International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 12 | Dec 2022
p-ISSN: 2395-0072
www.irjet.net
HIGH STRENGTH CONCRETE DESIGN (M80) Chirag Patil1, Harshavardhan Sarwade2, Divyank Patil3, Om Pawar4, Ritesh Tandekar5 BE Final Year student1, BE Final Year student2, BE Final Year student3, BE Final Year student4, Assistant Professor5 Department of Civil Engineering, Terna Engineering College ------------------------------------------------------------------------***------------------------------------------------------------------(polycarboxylate ether) or naphthalene-based super Abstract: Since a very long time, concrete has been a key component of building a solid and dependable infrastructure. In the past, construction projects have generally employed concrete with compressive strengths of 20–40N/mm2. Long-term poor performance of a due to degradation, desire for increasingly complex structural forms typical concrete sped up research to create concrete that would be successful in all areas. workability, durability, and affordability that a novel material is assessed on, allowing the development of in addition to delivering materials that will have extra-ordinary lean designs, ecological and economical structures. Long-term improved performance and lower maintenance requirements. High Strength Concrete's development has been a significant development in concrete technology. A significant advance in concrete technology has been the creation of high strength concrete. Although greater strengths have been obtained and employed, high strength concrete (HSC) is defined as concrete having a specific characteristic cube strength between 40 and 100 N/mm2. For both precast and in situ works, strength values between 80 and 100 N/mm2 and even higher are being utilised. When weight reduction is crucial or when architectural considerations call for fewer load-bearing parts, high strength concrete is required.
Keywords: High strength concrete (HSC), compressive strength, cost-effective
1. INTRODUCTION: High-quality materials are carefully chosen, and mixing patterns are adjusted to produce high-strength concrete. Due to the very low w/b ratio of 0.25 to 0.35, such concrete often has low water-binder ratios, making superplasticizers necessary to ensure appropriate workability. It's also highly advised to employ a mineral additive. The coarse aggregates have to be square or spherical. A hsc is in order to create high strength concrete, it is necessary to use concrete that is stronger and more durable than regular concrete. This concrete includes one or more cementitious components, such as fly ash, silica fumes, or powdered granulated blast furnace slag, as well as a super plasticizer, in most cases. Complete understanding of the varied qualities of these constituent elements is necessary for the design of the concrete mix. Because they need less mixing water than standard super plasticizers—more specifically, pc © 2022, IRJET
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plasticizers—they are utilised A pc-based super plasticizer (which can reduce the amount of mixing water by 30%) and 5–10%silica fume will be needed for high strength concrete (m60 and above) mixes, which are typically OPC 53-grade. In this study, mix design is done with m80 grade concrete.
2. USED MATERIALS: Cement: In concrete, cement serves as a binding component. OPC 53 grade cement is employed in this study. The cement is grey in tone. The cement has a specific gravity of 3.15. Initial and ultimate setup times are 30 and 600 minutes, respectively. Fine gravel: Fine aggregate is made of river sand. The fine aggregate has a specific gravity of 2.16. One percent of fine aggregate can absorb water. According to sieve analysis, fine aggregate belongs to zone II and has a fineness modulus of 2.319. Coarse aggregate: In this research, stones obtained from crushed rocks are employed as coarse aggregate. weight of the fine. The total is 2.74. It absorbs 0.5% more water than usual. length of 40% of aggregates between 4 and 10 mm are considered coarse. 60 percent of 10mm to 20mm aggregate. The aggregates are pure. robust, durable particles without coatings or absorbed compounds of fine materials, like as clay. Water: The lone factor with the greatest impact on most of the quantity of water used in the mixture determines all of the qualities. Water that is suitable for human consumption generally use water for mixing. Free water should be utilised to prepare concrete. from biological substances and soil. Super plasticizer: The next generation of these admixtures is represented by super plasticizers made of polycarboxylate ether. Due to their chemical composition and relatively moderate dose (0.15-0.3% by cement weight), they provide a water reduction of up to 40%. A configuration that promotes effective particle dispersion
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