IOSR Journal of Engineering (IOSRJEN) www.iosrjen.org ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 05, Issue 07 (July. 2015), ||V2|| PP 25-30 International organization of Scientific Research 25 | P a g e Incorporation of Rice Husk Ash as Cement Replacement Muhammad Aleem 1 , Istehsan-ur-Rahim 2 , Umair Anwar Awan 2 , Usman Afzal 2 , Usman Haseeb 2 1 (Department of Civil Engineering, University of South Asia, Lahore, Pakistan) 2 (Department of Civil Engineering, University of South Asia, Lahore, Pakistan) Abstract: - Concrete is one of the important icon of construction industry. The use of concrete in construction industry intensified due to rapid development and research. After water, concrete is the second most frequently used material worldwide. The assimilation of waste material in concrete is very common from the last few decades, because of their technical tendency regarding environmental pollution and reduction of cost as well. During the production of cement, a large amount of carbon dioxide (greenhouse gas) releases which effects the environment badly. This work is carried out by using Rice Husk Ash (RHA) in concrete as a partial replacement of Ordinary Portland Cement (OPC). RHA is a byproduct of farming scum. RHA contains a bulky amount of silicon dioxide. The pozzolanic reactivity of RHA boost to use it as a cementious material in concrete. OPC was replaced with RHA at 0%, 5%, 10% and 15%. Addition of RHA in concrete is a sustainable approach, it reduces the pollution and provides strength and reduces the cost as well. Tests were performed on fresh as well as hardened concrete after 7, 14 and 28 days of curing in water, Hydrochloric acid and in sulfuric acid. The value of compressive strength of incorporated sample is more as compared to controlled sample. Results indicates that the addition of RHA improves the properties of concrete which includes packing density. It increases the strength and durability of concrete in term of sulphate and chloride resistance. Keywords: - Rice Husk Ash, Cementious, Compressive Strength, Ordinary Portland Cement, Pozzolanic I. INTRODUCTION The Rice husk (RH) is the agricultural residue which is obtained from the covering of rice grains during the milling process. Manufacturing of rice in the world is more than 700 million tones. Rice husk comprises 75-90% organic matter such as lignin, cellulose, etc. and rest inorganic components like alkalis, silica and trace elements [1]. Rice Husk Ash (RHA) is a by-product as a results of RH burning. The production of RHA is abundant in areas where rice crops are more. The most difficult problem is the disposal of RHA and due to the difficulty involved in its disposal RHA has become environmental hazard. Lots of approaches are being thought of for disposing them. Open burning of RH do not produces a good quality of ash and is banned in many countries due to the problem of pollution [10].It is usually dumped into water streams, and as far as the landfilling is concerned, it causes environmental pollution. The earlier studies shows that the high content of silica can be used as a cementious material. With the development of material sciences and technologies, a lot of research work has been done to improve the properties of concrete. As the main constituent of concrete is cement. The production of Cement is the greatest generation of CO 2 and harmful effects including global warming, regional acid rain and reduction in non-renewable resources, each ton of cement produces 1 to 1.25 tons of CO 2 [2]. As RHA have cementious nature, so utility of this waste for the purpose of benefit that provides safe environment friendly disposal of RHA. Due to its pozzolanic behavior and filling ability RHA will be beneficial to use it in concrete. RHA in concrete acts accelerator because of having high silica content that shorten the setting time through absorption of surrounding water and provides several advantages which includes durability, improved strength, reduces the cost of cement and the most important in all of that is environmental benefits related to disposal and reduction in the emission of carbon dioxide [3]. It is the sustainable approach by adding RHA, the voids present in between the cement particles are filled and it improves the Interfacial Transition Zone (ITZ) due to its pozzolanic result. The decrease in bleeding water results in a stronger ITZ between aggregate particle and cement paste which provides more impermeable and durable concrete. Workability of concrete having RHA will be improved by densification the mixture [10]. RHA not only improves the properties and durability of concrete but also reduces the amount of cement consumed in construction processes. Earlier studies pertaining to merged RHA to concrete are not recent. Use of RHA in concrete was untested in 1924 [4] up to 1973 investigation has been done on the pozzolanic reactivity of RHA [5]. Mehta has shown significant reduction in porosity of cement paste with RHA addition and established that combustion of RH under organized temperature produces amorphous form which contains silica [6]. In 1972 Mehta publishes his first article which includes the use of rice husk [7]. Rodrý´guez de Sensale stated that the mortars and
Incorporation of Rice Husk Ash as Cement Replacement
Apr 26, 2023
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