Influence of Neem Seed Husk Ash on The Tensile Strength of Concrete (original) (raw)
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Effect of Neem Seed Husk Ash on Concrete Strength Properties
Nigerian Journal of Technology, 2014
Neem Seed Husk is a by Neem Seed Husk is a by Neem Seed Husk is a by Neem Seed Husk is a by-product obtained during industrial processing of Neem Seed to extract oil and produce product obtained during industrial processing of Neem Seed to extract oil and produce product obtained during industrial processing of Neem Seed to extract oil and produce product obtained during industrial processing of Neem Seed to extract oil and produce fertilizer fertilizer fertilizer fertilizer.. .. Laboratory tests on Laboratory tests on Laboratory tests on Laboratory tests on Neem seed husk ash Neem seed husk ash Neem seed husk ash Neem seed husk ash concrete concrete concrete concrete strength strength strength strength and workability and workability and workability and workability.. .. Tests including slump Tests including slump Tests including slump Tests including slump scanning electron microscope (SEM) were scanning electron microscope (SEM) were scanning electron microscope (SEM) were scanning electron microscope (SEM) were and 25 and 25 and 25 and 25% % % %NSHA NSHA NSHA NSHA and presented. and presented. and presented. and presented. The test results indicate that concrete The test results indicate that concrete The test results indicate that concrete The test results indicate that concrete replacement replacement replacement replacement by by by by increase in the slump at 5% and 10% replacements. But it decreases the slump at 15%, 20% and increase in the slump at 5% and 10% replacements. But it decreases the slump at 15%, 20% and increase in the slump at 5% and 10% replacements. But it decreases the slump at 15%, 20% and increase in the slump at 5% and 10% replacements. But it decreases the slump at 15%, 20% and 25% replacements. 25% replacements. 25% replacements. 25% replacements. At 28 days curing, only the control (0 At 28 days curing, only the control (0 At 28 days curing, only the control (0 At 28 days curing, only the control (0 compressive strength compressive strength compressive strength compressive strength and therefore can be used for non and therefore can be used for non and therefore can be used for non and therefore can be used for non most of the cubes partially replaced with NSHA are generally higher than that of the control concrete most of the cubes partially replaced with NSHA are generally higher than that of the control concrete most of the cubes partially replaced with NSHA are generally higher than that of the control concrete most of the cubes partially replaced with NSHA are generally higher than that of the control concrete supported by the SEM. supported by the SEM. supported by the SEM. supported by the SEM. which indicates that NSHA act as filler and occupy the voids between the aggregates, thereby which indicates that NSHA act as filler and occupy the voids between the aggregates, thereby which indicates that NSHA act as filler and occupy the voids between the aggregates, thereby which indicates that NSHA act as filler and occupy the voids between the aggregates, thereby making the concrete more compact and having higher densities. making the concrete more compact and having higher densities. making the concrete more compact and having higher densities. making the concrete more compact and having higher densities. requirement of B requirement of B requirement of B requirement of British standard ritish standard ritish standard ritish standard for normal for normal for normal for normal
A Study of Neem Seed Husk Ash as Partial Replacement for Cement in Concrete
International Journal of Sustainable Construction Engineering and Technology
The production of neem products from neem tree generates large quantity of waste annually. There is need to reduce environmental pollution resulting from neem seed covering. Therefore, the use of Neem Seed Husk Ash (NSHA) as partial substitution for cement in concrete was investigated. Neem seed husk was obtained from Bishop Smith Memorial College, Ilorin, Nigeria; sundried for 3 days and then calcined at 650 o C. The calcined neem seed husk was ground and sieved using 200 μm sieve to obtain NSHA. Pozzolanicity test was conducted on NSHA to determine its chemical composition. Concrete was produced with 5, 10, 15, 20 and 25% by weight of NSHA substitution for ordinary Portland cement. Workability tests (slump and compacting factor) were performed on fresh concrete while compressive strength test was conducted on 150 mm cubes at ages 3, 7, 14, 21, 28, 56, 90 and 180 days for the hardened concrete. NSHA mainly comprises Al2O3, SiO2 and Fe2O3 with a combined percentage of 75.35%. The slump and compacting factors of NSHA concrete ranged from 5.50 mm to 10.00 mm and 0.91 to 0.95, respectively. The compressive strength at 180 days decreased from 26.9 N/mm 2 to 19.4 N/mm 2 as the NSHA content increased from 5% to 25%. Only 5% NSHA substitution is adequate to enjoy maximum benefit of strength gain.
Materials, 2020
High temperature rise mostly caused by a fire outbreak is currently becoming a threat that endangers concrete's structural performance for buildings and the safety of occupants. The behavior of concrete after fire subjection has been of much interest for the structural materials design purposes. This study investigated the physical properties and the compressive strength of M25 concrete incorporating Neem Seed Husk Ash (NSHA), exposed to and through targeted different levels of temperature (200 • C to 800 • C) for a period of three hours in an electric furnace. The NSHA was produced by calcining neem seed husks at 800 • C for six hours and then sieved through the 125 µm sieve. Different amounts of NSHA were investigated while considering the plain concrete as the control sample. 150 concrete cubes of 150 mm sizes were cast and properly cured for 7 and 28 days. The experimental results show that the compressive strength of the 5% NSHA concrete exposed to temperatures up to 400 • C is 21.3% and 23.8% better than the normal concrete at 7 and 28 curing days, respectively. Surface cracks and spalling are noticeable at 600 • C and 800 • C for all samples considered in this study.
