Kayayyakin Injini da Nau'in Rashin Ganewa na Ƙarfafan Ƙarfafa Fiber: Tasirin Nau'in Fiber da Abun ciki

Kankare ne aka fi amfani da shi Gina abu. Yana ba da fa'idodi da yawa, gami da wadatar sa ta yaɗu, tsarin samarwa mai sauƙi, ƙarancin farashi, da sauƙin aikace-aikacen. Ana amfani da shi sosai a fannoni daban-daban kamar gine-gine, hanyoyi, gadoji, ramuka, da injiniyan ruwa. Kamar yadda ɗimbin ayyukan injiniya suka haɓaka, buƙatun aikin siminti su ma sun ƙaru a hankali. Sakamakon haka, gazawar siminti na gargajiya, kamar rashin isasshen ƙarfi, juriya mara ƙarfi, da rashin kwanciyar hankali, sun bayyana. Don haka, haɓaka aikin kankare ya kasance ɗaya daga cikin mahimman hanyoyin bincike a aikin injiniyan farar hula.

Don haɓaka aikin kankare, ana ƙara zaruruwa yawanci don haɓaka kayan aikin injin sa da taurin sa. Misalai sun haɗa da Karfe Fibers (SF), filaye na roba (kamar polypropylene fibers), filaye na ma'adinai (kamar basalt fibers - BF), da fiber carbon (CF). Wannan tsarin ya ƙara haɓaka aikin siminti mai ƙarfi (HPC) da ultra high performance concrete (UHPC).

Zaɓuɓɓuka na iya, zuwa wani matsayi, inganta kayan aikin injiniya na kankare. Koyaya, nau'ikan fiber daban-daban da abubuwan da ke ciki babu makawa suna haifar da bambance-bambance masu mahimmanci a tasirinsu akan kaddarorin inji. A halin yanzu, mafi kyawun abun ciki na fiber, alaƙar ƙididdigewa tsakanin sigogi masu dacewa da kaddarorin injiniyoyi, da hanyoyin da ke cikin simintin da aka ƙarfafa fiber har yanzu suna buƙatar ƙarin bayani. Wannan binciken ya binciki fibers carbon (CF), basalt fibers (BF), da ƙarfe na ƙarfe (SF) a matsayin batutuwan bincike, suna shirya samfuran kankare tare da bambancin abun ciki na fiber. An zaɓi waɗannan zaruruwa saboda ingantaccen rubuce-rubucen haɓaka aikinsu a cikin kankare da aikace-aikacen tartsatsi. Ta hanyar gwaje-gwaje masu canzawa masu sarrafawa, tasirin nau'in fiber da abun ciki akan ƙarfin matsawa, modules na roba, da yanayin gazawar siminti an yi nazari akai-akai. Haɗa hoton dijital da dabarun bincike na microscopy na lantarki (SEM), an lura da halayen juyin halitta na simintin ƙarfafa fiber yayin gwaje-gwajen, wanda ya haifar da sakamako masu zuwa:

1.Compared to talakawa kankare (PC), da incorporation na karfe zaruruwa (SF), carbon zaruruwa (CF), da kuma basalt fibers (BF) yana haɓaka kaddarorin injina na siminti mai ƙarfafa fiber (FRC) kuma ya canza yanayin gazawarsa. Waɗannan zaruruwa sun canza ƙaƙƙarfan simintin da halayen matsi na farko. Yayin da abun ciki na fiber ya karu, yanayin gazawar ya canza daga gaggautsa zuwa ductile. Mahimmin mahimmin wurin sauyawa shine 0.5% don simintin fiber na karfe (SFC) da 1.0% na duka carbon fiber kankare (CFC) da kuma basalt fiber kankare (BFC). Don haɓaka aikin injiniya, mafi kyawun abun ciki don filayen ƙarfe shine 2.0%, don fiber na carbon 1.0%, kuma don fibers basalt 0.5%.

2.Ko da yake abun ciki na fiber na iya inganta haɓakawa da haɓaka ƙarfin siminti, babban abun ciki mai yawa zai iya haifar da wani abu na "saturation", yana haifar da fiber "agglomeration." Wannan yana haifar da mummunan tasiri ga siminti na zahiri, ƙarfi, da halaye na lalacewa. Ƙarfe fiber kankare ya sami kyakkyawan aiki a ƙaramin ƙarar fiber na 2.0%, yayin da carbon fiber kankare da kuma basal fiber kankare ya kai mafi kyawun aikin su a 1.0% da 0.5%, bi da bi. Bayan waɗannan mafi kyawun abun ciki, aikin ya ƙi.

3.Scanning Electron Microscope (SEM) bincike ya nuna cewa haɗin kai tsakanin zaruruwa da simintin matrix yana da tasiri mai mahimmanci na macroscopic inji Properties na kankare. Adadin da ya dace na zaruruwa suna samar da tsarin cibiyar sadarwa mai girma uku mai girma a cikin siminti, yana haɓaka haɗin matrix da aikin gaba ɗaya. Duk da haka, babban abun ciki na fiber da ya wuce kima yana haifar da haɓakar fiber, ƙirƙirar yankuna masu rauni na tsaka-tsaki da rage ƙarancin simintin da ƙarfi. Canje-canje a cikin ƙananan ƙirar sun yi daidai da juyin halitta na kayan aikin macroscopic.

4.The Bugu da kari na zaruruwa muhimmanci canza gazawar yanayin na kankare. Idan aka kwatanta da siminti na fili, simintin da aka ƙarfafa fiber ya nuna mafi girman amincin bayan gazawar, tare da ƴan tsage-tsage da kunkuntar, da haɓaka tauri. Zaɓuɓɓukan ƙarfe sun fi tasiri wajen hana fasa, sai kuma filayen carbon da filayen basalt. "Sakamakon haɗakarwa" na zaruruwa ya taka muhimmiyar rawa wajen dakile yaduwar fasa, yayin da "sakamakon mu'amala mai rauni" yana da mummunan tasiri akan kaddarorin inji.