O’Z-O’ZINI DAVOLOVCHI BETONLARDA BAKTERIYALARNING MIKROKAPSULLALARINI KIRITISH USULLARI
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Abstract
Beton yoriqlar binoning strukturaviy konstruksiyaga zarar yetkazmasligi va muddatni uzaytirish uchun zudlik bilan ta’mirlanishi kerak. Biologik o'z-o'zini davolovchi beton bu yog'ingarchilik paytida mikrobial aktivlik asosida qo'zg'atilgan kaltsiy karbonatning biokimyoviy reaktsiyasini o'z ichiga olgan muqobil texnologiya sanaladi. Ushbu tadqiqot sporalarni inkapsulatsiyalashning eng mos usulini aniqladi. Beton aralashtirish va qotib qolish davrida Bacillus sphaericus bakteriya turining sporalarini himoya qilish uchun natriy alginat bilan aralashtiriladi. Ushbu texnika turli usullarda (ekstruziya, buzadigan amallar bilan quritish va muzlatish) natriy alginat bilan bakteriya sporalarini kapsulalash uchun foydalaniladi. Muzlatib quritish jarayon bakterial sporalarning eng yuqori omon qolish darajasini (100%) ta'minladi, shu bilan birga uzoq va qisqa vaqtlarda quritilgan jarayonlarda spora omon qolish darajasi mos ravishda 93,8% va 79,9% ni tashkil etdi. Aralashmani tekshirish uchun ohak bilan aralashtirilgandan keyin mikrokapsullangan sporalarning hayotiyligi, parchalangan karbamid tahlili olib borildi. Natijalar shuni ko'rsatdiki, muzlatilib quritilgan sporlar ham eng yuqori darajani ko'rsatdi. Shunday qilib, muzlatilib quritilgan sporlar bilan aralashtirilgan betonning o'z-o'zini davolash ko'rsatkichi baholandi. Natijalar ohak namunalarida kuzatilgan yoriqlarni davolash nisbati muzlatilib quritilgan mikrokapsullangan sporlar bilan bakteriyalar bo'lmaganlarga qaraganda sezilarli darajada yuqori ekanligini ko'rsatdi. Bu tadqiqot shuni ko'rsatdiki, muzlatilib quritish o'z-o'zini davolash beton texnologiyasida mikrokapsulyatsiya usuli sifatida yuqori salohiyatga egaligini ko’rsatdi.
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