scholarly journals Performance of Light Weight Concrete with Coconut Shell and Fly Ash

2021 ◽  
Vol 9 (9) ◽  
pp. 1119-1127
Author(s):  
Vani Kulkarni
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Coconut Shell ◽  
Partial Replacement ◽  
Light Weight ◽  
Conventional Concrete ◽  
Concrete Cylinders ◽  
Light Weight Concrete ◽  
Failure Loads ◽  
Cost Of Materials

Abstract: The major factor that affects the housing delivery is high cost of materials for any conventional concrete. This has lead to find an alternative. An attempt has been made to find an alternative by using partial replacement of coarse aggregate by coconut shell aggregate and cement by fly ash. This report provides the information obtained from a literature search. And also provides laboratory experiments on Cement, Sand, Coarse aggregate and Coconut shell. This project is done using partial replacement of coarse aggregate by coconut shell aggregate and cement by fly ash.10 % of fly ash was kept constant as replacement for cement. And Coarse aggregate was replaced by 5%, 10%, 15%, and 20% of coconut shell aggregate.30 concrete cubes of 150x150x150 mm size were casted and 3 cubes were tested after 7 days of curing and 3 cubes were tested after 28 days of curing for each percentage.30 concrete Cylinders of 150x300 mm size were casted and 3 Cylinders were tested after 7 days of curing and 3 Cylinders were tested after 28 days of curing for each percentage.15 concrete Beams of 100X100X500 mm size were casted and 3 beams were tested after 28 days of curing for each percentage. Two models were done using ANSYS Software using the same failure loads from the experimental part. Keywords: Light weight concrete, coconut shell, Fly-ash, experimental.

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 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 Application of Light Expanded Clay Aggregate as Replacement of Coarse Aggregate in Concrete Pavement

2018 ◽  
Vol 7 (4.2) ◽  
pp. 1
Author(s):  
Pavithra A ◽  
Jerosia De Rose D
Keyword(s):  
Coarse Aggregate ◽  
Mineral Admixture ◽  
Maintenance Cost ◽  
Light Weight ◽  
Conventional Concrete ◽  
Coarse Aggregates ◽  
Light Weight Concrete ◽  
Clay Aggregates ◽  
Light Weight Aggregate ◽  
Effect Of Light

The main aim of this project is to develop a light weight concrete (LWC) by replacing the coarse aggregate with light weight expanded clay aggregate. The damage caused in LWC is less significant than conventional concrete and therefore the maintenance cost is also reduced. In order to understand the effect of light weight aggregate in concrete, conventional concrete of strength 30MPa was designed with the density of 2400 kg/m3. Then the natural coarse aggregates were replaced by clay aggregates and light weight concrete mix of density 1800 kg/m3 was designed to meet the desired strength requirement. As the density of the concrete tends to be lowered, the strength of the concrete may also tend to decrease. Hence suitable chemical and mineral admixture is to be incorporated in addition to significant water reduction to meet the strength requirement. Cement content kept constant in both the cases. The details of mechanical properties and durability properties of conventional and light weight concrete are reported in this paper. 

scholarly journals Durability Characteristics of Ceramic Waste based Light Weight Concrete

2018 ◽  
Vol 7 (3.12) ◽  
pp. 369 ◽  
Author(s):  
Madhumitha. S ◽  
Dhinakaran. G
Keyword(s):  
Construction Industry ◽  
Coarse Aggregate ◽  
Light Weight ◽  
Ceramic Tiles ◽  
Conventional Concrete ◽  
Ceramic Waste ◽  
Production Stage ◽  
Light Weight Concrete ◽  
Durability Performance ◽  
Disposal Problem

Ceramic waste powder (CWP) is one waste material produced during cutting of ceramic tiles. CWP is rich in silica and alumina and is a fine material. Due to generation of more such waste it is mandatory to make use such material effectively in construction industry to minimize the disposal problem and also to reduce production of cement. Use of such material will minimize the carbon foot print in production stage of concrete. LECA is a light weight expanded clay aggregate could be used as substitute to natural coarse aggregate which is energy intensive. In this study, CWP is partially substituted for cement and LECA is partially substituted for natural coarse aggregate. CWP was used from 10 to 30% and LECA was used from 20 to 40%. All the mix combinations were subjected to durability studies namely sorptivity and porosity to study the effectiveness of enhancement on the performance of admixed light weight concrete. All the tests are performed as per ASTM standards. The durability performance of admixed concrete with ceramic waste and LECA aggregate are compared with results of conventional concrete.  

scholarly journals Investigation on Mechanical properties of Partial replacement of Saw-Dust to Fine-Aggregate in Coconut-Shell Concrete

