Txiv qaub-pozzolan MAAs: ntau lawm thiab kev siv

Pozzolan MAAs khoom yog ib tug hmoov daim ntawv nrog losis tswvyim dabtsi zog, nws yog raws li clinker yog tam sim no nrog rau ntau yam additives. Nyhav gains yas qauv rau kev sib cuag nrog dej thiab solidifies raws li qhov kom qhuav.

ntau lawm

Thaum tshwj xeeb cov nroj tsuag ua los ntawm txiv qaub-pozzolan MAAs, zus tau tej cov uas yuav tsum tau ib tug txheej txheem ntawm ib tug tag nrho cov kev voj voog. Tsis zoo li cov muaj chaw yog hais tias lawv muaj ib tug compartment rau sib tsoo yog siv rau kev sib tsoo thiab kom qhuav additives. Lawv ua raws li tej yam ntuj tso mineral tshuaj - gliezh, diatomite, tseem tau mus siv by-khoom ntawm lub zog ntau lawm.

Ib tug plurality ntxiv tshuaj muaj nyob rau hauv tej khoom, raws li ib tug pozzolan xis mas. Muaj pes tsawg leeg thiab kev faib ua feem ntawm cov khoom xyaw feem xyuam rau txoj kev khiav hauj lwm cov yam ntxwv. Yuav kom hloov cov solidification lub sij hawm thaum lub sij hawm sib tsoo ntawm gypsum ntxiv, tus nqi ntawd yuav tsum tsis muaj ntau tshaj li 3% ntawm tag nrho cov ceeb thawj.

qauv

Tag nrho cov hniav sib tsoo, yog tus nrov tshaj plaws txoj kev raug txiv qaub-pozzolana MAAs, muaj ib tug yus feature nyob rau hauv daim ntawv ntawm cov sib tsoo lub clinker nrog gypsum thiab mineral active ntsiab nyob rau hauv tshwj xeeb multi zeb. Ua ntej cov khoom xyaw yog crushed thiab coj mus rau qhov yuav tsum tau av noo theem nyob rau hauv lub ziab nruas. Nws yog ib nqi sau cia hais tias ua tus piv ntawm kev sib koom additives txog cov nqi ntawm cov khoom.

Txiv qaub-pozzolana MAAs solidification txheej txheem yog rhiab rau kub hloov. Thaum kub txog li 14 degrees lub sib tov twb yus muaj los ntawm ib tug qeeb solidification. Cov txheej txheem xyaum nres thaum lub ambient kub yog 5 degrees. Vim hais tias ntawm no zoo heev complicates kev siv ntawm cov khoom nyob rau hauv lub txias rau lub caij nyob rau hauv lub qhib qhov chaw.

Nyob rau tib lub pozzolan MAAs hlob sai npaum li cas sov dua thiab txawm ntau dua tshaj li niaj zaus Portland MAAs. Yuav kom nce lub kev kawm ntawv ntawm manufactured Cheebtsam, lawv yuav tsum tau raug mus ntxiv thaum tshav kub kub kev kho mob ntawm ib tug kub nyob rau hauv lub chav 80-90 degrees.

Zoo thiab tsis zoo

Pozzolan MAAs, uas cov khoom pub rau tsim thaum lub sij hawm solidification tshuaj xws li calcium hydrosilicate hydroaluminate thiab differing me nyhuv dua cov tsim nyob rau hauv cov pa MAAs muab ntau dua kuj rau cov teebmeem ntawm saline thiab cov dej tshiab. Cov qhov zoo nws muaj nqis ntsoov teev hauv qab no:

• pozzolan MAAs yog tsiag ntawv los ntawm tsim ntawm tsawg tej kab nrib pleb;
• ib theem siab ntawm adhesion rau lub pob zeb ua qhov cuab lub zog hais;
• yooj yim tuav;
• zoo heev tsevneeg yam ntxwv;
• Lub pozzolanic sib tov ntaub ntawv ib tug ntau dua kom muaj nuj nqis ntawm qhob los yog mortar nrog tib tau ntawm cov ntaub ntawv thiab lwm yam ntawm mixtures.

Tab sis nws tsis yog tsis muaj drawbacks:

• qhov yuav tsum tau siv ntau tshaj ntawm cov gauging dej;
• heev cia txo cov kev ua ntawm cov tshuaj muaj.

Yuav ua li cas koj yuav tsum paub

Yog tsis muaj xis mas tsis ua tej yam lub tsev project, thaum Russia yog ib tug thawj coj nyob rau hauv zus tau tej cov no cov ntaub ntawv uas. Tej yam nws variations nyob rau hauv lawv cov tshuaj qauv tsim yuav mus rau hauv qeb ntawm silicates, lub additive yog tam sim no nyob rau hauv muaj pes tsawg leeg nyob rau hauv daim ntawv ntawm cov pob zeb ntais dioxide. Raws li ib lub hauv paus ntawm MAAs clinker protrudes uas yog constituted ntawm txiv qaub thiab av nplaum, yav tas los firing. Diatomaceous lub ntiaj teb uas ua li ib impurity. Tsim thaum lub sij hawm lawm thiab siv cov MAAs hmoov av los ntawm heev raug ua ntsws txoj kev loj hlob thiab nyob rau hauv uas tsis tshua muaj mob - pneumoconiosis, muab qhov tshaj silicon dioxide txheej, uas muaj ib tug pozzolanic xis mas.

