MECHANISM EFFECT OF A SUGGESTED LOCAL AND ECONOMICAL ADDITIVE ON THE COMPRESSIVE STRENGTH AND DURABILITY OF CONCRETE | ||||
| JES. Journal of Engineering Sciences | ||||
| Article 4, Volume 41, No 1, January and February 2013, Page 29-47 PDF (627.38 K) | ||||
| Document Type: Research Paper | ||||
| DOI: 10.21608/jesaun.2013.114684 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. M. Rashwan; Mostafa A.Razek | ||||
| Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt | ||||
| Abstract | ||||
| Modern production of high quality concrete is closely connected with wide use of different types of admixtures, by which using of small doses allowed to obtain the required physical, technical, exploitation and economical properties of concrete. The use of concrete in water or wastewater tanks has many benefits such as strength, long service life and cost effectiveness. It has emerged as the dominant construction material for the infrastructure needs of the twenty-one century. In addition to being durable, concrete is easily prepared and fabricated from readily available constituents and is therefore widely used in all types of structural systems. The challenge for the civil engineering community in the near future is to realize projects in harmony with the concept of sustainable development and this involves the use of high performance materials and products manufactured at reasonable cost with the lowest possible environmental impact Physical, chemical absorption and chemical reactions may occur between the admixtures and the hydrating components of cements. Physical and chemical changes occur when admixtures such as accelerators, retarders, water reducers, and superplasticizers are added to the cement - water system. Mechanisms of the action of admixtures, changes in water demand, viscosity, setting, slump loss, shrinkage, kinetics of hydration, micro structure, strength and durability of fresh and hardened cement pastes can be explained by the interaction effects. Therefore, the main purpose of this research is to study experimentally the mechanism effect of a proposed local and economical additive on both the compressive strength and durability of concrete. The experimental results showed that, the optimum composition of all components of the suggested admixtures (BM 2010) containing wastes from petroleum industries and silica fume and naphthalene sulfonate was successfully and experimentally achieved. This paper focuses on the experimental studies about the possibility of producing new chemical organic admixtures containing in their compositions industries wastes by testing 180 cubic concrete specimens to propose the best-suggested admixture effect on their compressive strength and durability under these aggressive environmental conditions. | ||||
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