Dab tsi yog qhov kev txheeb xyuas ntawm cov khoom siv purity silica fume?
High-purity silica fume yog ib yam ntawm cov khoom siv tau zoo heev, uas tuaj yeem txhim kho lub zog, permeability, te kuj thiab durability ntawm pob zeb. Cov yam ntxwv ntawm silica fume qhob tau nyiam, thiab silica fume qhob tau siv dav hauv kev txuag dej thiab kev tsim hluav taws xob, kev tsim vaj tsev, kev tsim vaj tsev, choj engineering.
Dab tsi yog qhov muaj zog cuam tshuam ntawm durability ntawm siab purity silica fume?
Lub durability ntawm pob zeb muaj xws li pob zeb te tiv thaiv, permeability, tshuaj yaig tsis kam, tsis kam rau steel yaig, cuam tshuam tsis kam, thiab lwm yam, uas tsuas yog cuam tshuam cov nyhuv ntawm pob zeb te tiv thaiv, permeability thiab tshuaj yaig kuj.
(i) Kev tiv thaiv txias: thaum silica fume cov ntsiab lus tsawg dua, qhov txias tsis kam ntawm silica fume qhob yog qhov zoo ib yam li cov pob zeb zoo tib yam, thiab yog tias cov ntsiab lus silica fume ntau dua 15%, qhov txias kuj yuav raug txo. Los ntawm ntau qhov kev sim, qhov kev pom no yog qhov tseeb tseeb. Qhov laj thawj tseem ceeb yog tias thaum silicon ntau dua 15%, cov pob zeb nthuav dav ntxiv, cov txheeb ze elasticity coefficient txo qis, lub zog compressive txo qis, thiab cov yam ntxwv sab hauv ntawm cov pob zeb ntawm thaj chaw tshwj xeeb yog me me, thiab qhov sib txawv coefficient yog. loj.
II) impermeability: vim lub me me silica fume hais, 20 ~ 100 lub sij hawm me dua cov cement hais, tuaj yeem sau cov voids hauv nruab nrab ntawm cov pob zeb ua ke, kom cov pob zeb ntom ntom, tib lub sijhawm, qhov thib ob hydration ntawm silica fume, cov khoom tshiab thaiv cov pob zeb infiltration channel, yog li cov silica fume qhob impermeability muaj zog, thiab cov permeability ntawm cov pob zeb nrog qhov nce ntawm gelatin ratio.
(iii) chemical erosion resistance: hauv cov pob zeb sib xyaw nrog silica fume tuaj yeem txo Ca (OH) 2 cov ntsiab lus, txhim kho qhov ntom ntawm cov pob zeb, txhim kho cov kua qaub tsis muaj zog, tab sis tsis tuaj yeem siv rau hauv cov kua qaub muaj zog lossis qhov tob ntawm cov tsis muaj zog acid yog siab. Qhob CSH decomposes nyob rau hauv acids, yog li nws kuj yog resistant rau ntsev corrosion, tshwj xeeb tshaj yog chloride ntsev. Txo tus nqi ntawm kev thauj mus los ntawm cov teeb meem ions thiab txo cov khoom ntawm soluble Ca (OH) 2 thiab Calcium Alumina (3 CAO 3 CASO 4 32H2) tsub kom qhov tshwm sim ntawm hydrated calcium silicate crystals.
Raws li cov hlau silicon yog cov khoom siv tawv thiab tsis yooj yim, cov khoom seem hauv cov txheej txheem sib tsoo tsis tuaj yeem tswj tau zoo, kev sib tsoo loj heev, cov khoom siv khib nyiab loj, cov nqi tsim khoom yog siab, cov khoom me me tsis ua raws li tus qauv, thiab cov khoom yuav tsis sib tw.
Peb tuaj yeem kho cov khoom;
Raws li koj qhov loj me, cov duab thiab lwm yam kev xav tau.
Peb tuaj yeem xa cov qauv dawb dawb;
Yog tias koj xav paub tus nqi lossis lwm yam ntaub ntawv, thovtiv tauj peb.
Peb muaj 30 xyoo ntawm kev paub hauv kev lag luam metallurgy.
