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
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
