaj feem cuam tshuam rau kev noj cov tshuaj superplasticizers thiab poob qis hauv pob zeb. Puas yog nws muaj peev xwm txhim kho cov av nkos polycarboxylic acid superplasticizer los tiv thaiv cov av nkos los daws cov teeb meem adsorption ntawm av nkos ntawm superplasticizer?

6. Yuav ua li cas rhiab superplasticizers rau hom thiab fineness ntawm xuab zeb?

Hauv kev tsheb ciav hlau ceev lossis txoj kev loj, feem ntau muaj kev hloov pauv loj hauv cov xuab zeb zoo, xws li hloov cov xaum xuab zeb, kev hloov ntawm cov xuab zeb fineness modulus, thiab hloov cov xuab zeb gradation. Yog hais tias lub superplasticizer tsis kho raws li, kev ua haujlwm ntawm cov pob zeb tuaj yeem hloov pauv tau nrog kev hloov pauv hauv cov xuab zeb zoo, cuam tshuam rau kev tsim kho. Yuav ua li cas hais txog qhov no los ntawm superplasticizer foundations? Piv txwv li, yog hais tias lub fineness modulus ntawm xuab zeb hloov los ntawm 2.40 mus rau 2.80, los yog yog hais tias muaj kev hloov nyob rau hauv cov xuab zeb gradation, tib lub superplasticizer yuav ua li cas kom ntseeg tau tias cov pob zeb ua hauj lwm raws li kev tsim kho?

7. Yuav ua li cas peb thiaj li ceeb toom rau qhov tsim nyog ntawm superplasticizers rau niaj hnub cement lossis ya tshauv?

Nrog rau kev tshwm sim tsis tu ncua ntawm cov thev naus laus zis, kev txhim kho tsis tu ncua ntawm cov khoom siv thev naus laus zis, nce kev xav tau ntawm cov khoom siv ua haujlwm siab, kev siv zog txo nqi, thiab kev siv ntau dua ntawm cov ntaub ntawv pov tseg nrog kev siv hluav taws xob tsawg thiab ib puag ncig, cov cement thiab yoov tshauv manufacturers maj mam hloov. lawv cov khoom 'cov khoom thiab siv ntau cov ntaub ntawv pov tseg thiab ntau yam additives. Qhov no tau ua rau txo qis kev sib raug zoo ntawm cov cement tam sim no los yog ya tshauv nrog cov superplasticizers uas twb muaj lawm (polycarboxylic acid superplasticizers), yuav tsum tau hloov tshiab rau polycarboxylic acid superplasticizers.

8. Dab tsi yog qhov teeb meem ntawm high viscosity nyob rau hauv high-strength pob zeb?

Hauv kev kub ceev tsheb ciav hlau lossis txoj kev loj, muaj ib qho teeb meem ntawm cov viscosity ntau dhau los yog hnyav hauv cov pob zeb muaj zog (C50 thiab siab dua), uas cuam tshuam rau kev ua haujlwm tsis zoo, xws li cov nqi qis qis, tsis yooj yim, thiab hnyav hnyav (ua rau nws. tsis tsim nyog rau kev tsim kho). Yuav ua li cas hais txog qhov no los ntawm superplasticizer standpoint? Puas muaj cov khoom tshiab zoo dua lossis cov ntaub ntawv sib xyaw ua ke?

9. Yuav ua li cas kom zoo dua ntawm cov pob zeb vaj tse?

Nrog rau txoj kev loj hlob sai ntawm kev tsheb ciav hlau thiab kev loj, Ministry of Railways, kev tsim kho vaj tse, lossis cov tub ceev xwm hauv nroog tau tsim cov kev cai nruj zuj zus ntawm cov qauv zoo ntawm cov pob zeb, xws li cov npuas npuas, cov pob qij txha, cov xim sib txawv, thiab cov npuas ntawm kab los yog piers.

10. Dab tsi yog qhov tshiab polycarboxylic acid superplasticizer auxiliary cov ntaub ntawv muaj?

Dab tsi tshiab, kev ua haujlwm siab polycarboxylic acid superplasticizer auxiliary cov ntaub ntawv tam sim no nyob rau hauv kev ua lag luam, thiab dab tsi yog lawv qhov zoo thiab qhov tsis zoo nrog rau kev xav txog kev siv? Qhov no suav nrog cov neeg ua haujlwm xws li viscosity reducers, viscosity enhancers, stabilizers, efficiency enhancers, thiab waterproofing agents, thiab lwm yam.

11. Yuav piav qhia txog kev hloov pauv ntawm pob zeb li cas?

Hauv qee qhov haujlwm, cov thawj coj ntawm lub hauv paus lossis cov chaw soj nstuam tau thov kom muaj "kev ntsuas qhov yooj yim" rau kev ua vaj tse. Qee qhov tau tshaj tawm tias qhov kev hloov pauv tsis zoo, qhia tau hais tias cov pob zeb yog nruj dhau, hnyav, tsis muaj elasticity, thiab ua pov thawj tsis zoo ntawm plasticity thiab slurry kev ua tau zoo. Yuav siv superplasticizers li cas los kho qhov yooj ntawm pob zeb? Tsis tas li ntawd, qhov ntsuas kev ua tau zoo no tuaj yeem ntsuas qhov tseeb lossis ntsuas li cas?

12. Yuav ua li cas txog qhov kub thiab txias ntawm superplasticizers?

Hauv cov haujlwm uas muaj qhov sib txawv ntawm nruab hnub hmo ntuj (xws li hauv Northeast Tuam Tshoj, thaj chaw ntug dej hiav txwv, lossis sab hnub poob), siv tib lub superplasticizer ua rau muaj kev hloov pauv loj hauv kev ua haujlwm ntawm nruab hnub thiab hmo ntuj. Yuav daws qhov teeb meem ntawm qhov kub thiab txias li cas los ntawm superplasticizer foundation?

13. Yuav ua li cas kev sib koom ua ke ntawm pob zeb yuav txhim kho?

Vim muaj kev txhim kho thev naus laus zis tas mus li, cov khoom siv khi hauv cov pob zeb sib xyaw yog txo qis. Nyob rau hauv ntau yam kev tsheb ciav hlau ceev lossis txoj kev loj, muaj teeb meem ntawm kev sib koom ua ke tsis zoo, kev sib cais, thiab kev pabcuam tsis txaus, tshwj xeeb tshaj yog nyob rau hauv cov twj tso kua mis lossis dej hauv qab dej, nrog rau kev hloov pauv tseem ceeb hauv kev sib koom ua ke vim cov khoom siv raw sib txawv (tshwj xeeb tshaj yog xuab zeb thiab pob zeb).