Tsiku Lotumiza: 19, Dec, 2022

Superplasticizers amatha kuchepetsa kuchuluka kwa madzi omwe amagwiritsidwa ntchito posakaniza konkire ndi osachepera 10%, kapena kuonjezera kwambiri kuthamanga kwa konkire.Kwa masiku atatu a konkire, mphamvu ya 砼C30 imatha kuonjezedwa ndi 69 mpa, ndipo mphamvu ya konkire pamasiku 28 ikuwonjezeka mpaka 87 mpa.Ambiri ntchitosuperplasticizersmakamaka polyalkyl aryl sulfonates ndi melamine kuchepetsa madzi.

Zotsatira zasuperplasticizers pa ntchito konkriti makamaka motere:

1. Ponena za katundu wa konkire wosakaniza mwatsopano.Pakuchepetsa kwamadzi kwa superplasticizer, kukula kwa mamolekyu ndi mtundu wamtundu wochepetsera madzi womwe umagwiritsidwa ntchito uyeneranso kuganiziridwa.Kutuluka kwa mpweya wa mpweya wochepetsera madzi kumakhudzidwa ndi kugwedezeka kwapamwamba kwa njira yamadzimadzi.Kuchuluka kwamphamvu kwamphamvu kwapamtunda kumachepetsedwa, m'pamenenso zimawonekera kwambiri kuti mpweya wotulutsa magazi umatuluka.Pankhani ya nthawi yoyika konkire, naphthalene ndi melamine zimatha kupititsa patsogolo nthawi ya konkire, ndipo sulfamate superplasticizer imatha kuchepetsa nthawi yoyika.Ngakhale superplasticizer si chosinthika ndi simenti zosiyanasiyana, ntchitosuperplasticizers akhoza kuchepetsa kulekanitsa ndi kutuluka magazi zochitika.Kutsika kwa konkire kumatha kusinthidwa ndi kuwonjezera kwa superplasticizer.Nthawi yeniyeni yotsika komanso kuchuluka kwake kumatsimikiziridwa ndi magawo monga mtundu ndi kuchuluka kwa wochepetsera madzi omwe amagwiritsidwa ntchito.

2. Zotsatira za kuumitsa kwa konkire.Simenti yokhala ndi superplasticizer imatha kupititsa patsogolo kuchuluka kwa hydration.Kuponderezedwa kwa konkire ndi mphamvu yopindika kumawonjezeka.Superplasticizers kuchepetsanso kuchuluka kwa simenti mwa kusintha shrinkage mtengo wa konkire.Komabe, kusintha kwa mtengo wa telescopic nthawi zambiri sikudutsa mtengo wa 1X10-4.

3. Zotsatira za kulimba kwa konkire.The mkulu-mwachangu madzi kuchepetsa wothandizira bwino

imathandizira kuletsa kuzizira komanso kusungunuka kwa konkire chifukwa cha kuchuluka kwa madzi ochepetsa komanso kuwunika kuchuluka kwa mpweya wotuluka.Ndipo chochepetsera madzi chapamwamba kwambiri chimatha kupititsa patsogolo luso la konkire kukana dzimbiri la sulfuric acid.Kuyesera kwawonetsa kuti kukana kwa dzimbiri la sulfuric acid wa superplasticizer sikuli koyipa kuposa konkriti yopanda kanthu.

4. Chitetezo chotsutsana ndi dzimbiri chazitsulo zazitsulo.Konkire yokhala ndi madzi ochepetsera kwambiri amatha kulumikizana bwino ndi mipiringidzo yachitsulo, ndipo kumamatira kwachitsulo chowongoka ku konkriti 7D kumatha kukhala bwino kuchokera ku 1.2MPA kupita ku 8.5MPA.Kumamatira kwachitsulo chopindika ku konkriti 7D kumatha kuonjezedwa kuchokera ku 15MPA kupita ku 27.5MPA.The superplasticizer amathanso kuteteza bwino chitsulo mu konkire.