scholarly journals Deflection Behaviour of RC Beams using Reshaped Waste Tyre Rubber as Partial Replacement of Coarse Aggregate

2019 ◽  
Vol 8 (2) ◽  
pp. 4392-4395
Keyword(s):  
Natural Resources ◽  
Coarse Aggregate ◽  
Mechanical Energy ◽  
Research Work ◽  
Partial Replacement ◽  
Portland Cement Concrete ◽  
Conventional Concrete ◽  
Concrete Production ◽  
The World ◽  
Waste Tyre

The increasing demand of natural resources for the concrete production has impacted the surroundings and the concern to protect these natural resources is increasing. Lately, handling and management of scrap is the primary issue faced by the countries worldwide. The waste problem is the most important problems facing the world as a source of the environmental pollution. One of the censorious wastes to be control in today is ‘waste tyre’ because; recent development in transportation has create big number of vehicles, which produce huge quantities of used tyres. Disposing such waste tyres is a critical waste management concern around the world at the moment. Various research work had been conducted in the past which had results that showed reduction in the mechanical energy of the concrete. The motive of this study is to use the reshaped waste tyre rubber as partial alteration of coarse aggregate in the concrete and to examine the outcome of providing an mooring hole of10mm in dia on the surface of the rubber gravel which makes the cement plaster to form a cylindrical mooring between the gravel and the concrete as well work as are bar to the rubber gravel thereby, increase withstanding power to failure under load which simultaneously increase the strength. The partial replacements of coarse aggregates are done at 0%, 5%, 10%, 15% and 20% by quantity of coarse gravel. The resulting concrete beams are tested for the physical characteristics of concrete. The Comparison of flexural response of beams are made with ordinary Portland cement concrete (OPCC)and Reshaped Waste Tyre Rubber Aggregate Concrete (RWTRAC)for various compositions of Reshaped Waste Tyre Rubber Aggregate replacement to coarse aggregate. Consequently the tests on RWTRAC beams of 10 % rubber aggregate replacement are conducted and results indicated that all the beams are failed in pure bending region and gives deflection nearly same as the conventional beam with the influence of the ultimate moment. Based on the observations during testing, the beams failed in pure flexural compression failure mode. Ductility factor of RWTRAC beam also showed enhanced performance when compared with the performance of conventional concrete. After testing it is inferred that till 10% of RWTRA replacement, the compressive and flexural strength of concrete is nearly same as the conventional concrete, but from 10 to 20% the strengths are abruptly fallen.

scholarly journals Experimental Study on Strength of Concrete Partially Replacing Chiton shell as Fine Aggregate

2018 ◽  
Vol 7 (3.34) ◽  
pp. 406
Author(s):  
J Madhan Kumar ◽  
R Kalaiselvan ◽  
Raghul Raj
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Natural Resources ◽  
Coarse Aggregate ◽  
Marine Organism ◽  
Raw Material ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Split Tensile Strength ◽  
The World

The most widely used material in the world is concrete, consequently there is a large requirement for raw material of concrete such as Fine Aggregate, Coarse Aggregate and cement. the huge extraction of the aggregate for manufacturing of concrete as serious effect on the environment due to depletion of natural resources and pollution. This affects the eco system to great extent. Hence the project deals with finding replacement for the existing raw material used in concrete by replacing the fine aggregate from river which is largely used in construction by chiton shell. Sea shell is the corpus of the marine organism. The sea shell has been grinded to 4.75mm and then replaced in the concrete. M20 mix was used and cubic specimen were casted for 5 different percentage of partial replacement as 0%, 5%, 10 %, 20%, and 25 %. All the specimens are tested for 7 & 28 days compressive, flexural and split tensile strength. it has been noted that the highest strength is obtained for 25% replacement of chiton shell. it was also observed that  addition of sea shell power in concrete reduced workability hence superplasticizer were added to improve the consistency. 

scholarly journals Effect of Waste Tyre-Rubber Aggregate on the Strength Properties of Concrete

2018 ◽  
pp. 1-9
Author(s):  
Adetoye T. Oyebisi ◽  
Cordelia O. Osasona
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Coarse Aggregate ◽  
Strength Properties ◽  
Partial Replacement ◽  
Concrete Construction ◽  
Conventional Concrete ◽  
Waste Tyre ◽  
Rubber Aggregates

