Cov txheej txheem:
- Dab tsi ua rau alkali silica cov tshuaj tiv thaiv?
- YPuas silica react nrog alkali?
- Cov tshuaj tiv thaiv alkali silica tshwm sim li cas hauv pob zeb?
- Vim li cas alkali silica cov tshuaj tiv thaiv tsim kev puas tsuaj rau pob zeb?
Video: Dab tsi yog alkali silica cov tshuaj tiv thaiv?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Cov tshuaj tiv thaiv alkali-silica, feem ntau hu ua "kev mob qog noj ntshav", yog cov tshuaj tiv thaiv o uas tshwm sim dhau sijhawm hauv cov pob zeb ntawm cov alkaline cement paste thiab cov reactive amorphous silica pom nyob rau hauv ntau yam sib sau ua ke, muab txaus. noo noo.
Dab tsi ua rau alkali silica cov tshuaj tiv thaiv?
Ua rau alkali-silica cov tshuaj tiv thaiv
ASR yog tshwm sim los ntawm cov tshuaj tiv thaiv ntawm hydroxyl ions hauv alkaline cement pore tov nyob rau hauv cov pob zeb thiab cov ntaub ntawv reactive ntawm silica nyob rau hauv cov aggregate (xws li: chert, quartzite, opal, strained quartz crystals).
YPuas silica react nrog alkali?
Alkali-silica cov tshuaj tiv thaiv (ASR) yog ntawm kev txhawj xeeb ntxiv vim tias cov khoom sib xyaw uas muaj cov khoom siv silica muaj ntau dua. Nyob rau hauv ASR, aggregates uas muaj qee cov ntaub ntawv ntawm silica yuav hnov mob nrog alkali hydroxide hauv pob zeb los tsim cov gel uas swells raws li nws adsorbs dej los ntawm ib puag ncig cov cement paste lossis ib puag ncig.
Cov tshuaj tiv thaiv alkali silica tshwm sim li cas hauv pob zeb?
Qhov laj thawj ntawm ASR yog cov tshuaj tiv thaiv nruab nrab ntawm cov alkaline cement's hydroxyl ions thiab qee qhov sib sau ua ke cov ntaub ntawv ntawm silicaQhov no tsim cov hygroscopic gel uas nthuav dav rau kev nqus dej, imposing. siab rau cov pob zeb ib puag ncig thiab ua rau nws tsis muaj zog nyob rau hauv ib txoj kev zoo ib yam li kev ua kom khov-thaw.
Vim li cas alkali silica cov tshuaj tiv thaiv tsim kev puas tsuaj rau pob zeb?
Nws ua kom nthuav dav sodium lossis potassium nplua nuj (alkali) silica gel uas muaj peev xwm nqus tau cov dej noo ntxiv thiab nthuav dav. Thaum no expansive gel kiag li puv lub pore system nyob rau hauv lub pob zeb nws exerts ntau tensile stresses (1, 2, 3, 4). Qhov tshwm sim yog hnyav tawg ntawm cov pob zeb.
Pom zoo:
Dab tsi yog qhov txawv ntawm cov tshuaj tiv thaiv thiab tshuaj tiv thaiv?
Raws li nouns qhov txawv ntawm antitype thiab hom yog hais tias antitype yog ib yam dab tsi uas yog cim los yog sawv cev los ntawm ib homthaum hom yog ib pab pawg raws li cov yam ntxwv sib koom; ib hoob . Antitype txhais li cas? 1a:
Cov tshuaj tiv thaiv puas tiv thaiv kab mob?
Cov ntaub ntawv tshiab kawg qhia tau tias kev txhaj tshuaj tsis yog tiv thaiv tib neeg cov tshuaj tiv thaiv xwb, nws txo qis txoj hauv kev uas lawv tuaj yeem kis tus kabmob mus rau lwm tus. Cov tshuaj tiv thaiv COVID-19 puas tiv thaiv kev sib kis?
Puas yog cov tshuaj tiv thaiv kab mob sib txuas tau suav tias yog kev tiv thaiv kab mob?
Antibody drug conjugates (ADCs) yog ib hom tshuaj tiv thaiv kab mob. Lawv yog tsim los ntawm peb yam: monoclonal antibody (mAb) thiab cytotoxic payload ua los ntawm cov kws khomob kws khomob, uas txuas nrog ua ke siv cov tshuaj sib txuas . Puas yog tshuaj tiv thaiv kab mob tib yam li kev tiv thaiv kab mob?
Puas yog cov tshuaj tiv thaiv kab mob tiv thaiv kab mob ua rau lupus?
Antinuclear cov tshuaj tiv thaiv yog autoantibodies - cov tshuaj tiv thaiv kab mob uas tsom rau cov proteins ib txwm nyob hauv lub hauv paus ntawm lub cell. Qhov no dhau los ua qhov tseem ceeb hauv kev kho mob thaum ANAs teeb liab lub cevpib tsom nws tus kheej, uas tuaj yeem ua rau cov kab mob autoimmune, suav nrog lupus, Sjogren's syndrome, thiab cov kab mob sib xyaw ua ke .
Cov neeg mob tiv thaiv kab mob yuav tsum tau txais cov tshuaj tiv thaiv?
Vim li cas CDC thiaj pom zoo tias cov neeg uas muaj kev tiv thaiv kab mob tiv thaiv kab mob tau txais koob tshuaj mRNA COVID-19 ntxiv los ntxiv rau 2-dose thawj koob tshuaj tiv thaiv kab mob mRNA COVID-19? Cov neeg uas muaj kev tiv thaiv kab mob los yog cov neeg siv tshuaj tiv thaiv kab mob yog nyob ntawm muaj kev pheej hmoo ntau rau tus kab mob COVID-19 hnyav .
