Hydraulic Conductivity of Compacted Tropical Clay Treated with Rice Husk Ash

2011 ◽  
Vol 367 ◽  
pp. 63-71 ◽  
Author(s):  
Adrian O. Eberemu ◽  
Agapitus A. Amadi ◽  
Joseph E. Edeh
Keyword(s):  
Hydraulic Conductivity ◽  
Water Content ◽  
Rice Husk ◽  
Industrial Waste ◽  
Rice Husk Ash ◽  
Waste Product ◽  
Dry Density ◽  
Waste Containment ◽  
Hydraulic Behaviour ◽  
Waste Containment Systems

Laboratory study on compacted tropical clay treated with up to 16% rice husk ash (RHA), an agro-industrial waste; to evaluate its hydraulic properties and hence its suitability in waste containment systems was carried out. Soil-RHA mixtures were compacted using standard Proctor, West African Standard and modified Proctor efforts at-2, 0, 2 and 4% of optimum moisture content (OMC). Compacted samples were permeated and the hydraulic behaviour of the material was examined considering the effects of moulding water content, water content relative to optimum, dry density and RHA contents. Results showed decreasing hydraulic conductivity with increasing moulding water content and compactive efforts; it also varied greatly between the dry and wet side of optimum decreasing towards the wet side. Hydraulic conductivity generally decreased with increased dry density for all effort. Hydraulic conductivity increased with rice husk ash treatment at the OMC; but were within recommended values of 1 x 10-7 cm/s for up to 8% rice husk ash treatment irrespective of the compactive effort used. This shows the suitability of the material as a hydraulic barrier in waste containment systems for up to 8% rice husk ash treatment and beneficial reuse of this agro-industrial waste product.

Desiccation Induced Shrinkage of Compacted Tropical Clay Treated with Rice Husk Ash

2011 ◽  
Vol 6 ◽  
pp. 45-64 ◽  
Author(s):  
Adrian O. Eberemu
Keyword(s):  
Water Content ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Material Selection ◽  
Waste Product ◽  
Lower Amount ◽  
Wetting And Drying ◽  
Waste Containment ◽  
Compactive Effort ◽  
Waste Containment Systems

Desiccation studies are an integral part of material selection for waste containment systems. Laboratory studies on compacted tropical clay (with illite as the dominant clay mineral sourced from an excavation site) treated with up to 16% rice husk ash (RHA); an agro-industrial waste to evaluate its desiccation induced shrinkage and hence its suitability as a cover material in waste containment systems were carried out. Soil-RHA mixtures were compacted using three compactive efforts at -2, 0, 2 and 4% of optimum moisture content (OMC). Compacted samples, extruded from the compaction mould were allowed to air dry in the laboratory for a 30 day period after which they were subjected to two cycles of wetting and drying. Results show that changes in mass and volumetric shrinkage strain (VSS) were large within the first five days of drying and were affected by the compactive effort. VSS increased with higher moulding water content, water content relative to optimum and RHA treatments. VSS were affected by the compactive effort. Acceptable compaction planes were obtained for up to 12% RHA treatment. After two cycles of wetting and drying, it was observed that the rate of capillary rise within the compacted soil increased with lower compactive effort and higher rice husk ash treatment. Lower amount of cracking was observed in soil specimen with higher rice husk ash treatment and higher cracking in soils with lower rice husk ash content. Increased compactive effort reduced the effect of swelling during wetting; showing the suitability of the material as a cover in municipal waste containment facility and beneficial reuse of this agro waste product.

scholarly journals A Comparative Study of the Basic Strength and Hydraulic Properties of Lateritic Soils Stabilized with Rice Husk Ash and Bagasse Ash

2019 ◽  
pp. 1-11
Author(s):  
S. O. Ogundare ◽  
O. A. Oni
Keyword(s):  
Hydraulic Conductivity ◽  
Rice Husk ◽  
Hydraulic Properties ◽  
Rice Husk Ash ◽  
Lateritic Soil ◽  
Dry Density ◽  
Soil Matrix ◽  
Minimum Requirement ◽  
Lateritic Soils ◽  
Group A