MULTISCALE CHARACTERIZATION OF NEEM SEED HUSK ASH CONCRETE
Current research in concrete Science and Technology is modelled towards the multiscale characterization of concrete produced from binary blended cement paste with a view of optimizing concrete performance using minimal cement content by blending the cement with a secondary cementitious material. The use of multiscale characterization has revealed interesting properties of concrete that can form the basis for the re-engineering of concrete to maximize its benefits and use. This current paper studied the properties of Neem seed Husk Ash (NSHA) at the macro, micro and nano scales by investigating the physico-chemical, micro-structural and nanomechanical properties using compressive strength test, XRF and SEM analysis as well as a nonaindentation technique, which was used to characterize the hardness, modulus of elasticity, C-S-H content and porosity of the cement paste. It has been concluded from the study that the effect of the addition of 10% NSHA to cement paste on the properties of concrete cured for 28 days at the macro, micro and nano scales correlate well. It is recommended that multiscale characterization of cementitious materials provides the best insight into pozzolanic concrete behaviour and should be adopted for designing of pozzolanic concrete for optimal performance.
Effect of Rice Husk Ash and Water-Cement Ratio on Strength of Concrete
In present status quo, number of researcher are working on waste materials as potential supplement for any of the constituent of concrete to cope with sustainable development. As, the ingredients which constitute the body and give strength to concrete are natural available limited material and has to deplete one day. Thus, there is desperately need of alternate that may replace the limited natural resources. In this regard, this study focuses the rice husk ash (waste stuff) as partial replacement of cement and its possible impact on strength of concrete. In addition, this research work also this research work is conducted to investigate the effect of water-cement ratio on the strength of concrete at 10% partially replacement of Rice husk ash (RHA) by the weight of cement. RHA is a mineral admixture obtained by burning husk at certain temperature. Since as per pervious researches, the physical and chemical properties of RHA are very reactive Pozzolans and possess binding properties so can be used as cement supplement. Therefore, for laboratory experimental work, total 144 cubical and 72 cylindrical. In this research, number of concrete specimens were cast and tested at 1:2:4 mix ratio with various w/c ratios i.e. 0.45, 0.50 and 0.60. Further, at each specified water-cement ratio, two mechanical properties (compressive and splitting tensile strength) were determined in Universal Testing Machine (UTM). These physical properties of concrete were investigated at 7, 14, 28 and 56 days curing period. The experimental results show that the compressive strength gets increased up to 14.51% and tensile splitting test strength increased up to 10.71% at the w/c ratio of 0.45. The workability of plain fresh concrete at all w/c ratios is slightly greater than the workability of concrete blended with 10% RHA. Thus, RHA improves the properties of concrete when used in specific amount. As a result, it can reduce the overall cost of construction and it will reduce the adverse environmental effect.
Concrete is very wide topic in civil engineering field. Modification of concrete is very essential for eco-friendly environment for present scenario. Show we are using agricultural waste in concrete to modify the concrete and to reduce problems of waste disposal and land utilization for waste. The agricultural wastes which are used in this project:-i). Coconut shell ii). Rise husk ash Coconut shells are by-products of coconut oil production. Coconut shells are used in the production of activated carbon due to hardness and high carbon content. Concrete using Coconut Shell aggregates resulted in acceptable strength required for structural concrete. Coconut Shell may offer itself as a coarse aggregate as well as a potential construction material in the field of construction industries and this would solve the environmental problem of reducing the generation of solid wastes simultaneously.. The impact resistance of Coconut Shell concrete is high when compared with conventional concrete. Moisture retaining and water absorbing capacity of Coconut Shell are more compared to conventional aggregate. Cost reduction of 40% can be achieved if coconut shells are used to replace gravel in concrete. The amount of cement content may be more when Coconut Shell are used as an aggregate in the production of concrete compared to conventional aggregate concrete. Thus cement can also be replaced by rice husk ash which is an agricultural waste to make it low cost material. Rice husk ash (RHA) is a by-product from the burning of rice husk. This husk contains about 75 % organic volatile matter and the balance 25 % of the weight of this husk is converted into ash during the firing process, is known as rice husk ash (RHA). This RHA in turn contains around 85 %-90 % amorphous silica. Thus Rise husk is replaced partially by cement and Coconut shell is replaced by aggregate in various proportions. Then the concrete specimen is compared by testing on 7th, 14th and 28th day with water cement ratio of 0.5. Compressive strength tensile strength, workability, etc. will be shown in result. According to result of RHA moulds and coconut shell moulds the ratios are formed for using RHA and coconut shell together in concrete.