This research studied strength-characteristics of concrete using waste tyre-rubber as partial replacement for coarse aggregate in concrete construction and compares the results to those of conventional concrete. The specimens were produced with percentage replacements of the coarse aggregate by 5%, 10% and 15 % of rubber aggregate. A control mix with no replacement of the coarse aggregate was produced, to make a comparative analysis. The samples consisted of concrete cubes, cylinders and beams. Various tests (such as slump, compressive strength, splitting tensile strength and flexural strength tests), were conducted. Data-collection was mainly based on the results of the tests conducted on the specimens in the laboratory. The results show that there is a reduction in the compressive strength of the concrete, due to the inclusion of rubber aggregates. Compressive strength losses of 12.69%, 17.75% and 25.33% were noticed for 5%, 10%, 15% replacement of coarse aggregate, respectively; tensile strength losses of 13.01%, 20.12%, and 24.76% were observed, respectively, when 5%, 10%, 15% of the coarse aggregate was replaced, after 28 days of curing; -0.1%, -0.15% and 0.2% decrease in flexural strength was observed for 5%, 10% and 15% replacement, respectively, after curing for 28 days. Rubberised concrete was found to have some desirable characteristics (such as lower density, enhanced ductility, and a slight increase in flexural strength in the lower compressive strength concrete categories). The overall results show that it is possible to use recycled rubber tyres in concrete construction, as a partial replacement for coarse aggregates. Nevertheless, the percentage of replacement should be limited to 10% (which ensures the strength of the concrete is kept within the required range), and the application should be restricted to particular cases where the properties related to the replacement with the rubber aggregates clearly indicate an improvement on conventional concrete, and so are desirable.

scholarly journals Resistance of Acid Attack on Geopolymer Concrete Developed with Partial Replacement of Course Aggregate by Recycled Aggregate

2019 ◽  
Vol 8 (4) ◽  
pp. 12142-12146
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Recycled Aggregate ◽  
Partial Replacement ◽  
Geopolymer Concrete ◽  
Acid Attack ◽  
Great Strength ◽  
Conventional Concrete ◽  
Existing Structures ◽  
Binder Material

Geopolymer concrete is one of the major developments in recent years resulting in utilization of fly ash in huge quantities and eventually reducing cement consumption and ultimately reducing emission of greenhouse gases.The geopolymer concrete is produced by using activated fly ash as binder material instead of cement. Geopolymer concrete accomplishes great strength and looks similar to conventional concrete. Recycled coarse aggregate (RCA )which is coming from demolition of construction of old and existing structures has been used in this study. The durability property; acid attack resistance with partial replacement of coarse aggregate by recycled aggregate in geopolymer and conventional concrete for the different composition such as 10, 20, 30 and 40percentage for a period of 15, 45,75 and 105 days has been evaluated. From the results it was observed that in both natural and recycled aggregate of Geopolymer concrete is highly resistant to acids such as sulphuric acid and hydrochloric acid compared to conventional concrete of respective aggregates.

scholarly journals Comparison of Conventional Concrete and Replacement of River Sand by Waste Foundry Sand and Cement by Nano-Silica

2020 ◽  
pp. 201-205
Keyword(s):  
Experimental Investigation ◽  
Compressive Strength ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Nano Silica ◽  
River Sand ◽  
Conventional Concrete ◽  
Foundry Sand ◽  
Concrete Production ◽  
Waste Foundry Sand

This paper presents an experimental investigation on the properties of concrete in which like cement is partially replacing by used nano silica and is partially replacing by used waste foundry sand. Because now a day the world wide consumption of sand as cement and as fine aggregate in concrete production is very high. Nano silica and waste foundry sand are major by product of casting industry and create land pollution. The cement will be replaced with nano silica and the river sand will be replaced with waste foundry sand (0%, 5%, 10%, 15%, 20%). This experimental investigation was done and found out that with the increase in the nano silica and waste foundry sand ratio. Compression test has been done to find out the compressive strength of concrete at the age of 7, 14, 21, and 28. Test result indicates in increasing compressive strength of plain concrete by inclusion of nano silica as a partial replacement of cement and waste foundry sand as a partial replacement of fine aggregate.

scholarly journals PARTIAL REPLACEMENT OF CEMENT BY COFFEE HUSK ASH FOR C-25 CONCRETE PRODUCTION

2019 ◽  
Vol 10 (1) ◽  
pp. 12-21
Author(s):  
Abebe Demissew ◽  
Fekadu Fufa ◽  
Sintayehu Assefa
Keyword(s):  
Environmental Problem ◽  
Partial Replacement ◽  
Test Machine ◽  
Compressive Test ◽  
Conventional Concrete ◽  
Co2 Gas ◽  
Coffee Husk ◽  
Water To Cement Ratio ◽  
Concrete Production ◽  
Different Levels