The strength and hydraulic properties of lateritic soils stabilized with bagasse ash (BA) and rice husk ash (RHA) were examined in this study. The three lateritic soil samples used in the study were obtained from a borrow pit near the main waste dumpsite in Ado Ekiti, Nigeria. The BA and RHA were obtained locally from the burning of fibrous residue of sugar cane and rice husk respectively. Classification of the soils using AASTHO indicates Soil 1 to be Group A-6 soil, Soil 2 to be Group A-2-6 soil and Soil 3 to be Group A-2-7 soil. In general, the optimum moisture content of the stabilized soils increased with increased content of the admixtures-BA and RHA. The maximum dry density of the stabilized soils decreased with increase in the quantity of BA and RHA. Likewise, the saturated hydraulic conductivity of the stabilized soils decreased slightly with increased content of BA and RHA. The values of the minimum hydraulic conductivity of the stabilized soils were of the order of 10-4cm/s, which are higher than the minimum requirement of 10-7cm/s for soil liners in municipal solid waste landfills. The low pozzolanic characteristics of BA and RHA in the stabilized soils were attributed to the low content of CaO needed to produce CaOH2, which is normally needed to produce pozzolanic reaction products in the presence of water. The characteristics of the modified soils appeared to be influenced by the change in the soil matrix following mixing. Comparison of individual behaviour of BA and RHA in each stabilized soil showed very similar characteristics. It was concluded that another modifier such as cement that has a high content of CaO should be added to the stabilized soils for the full pozzolanic potentials of BA and RHA to be realised.

Effect of Lime and Rice Husk Ash on Horizontal Saturated Hydraulic Conductivity of Sandy Loam Soils

2019 ◽  
Vol 38 (2) ◽  
pp. 2027-2037
Author(s):  
Manoochehr Fathi-Moghaddam ◽  
Mohammad Tavakol-Sadrabadi ◽  
Mohammad Tajbakhsh
Keyword(s):  
Hydraulic Conductivity ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Sandy Loam ◽  
Saturated Hydraulic Conductivity

Experimental study on concrete with rice husk ash under sulphuric ACID solutions

2018 ◽  
Vol 7 (4.5) ◽  
pp. 522
Author(s):  
R. Ramya Swetha ◽  
Dr. G.Venkata Ramana ◽  
K. Anusha Hadassa
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Portland Cement ◽  
Sulphuric Acid ◽  
Rice Husk ◽  
Industrial Waste ◽  
Ordinary Portland Cement ◽  
Rice Husk Ash ◽  
Acid Solutions ◽  
Iron And Calcium

This investigation shows the results on aggressive sulphuric acid on the concrete combined with rice husk ash (RH) when partially replaced for ordinary Portland cement. The husk ash, which mainly contains aluminum ion, silica, iron and calcium oxides, is an industrial waste and poses disposal problems. In this study, the effect of various concentrations (1%, 3%, 5%) of sulphuric acid (H2SO4) on Concrete replaced with various percentages (0%,5%,10%,15% and 20% by weight of cement) of RH is evaluated in-terms of residual compressive strength. The loss of compressive strengths of concrete immersed in various H2SO4 solutions for 7 days 28 days and 60 days indicates that at upto 10% replacement increase in strength was observed after which strengths were decreasing. This increase in strength is attributed to pozzolanic activity of RH.  

Evaluation of Lime Treated Oil Contaminated Soils for Use in Waste Containment Applications

2013 ◽  
Vol 824 ◽  
pp. 66-72
Author(s):  
Thomas Stephen Ijimdiya
Keyword(s):  
Hydraulic Conductivity ◽  
Moisture Content ◽  
Contaminated Soils ◽  
Optimum Moisture Content ◽  
Soil Samples ◽  
Liner Material ◽  
British Standard ◽  
Waste Containment ◽  
Relative Compaction ◽  
Waste Containment Systems

This paper presents the results of an evaluation of lime treated oil contaminated soil for use in waste containment systems. Soil samples were treated with up 6 % lime contents. Specimens were prepared at optimum moisture content and compacted using British Standard Light (BSL) or Standard Proctor (relative compaction = 100%) to evaluate its effectiveness when used in waste containment applications. The hydraulic conductivity values increased with higher lime contents but were less than 1 x 10-9 m/s required for a liner material.

scholarly journals Influence of Lime, Rice Husk Ash and Coconut Fibre on Strength Properties of Subgrade

2020 ◽  
Vol 9 (8) ◽  
pp. 767-772
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Clayey Soil ◽  
Strength Properties ◽  
Strength Characteristics ◽  
Soil Stability ◽  
Dry Density ◽  
Subgrade Soil ◽  
Adjustment Strategies ◽  
Coconut Fibre

