This document presents recommended methods and procedures for measuring, mixing, transporting, and placing heavyweight concretes that are used principally for radiation shielding in nuclear construction. Also covered are recommendations on cement, heavy- weight aggregates, water, and admixtures. Mixture proportioning of heavyweight concrete is discussed. Mixing equipment, form construction, placing procedures, and methods of consolidation are described. Quality control, inspection, and testing are empha- sized, and a list of references is included. Preplaced heavyweight concrete is not discussed in this version of 304.3R. It is covered in the 2004 version of the document.
Hakim S. Abdelgader (12-2020)

Abstract Determination of the in-situ engineering properties of subsurface ground materials has always been a challenge for geotechnical engineers. Several in –situ test methods have been developed. Dynamic cone penetration test (DCPT) is one of the in-situ penetration tests which have been widely used to determine the geotechnical parameters of soil. The dynamic cone penetration test (DCPT) is a quick and easy to set up and run onsite. Due to the economy and simplicity of the test, better understanding of correlations between its results and the geotechnical parameters of soil can reduce significantly the efforts and cost to evaluate the engineering properties of ground materials. In this research, a light weight simple DCP device was used for evaluation of some engineering properties of Tripoli sand. The device consisted of an 8kg hammer that drops over a height of 575 mm and drives a 60o cone tip with 20 mm base diameter into the ground. The intention of this investigation is to obtain sufficient data to establish appropriate and reliable correlations among soil parameters and DCPT results. In order to investigate the effect of fine material content on the correlations between the geotechnical parameters and the penetration index (PI) of the DCPT of Tripoli sand, soil samples of different fine material content have been prepared and tested. This research presents the results of the laboratory tests as well as the analysis and discussion of these results. Based on the analysis of test results, the relationships between the DCPT results (penetration index, PI) and the geotechnical parameters of Tripoli sand such as relative density and CBR value are obtained. In this study penetration index of the dynamic cone penetration test from the laboratory prepared samples were correlated with laboratory CBR,s for a number of different soil types. Unique models were found for each type of soil with good coefficient of determination (R2). The combined data gave also a correlation between CBR and penetration index PI which compare very well with those obtained from other studies. There is no clear correlation between the penetration index and both the dry density (gr/cm3) and relative density, with wide scatter and a low coefficient of determination (R2) value.
نورالدين سالم الكثاري (2011)

تشهد الجماهيرية في هذه الأيام نهضة معمارية كبيرة حيث يتم التخطيط والتصميم والتنفيذ لمباني شاهقة، وهذا النوع من المنشآت يتميز بخصوصيات من حيث الأحمال المؤثرة عليها وكذلك في اختيار أساليب وطرق تنفيذها. إن تقدير الأحمال المؤثرة من رياح وزلازل وغيرها في هذه المنشآت ليحتاج إلي فرضيات دقيقة وتحليلات خاصة وتصاميم متطورة مع استخدام تقنيات لمواد إنشائية حديثة، كل هذا يصاحبه برامج تنفيذية متطورة من حيث طرق التنفيذ وتجهيزات الإنشاء. كل ذلك بهدف توفير الأمان والإسراع في التنفيذ و التقليل من الكلفة وتقديم المستوى الأعلى من حيث الجودة والمتانة والديمومة. إن الفهم الدقيق للأسس المعتمدة في تحديد نوع الأحمال المؤثرة على المنشآت العالية وكذلك الأساليب الإنشائية المتطورة تساعد على تحديد الأثر الفاعل من قوى وعزوم وغيرها وبالتالي يمكن استحداث أو تطوير نظريات التصميم لمثل هذه المنشآت لضمان سلامتها وإطالة عمرها واقتراح أساليب الصيانة اللازمة لها. كما أن التطور التقني في التجهيزات المستخدمة في الإنشاء يمكن من إعداد برامج تنفيذية متطورة ومتميزة تعطى كفاءة عالية في الجودة والسرعة في التنفيذ والتقليل من الكلفة. هذا المشروع سيعطي خلفية علمية حول تحديد تأثير الأحمال المؤثرة على المباني العالية والاعتبارات التصميمية للتشطيبات والنواحي الإنشائية المعتمدة مع التطرق إلي الأساليب المتطورة في أساليب التنفيذ. Abstract Jamahiriya is witnessing these days, where the great renaissance of architectural planning, design and construction of high-rise buildings. These types of structures are surely special structures. Their specialty comes from the type of loads acting on it and methods of analyzing forces and the deformations due to these forces. The design Considerations are surely different from the simple structures because its complexity. The development of the new different construction materials and equipment lead to adopt special analysis, design and construction methods. The understanding of the approved basis for determination of the acting loads on high-rise buildings and the advanced structural design methods all these help the analysis to give the effective action of forces and moments and others, these lead to develop new theories of design to assure more safety and durability, in the same time to suggest methods of construction with les cost and higher efficiency. Also the technical development in construction, equipment used help to arrange distinguished advanced and execution programs. That gives high efficiency in quality and reduction of construction time, which leads to reduce the total costs.The study will present scientific background about the estimation of the acting loads on the high-rise building and about the design consideration, which are adopted by leading in specifications, in the same time the study will overview the advanced construction programs.
العجيلي ميلود غبار (2009)