2018 ◽  
Vol 7 (2.12) ◽  
pp. 415
Author(s):  
Anandh S ◽  
Gunasekaran K
Keyword(s):  
Solid Waste ◽  
Coconut Shell ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Light Weight ◽  
Coconut Fiber ◽  
Conventional Concrete ◽  
Saw Dust ◽  
Fine Aggregates ◽  
Concrete Production

Concrete is the major composite material used in construction industry, it is strong in Compression and weak in tension and also has high self-weight. The light weight concrete was a alternative to conventional concrete due its low weight it decreases the self weight. Comparatively by using the light weight materials that occur either naturally or industrial waste, these material helps in reducing the cost and to improve the performance. Presently in India, more than 960 million tones of solid waste were being generated annually as by-products during industrial, agricultural mining and other processes. This paper deals with coconut shell concrete, which is one of the solid waste in the environment, and the use of this coconut shell as a replacement to coarse aggregate will reduce the weight of concrete by 25%. The other waste that was disposed mostly was sawdust. It was a byproduct of cutting or drilling of wood with saw or other tool. It is composed of fine particles of wood. It is having many advantages over traditional concrete like low bulk density, better heat preservation and heat insulation property. As said earlier to make concrete strong in tension coconut fiber is added, which is a waste material that left to disposal and as it is strong and stiff will hold the concrete material and also controls the crack. This study investigates on the use of sawdust as partial replacement for fine aggregates in concrete production. Sawdust was used to replace fine aggregates in Conventional and as well as in Coconut Shell concrete from 0%, 5%, 10% and 20%. M25 grade of concrete was selected and testing is evaluated at age of 3, 7 and 28 days. From the results, increase in percentage of saw-dust in concrete cubes led to corresponding reduction in compressive strength values, and the optimum saw-dust content was obtained at 5% in conventional as well as in coconut shell concrete , coconut fiber was added at the optimum value of sawdust on conventional and coconut shell concrete at 1%,2%,3%,4% and 5%. The better strength was obtained at 2% addition of fiber in coconut shell concrete and at 3% addition in conventional concrete. 

scholarly journals Strength Characteristics of Ternary Mix of Cement in Light Weight Concrete

2018 ◽  
Vol 7 (3.12) ◽  
pp. 880
Author(s):  
V Vishnu Priya ◽  
P Bhuvaneswari ◽  
K Saravana Raja Mohan
Keyword(s):  
Coarse Aggregate ◽  
Strength Properties ◽  
Mineral Admixtures ◽  
Light Weight ◽  
Replacement Level ◽  
Dead Load ◽  
Split Tensile Strength ◽  
Conventional Concrete ◽  
Light Weight Concrete ◽  
Hardened Properties

The main aim of this study is to decrease the density and the dead load of the structure by using Light weight concrete (LWC). In this study Pumice aggregate was replaced with the conventional coarse aggregate. To enhance the strength of the concrete, cement was partially replaced with mineral admixtures, Ground Granulated Blast Slag (GGBS) and Metakaolin (MK).  The constant replacement level of cement with 30% GGBS and 15% Metakaolin was followed for all the mixes.  The natural aggregate has been replaced with pumice from 10% to 50% in the increment of 10%. A total of six combinations were cast. Hardened properties of the concrete were evaluated by conducting compressive strength (100 mm x 100 mm x 100 mm cubes), split tensile strength (cylinder of size 100 mm x 200 mm). In order to enhance the strength properties, cement has been replaced with GGBS and MK at certain replacement levels. The strength properties of light weight concrete samples and the conventional concrete samples were carried out. 

scholarly journals Cement Partially Replaced With Fly Ash and Carbon Fiber in Light Weight Concrete

2019 ◽  
Vol 8 (3) ◽  
pp. 517-521
Keyword(s):  
Fly Ash ◽  
Carbon Fiber ◽  
Strength Properties ◽  
Low Density ◽  
Percentage Increase ◽  
Light Weight ◽  
Normal Concrete ◽  
Conventional Concrete ◽  
Plastic Shrinkage ◽  
Light Weight Concrete

Mechanical Strength properties of fiber reinforced light weight concrete are investigated and studied with normal concrete. Four concrete mixes were taken in different percentages of fly ash, carbon fiber and LECA. Fifty-Four cubes (six for each mixes) and Thirty six cylinders (four for each mixes) were tested. The investigation include 7 and 28 days of strength properties of concrete mixes. As the increase in percentage of fly ash and carbon fiber the compressive and split tensile values were decreased and vice versa. Light weight concrete gives low density than conventional concrete. Plastic shrinkage crack decreases with the percentage increase of LECA (Light Weight Expanded Clay Aggregate)

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