Soil stability is a significant criterion in the field of development, for soil which needs adequate steadiness, different adjustment strategies can be embraced. The entrenched methods of soil adjustment regularly utilize such establishing operators like cement. Substitution of solidifying substance with commercial or agriculture outcome is profoundly attractive. Rice husk ash is an extremely prospective agriculture dissipates as pozzolanic materials that bring about a prevalent property after joined with lime. Also, coconut fibre is well known for its durability and high resistance and gives well establishing results when combined with lime and rice husk ash. This study worked on the experimental investigation of clayey soil with admixtures like lime, rice husk ash and coconut fibre. This study included the calculation of properties of the soil as consistency limits and strength characteristics. Clay type of soil is used in this study. In view of compaction, expansion of lime, RHA and coconut fibre diminishes the dry density and expands the moisture content. From the perspective of strength characteristics and economical terms, expansion of 6% lime, 8 % RHA and 1 % coconut fibre are prescribed as ideal value for subgrade soil adjustment

scholarly journals Influence of bentonite type and producing method on hydraulic conductivity of sand–bentonite mixture

2020 ◽  
Vol 205 ◽  
pp. 10005
Author(s):  
Tomonori Sakita ◽  
Hideo Komine ◽  
Atsuo Yamada ◽  
Hailong Wang ◽  
Shigeru Goto
Keyword(s):  
Hydraulic Conductivity ◽  
Water Content ◽  
Water Mass ◽  
Water Volume ◽  
Dry Density ◽  
Initial Water Content ◽  
Specimen Preparation ◽  
Initial Water ◽  
Compaction Energy ◽  
Low Level Radioactive Waste

Sand-bentonite mixtures with bentonite content of 10-30% had been planned to handle low-level radioactive waste in Japan, because of its low permeability. Hydraulic conductivity of sand–bentonite mixture depends on the bentonite type, bentonite content, initial water content, and other factors. Given this background, falling head permeability tests were conducted on sand–bentonite mixture by varying the compaction energy for specimen preparation, initial water content (10–20%), and bentonite content (15– 30%). For these tests, the hydraulic gradient of 25-500 was set. Consequently, the hydraulic conductivities were 10-8 – 10-13 m/s for all tested conditions. Correlation between the hydraulic conductivity and the effective montmorillonite dry density (montmorillonite mass divided by the sum of montmorillonite, air, water volume), which is often used to correlate the hydraulic conductivity of bentonite, was found. Correlation was also found between the hydraulic conductivity and a new index designated as the effective montmorillonite wet density (sum of montmorillonite and water mass / sum of montmorillonite, air, water volume). Effective montmorillonite wet density reveals differences in the specimen structural distribution through consideration of the initial water content.

scholarly journals Pengaruh Penambahan Abu Sekam Padi Terhadap Peningkatan Kualitas Minyak Mandar

KOVALEN ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 83-88
Author(s):  
Musafira ◽  
Dzulkifli ◽  
Hikmah ◽  
Nizar
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Water Content ◽  
Rice Husk ◽  
Free Fatty Acid Content ◽  
Acid Content ◽  
Rice Husk Ash ◽  
Fatty Acid Content ◽  
Oil Quality ◽  
Coconut Oil

Mandar coconut oil is one of the coconut processed products, which has become superior product in West Sulawesi especially in Majene regency. Unfortunately, the Mandar coconut oil can’t be used more than a month because the water content and free fatty acid content of the oil have exceeded the maximum standard of SNI, so it can adversely affect on health. On the other hand, the existence of rice husk in Indonesia itself especially in West Sulawesi has not received attention and is limited to a few needs such as for ash or livestock feed, and the rest is thrown away. This research aims to determine the effect of rice husk ash addition on the increasing of Mandar coconut oil quality. Completely randomized design was used in this research with 6 rice husk ash concentration variation levels i.e. 0%, 5%, 10%, 15%, 20% and 25%. The result shows that the addition of rice husk ash with 10% to 25% can reduce the water content of the oil until the quality standard of SNI is full filled. The highest reduction of water content was reached with 25% of rice husk ash concentration with 81% of reduction percentage. While, the addition of rice husk ash with 15% concentration can reduce the free fatty acid content of Mandar coconut oil until 32%.

A Short Review on Fly Ash, Rice Husk Ash and Rice Husk Composites

2021 ◽  
Vol 9 (7) ◽  
pp. 841-845
Author(s):  
Aniket Mahadeo Kunbithop
Keyword(s):  
Composite Material ◽  
Fly Ash ◽  
Rice Husk ◽  
Automobile Industry ◽  
Industrial Waste ◽  
Energy Production ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Short Review

Fly ash is generated during the combustion of coal and rice husk ash is generated by the combustion of rice husk for energy production. Fly ash is industrial waste and rice husk ash is agricultural waste that is widely available worldwide. The utilization of fly ash, rice husk and rice husk ash in various applications has done a great deal to solve the waste problem. The present paper gives a short review of the utilization of fly ash, rice husk and rice husk ash as a composite material. The developed composite material is used in various applications, such as in the automobile industry and in other applications

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