Abubuwan Kariyar Kankare Masu Sauƙi | Mahimman Ayyuka Masu Kumfa don Kankalin Salon salula
Tsarin tasiri na superplasticizer a kan kankare Properties
Superplasticizer ainihin nau'in kayan gini ne, a cikin amfani da kumfa da kumfa da sauran kumfa sol, kuma suna da halaye daban-daban da tsarin samuwar, ionic superplasticizer ne ke haifar da shi. Bayan ƙara superplasticizer a cikin kankare cakuda, superplasticizer zai adsorb a saman siminti barbashi. Gabaɗaya, game da 80% na superplasticizer za a adsorbed da siminti barbashi, ta yadda za su iya kula da yanayin tarawa na dogon lokaci ba tare da yaduwa ba. Lokacin da ba a ƙara superplasticizer ba, kankare zai sami adadin adadin iskar gas (game da 2%), kafa da girman kumfa ne m, kuma rabon bai yi daidai ba. Bayan ƙara superplasticizer zuwa kankare, Rarraba sigogi masu mahimmanci na iya kula da kyawawan kaddarorin kuma inganta aikin aiki na kankare, kamar ƙarfin ƙwanƙwasa na kankare. Bayan haka, ƙara superplasticizer a cikin kankare hadawa zai taimaka rage yawan ruwa a cikin kankare hadawa. Ƙananan kumfa sol da aka haifar za su taimaka cika ƙananan pores a cikin kankare, muhimmanci inganta anti-permeability na kankare, da kuma inganta sinadarai na rigakafin lalata da ƙarfin tsufa. Ana iya haɗa superplasticizer a cikin ƙaura na ruwa kyauta na kayan ciki, wanda ke taimakawa wajen rage matsa lamba na superplasticizer da haɓaka juriya na kankare zuwa sake zagayowar daskare mai maimaita.. Superplasticizer na iya rage saurin amsawar siminti a tsakiya da ƙarshen mataki, inganta ƙarfin siminti da haɓaka aikin haɓakawa. Saboda haka, lokacin hada kankare, ban da la'akari da yashi, dutse, siminti da sauran kayan al'ada, dace ƙari na wani adadin superplasticizer don inganta amfani da kankare yi.
1) Tasirin superplasticizer akan slump na sabo-sabo da kankare
A lokacin da nazarin workability da fluidity na kankare, Mahimmin mahimmin mahimmin mahimmin abu shine slump. Girman darajar, mafi kyau da fluidity na kankare. Asarar ƙulle-ƙulle tana nufin bambanci tsakanin ɓangarorin siminti da aka sake aunawa bayan wani takamaiman lokaci da faɗuwar farko.. Abubuwan da ke tasiri sun haɗa da siminti, jimlar halaye da ruwa-ciminti rabo, da dai sauransu. Nau'in superplasticizer kuma shine maɓalli mai tasiri. A farkon 30min, naphthalene jerin superplasticizer yana da matsakaicin asarar slump na kankare, lissafin kudi 60%, biye da melamine jerin superplasticizer wakili (30%) da polycarboxylic acid jerin superplasticizer (20%), wanda ya nuna cewa polycarboxylic acid jerin superplasticizer yana da mafi kyawun kariyar slump. Daga tsarin samuwarsa, sashen polycarboxylic acid superplasticizer a cikin siminti abu za a adsorbed a saman siminti, bisa ga trapezoidal hanya yana barin siminti kwayoyin polymer adsorption Layer kafa ta electrostatic repulsion mafi watsawa sakamako., inganta kwanciyar hankali, don haka kankare ƙara tsarin polycarboxylic acid bayan superplasticizer, na iya rage raguwar asara sosai.
(2) Tasirin superplasticizer akan ƙarfin matsi na simintin da aka haɗa sabo.
