International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 11 | Nov 2024
p-ISSN: 2395-0072
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INVESTIGATING THE CONCRETE PROPERTIES WITH AND WITHOUT ADDITIVES Bibek Bhandari Undergraduate Student, Civil Engineering Department Oxford College of Engineering and Management, Nepal ---------------------------------------------------------------------***--------------------------------------------------------------------study in 1994 found that Abrams' law is not directly Abstract - This study embarked on a comprehensive
applicable to mixes with fly ash, suggesting an alternative augmented water-cementitious materials ratio law for such mixes [1].
exploration of the influence of rice husk ash as a replacement for fine aggregates in concrete samples. Beginning with an indepth literature review, the research delved into the mix design process, understanding the pivotal components for concrete preparation. Various tests, including compressive strength, slump, and sieve analyses, were conducted, adhering to the Indian Standard approach. The study's focal point was the replacement of fine aggregates with rice husk ash in proportions ranging from 0% to 2%. The results showcased a notable enhancement in both compressive and flexural strengths with a 1.5% rice husk ash replacement, making it the optimal choice. After 28 days of curing, this mix exhibited the highest compressive strength of 47.06 N/mm2 and a flexural strength of 6.63 N/mm2. The research concludes that concrete mixed with 1.5% rice husk ash offers superior mechanical properties, marking its potential for sustainable construction applications.
In 2003, Siddhique conducted an experimental investigation to evaluate the mechanical properties of concrete mixtures where fine aggregate (sand) was partially replaced with Class F fly ash [2]. The study revealed significant improvement in the strength properties of plain concrete with the inclusion of fly ash as a partial replacement of fine aggregate [2]. Limbachiya et al., in 2012, discussed the environmental benefits of using recycled concrete aggregate in fly-ash concrete [3]. Their study showed that while embedding a high amount of recycled concrete aggregate could lower the resistance to chloride penetration and carbonation of concrete, it still achieved a comparable design strength to that of the control mix [3].
Key Words: Rice Husk Ash, Compressive Strength, Flexural Strength, Concrete Mix Design, Fine Aggregates, Slump Test, Sieve Analysis.
Sarker and Nath, in 2011, investigated the durability properties of high strength concrete utilizing high volume Class F fly ash [4]. Their results indicated that the inclusion of fly ash reduced sorptivity and chloride ion permeation significantly, thereby improving the durability properties of concrete [4].
1.INTRODUCTION Concrete is everywhere around us, from bridges to buildings to roads. This versatile material is made up of cement, water, sand, and aggregates that are mixed in specific ratios to produce fresh concrete. As it undergoes the curing process, it hardens into a solid structure. Adding additives to concrete has become increasingly popular today. A variety of additives are available in the market, such as fly ash, brick dust, and rice husk ash. Among them, rice husk ash is highly soughtafter for its affordability and accessibility. In construction projects, it's common to partially substitute sand with rice husk ash since it enhances concrete properties like strength and ductility. This results in more resilient structures that can withstand time and external forces.
Lastly, Kayali and Haque, in 1998, used a Class F fine fly ash to produce workable high-strength concrete [5]. Their study found that the optimum cement replacement for both 400 and 500 kg total cementitious material mixtures was 10%, with the 28-day maximum strength for the two optimum mixtures being 94 and 111 MPa, respectively [5].
3. OBJECTIVE OF THE WORK The endeavor's principal intention was to conduct an indepth investigation of evaluating and investigation of the concrete by the addition of rich husk ash,
2. LITERATURE SURVEY
The utilization of fly ash in concrete mix designs has been a topic of interest for researchers over the years. Abrams, in 1918, proposed the water-cement ratio law, which did not consider the effects of fly ash and silica fume as they were virtually unknown during that time [1]. However, Oluokun's
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To uplift the workability of the concrete by finding the appropriate ratio of the additives, To surge up the physical as well as mechanical characteristics of the concrete by considering the best material available,
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