IOSR Journal of Engineering (IOSRJEN) www.iosrjen.org ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 04, Issue 04 (April. 2014), ||V7|| PP 08-14 International organization of Scientific Research 8 | P a g e The Quality of Natural Pozzolanic Materials at Bayoda desert in Northern Sudan Eltayeb A/Ellatif Ahmed Habib 1 , Salih Elhadi. M. Ahmed 2 1. Doctoral Candidate (Sudan Academy of Sciences), Lecturer, Faculty of Engineering and architect, University of Bahari, Sudan, 2. Professor of structural engineering –Sudan University for Science and Technology, Sudan, Abstract: The importance of Cement as a binding material is increased with the onset of the development and the physical renaissance. Due to the highly demand of OPC (for concrete and other purpose of construction) it becames expensive and scarce commodity and this has severely limited the construction of affordable housing in Sudan. This large demand needs another alternative material from two points of view, economically and availability. The objective of this study is to find other alternative binding materials that can be blended with OPC to enhance the properties of fresh and hardened concrete as well as to reduce the economical phase of cement. Three Pozzolanic samples ,represent natural Pozzolana, were brought from different location at Bayoda desert. The samples were grounded firstly and tested for the chemical contents and after that mixed with partial replaced in the ratio of 0%, 10%, 20%, and 30% by weight of OPC to form concrete to detect the fresh and hardened properties of the mix. The results recorded were showed that all the three samples are reactive material with amorphous silica and alumina that fulfilled the requirement of the Pozzolanic properties. The better strength tests were reached with sample S2 with OPC, which gave range of developing of compressive strength between 0.83 up to 0.96% in comparison with pure OPC. And gave some enhancement in workability of the mixes comparing to pure OPC mix. The recommendation is that The Quality of Natural Pozzolanic material at Bayoda desert is good and confirm with the standard properties of natural Pozzolana. And can be mixed with OPC in the above proportions to be used as Pozzolanic Cement to enhance some properties of concrete and mortars. Keywords: Pozzolanic materials, Blended Cement, Chemical Composition, Workability, Compressive Strength. INTRODUCTION From 1880 – 1996, the world’s annual consumption of Portland cement rose from 2 million tons to 1.3 billion ton. This was associated with major environmental cost include: a) cement manufacturing is the third largest CO 2 producer and for over 50% of all industrial CO 2 emissions (for every 1 ton of cement produced, 1.25 tons of CO 2 is released in the air); b) 1.6 tons natural recourse is consumed to produce 1 ton of cement. This calls for the use of other alternative sustainable binders. One of the most promising materials is Pozzolanic materials (10) . The importance of Cement as a binding material is increased with the onset of the development and the physical renaissance. Now concrete is an important material for building construction, the present annual world production of concrete is above billion cubic meters. Due to this highly demand of OPC (for concrete and other purpose of construction) it became expensive and scarce commodity and this has severely limited the construction of affordable housing in much of the third world. This large demand needs another alternative material from two points of view, economically and availability (1) . Alternative cements provide an excellent technical option to OPC at much lower cost. Pozzolanas are an important ingredient in the production of alternative cementing materials to Portland cement. Pozzolanic materials are materials that containing reactive silica and\or alumina, which in their own have little or no binding properties but when mixed with lime in the presence of water it will set and harden like cement (2) . Pozzolanic materials are not a new materials, it is known to have been used by the Egyptians some 2,000 years BC. The use of lime – based mortar for the floors of huts has also been found in excavations dated long ago as 5600BC. BACKGROUND The raw materials of the natural Pozzolanic materials are available and distributed over a wide area of the Sudan regions. There are many locations for natural pozzolanas in Sudan.
The Quality of Natural Pozzolanic Materials at Bayoda desert in Northern Sudan
May 03, 2023
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