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العنوان
Properties and durability of self-compacting concrete /
المؤلف
Sherif, Mohamed Amin Saad.
هيئة الاعداد
باحث / محمد أمين سعد شريف
مشرف / محمود أحمد إمام
مشرف / أحمد حسنين عبدالرحيم
الموضوع
Concrete. Durability.
تاريخ النشر
2006.
عدد الصفحات
367 p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الهندسة المدنية والإنشائية
تاريخ الإجازة
01/01/2006
مكان الإجازة
جامعة المنصورة - كلية الهندسة - Department of Structural Engineering
الفهرس
Only 14 pages are availabe for public view

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from 405

Abstract

Self-compacting concrete is a new type of concrete that can be spread in heavily congested regions under its own weight, without vibration. It has excellent deformability and high resistance to segregation and bleeding. Self-compacting concrete is a result of the technological advancement in the area of concrete admixtures. Self-compacting concrete was developed in Japan in the late 1980s by Okamura to be mainly used for highly congested reinforced structures in seismic regions. Recently, this concrete has gained wide use in many countries in America and Europe for different applications and structural configurations.The objective of this study is to produce self­compacting concrete with locally available materials in the Egyptian markets. Many different test methods have been developed in attempts to characterise the properties of self­compacting concrete. So far no single method or combination of methods has achieved universal approved and most of them have their adherents. In addition, no single method has been found to characterises all the relevant workability aspects. So that, the authors invented apparatus is called Mansoura Flow Cone (MF­Cone) and it is used to determine both the filling ability and passing ability of self­compacting concrete simultaneously. The thesis also aims to clarify the benefits and the technical advantages of using self­compacting concrete in Egypt. In brief, the work of this thesis has been performed to investigate different fresh and hardened properties and durability of self­compacting concrete. The analytical part in this study aims to design a computer program predicting the properties of the required concrete in both its fresh and hardened states. Besides, with knowing the used materials and the required different proportions of each case of SCC and which is needed for any structural purpose. To achieve the objectives of this work, five groups of Self­compacting concrete (fc =12 to 52 MPa) with a total numbers of 61 mixes were prepared and investigated. Self­compacting concrete mixes provided slump flow up to 850 mm, falling time up to 2 sec, filling capacity up to 100%, filling height up to 30 mm, blocking ratio up to 1, and compressive strength up to 52 MPa. These results are quite appropriate for using self­compacting concrete in most construction sites. It is believed that self­compacting concrete is a promising construction material in the near future.