Concrete bụ isi ihe mmadụ mepụtara. Mpụta nke kọnkịtị amalitela mgbanwe na akụkọ ihe mere eme nke ụlọ mmadụ. Ngwa nke ihe admixtures bụ nnukwu mmụba na mmepụta ihe na-emepụta ihe na-emepụta ihe na-emepụta ihe
osisi emewo ka mmepụta nke ihe owuwu ihe na-aga n'ihu n'okporo ụzọ nke mmepụta ihe na nchekwa. Nke a na-etinyekwa n'ihu ihe ndị ọzọ chọrọ na njikwa mma nke mmepụta ihe, na-eme ka ọganihu zuru oke nke ihe dị mma na afọ ndị na-adịbeghị anya. N'otu oge ahụ, n'ihi na ala larịị nke àgwà akara technology na ụfọdụ ihe njikere mix osisi, o wetara zoro ezo ize ndụ na oru ngo àgwà, na ọbụna pụtara. Ihe mberede ogo injinia nke a na-ahụbeghị n'ime ihe karịrị afọ 20 akpatala nnukwu mfu akụ na ụba.
Ihe ndị bụ isi na-akpata enweghị ndakọrịta n'etiti admixtures na ciment:
Ịrụ ọrụ nke ihe na-adabere ọ bụghị nanị na ọrụ nke ihe ndị na-emepụta ihe, kamakwa na ngbanwe dị n'etiti ihe ndị dị na ihe na-ejikọta ọnụ. Admixtures (mmiri reducers) na-adịghị dakọtara na ciment, ya bụ, na admixtures adịghị budata mma na-arụ ọrụ arụmọrụ nke ciment, slump ọnwụ nke ihe dị oke ibu ma ọ bụ ihe bụ oke ngwa ngwa ntọala, na ọbụna cracks na-yikarịrị ime. na ihe structural òtù.
Dị ka akụkụ nke ise nke ihe, admixture na-agụ maka obere akụkụ, ma ọ nwere mmetụta dị ukwuu na arụmọrụ nke ihe, nke nwere ike imeziwanye slump nke ihe ma gbanwee oge coagulation, si otú ahụ meziwanye arụmọrụ nke ihe owuwu ihe ma ọ bụ ịzọpụta ụgwọ. . Mmeghachi omume hydration nke ciment na-achọ ihe na-erughị 25% nke mmiri nke ciment uka, ma mgbe ciment na-ezute mmiri, ọ ga-etolite a flocculation usoro kechie mmiri na ya. Mgbakwunye nke admixture nwere ike iduzi adsorption n'elu akụkụ ciment, nke mere na elu nke ciment ahụ nwere otu ụgwọ, nke a na-ekewa n'ihi mmetụta na-asọ oyi, si otú ahụ na-ahapụ mmiri ọbọp site ciment flocculation Ọdịdị, otú ahụ. na mmiri ka ukwuu nwere ike itinye aka na mmeghachi omume hydration. , melite ọrụ. Ọnụ ọgụgụ nke mgbasa ozi nke cement cement na ntinye aka na nkwụsị nke mmetụta nke ntinye na-egosipụta ngbanwe nke ntinye na ciment.
Nsogbu nke enweghị nkwekọrịta n'etiti admixtures na ciment bụ nsogbu na-echegbu onwe ya na isi ọwụwa maka ndị na-emepụta ihe niile na-ere ahịa. Mgbe nsogbu ahụ mechara, a na-ata ya ụta maka admixture. Ihe na-adịghị mma n'etiti admixture na ciment na-akpata site na ntinye onwe ya. Ihe na-akpata àgwà na chemical mejupụtara, ma isi ihe kpatara na-ejikarị ihe ndị dị ka ciment na admixtures, ma ọ bụ nkịtị mmiri na-ebelata ihe, naịlọn dabeere superplasticizer ma ọ bụ nke atọ polycarboxylic acid dabeere superplasticizer ga-apụta.
Oge nzipu: Jul-19-2022
