Quality Of Bricks Produced From Non-Conventional Clays

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

The available information indicated that there is heavy dependence onthe sediment of the Nile and its tributaries as well as khours for productionof fired clay bricks. About 94% of the produced bricks in Sudan is of Nilesediments origin. This situation led to degradation of highly fertile land. Thisstudy aims to find clays suitable for manufacture of bricks away from riverbanks.One of the most abundant clay type in Sudan, is the black clay whichcovers about 16% of its area and on which about two third of the populationlives. It is widely used as building material that requires special skills andneeds continuous maintenance. Black clay of the Khartoum North, the blackcotton soil of (Sennar) and kaolinitic clay from Western Omdurman, werechosen to be the alternative clay for production of fired clay bricks. Thephysical properties (% of sand, clay, silt, pleasticity and shrinkage plasticlimit and plasticity index) and its chemical content of (iron, sodium, calciumand potassium) were determined.Thirty bricks from each clay type were manufactured without anytreatment or additives. After shaping, drying and firing, the produced brickswere inspected and tested for suitability for use.The results showed that the extent of cracks of the bricks made fromthe black clay and black cotton clay depends on the method of drying. Thebricks kept in dryers showed no cracks. On the other hand all the bricks leftto dry in open air cracked.The bricks produced from kaolinitic clay showed no cracks under bothdrying method. The colour of kaolinitic bricks was whitish.ivAfter three days of firing, the bricks produced from black clay ofblack cotton clay was highly broken due to lime-bursting as a result of itslime content. On the other hand the bricks made from kalonitic clayremained intact after firing.The problem of lime-bursting was solved by either grinding the blackclay to 1.0 mm or less grain size or by adding common salt (sodiumchloride). The results showed the optimum amount of salt is 0.2% by weight.To overcome cracking after firing, different rations of sand and grogwere added to the mix. The ideal ratios were: 60% clay, 25% sand and 15%grog for black cotton soil and 70% clay, 10% sand and 10% grog for blacksoil.To change the kaolinitic bricks from whitish to red colour, materialscontaining iron oxide were added. The added material included the Blue Nileclay and/or ferruginous stone. The best mix proportion was 70% kaolinitic,20% Blue Nile clay and 10% grand ferrigunous stone.The study recommended more research to investigate the economicfeasibility of these alternatives.

روابط وملفات

التعريف والنوع

رقم الوثيقة

03b210bd-01f2-45a8-ac80-ad8524be0256

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1635674_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"رشا عبدالسلام","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"محمد حسين","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Quality Of Bricks Produced From Non-Conventional Clays

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

محمد حسين

الإعداد

رشا عبدالسلام

الاقتباسات الببليوغرافية