Konkire ndi chinthu chachikulu chopangidwa ndi anthu. Kutuluka kwa konkire kwayamba kusintha m'mbiri ya zomangamanga za anthu. Kugwiritsa ntchito konkriti admixtures ndikusintha kwakukulu pakupanga konkriti.
zomera wapanga kupanga zinthu zomangira konkire kusuntha kwa msewu wa mafakitale ndi kasungidwe. Izi zimayikanso patsogolo zofunika kwambiri pakuwongolera kwabwino kwa konkriti, zomwe zimapangitsa kuti pakhale kusintha kwabwino kwa konkriti m'zaka zaposachedwa. Pa nthawi yomweyo, chifukwa otsika mlingo luso kulamulira khalidwe mu zomera ena konkire okonzeka kusakaniza, wabweretsa zoopsa zobisika kwa khalidwe polojekiti, ndipo ngakhale anaonekera. Ngozi yaukadaulo yomwe sinakumanepo nayo kwazaka zopitilira 20 yadzetsa kuwonongeka kwakukulu kwachuma.
Zomwe zimayambitsa kusagwirizana pakati pa ma admixtures ndi simenti:
Kuchita kwa konkire kumadalira osati pa ntchito ya zipangizo zomwe zimapangidwira, komanso kusinthasintha pakati pa zipangizo ndi chiŵerengero cha kusakaniza konkire. Ma Admixtures (ochepetsera madzi) sagwirizana ndi simenti, ndiye kuti, zosakaniza sizisintha kwambiri ntchito ya simenti, kutayika kwa konkire kumakhala kwakukulu kwambiri kapena konkriti ndikothamanga kwambiri, ndipo ngakhale ming'alu imatha kuchitika. m'mamembala a konkire.
Monga gawo lachisanu la konkire, admixture amawerengera pang'ono, koma ali ndi chikoka chachikulu pa ntchito ya konkire, yomwe imatha kusintha kwambiri kugwa kwa konkire ndikusintha nthawi ya coagulation, potero kuwongolera ntchito yomanga konkire kapena kupulumutsa ndalama. . Ma hydration reaction ya simenti imafuna madzi ochepera 25% a simenti, koma simenti ikakumana ndi madzi, ipanga mawonekedwe opindika kuti amangire madziwo. Kuwonjezera admixture akhoza directional adsorption pamwamba pa simenti particles, kotero kuti pamwamba pa particles simenti ali ndi mlandu womwewo, amene analekanitsidwa chifukwa cha repulsion tingati potero kumasula madzi atakulungidwa ndi simenti flocculation dongosolo, kotero kuti madzi ochulukirapo amatha kukhala nawo pakuchita kwa hydration. , kusintha ntchito. Kukula kwa adsorption ya simenti particles kuti admixture ndi imfa ya zotsatira za admixture kumasonyeza kusinthasintha kwa admixture kwa simenti.
Vuto losagwirizana pakati pa admixtures ndi simenti ndi vuto lomwe limadetsa nkhawa ndi mutu kwa opanga onse ogulitsa konkire. Vuto likachitika, pamapeto pake limatsutsidwa chifukwa cha kuphatikiza. Kusagwirizana pakati pa admixture ndi simenti kumayambitsidwa ndi kusakaniza komweko. Zinthu zamtundu ndi mankhwala, koma chifukwa chachikulu nthawi zambiri chimagwirizana ndi zinthu monga simenti ndi zosakaniza, kaya ndi wothandizira kuchepetsa madzi, superplasticizer ya nayiloni kapena m'badwo wachitatu wa polycarboxylic acid-based superplasticizer.
Nthawi yotumiza: Jul-19-2022