Ƙarfin siminti wanda ya ƙunshi nau'ikan superplasticizer daban-daban yana da tasiri daban-daban. Ta hanyar shafa superplasticizer, zai iya rage yawan haɗakar da ruwan kankare da ake amfani da shi na hadawa, inganta hydration digiri na siminti, inganta kankare kowane zamani (3 d, 7 d kuma 28 d) tsanani, na iya zama daga uku kunshi high dace superplasticizer na kankare matsawa ƙarfi sun muhimmanci fiye da na blank kankare matsawa ƙarfi., 3 d, 7 d, kuma 28 d Ƙarfin ƙarfin ƙarfi ya ƙaru kamar yadda 15%, 20%, kuma 30% bi da bi. Bayan haka, nau'in siminti tare da mafi girman ƙarfin matsawa a farkon matakin shine simintin da aka haɗe da polyhydroxy acid superplasticizer, kuma ƙimar ƙarfin ƙarfinsa kuma shine mafi girma bayan 28 kwanaki. Duk da haka, da kankare hada da naphthalene jerin superplasticizer yana da in mun gwada da low matsawa ƙarfi a farkon mataki, wanda ke nuni da cewa aikin sa na farko ba shi da kyau.
(3) Tasirin superplasticizer akan aikin fashewar farko na simintin da aka haɗa sabo
Halayen jiki da sinadarai za su faru tsakanin kankare tare da haɗaɗɗun abubuwa, siminti, da admixtures. Wani nau'in superplasticizer yana cikin siminti wanda wani nau'in wurin siminti ya haifar da ƙaramin faɗuwa, bayyana a cikin wani nau'in siminti duk da haka babban asara na iya bayyana, ba su wanzu don haka superplasticizer wanda ke da tasiri mai kyau ga kowane irin siminti. A cikin ainihin kimantawa na kankare ingancin, Manufofin kimantawa da aka saba amfani da su sun haɗa da raguwa da ƙarfi, amma yana da sauƙi don watsi da girman kwanciyar hankali na kankare, mai sauƙin haifar da fashewar raguwar wuri, na iya hanzarta fashewar kankare, tasiri dorewa da amincin tsarin ginin. Daga abubuwan da suka shafi farkon fashewar simintin, baya ga saurin iska da yanayin zafi, nau'in nau'in da adadin abin da ake hadawa suma abubuwa ne masu matukar muhimmanci.
Gwajin ya nuna cewa matsakaicin faɗin faɗuwa da yanki na siminti da aka samar da superplasticizer na tushen melamine shine mafi ƙanƙanta., a cikin abin da yankin tsaga ne kawai 76% na daidaitattun darajar polycarboxylic acid superplasticizer da 52% na daidai darajar naphthalene superplasticizer. Matsakaicin faɗin tsaga ya kusan kusan 40% na madaidaicin darajar polycarboxylic acid da naphthalene superplasticizer. A farkon fashe lokacin fashewa na kankare, tasirin admixture iri-iri ba shi da mahimmanci, wanda ke da alaƙa da abun ciki na admixture da sauran abubuwan.
(4) Tasirin superplasticizer akan dorewar simintin da aka haɗa sabo
Superplasticizer akan dorewa na kankare yana da tasiri mafi girma, yafi bayyana a matsayin: (1) tasirin kankare sanyi narke juriya. Saboda ƙaramin rabon siminti na ruwa, mafi kyawun juriya-narkewar kankare. Ta ƙara superplasticizer tare da tasirin kama iska, daskare-narke juriya na kankare yana inganta sosai. Ya kamata a sarrafa ƙarar shan iska da kusan 2%, kuma matsakaicin kada ya wuce 6%. In ba haka ba, ƙarfi da karko na kankare za su yi mummunan tasiri.
(2) tasirin kankare impermeability. Ruwa-ciminti rabo, a matsayin babban abin da ke shafar rashin daidaituwa na kankare, idan darajarsa ta fi 0.55, zai wuce yawan ruwan siminti kuma ya haifar da ramukan zubar jini da yawa a cikin kankare, ƙara permeability na kankare. Idan rabon siminti na ruwa ya yi ƙanƙanta, the workability na kankare za a shafa da kuma anti-permeability na kankare za a adversely shafi.
Cie-China.org ita ce jagorar kumfa kankare abubuwan da ke samar da kayan aikin da ke ba da wakili mai kumfa, superplasticizer,kumfa kankare ƙarfin haɓakawa don kankare mai nauyi, CLC tubalan. Idan kuna nema wakili mai kumfa, don Allah a ji daɗi tuntube mu.