Kev sib xyaw ntawm cov iav dej
Cov iav dej tau muab faib ua sodium dej iav thiab potassium dej iav, feem ntau hu ua Paohua alkali. Sodium dej iav yog cov tshuaj aqueous ntawm sodium silicate nrog cov qauv molecular ntawm Na2O.nSiO2 thiab K2O.nSiOz. Potassium dej iav yog aqueous tov ntawm poov tshuaj silicate nrog ib tug molecular mis ntawm K2O.nSiOz. Sodium dej iav feem ntau yog siv hauv engineering engineering. Potassium dej iav kuj tseem siv tau thaum cov kev cai engineering siab dua. Cov iav dej ntshiab zoo yog cov kua dej tsis muaj xim thiab pob tshab, soluble hauv dej. Thaum nws muaj impurities, nws yog daj ntseg daj los yog xiav-grey.
N nyob rau hauv cov mis molecular ntawm sodium dej iav yog hu ua lub modulus ntawm dej iav, uas sawv cev rau tus piv ntawm tus naj npawb ntawm molecules ntawm Na2O thiab SiO2, thiab yog ib qho tseem ceeb parameter. Qhov loj dua tus nqi n, qhov siab dua qhov viscosity thiab lub zog ntawm cov iav dej, tab sis qhov qis dua qhov solubility hauv dej. Thaum n yog ntau dua 3.0, nws tsuas yog yaj hauv dej kub xwb, uas ua rau muaj teeb meem rau kev siv. Qhov me dua tus nqi n, qhov qis dua qhov viscosity thiab lub zog ntawm cov iav dej, thiab qhov ntau soluble hauv dej. Yog li ntawd, feem ntau siv modulus n nyob rau hauv civil engineering yog 2.6 rau 2.8, uas yog yooj yim soluble nyob rau hauv dej thiab muaj zog siab. Yog tias koj xav kawm ntxiv txog cov tshuaj muaj pes tsawg leeg thiab cov tshuaj tiv thaiv ntawm cov iav dej, Otov muab cov khoom lag luam thiab cov kev pabcuam rau koj.
Kev siv dej iav grouting rau ntsaws thiab lwm yam kev siv
1. Qhov saum npoo ntawm cov khoom siv txhuam txhim kho cov huab cua tsis kam
Cov dej iav tshuaj txheej los yog cov ntaub ntawv impregnating tuaj yeem nkag mus rau hauv qhov khoob thiab qhov hws, thiab cov silica gel kho tau tuaj yeem thaiv cov kab capillary los txhim kho qhov ntom thiab lub zog ntawm cov khoom, yog li txhim kho huab cua tsis kam ntawm cov khoom. Cov iav dej yuav tsum tsis txhob siv los pleev xim los yog impregnate gypsum khoom. Cov iav reacts nrog gypsum los tsim sodium sulfate (Na2SO4), thiab siv lead ua nthuav dav hauv qhov hws ntawm cov khoom ua rau tawg thiab puas ntawm cov khoom gypsum.
2. Txhim kho cov av
Cov iav dej thiab cov tshuaj calcium chloride tau hloov pauv mus rau hauv av, thiab ob txoj kev daws teeb meem sai sai rau daim ntawv silica gel thiab calcium silicate gel, uas ua lub luag haujlwm ntawm cementing thiab sau qhov pores, txhim kho av lub zog thiab kev muaj peev xwm, thiab feem ntau yog siv rau hauv cov khoom siv. silt, xuab zeb thiab sau av. Lub hauv paus reinforcement yog hu ua ob-kua grouting.
3. Kev npaj ceev-ceev tus neeg saib xyuas waterproofing
Cov iav dej thiab ntau yam ntawm alum yog tsim los ua tus neeg saib xyuas dej kom nrawm rau kev kho thaum muaj xwm txheej ceev hauv zos xws li ntsaws thiab caulking. Multi-alum waterproofing agent coagulates sai, feem ntau nyob rau hauv ob peb feeb, thiab nws cov plaub-alum waterproofing tus neeg saib xyuas ntau tshaj 1 feeb, yog li nws yuav tsum tau siv rau ntawm qhov chaw tsim kho. Npaj siv.
Muaj plaub hom alums feem ntau siv nyob rau hauv ntau-alum dej tshuaj tua kab mob, xws li bile alum (tooj liab sulfate), liab alum (potassium dichromate K2Cr2O7), alum (tseem hu ua alum potassium aluminium sulfate), thiab ntshav alum.
4. Kev npaj cov kua qaub-resistant cementation, acid-resistant mortar thiab acid-resistant pob zeb
Acid-resistant cementitious dej iav thiab acid-resistant hmoov (feem ntau siv quartz hmoov) yog npaj, thiab ua ke nrog acid-resistant mortar thiab qhob qauv, lawv yog tsuas yog siv rau sulfuric acid pas dej ua ke nyob rau hauv engineering nrog acid-resistant yuav tsum tau.
5. Kev npaj cov cua sov-resistant cementitious, kub-resistant mortar thiab kub-resistant pob zeb
Dej iav cementing yog tsuas yog siv rau refractory masonry thiab kho, dej iav kub-resistant mortar thiab pob zeb yog tsuas yog siv rau blast furnace foundation thiab nws structural qhov chaw uas yuav tsum tau tshav kub.
6. Kev siv los tiv thaiv corrosion engineering
Hloov kho sodium silicate acid-resistant av nkos yog ib yam khoom tseem ceeb rau acid thiab corrosion kuj. Cov yam ntxwv tseem ceeb ntawm acid-resistant, kub-resistant, ntom thiab impermeable, tsis tshua muaj nqi, yooj yim rau siv. Sib tov rau hauv acid-resistant mortar, acid-resistant mortar thiab acid-resistant pob zeb. Nws yog ib qho khoom siv zoo tshaj plaws rau cov kua qaub cia tank, acid-resistant pem teb, thiab acid-resistant nto masonry rau cov txheej txheem los tiv thaiv corrosion engineering.
Seb dej iav tuaj yeem rub tau thiab ntsaws
Txij li thaum cov iav dej tau muab sib xyaw rau hauv cov cement slurry ua tus neeg sawv cev ceev hauv qee qhov haujlwm hauv lub hauv paus, nws tau ua tiav cov txiaj ntsig zoo ntawm kev ua kom cov cementation ntawm slurry thiab tswj nws qhov sib txawv, yog li cov txheej txheem grouting ntawm cement dej iav tau tsim. Yog li ntawd, dej iav yog dav siv rau grouting plugging. Nws yog ib qho khoom siv grouting plugging ntau heev.
