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
AN EXPERIMENTAL STUDY ON STRENGTH OF CONCRETE USING RECYCLED AGGREGATES AND MANUFACTURED SAND Aviral tripathi1 , Dr. Pramod sharma 2, Dr. J.S Chauhan3 1.Research Scholars, Civil Engineering Department, Samrat Ashok Technological Institute, Vidisha (M.P.) 464001,
India. 2. Professors, Civil Engineering Department, Samrat Ashok Technological Institute, Vidisha (M.P.) 464001, India.
---------------------------------------------------------------------***--------------------------------------------------------------------Abstract - This research looks into the feasibility of using manufactured sand(M-sand) or arti:icial sand and recycled coarse aggregate (R C A) to make concrete. In this experimental programme, 44 concrete mixes were prepared in which natural coarser aggregate (NCA) is replaced with RCA in proportions ranging from 10% to 100%. Similarly, M Sand sand is used in place of natural river sand in increments of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%. The binder content and water content were kept consistent for all combinations. M-sand and RCA are evaluated for their effect on the fresh and hardened characteristics of CONCRETE. The study's :indings revealed that the toughened properties of concrete using 50% Msand are much higher than the control mix. The toughened qualities of the CONCRETE with 100% RCA were discovered to be less than those of Ordinary concrete. As a result, as the amount of RCA substitution grows, so does the strength decreases. The results, however, demonstrated that M-sand may generate CONCRETE with weak and medium compressive strength (20MPa - 45MPa).
Key Words: Fresh Concrete; Recycled Coarser Aggregate; Manufactured sand; Compressing Strength etc.
1.INTRODUCTION A lack of land-illing space activities will immediately result from the large volume of garbage produced by construction and demolition (C&D) and industrial by- products. Innovative and unconventional resources can help the construction industry go in the direction of sustainability. RCA has a lower density and a higher water absorption rate than natural coarse aggregate because of the adhering cement mortar on its surface. It is also less expensive. Additionally, it provides extra advantages and lessens the in-luence on the environment. Concrete loses compressive strength when mortar fragments from old concrete are present in RCA. Since ancient times, construction projects have used river sand as -ine aggregate. However, limitations placed on the usage of river sand from the riverbed as a result of a lack of availability or insuf-iciency or shortage and growing demand have motivated researchers to look for other materials for -ine aggregate. River sand has a
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smoother surface than M- sand, which is more angular. M-sand is therefore becoming more and more common in the construction sector these days. 1.1 RESEARCH SIGNIFICANCE Natural river sand is extremely scarce, so substitutes like arti-icial sand, foundry sand, blast furnace slag, pulverised granulated blast furnace slag, and other minerals must be used. Even coarse aggregates are getting more and more dif-icult to -ind, so a replacement material must be used. Most nations have already made the switch to recycling and repurposing old building materials. Utilising demolished concrete is a viable option for doing this; but, before being utilised to make new concrete, the material must be quality-checked. The quality of concrete must be evaluated using a thorough experimental plan. The results of a study that used M-sand to create recycled aggregate concrete are presented in this publication. Fresh properties such as slump -low test and hardened properties such as compressive strength of concrete are studied.
2. MATERIALS a). CEMENT: - All mixes are made with Portland pozzolana cement that confirms to IS:1489 Part 1. The following physical characteristics of Portland Pozzolana Cement, as determined by relevant tests in accordance with IS:4031-1988, are shown:
Table 2.1: Portland Pozzolana Cement’s Physical Characteristics
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