Li-additives tsa Konkreite tse bobebe | Li-Agents tse Foaming tse Phahameng ka ho Fetisisa bakeng sa Konkreite ea Cellular
Konkreite e bobebe ke mofuta oa thepa e bobebe e bobebe e entsoeng ka ho kenyelletsa ntho e phoroselang ea lik'hemik'hale ka har'a slurry ea samente le ho sebelisa karabelo ea eona ea lik'hemik'hale ho hlahisa khase., kahoo ho hlahisa palo e kholo ea lipululana tse nyane ka har'a seretse., Konkreite e bobebe joalo ka konkreite ea foam e na le conductivity e phahameng ea mocheso, le hoja e sa kenelle mollong, e lebisang keketsehong ea butle-butle ea botenya ba moralo oa boto ea insulation, bonolo ho hlahisa moropa o senang letho, lesela le tebileng la insulation le tla oa, ho phunyeha hoa kantle, seepage, oela le mathata a mang a boleng.
E le ntho e thata ka ho fetisisa, airgel e na le conductivity ea mocheso e ka tlase ho 0.013 W/(m•K), e leng e 'ngoe ea lisebelisoa tse nang le mocheso o tlaase ka ho fetisisa oa mocheso sebakeng sa mocheso o phahameng oa mocheso. Airgel ka boeona ha e chese ebile e na le khanyetso e ntle ea mollo.
Mokhoa oa ho lokisa konkreite e bobebe ke e latelang: 1. Kenya metsi, le airgel, fiber, se fokotsang metsi, etc. Hasanya ka ho lekana, ebe u eketsa samente, hlohlelletsa 2 min ~ 3 min ho ea ho junifomo, qetellong eketsa coagulant, ntho e phophomang makweba, hlohlelletsa 20 s~30 s, etsa peista;(3) mohato 2 e entsoeng ka peista ka har'a hlobo, Ema 4 h~6 h ho tlosa hlobo, 24 h ka mor'a ho khaola.
1. Tšusumetso ea litaba tsa airgel ho bongata bo hlakileng ba konkreite e bobebe
Boima ba stacking ea airgel bo tlase haholo, 'me ho eketsoa ha motsoako o tobileng ho tla fokotsa haholo letsoalo le hlakileng la boto ea inorganic foaming insulation., e lebisang ho theoheng ho hoholo ha matla a khatello le thepa e 'ngoe., bophahamo ba foam bo fihla 1 m3 kapa e phahame hanyane ho feta 1 m3, ha tekanyetso ea airgel e ntse e eketseha butle-butle, butle-butle fokotsa litekanyetso tsa sethethefatsi sa foaming, netefatsa bophahamo ba foam bo tsitsitseng, kahoo segokanyipalo se bonahalang se fetola tokiso e nyane haholo ea konkreite e bobebe, ka keketseho ea tekanyetso ea airgel kantle, ka li-cubic meter tsa konkreite e bobebe e eketseha hanyane, boima ba phofo ba lokisetsa ho ea bobebe konkreite bonahalang segokanyipalo e boetse e eketseha hanyenyane.
2.Phello ea litaba tsa airgel ho conductivity ea mocheso oa konkreite e bobebe
Ka keketseho ea litaba tsa airgel, conductivity ea mocheso ea konkreite e bobebe pele e fokotseha ebe e eketseha. Ha litaba tsa airgel li 120 L/m3, conductivity ea mocheso e fihla 0.056 W/(m•K) bonyane.Ka ho eketseha butle-butle ha dikahare tsa airgel, boima ba stacking ea airgel bo tlase haholo. E le ho etsa bonnete ba hore ha e le hantle e lumellana foaming bophahamo, lintho tse ka hare ho foaming agent li fokotseha butle-butle, 'me porosity ea konkreite e bobebe e fokotseha butle-butle.Ha litaba tsa airgel li le tlaase, phokotso ea litaba tsa moemeli oa foaming e fokotsa palo ea li-pores tse hlahisoang ka konkreite e bobebe, e ntlafatsa botsitso ba porosity ea konkreite e bobebe, mme e eketsa sekhahla sa eona sa porosity se koetsoeng. Ka nako e tšoanang, Ho eketsoa ha airgel ho fokotsa bongata ba thepa ea lebota la pore, e ntlafatsa ts'ebetso ea eona ea ho kenya mocheso oa mocheso, 'me ka ho eketsehileng ho fokotsa conductivity ea mocheso.Ha litaba tsa airgel li ntse li eketseha, palo ea li-pores ka konkreite e bobebe e fokotseha haholo mme botenya ba lebota la pore boa eketseha. When the improvement of aerogel’s thermal insulation performance on pore wall is not better than the increase of thermal conductivity caused by the decrease of the number of pores, the thermal conductivity changes from reduction to increase.
