Ụbọchị nbipute: 19, Septemba 2022
Retarder bụ admixture nke nwere ike igbochi hydration nke ciment ma mee ka oge mgbanwe nke ngwakọta si na rọba gaa na steeti siri ike. Ya mere, enwere ike iji ya na ihe azụmahịa iji meziwanye njigide slump nke ihe. Ọ dị mkpa maka kọmpụta azụmahịa. ihe admixture.
N'ezie, ọrụ nke retarders dị nnọọ ukwuu karịa imeziwanye plasticity nke kọmpụta azụmahịa.
(1) Ihe ka ọtụtụ n'ime ndị na-eme ihe na-emeghachi ihe na-arụ ọrụ plasticizing, ụfọdụ ndị na-emeghachi ihe na-enwe mmetụta na-ebelata mmiri karịa nke ihe ndị na-emepụta ihe na-ejikarị eme ihe. Nnwale egosiwo na mmetụta na-ebelata mmiri nke sodium gluconate a na-ejikarị eme ihe bụ ọtụtụ ugboro karịa nke superplasticizers dabeere na naphthalene a na-ejikarị eme ihe. ghọtara. N'oge a na-ewu ụlọ okpomọkụ dị elu, na-abawanye dose nke sodium gluconate, ọnụ ahịa ihe owuwu ahụ agaghị abawanye, n'ihi na enwere ike ibelata dose nke onye na-ebelata mmiri nke kwekọrọ na ya.
N'ezie, ọrụ nke retarders dị nnọọ ukwuu karịa imeziwanye plasticity nke kọmpụta azụmahịa.
(1) Ihe ka ọtụtụ n'ime ndị na-eme ihe na-emeghachi ihe na-arụ ọrụ plasticizing, ụfọdụ ndị na-emeghachi ihe na-enwe mmetụta na-ebelata mmiri karịa nke ihe ndị na-emepụta ihe na-ejikarị eme ihe. Nnwale egosiwo na mmetụta na-ebelata mmiri nke sodium gluconate a na-ejikarị eme ihe bụ ọtụtụ ugboro karịa nke superplasticizers dabeere na naphthalene a na-ejikarị eme ihe. ghọtara. N'oge a na-ewu ụlọ okpomọkụ dị elu, na-abawanye dose nke sodium gluconate, ọnụ ahịa ihe owuwu ahụ agaghị abawanye, n'ihi na enwere ike ibelata dose nke onye na-ebelata mmiri nke kwekọrọ na ya.
Ọ bụghị ihe amamihe dị na ya iji retarder gabiga ókè na-ewu ụlọ ahịa. Oke ojiji nke retarder na ihe ga-ọ bụghị nanị na-emetụta mmalite ike mmepe nke ihe, ma na-emetụta na-ewu ọganihu. N'ihi ọnọdụ plastik nke dị ogologo oge, a ga-ekpuchi ya na ifufe na anyanwụ na ikuku, na mmiri dị n'elu ihe dị n'elu ga-emetụta ya. Ọnụ ọgụgụ dị ukwuu nke evaporation na-eme ka mmiri na-efunahụ n'elu ihe ahụ, na-eme ka micro-cracks dịkwuo ukwuu. Ka mmiri na-efunahụ na-abawanye, mgbawa ahụ na-etolite n'ime omimi, ọkwa mmiri nke mmiri dị na pores na-adaba, nrụgide na-adịghị mma nke a na-emepụta ji nwayọọ nwayọọ na-abawanye, na nkwụsị nke na-akpata ike na-eme ka ihe ahụ na-adaba n'ihi ụkọ mmiri.
Concrete na steeti rọba ogologo oge ga-eme ka mbelata ọbara ọgbụgba na nrụrụ na-ezighi ezi n'etiti mkpokọta na ihe cimentious. Dị ka ule na-egosi, plastic shrinkage nke ihe na a plastic ala ruo ogologo oge nwere ike iru 1%, nke nwere mmetụta dị ukwuu na àgwà nke ihe.
Oge nzipu: Sep-19-2022