Strength analysis of concrete by partial replacement of cement with agricultural waste ash
2018
This paper presents the studies conducted to know the strength characteristics of cement concrete made with Ordinary Portland Cement (OPC) and two agro wastes i.e. Rice Husk Ash (RHA) and Groundnut Husk Ash (GHA). Cubes were casted with percentage replacement of both ashes of 0, 2.5, 5, 7.5, 10 and 12.5%. The Chemical analysis was carried out to know pozzolana properties of GHA and RHA. It was observed that slump and density decreases from 70 mm to 27 mm and 2440 Kg/m to 2237 Kg/m respectively. Compressive strength also decreases with respect to control mix except for 10% replacement. Scanning Electron Microscopy (SEM) and Chemical analysis in micro areas Energy Dispersive X – ray Spectrometry (EDS) analysis was also done to track the phase changes and microstructure of mature concrete. It was found from the results and observations that 10% replacement of cement with GHA – RHA is suitable in concrete for construction. Index Terms GHA – RHA, Scanning Electron Microscopy, Pozzolana, ...
“THE EFFECT OF RICE HUSK ASH ON STRENGTH PROPERTIES OF CONCRETE” An Experimental Study
2018
1M. Tech Scholar, Jagannath University, Jaipur (Rajasthan), India 2Asst.Professor,Department of Civil Engineering, Jagannath Gupta Institute of Engineering & Technology, Jaipur (Rajasthan), India 3Professor,Department of Civil Engineering, Jagannath Gupta Institute of Engineering & Technology, Jaipur (Rajasthan), India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Portland cement is the most important ingredient of concrete and is a versatile and relatively high cost material. Large scale production of cement is causing environmental problems on one hand and depletion of natural resources on other hand. This threat to ecology has led to researchers to use industrial by products as supplementary cementations material in making concrete. Background/Objective: The research was carried out to study the mechanical properties of concrete by partial replacement of cement with rice husk as...
Indian Rice Husk Ash – Improving the Mechanical Properties of Concrete: A Review
The objective of this paper is to study a review of Indian Rice Husk Ash (RHA) as a partial cement replacement in different percentage and performance of strength and durability of RHA blended concrete. The demand for producing durable construction material is the result of the environmental pollution. Supplementary cementitious materials prove to be effective to meet most of the requirements of durable concrete, RHA is available in plenty to other supplementary materials like silica fume and fly ash, Due to its high pozzolanic activity, and the strength and durability of concrete are improved. This paper presents an over view of the work carried out on the use of Indian RHA to improve the strength and durability of concrete
Split Tensile Strengths of Concrete Incorporating Rice Husk Ash and SawDust Ash
Journal of Multidisciplinary Engineering Science and Technology (JMEST) ISSN: 2458-9403 Vol. 3 Issue 7, 2016
This work investigated the split tensile strengths of concrete containing rice husk ash (RHA) and saw dust ash (SDA). RHA and SDA were obtained from open air calcination. Ordinary Portland cement (OPC) was partially replaced with each of RHA, SDA, and RHA-SDA at 5%, 10%, and 15%. Nine concrete cylinders of dimensions 150×300mm were produced using 100% OPC. Eighty one concrete cylinders also of dimensions 150×300mm were similarly produced for each of the percentage replacement of OPC with RHA, SDA, and RHA-SDA, making a total of 252 concrete cylinders. The concrete cylinders were cured by immersion and tested for split tensile strength at 28, 90, and 150 days. Models were developed to predict the tensile strengths of concrete containing RHA and SDA as binary and ternary blends with OPC at varying percentage replacements and curing ages. The split tensile strength decreased with increasing percentage replacements of OPC with RHA, SDA, and RHA-SDA. At 28 days of curing, values of 0.86N/mm 2 , 0.78N/mm 2 , and 0.70N/mm 2 were obtained at 5%, 10%, and 15% replacements of OPC with RHA respectively. Values of 0.77N/mm 2 and 0.58N/mm 2 were obtained at 5% and 10% replacements of OPC with SDA respectively. Values of 0.82N/mm 2 and 0.64N/mm 2 were obtained at 5% and 10% replacements of OPC with RHA-SDA respectively. Split tensile strengths of concrete with RHA, SDA, and RHA-SDA were lower at early age of curing but improved at later ages. For 5% replacement of OPC with RHA values of 1.42N/mm 2 and 1.85N/mm 2 were obtained at 90 and 150 days of curing respectively. For 5% replacement of OPC with SDA values of 1.28N/mm 2 and 1.65N/mm 2 were obtained at 90 and 150 days of curing respectively. For 5% replacement of OPC with RHA-SDA values of 1.35N/mm 2 and 1.66N/mm 2 were obtained at 90 and 150 days of curing respectively. Values for the control were 1.34N/mm 2 and 1.61N/mm 2 at 90 and 150 days of curing respectively. Thus, based on split tensile strength values, concrete produced with 5% to 15% replacement of OPC with RHA and 5% to 10% replacement of OPC with RHA-SDA could be used in reinforced and unreinforced concrete works where time of loading is not critical. The models developed were tested and found to be adequate for predicting split tensile strengths of binary and ternary blended OPC-RHA-SDA cement concretes.