International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
Analysis of Microstructural Behaviour of Rice Husk Ash Blended Cement Mortar Sonu Sharma1, Vaibhav Dubey2 1M. Tech Scholar, Construction Technology and Management, Faculty of Engineering & Technology, Rama University
Uttar Pradesh, Kanpur, India.
2Assistant Professor, Faculty of Engineering & Technology, Rama University Uttar Pradesh, Kanpur, India.
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Abstract- The stated work investigates the microstructural
properties of Rice Husk Ash and the viability of replacing cement with it. Cement was replaced by Rice Husk Ash (0–25 percent at 5% intervals) to investigate its impact on cement mortar's mechanical and physical characteristics, including the evaluation of the microstructure. Samples used were tested after 3, 7, and 28 days of curing. It was noted that when a sample has a consistent water content, it produces a dry mix when more than 10% of the cement was replaced by RHA. owing to dry mix the mortars attempt to hydrate itself was unsuccessful, and the strength starts declining as the Rice Husk Ash percentage rises. It was also noticed that consistency of cement was continuously increasing with increase in percentage of Rice Husk Ash when samples were prepared for checking consistency of cement at varied quantities of Rice Husk Ash. The compressive strength was seen to increase up to a 15% Rice Husk Ash, and results above this percentage were also superior to those of the similar samples with constant consistency. Peaks in the Rice Husk Ash 's XRD pattern revealed quartzite and coesite minerals, both of which have crystalline natures that signify silica concentration. The weight loss percentage of Rice Husk Ash was evaluated using thermal gravimetric analysis (TGA), and the phase transition was examined using differential scanning calorimetry (DSC) between 600 and 1000 C. As the Rice Husk Ash mixed cement mortar cured up to 3,7 and 28 days, the microstructures were also examined using SEM and EDS analysis. Keywords: XRD-X ray diffraction, TGA-Thermal Gravimetric analysis, DSC-Differential scanning calorimetry.
1. INTRODUCTION
installed cement capacity is 500 million tons per annum, producing 298 million tons of cement annually. India's cement production is anticipated to reach 500 million tons by 2021 and 800 million tons by 2030 due to the country's expanding infrastructure. Ash from the rice husk industry is a waste by-product. When utilized as fuel in boilers, rice husk produces Rice Husk Ash as a by-product. In India, it is widely available. Rice Husk Ash has been discovered to have a significant level of reactivity toward cement and lime. In the study, it was discovered that Rice Husk Ash maintained if not improved the mechanical and durability qualities of concrete and mortar made of blended cement. As a result, it can be utilized as a substitute material in concrete and mortar as partial cement replacement for the sustainable development. The use of Rice Husk Ash as an additional cementitious material or non-reactive filler might lessen the adverse effects on the environment (such as air pollution and soil pollution). Due to CO2 emissions, cement production severely harms the environment. Pozzolanic materials can be used in place of cement to lessen the environmental impact. Because pozzolanic material lacks cementing properties and reacts in the presence of free lime and moisture to generate C-S-H gel, a complete substitution of cement by Rice Husk Ash is not feasible. Using RICE HUSK ASH as a mineral additive, 10 to 15 percent of the cement might be replaced. The solid mixture's packing state has a major impact on the physical qualities, Surface area, morphology, particle size, and specific gravity are the main variables linked to the physical feature of Rice Husk Ash. The amount of amorphous silica, which combines with free lime [Ca(OH)2] in the presence of water during hydration, has an impact on the chemical character.
Any nation's economic development depends heavily on cement, and India's cement sector is the world's second-largest producer of cement after China. India uses 195 kg of cement per person annually. Currently, India's
The observation of the calcium silicates hydrate phase is of primary concern. The calcium silicate hydrate mineral structure changes weak crystal from fibres to a net-like structure. According to previous research on the use of fly ash in cement mortar, the mechanical strength increased
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