Concrete is a mixture of aggregates and binders. From concrete ingredients, the binder and the costliest and environmental-unfriendly element is cement, which is an ecological unsociable process due to the discharge of CO2 gas into the atmosphere and ecological degradation. Coffee husk (CH) has been considered as a category of agriculture by-product; as its quantity rises, the disposal of it is becoming an environmental problem. Hence, this study investigated the suitability of coffee husk ash (CHA) as a partial replacement for ordinary Portland cement (OPC) in conventional concrete production. Initially, CH samples were collected from different coffee treatment centres. The CHA was then ground and its chemical and physical properties were investigated using Atomic Absorption Spectrophotometer method. After that, the pastes containing OPC and CHA at different levels of replacement were investigated. For this purpose, six different concrete mixes with CHA replacement 0, 2, 3, 5, 10, and 15% of the OPC were prepared for 25MPa conventional concrete with water to cement ratio of 0.5 and 360 kg/m3 cement content. The results of the study show that, up to 10% replacement of OPC by CHA achieved advanced compressive strength at all test ages, i.e. 7, 14, and 28 days of age using compressive test machine.

scholarly journals Suitability of Scoria as Fine Aggregate and Its Effect on the Properties of Concrete

2019 ◽  
Vol 11 (17) ◽  
pp. 4647 ◽  
Author(s):  
Warati ◽  
Darwish ◽  
Feyessa ◽  
Ghebrab
Keyword(s):  
Construction Materials ◽  
Energy Utilization ◽  
Engineering Properties ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Test Results ◽  
River Sand ◽  
Conventional Concrete ◽  
Efficient Energy ◽  
Concrete Production

The increase in the demand for concrete production for the development of infrastructures in developing countries like Ethiopia leads to the depletion of virgin aggregates and high cement demand, which imposes negative environmental impacts. In sustainable development, there is a need for construction materials to focus on the economy, efficient energy utilization, and environmental protections. One of the strategies in green concrete production is the use of locally available construction materials. Scoria is widely available around the central towns of Ethiopia, especially around the rift valley regions where huge construction activities are taking place. The aim of this paper is therefore to analyze the suitability of scoria as a fine aggregate for concrete production and its effect on the properties of concrete. A differing ratio of scoria was considered as a partial replacement of fine aggregate with river sand after analyzing its engineering properties, and its effect on the mechanical properties of concrete were examined. The test results on the engineering properties of scoria revealed that the material is suitable to be used as a fine aggregate in concrete production. The replacement of scoria with river sand also enhanced the mechanical strength of the concrete. Generally, the findings of the experimental study showed that scoria could replace river sand by up to 50% for conventional concrete production.

scholarly journals Strength and Permeation Property of Concrete Made With Sugarcane Bagasse Ash and Granite Waste as Fine Aggregate Replacement

2019 ◽  
Vol 8 (3) ◽  
pp. 1982-1988
Keyword(s):  
Sugarcane Bagasse ◽  
Particle Packing ◽  
Industrial Wastes ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
River Sand ◽  
Conventional Concrete ◽  
Waste Concrete ◽  
Concrete Production ◽  
Sugarcane Bagasse Ash

Use of agro and industrial wastes in concrete production will cause sustainable concrete era and greener habitat. In this study an endeavor has been made to discover the propriety of Sugarcane Bagasse Ash (SCBA) and Granite Waste (GW) as partial replacement for traditional river sand. The percentage substitute is calculated based on the particle packing approach. The properties such as compressive, splitting tensile, flexural strengths and modulus of elasticity, water absorption, sorptivity and rapid chloride penetration test of the concrete with bagasse ash and granite waste as a partial replacement for river sand and to evaluate them with those of conventional concrete made with river sand fine aggregate are investigated. The test results show that the strength aspects of bagasse ash-granite waste concrete are higher than those of the conventional concrete. Moreover, they suggest that the bagasse ash-granite waste concrete has higher strength characteristics and remains in the lower permeability level shows improvement in overall durability of concrete than the conventional concrete.

scholarly journals Mechanical Properties of Fly Ash Based Geopolymer Concrete and Conventional Concrete

2020 ◽  
Vol 8 (6) ◽  
pp. 3121-3127
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Personal Satisfaction ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Conventional Concrete ◽  
The World ◽  
Water Right ◽  
The Creation

