Elemental analysis of rice husk ash

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Elemental analysis of rice husk ash

Elemental analysis of rice husk ash

The major compounds from rice husk are silica and cellulose which yields carbon when thermally decomposed [ 2 ]. In the majority of rice producing countries much of the husks produced from the processing of rice is either burnt or dumped as a waste, which constitute an environmental challenge.

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Starting from however, various researches have been carried out, not just to control the disposal and pollution problems associated with rice husk but also to find a value addition to this waste product by using it as a secondary resource material.

In certain regions, the husk is used as fuel for parboiling paddy in the rice mills [ 3 ]. The use of rice husk in the power production has been reported by Reddy and Alvarez [ 4 ] and several researchers have investigated on the use of rice husk ash RHA as a pozzolanic material which can be used in partial replacement of cement [][ 5 ].

Elemental analysis of rice husk ash

Thus, it is imperative that the silica content of RHA meet this specification to be used as a cement replacement material. A research indicates that RHA from the same source calcined at the same temperature but using different methods has different silica content levels [ 12 ].

The silica content of RHA also depends on the location from which the rice husk is obtained as well as the variety of rice used [ 13 ]. Varying the calcination temperature of rice husk as well as the calcination time will to a large extent determine whether the silica content of the husk will remain amorphous or produce silica in the crystalline phase [ 3 ].

In this research work, the effect of the calcination temperature of rice husk ash by burning in a programmable furnace and at a constant calcination time, on the silica content of the rice husk ash is investigated.

Experimental Program The experimental program for this research work includes the treatment of rice husk and the testing was carried out on rice husk ash.

Materials and Methods The materials used for this research work include: Rice husk- It was collected from rice milling plant dump in Gboko, Benue state, Nigeria.

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Dangote cement -a brand of Ordinary Portland cement produced locally in Nigeria-was used in the course of the research. Tests were carried out in accordance with BS EN to determine the physical and chemical properties of the cement used.

Treatment of Rice Husk The rice husk was washed with water to remove impurities and dried through direct sunlight. Then, the husk was burnt in the open air i. The RHA was left in the furnace to cool for 48 hours. After that, a beneficiation of the RHA was carried out using the water beneficiation method.

In this method, the carbonated rice husk was washed with water to remove sand and unburnt carbon charcoal material present. The ash was then soaked in a dilute solution of 2M nitric acid for about two hours. The aim of the soaking is to remove carbonized material and any other acid soluble material.

The acid was washed off and the ash dried in the open air for 48 hours. The burning time was chosen following Salas et al Mix Design and Mixing Process The aim of mix design is to determine the proportion of each of the constituents of the cement mortar in the mix.

The absolute volume method of mix design was used to determine the quantities of cement and water required.

Water to cement ratio of 0. The quantities of the various materials used are presented in the Table 1 Table 1. Mix Design Quantities Download as.In this study, the effect of the calcination temperature of rice husk on the pozzolanic properties of the resulting rice husk ash (RHA) especially its silica content was investigated.

Rice husk was collected from a rice milling plant and washed to remove sand and other impurities, beneficiated using the water beneficiation method and calcined at temperatures of , , , and °C. 1. SJSTR1: Elective Course Recommendation Model for Higher Education Program [ KB] 2.

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Elemental analysis of rice husk ash using X – ray fluorescence technique Omatola, K. M1* and Onojah, A. D.2 2 Department of Physics, Kogi State University, Anyigba, Kogi State, Nigeria.

Department of Physics, University of Agriculture Markudi, Benue State, Nigeria. Accepted 17 March, American Journal of Civil Engineering and Architecture. The result of XRF for untreated rice husk, beneficiated rice husk ash and RHA calcined at , , , and.

Elemental Analysis Of Rice Husk Ash inherent design limitations which have reduced its sensitivity to some elements [28] The XRF technique is known to be unable to detect elements with atomic weights.

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