3. Influence of aerogel content on water absorption of inorganic foam insulation board
Ka keketseho ea litaba tsa airgel, the water absorption rate of lightweight concrete decreases gradually. The water absorption rate of lightweight concrete without aerogel is 9.5%, while that of lightweight concrete with aerogel content of 200 L/m3 is 7.4%, which decreases by more than 20%.Analysis of its reasons include the following three aspects: (1) aerogel has a strong hydrophobicity, reduce the water absorption of materials;(2) after the addition of aerogel, the content of foaming agent decreases, e ntlafatsang botsitso ba porosity ea konkreite e bobebe le ho eketsa sekhahla sa eona sa obturation.(3) ka keketseho ea litaba tsa airgel, palo ea likoti tsa konkreite tse bobebe li fokotsehile, botenya ba lerako la lesoba bo ile ba eketseha, e ka thibela mongobo hantle ka har'a li-pores tse ka hare tsa konkreite tse bobebe.
4. Tšusumetso ea litaba tsa airgel holim'a matla a hatellang a boto ea inorganic foaming insulation
Ka keketseho ea litaba tsa airgel, matla a hatellang a konkreite e bobebe a qala a eketseha ebe a fokotseha. Ha litaba tsa airgel li 80 L/m3, matla a ho hatella a fihla boholo ba 0.60 MPa. Phetoho ea mekhoa ea matla a ho hatella e hlile e fapane le ea conductivity ea mocheso. Lintho tse ntle tsa matla a ho hatella li kenyelletsa: (1) ka mor'a ho eketsa airgel, the content of foaming agent decreases, ho ntlafatsa botsitso ba stomatal ea konkreite e bobebe, ho eketsa sekhahla sa eona sa obturation, le ho fokotsa sekhahla sa ho phunyeha le ho phunyeha ha lesoba.(2) ka keketseho ea litaba tsa airgel, palo ea li-pores tsa konkreite e bobebe e fokotseha 'me botenya ba lebota la pore boa eketseha.Mabaka a mabe a matla a ho hatella a kenyelletsa: (1) ho kenngoa ha airgel ho fokotsa bongata ba lisebelisoa tsa lerako la pore, ho fella ka ho fokotseha ha bokhoni ba ho beha thepa ea lerako la pore, le (2) ho kenngoa ha airgel ho lebisa keketseho ea tšebeliso ea metsi.Ha litaba tsa airgel li ne li le tlaase, lintlha tse ntle li phethile karolo e kholo mme matla a khatello a eketseha. Leha ho le joalo, ka keketseho ea litaba tsa airgel, tšusumetso ea lintlha tse sa thabiseng e ne e le kholo ho feta ea lintlha tse ntle 'me matla a fokotseha butle-butle.
Cie-China.org ke mofani ea ka sehloohong oa li-additives tsa konkreite ea foam e fanang ka konkreite e foqohang, superplasticizer,foam konkreite e matlafatsang bakeng sa konkreite e bobebe, Li-block tsa CLC. Haeba u batla ntho e phophomang, ka kopo ikutloe u lokolohile ho iteanye le rona.