Izongezo zeConcrete eziKhala | Ii-Agents eziFoaming eziSebenza ngokuPhezulu kwiSellula Concrete
Xa kuziwa kwikhonkrithi, sonke siyazi ukuba amanzi abalulekile ukudala umxube osebenzayo. Kodwa, ngamanye amaxesha umxube kufuneka usebenze ngamanzi amancinci kunento efunekayo kuyilo lomxube wekhonkrithi osemgangathweni ukuze kuhlangatyezwane neenkcukacha okanye kwiimfuno zeprojekthi ezithile njengokugalela iintsika ezinde.. Kulapho isinciphisi samanzi sekhonkrithi (ekwabizwa ngokuba yi-plasticizer) inokunceda.
Abanciphisi bamanzi liqela leekhemikhali ezongezwa kwimixube yekhonkrithi ukuvumela ukusetyenziswa kwamanzi aphantsi ukuya kwi-samente ratio ngaphandle kokuchaphazela kakubi amandla kunye nokugqiba.. Zisetyenziswa kwiintlobo ngeentlobo zezicelo zokwakha kubandakanywa ikhonkrithi eninzi, prestressing intsimbi kunye needekhi zebhulorho.
Imixube eqhelekileyo yokunciphisa amanzi ziimveliso ezisezantsi eziqhele ukwenziwa ngee-lignosulfonates., i-hydroxycarboxylic acids okanye iicarbohydrates. Ngokuqhelekileyo bayakwazi ukunciphisa umthamo wamanzi wekhonkrithi ngo 5 ukuya 10% kuluhlu lwe-slump ye-3-to-6 intshi kwaye kufuneka ihambelane ne-ASTM C494 Uhlobo A (imixube yokunciphisa amanzi).
Imixube yokunciphisa amanzi akuluhlu oluphezulu, zikwabizwa ngokuba zii-superplasticizers, bayakwazi ukunyusa ukuthotywa kwekhonkrithi ukusuka kwi-5 ukuya kwi-intshi ezi-8 kwaye kufuneka bahlangabezane nokucaciswa kwe-ASTMC C494 Uhlobo F (imixube yokunciphisa amanzi akuluhlu oluphezulu). Eli qela lihlala lisetyenziswa kwiiprojekthi ezizodwa ezifana neziseko ezinzulu okanye izinto ze-precast apho kufuneka i-slump ephezulu.
Eyona ndlela iphambili esebenza ngayo le mixube kukusebenzisa i-electrostatic repulsion. Xa imixube yekhonkrithi idibana namanzi, imirhumo yombane eyahlukileyo kumasuntswana esamente atsala enye kwenye ibangela ukuba adityane okanye adibane. Izinciphisi zamanzi ngokusisiseko zinciphisa ezi ntlawulo ukuze onke amasuntswana esamente abe nentlawulo efanayo aze agxothisane., ezivumela ukuba zihlakazwe ngcono kuyo yonke ikhonkrithi. Oku kuthintela i-agglomeration kwaye kwandisa ukuhamba kwekhonkrithi okanye ukudilika.