Ụbọchị nbipute:31,Ọkt,2022
Concrete admixturesejirila kọmpụta ihe fọrọ nke nta ka ọ bụrụ otu narị afọ dịka ngwaahịa. Ma malite n’oge ochie, n’ezie, ọ dịla anya ụmụ mmadụ maara na a na-eji ụfọdụ ihe mgbakwunye eme ihe simenti. Ihe ndekọ data ekwenyesiri ike na na 1885 ndị Europe amaworị na ndị na-achịkwa ike siri ike, dị ka lime na gypsum, na-agbakwunyere na kọmpụta. Na njedebe nke narị afọ nke 19, iji calcium chloride bụ ọnụma niile ma ka na-eji ya eme ihe taa. Ka ọ na-erule afọ 1895, a gbakwụnyela ihe ndọtị mmiri na ihe ndị na-emepụta ihe na-emepụta ihe n'ime ihe a na-eme n'ebe a na-adọba ihe n'okporo ụzọ, bụ nke mere ka ọ dị ogologo ndụ nke simenti.
Ebu ụzọ hụ ngwaahịa ụlọ ọrụ mmepụta ihe na 1910. Mgbe e mepụtara North America na United States n'afọ ndị 1930, pavement ahụ kwụsịrị ngwa ngwa n'ihi oke oyi. Iji mee ka mma nke pavement dị mma, a na-eji "vinsa resin" mee ka ọ dịkwuo ogologo oge. mmekọahụ. Ezi ngwaahịa nyocha sayensị bụ "Pozzolitn" onye na-ebelata mmiri mmiri (Pozzolitn), nke EW Scxiptrt nke MasterBuilder nke United States mere nyocha nke ọma ma mepụta ya na 1935, bụ nke kachasị nke lignosulfonate na mmiri mmiri na-ekpofu mmiri. Na 1937, United States nyere patent mbụ maka ndị na-ebelata mmiri na akụkọ ihe mere eme. Na 1954, nke mbụ ogbe nke ule ụkpụrụ makaihe admixturese chepụtara.
The ukara ojiji nkeihe admixturesna obodo m bụ na 1950s. N'oge ahụ, e webatara rosin saponified ikuku ikuku nke ndị ọkachamara sitere na Soviet Union mbụ mepụtara. Ejiri ya na Tianjin Tanggu New Port, Wuhan Yangtze River Bridge na Foziling Reservoir, wee nweta nsonaazụ ụfọdụ. Mgbe e mesịrị, plasticizers kọnkịtị na-eji pulp mkpofu mmiri mmiri si sulfite papermakers na na-ekpofu mmanụ aṅụ sitere na sugar ụlọ ọrụ dị ka eji akụrụngwa. Ojiji nke admixtures malitekwara ebe ahụ.
Mmepe na ngwa nkeihe admixturesnwere ogologo oge pụtara. Ike na-emepe emepe ma na-akwalite ngwa nkeihe admixturesbụ ụzọ dị mkpa iji kwalite ọganihu sayensị nke ụlọ ọrụ ihe owuwu.
N'ime usoro ihe owuwu nke ihe owuwu ihe owuwu, iji admixtures nwere ike imeziwanye gburugburu ebe obibi nke ọma, mee ka ojiji nke akụrụngwa dị iche iche rụọ ọrụ, belata ọrụ nke ndị ọrụ ihe owuwu dị mkpa, ma hụ na ọrụ ahụ dị mma. Na mgbakwunye, enwere ike iji ya na ọnọdụ ụfọdụ siri ike. Mezue ọrụ owuwu nke ọma na gburugburu ebe obibi.
The ihe admixture nwere ike budata ebelata mmezi oge mgbe owuwu nke oru ngo, si otú na-eme ka demulding ọsọ nke oru ngo, na-eme ka formwork tụgharịa ngwa ngwa, na nwere ịrịba ọsọ-elu mmetụta na-esote mkwado tensioning na ịkpacha osisi, na-eme ka. oge owuwu ihe owuwu dum. dị mkpụmkpụ nke ukwuu. N'otu oge ahụ, mgbakwunye nkeihe admixturesnwekwara ike imeziwanye ogo ọrụ kọmpụta ahụ nke ọma, ma melite ike ya, ịdịte aka ya, nguzogide ntu oyi na enweghị ike.
Ke adianade do, ọ nwere ike budata melite shrinkage nke ihe mgbe ọ bụ akọrọ ezuru na eruba Njirimara tupu solidification. Ọ bụrụ na ihe admixture na-eji n'ụzọ ziri ezi na-ewu oru ngo, na admixture na-emekarị agaghị enwe mmetụta ọ bụla na-ewu àgwà nke ihe, na Ọ nwekwara ike dị ukwuu ibelata ojiji nke ciment na dị iche iche inyeaka ihe n'okpuru premise nke ndị ọkà mmụta sayensị ojiji, na. Mbelata nke iji ihe inyeaka nke sitere na ciment na-eme ka ọ bụghị nanị na-azọpụta ndị mmadụ, ma na-echekwa ụgwọ ụlọ nke usoro ahụ, ma nwee mmetụta dị mma na nzọụkwụ ọzọ. Usoro tamping na troweling na-enye mma.
Oge nzipu: Ọktoba 31-2022
