Concrete expansion agent piav qhia
Aug 15, 2024
Concrete Expanding Agents yog hom tshiab ntawm kev sib xyaw ua ke. Thaum ntxiv rau cov cement, lawv ua rau cov cement nthuav thaum lub sij hawm teeb tsa thiab cov txheej txheem hardening, yog li them nyiaj rau shrinkage, tsim kom muaj qee yam ntawm prestress, thiab ua tiav qhov khoob ntawm cov cement hais. Thaum lub sij hawm hydration txheej txheem, cov tshuaj lom neeg thiab cov tshuaj tiv thaiv thermodynamic ua rau cov cement poob rau hauv ntim, ua rau shrinkage tawg nyob rau hauv cov pob zeb ua vaj tse - ib qho teeb meem tseem ceeb hauv cov khoom ua vaj tse. Tshwj xeeb tshaj yog nyob rau hauv waterproofing tej yaam num xws li underground structures, hydraulic engineering, marine kev tsim kho, subways, tunnels, hydroelectric tej yaam num, ultra-ntev reinforced qhob vaj tse, thiab lwm yam grouting tej yaam num, structural cracking yuav ua rau loj tsis xws luag, ua rau kev siv ntawm expanding agents.
Classification los ntawm Composition:
- Calcium Sulfoaluminate Concrete Expanding Agents
- Calcium Oxide Concrete Expanding Agents
- Calcium Sulfoaluminate-Calcium Oxide Concrete Expanding Agents
- Magnesium Oxide Concrete Expanding Agents
- Composite Fiber Expanding Agents
Kev siv tshwj xeeb ntawm cov pob zeb nthuav dav:
Cov qauv hauv av:xws li subways, underground chaw nres tsheb, underground warehouses, tunnels, mines, civil tiv thaiv tej yaam num, foundation pits, thiab lwm yam.
Cov qauv dej:xws li cov pas dej da dej, cov pas dej da dej, cov dej yees, cov tso tsheb hlau luam, cov thawv loj, granaries, roj tank, warehouses hauv roob qhov tsua, thiab lwm yam.
High-strength txoj kev nto:pob zeb choj decks, culverts, thiab lwm yam.
Precast khoom:anchoring rau thav duab cov pob qij txha, cov yeeb nkab sib txuas, cov khoom siv rau cov khoom siv tom qab tensioned precast, backfilling rau cov pob qij txha tom qab, cov khoom siv magma grouting.
Cov khoom siv cement:self-stressing, prestressing, thiab steel-lub tes tsho prestressed qhob kav, pem teb slabs, kab, kab teeb, waterproof ru tsev panels, thiab lwm yam.
Tsis-shrinkage grouting:rau thauj tog rau nkoj bolts ntawm cov cuab yeej siv tshuab, hauv paus thiab pob zeb hauv paus.
Kev tiv thaiv mortar linings:rau cam khwb cia hlau kav, steel kav.
Self-waterproofing txhav ru tsev, anti-seepage mortar txheej, anti-moisture mortar txheej, thiab lwm yam.
High-strength, high-impermeability shafts, backfill qhob rau lub pas dej txiav-tawm phab ntsa,chaw ntau pob, sculptures hauv nroog, tsev cia puav pheej, tsev so, thiab lwm yam.
Keeb kwm kev loj hlob:
Xyoo 1936,Cov kws tshawb fawb Asmeskas tau siv ettringite-hom (piv txwv li, calcium sulfoaluminate) nthuav cov neeg ua haujlwm los tsim cov pob zeb rau tus kheej.
Xyoo 1958,A. Klein hauv Tebchaws Meskas tau ua tiav ib hom calcium sulfoaluminate cement, hu ua K-cement, thiab tau txais patent rau nthuav cov cement.
Xyoo 1970,Nyiv lub Tuam Txhab Onoda tau ua tiav kev tsim cov txiv qaub-based expanding agents, uas yog calcium oxide expanding agents.
Xyoo 1979,Yawg Wu Zhongwei tau luam tawm cov monograph "Shrinkage-Compensating Concrete," uas yog thawj zaug uas lub tswv yim ntawm shrinkage-compensating ua vaj tse tau tawm tswv yim nyob rau hauv Suav scientific zej zog.
Xyoo 1985,nyob rau hauv kev taw qhia ntawm Academician Wu Zhongwei, Tuam Tshoj Tsev Khoom Siv Tsev Kawm Ntawv tau ua tiav ntau yam qauv ntawm cov pob zeb nthuav dav, xws li UEA, AEA, thiab CEA.
Thaum xyoo 1990s,PK Mehta thiab lwm tus hauv Tebchaws Meskas tau thov ntxiv 5% MgO rau cov cement los daws qhov teeb meem ntawm qhov kub thiab txias sib txawv tawg hauv cov pob zeb loj, ua rau tsim cov magnesium oxide expanding agents.
Xyoo 2001,Tuam Tshoj thawj tus qauv kev lag luam cuam tshuam, JC476-2001 "Concrete Expanding Agents," tau ua tiav.
Xyoo 2009,lub teb chaws tus qauv GB23439-2009 "Concrete Expanding Agents" tau raug coj los siv.
Hauv xyoo 2011,Tuam Tshoj Tsev Khoom Siv Tsev Kawm Ntawv, koom tes nrog Wuhan Sanyuan Special Building Materials Co., Ltd., tsim FQY cov neeg ua haujlwm siab nthuav dav. Cov khoom no tau muab piv nrog cov khoom zoo sib xws los ntawm Nyij Pooj DENKA, qhia kev ua tau zoo tshaj plaws hauv txhua yam thiab tau txais kev lees paub kev lag luam.
