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aggregate and coarse aggregate respectively was prepared for each sample. For replaced samples, different percentages of fine and coarse aggregates were replaced by waste glass and the coconut shell respectively. The water/cement ratio was kept as for all mixes. The proportioned mix was
the coconut shell as aggregate found out that by replacing 50% aggregate by broken coconut shells there is a reduction in cost between 9% to 11% and small reduction of strength between 10% to 20% [5]. Some researchers have used coconut shells as a partial replacement of coarse aggregate and found out that as the percentage
USE OF COCONUT SHELL AS COARSE AGGREGATE AND FLY ASH AS FINE AGGREGATE IN CONCRETE A PROJECT Submitted in partial fulfillment of the requirements for the award of the degree of BACHELOR OF TECHNOLOGY IN CIVIL ENGINEERING Under the supervision of GALI (Professor) and DR. ASHISH KUMAR (Associate Professor) By RAHUL KANDPAL (121603)
Maninder Kaur Manpreet Kaur (2012), A review on utilization of coconut shell as coarse aggregate in mass concrete, International journal of applied engineering research,
Coconut shell's nature is high in absorbing the water [6]. Water permeability of coconut shell concrete is directly proportional to the percentage substitution of aggregate with coconut shell [5][6][7]. The workability of coconut shell concrete can be increased by using fly ash to replace cement or aggregate[6][7][8].
This paper centers around the study of physical and mechanical properties of concrete reinforced with coconut fibre and the coarse aggregates of which are partially replaced with coconut shells. American Concrete Institute (ACI) method has been used to design M20 concrete wherein coconut shells (CS) replaced the coarse aggregates (CA) by 6%, 8%, 10%, 12% and 14% by volume.
4. According to R. Nagalakshmi, M25 grade of concrete with cement replaced by fly ash and coarse aggregate by coconut shell and find its compressive, tensile strength. 5. According to Sabarudin Bin Mohd, he replaced coconut shell and palm kernel shell in place of coarse aggregate in concrete in 0,25,50,75 and 100 % replacement.
source of structural aggregate material. It is becoming more difficult to find natural resources. Therefore the coconut shell as partial replacement for coarse aggregate in concrete is studied. The density, slump and compressive strength of concrete are tested. The replacement of coarse aggregate by coconut shell by 0%, 10%, 20% and 30%.
total coarse aggregate 14 Compressive strength versus Duration of curing at 80°C 34 Compressive strength versus Duration of curing at 100°C 35 Compressive strength versus Duration of curing at 120°C 36 Flow chart 39 PHOENIX Cement 41 Sand 42 Coarse aggregate 43 Coconut shell powder 44
The result shows that, the concrete streneth is not significantly affected when the cement is replaced by 5%, 10%, and 15% of the mixture of seashell ash and husk ash, However with 20% cement replacement by waste material, the concrete strength decrease at all ages. Key word : Husk Ash, SeaShell Ash, Concrete strength 1, INTRODUCTION
· The coarse aggregate content was replaced by CSA in the gradation of 0%, 25%, 50%, 75% and in the designated SCC. The investigation revealed that the bond and impact strength of CSA based LWSCC were comparable to current code practice and other lightweight concretes.
· Asphalttreated base (ATB25) is a widely used flexible base material. The composition and gradation of mineral aggregate are important factors affecting pavement performance of asphalt treated base. In this study, two new methods were proposed to address the problems of existing aggregate proportion calculation for asphalt mixtures: (1) the combination of generalized inverse solution of the ...
Physical Properties of Aggregates 4 Coarse Aggregate Angularity • Measured on + mm material • Based on fractured faces – fractured surface larger than 25% of aspect ratio • ASTM D 5821 • Specifiion requirements depend on: – depth of layer within pavement
As a result, the total magnitude of the ion–protein dispersion interaction in xDLVOCG is obtained by the integration of contributions of all ions, placed in the spherical shell around the protein: (21) where R p is the protein radius, σ is the water layer around a protein, D is a maximum thickness of a shell at which ion–protein interactions are considered (see Fig. 1b) and B a, B c are ...
In this research, coarse aggregates are used as a substitute and are replaced by 20%, 40%, 60%, 80% and of coconut shell. Design mix incorporated is M40 grade and the testing of specimens was conducted after 7 and 28 days of curing. Keywords: Coarse Aggregate, Coconut Shell, Compressive Strength, Density, Waste Utilization I. INTRODUCTION