Silicosis yog ib tug loj heev hauv daim ntawv ntawm pneumoconiosis thiab feem ntau lug mas yuav kis tau thaum lub sij hawm lub active kev loj hlob ntawm engineering thiab tsuas kev lag luam vim lub fact tias cov ua hauj lwm muaj pes tsawg leeg feem xyuam rau ib tug loj tus naj npawb ntawm quartz hmoov av. Tus kab mob yog feem ntau nyob rau hauv cov neeg muaj feem xyuam rau cov kev ntawm granite, txoj kev loj hlob ntawm ntau, siv tej hub thiab refractory tebchaw.

Lwm yam txoj kev ntau lawm

Pozzolan MAAs, uas nws cov khoom kuj yog nyob ntawm seb tus txheej txheem, yuav ua tsis tau tsuas yog nyob rau hauv cov nroj tsuag tab sis kuj nyob rau hauv kev tsim kho chaw lawv tus kheej siv lub sib tsoo-qhuav chaw. Lawv qhuav mineral tshuaj, yog av thiab tov nrog rau tej, nws yog tseem tau simultaneous sib tsoo ntawm cov khoom xyaw. Qhov no thiaj li tsheb congestion, thauj xwb clinker thiab mineral ntsiab lawv tus kheej yog ua nyob rau hauv kev tsim kho thaj tsam. Cov qhov zoo ntawm xws li ib tug txheej txheem yuav tsum tau muab sau tseg tau hloov cov muaj pes tsawg leeg ntawm freshly ua cov ntaub ntawv nrog fillers. Tab sis kev siv tshwj xeeb chaw yog tsis txhaum xwb nyob rau hauv loj tagnrho siv.

Pozzolan MAAs: siv

Cov feem ntau lug siv cov ntaub ntawv uas kis tau nyob rau hauv cov creation ntawm kev reinforced thiab qhob khoom underground thiab underwater siv, uas muab kev koom tes nrog sulfate thiab tshiab dej. Yuav siv tau rau kua thiab cov yam ntxwv hais, kev kawm uas yog yus muaj los ntawm theem ntawm cov av noo. Nws tseem yog kev siv nyob rau hauv hydraulic engineering Siv tsim vnutrimassivnogo qhob.

Siv nyob rau hauv pob zeb lug terrestrial tas vim tsis muaj te kuj yam ntxwv, nyob rau hauv particular nrog lub proviso cua solidification. Qhov no yog raws li nyob rau hauv ceev ceev kom qhuav, uas muaj peev xwm kom tsis txhob tus txheej txheem ntawm solidification thiab ua rau teeb meem loj shrinkage. Tsis tas li ntawd undesirable creation ntawm cov yam ntxwv hais ntawm pozzolan MAAs, yog hais tias lawv yog siv nyob rau hauv periodic yaj thiab khov, kom qhuav thiab co.

lub dag lub zog

Pozzolan MAAs muaj pes tsawg leeg, zog, daim ntaub ntawv uas muab yus lub dag lub zog ntawm prefabricated hais, yog check, nws yog tshwm sim los ntawm tus nqi ntawm calcium silicate tsim. Rau ib cov ntaub ntawv uas yus muaj los ntawm ib tug ntev nce nyob rau hauv lub dag lub zog vim yuav txo tau ntawm tag nrho cov net ceeb thawj ntawm lub MAAs, tag nrho cov khoom nyob rau hauv cov tswv yim ntxiv cov khoom xyaw. Accelerating hardening sau tseg hydrate los ntawm reacting lub calcium oxide thiab active silica, lub resulting khoom nreg zog zoo xws li cov mus rau lwm cov MAAs grout. Yog li ntawd, ib tug ntev nyob rau hauv ib lub noo ib puag ncig.

Dej thov

Pozzolan MAAs, uas yog raws li nyob rau hauv diatomite thiab Tripoli, yog yus muaj los ntawm ntau zog dej coob, ua rau qeeb qeeb lub sij hawm poob ntawm zaum kawg solidification. Yuav kom tsim lub MAAs slurry yuav tsum tau npaum li cas ntawm cov kua kuj yuav tsub kom nyob rau hauv lub mineral active ntsiab. Nws yuav txo tau yog cai nyob rau hauv lub xub ntiag ntawm additives nyob rau hauv nyob tus yeees ntawm cov tuff thiab txoj kev khiav.

Qhov nce nyob rau hauv cov dej thov yog undesirable vim hais tias nws muaj txhawb rau ib tug ntau dua tau ntawm no hom ntawm cement piv rau lwm yam. Qhov sib ntxiv ntawm yoov tshauv tsis hloov tus nqi ntawm cov kua yuav tsum tau rau nws. Nws yuav tsum tau tov nrog ob lub pob zeb mix thiab nrog nws tus kheej xis mas. Qhov zoo tshaj ntawm cov khoom no tsis txo txawm yog hais tias tus tshauv yuav hloov los ntawm ib feem.