Creation of concrete includes devouring of common non-sustainable assets. The concrete ventures have been ordered as profoundly dirtying enterprises. It is relevant to utilize eco-accommodating strategies in a manner to supplant, lessen or reuse the customary materials to be utilized in cements (Portland Cement Concrete). Solid utilization is underdog to water right now. Normal Portland concrete is ordinarily utilized as basically fastener to create concrete because of its accessibility of the crude materials everywhere throughout the world. The use of cement has extraordinarily affected the cutting edge world in framework, home and transportation, advancing the improvement of monetary advancement, human advancement and personal satisfaction. The natural issues related with the creation of OPC is notable, the measure of carbon dioxide discharged during the production of OPC because of calcinations of limestone and ignition of non-renewable energy sources is high. It is well kwon truth that creation of 1 kg of concretes delivers almost 1 kg of carbon dioxide. The degree of vitality required to deliver OPC is just beside steel and Aluminum so there is a need to conserve concrete. One of the solid answers for conserve concrete is to supplant with other strengthening establishing materials like fly debris, slag, meta kaolin, and so on then again the bottomless accessibility of fly debris, which being a side-effect of coal-based force plants the world over making a chance to enhance to OPC with fly debris. The all out creation of fly debris is almost as same as concrete, however our use of fly debris is just 5% of the creation, subsequently the utilization of fly debris ought to be improved.

scholarly journals Study of Light Weight Fibre Reinforced Concrete by Partial Replacement of Coarse Aggregate with Pumice Stone

2021 ◽  
Vol 9 (9) ◽  
pp. 933-940
Author(s):  
Mohammed Sohel Ahmed
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Light Weight ◽  
Structural Members ◽  
Conventional Concrete ◽  
Shrinkage Cracking ◽  
Pumice Stone ◽  
Average Compressive Strength

Abstract: As the demand for the structural members application in the concrete industry is continuously increasing simultaneously many a times it is required to lower the density of concrete enabling light weight which helps in easy handling of the concrete and its members. In this research an experimental endeavour has been made to equate conventional concrete with light weight by partially substituting the coarse aggregate with the pumice stone aggregate in M30 grade mix design. Simultaneously small fibres of Recron3's Polypropylene have been applied to the concrete as a reinforcing medium to minimize shrinkage cracking and improve tensile properties. The coarse aggregate was substituted by the pumice aggregate in 10, 20, 30, 40, and 50 percent and fibres respectively in 0.5, 1, 1.5, 2 and 2.5 percent. The experiment is focused on strength parameters to determine the most favourable optimum percent with respect to conventional concrete. Keywords: OPC (Ordinary Portland Cement)1, FA (Fine Aggregate)2, CA (Coarse Aggregate) 3, fck (Characteristic Compressive Strength at 28days)4, Sp. Gr (Specific Gravity)5, WC (Water Content)6, W/C (Water Cement Ratio)7, S (Standard Deviation)8, Fck (Target Average Compressive Strength at 28days)9.

scholarly journals A Sustainable Study on Permeable Concrete using Bagasse Ash and Rice Husk Ash as a Partial Replacement of Cement

2020 ◽  
Vol 184 ◽  
pp. 01083
Author(s):  
Dr. Vanathi ◽  
Dr.K Radhika ◽  
Ms. G. Swetha
Keyword(s):  
Rice Husk ◽  
Surface Runoff ◽  
Water Surface ◽  
Void Ratio ◽  
Coarse Aggregate ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Conventional Concrete ◽  
Strength And Durability ◽  
Day By Day

Permeable concrete is a special concrete which consists of cement, coarse aggregate and water. Due to rapid growth of globalization and urbanization, the construction of concrete roads increasing day by day which leads to decrease in percolation of storm water, surface runoff occurring to the decrease in ground water table. In previous concrete, single sized aggregate is used to maintain the void ratio in the concrete. The cement paste is bonded with aggregate with a void ratio of 20%. In this investigation, concrete of M20 grade with water cement ratio of 0.38 is used. The properties of concrete were increased by using Rice husk ash and Bagasse ash in changed percentages (10%, 20%, 30%) by weight of cement and with the combination of rice husk ash and bagasse ash 10% (5%RA + 5%BA), 20%(10%RA+10%BA), 30%(15%RA+15%BA) are used. The compressive strength of cubes, split tensile of cylinders are casted, tested after 7 days and 28 days. After testing, the optimum percentages of replacement of admixtures are found in the Permeable concrete. Therefore the strength and durability properties of permeable concrete with the addition of bagasse ash and rice husk ash with partial replacement of cement are compared with conventional concrete.

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