Tsiku Lotumiza: 19, Sep, 2022
Retarder ndi chophatikizika chomwe chingalepheretse hydration ya simenti ndikutalikitsa nthawi yosinthika kuchokera ku pulasitiki kupita ku zovuta. Chifukwa chake, atha kugwiritsidwa ntchito mu konkriti yamalonda kuti apititse patsogolo kusungika kwa konkriti. Ndiwofunika kwambiri pa konkriti yamalonda. zosakaniza zosakaniza.
M'malo mwake, ntchito ya obwezeretsa ndi yochulukirapo kuposa kukonza pulasitiki ya konkriti yamalonda.
(1) Ma retarders ambiri amakhala ndi ntchito inayake yopangira pulasitiki, ndipo zoletsa zina zimakhala ndi mphamvu yochepetsera madzi kuposa zida zomwe zimagwiritsidwa ntchito kwambiri. Mayeso awonetsa kuti kuchepetsa madzi kwa sodium gluconate yomwe imagwiritsidwa ntchito kwambiri ndi kangapo kuposa ya naphthalene-based superplasticizers. kuzindikiridwa. Pakumanga kutentha kwakukulu, onjezerani mlingo wa sodium gluconate, mtengo womanga sudzawonjezeka, chifukwa mlingo wa wothandizira kuchepetsa madzi ukhoza kuchepetsedwa kwambiri.
M'malo mwake, ntchito ya obwezeretsa ndi yochulukirapo kuposa kukonza pulasitiki ya konkriti yamalonda.
(1) Ma retarders ambiri amakhala ndi ntchito inayake yopangira pulasitiki, ndipo zoletsa zina zimakhala ndi mphamvu yochepetsera madzi kuposa zida zomwe zimagwiritsidwa ntchito kwambiri. Mayeso awonetsa kuti kuchepetsa madzi kwa sodium gluconate yomwe imagwiritsidwa ntchito kwambiri ndi kangapo kuposa ya naphthalene-based superplasticizers. kuzindikiridwa. Pakumanga kutentha kwakukulu, onjezerani mlingo wa sodium gluconate, mtengo womanga sudzawonjezeka, chifukwa mlingo wa wothandizira kuchepetsa madzi ukhoza kuchepetsedwa kwambiri.
Kugwiritsa ntchito kwambiri retarder pakupanga konkriti yamalonda sikoyenera. Kugwiritsa ntchito kwambiri retarder mu konkire sikungakhudze kukula kwamphamvu koyambirira kwa konkire, komanso kumakhudzanso ntchito yomanga. Chifukwa cha pulasitiki ya nthawi yayitali ya konkire, idzawonekera ku mphepo ndi dzuwa mumlengalenga, ndipo madzi pamtunda wa konkire adzakhudzidwa. Kuchuluka kwa nthunzi kumawonjezera kutayika kwa madzi pamwamba pa konkire, zomwe zimapangitsa kuti pakhale ming'alu yaying'ono. Pamene kutayika kwa madzi kumawonjezeka, ming'alu imakula mpaka kuya, madzi amadzimadzi mu pores a konkire amatsika, kupanikizika koipa komwe kumapangidwa pang'onopang'ono kumawonjezeka, ndipo zotsatira zake zimachepa Mphamvu imapangitsa kuti konkire iwonongeke chifukwa cha kutaya madzi.
Konkire mu pulasitiki boma kwa nthawi yaitali kuchititsa kuti magazi akhazikike ndi mapindikidwe osagwirizana pakati aggregates ndi cementitious zipangizo. Malinga ndi mayesero, shrinkage ya pulasitiki ya konkire mu pulasitiki ya pulasitiki kwa nthawi yayitali imatha kufika 1%, yomwe imakhudza kwambiri khalidwe la konkire.
Nthawi yotumiza: Sep-19-2022
