Comparative Stiffness Analysis of Treated vs Untreated Meshed Coir Fiber Reinforced Cement Concrete | Chapter 7 | Science and Technology: Recent Updates and Future Prospects Vol. 9

 

This study investigates the impact of meshed coconut coir on the mechanical and durability properties of coir-reinforced cement concrete, aiming to control internal and external cracks. The meshed form of coir is known for its ability to mitigate shrinkage, enhancing both strength and durability. Phase I of the experimental investigation involved preparing 49 samples: 28 cubes (150x150x150mm) and 21 beam prisms (100x100x500mm). The tests included water absorption, porosity, sorption rate for physical properties, acid and alkaline attack resistance for durability, and compression and flexural bending strength for mechanical properties. The coir was tested in treated and untreated forms, with single and double layers in the concrete. Results indicated that while compressive and flexural bending strengths showed modest improvements, post-crack properties such as ductility, residual strength, and toughness significantly increased with higher fractions of meshed coir. Meshed coir reinforcement, used in layers, is proportioned between 5% to 25%. This natural fiber enhances material strength and durability, offering an eco-friendly alternative for construction and manufacturing applications. Its usage improves structural integrity while promoting sustainability. The findings suggest that meshed coconut coir can be a valuable addition to concrete, providing better crack control and improving post-crack behavior.

 

Author(s) Details

R. Parthasaarathi
Department of Civil Engineering, Hindusthan College of Engineering and Technology, Coimbatore, Tamil Nadu, India.

 

R. Sakthivel
Department of Civil Engineering, Sri Krishna Polytechnic College, Coimbatore, Tamil Nadu, India.

 

R. Senthil Kumar
Department of Civil Engineering, Hindusthan College of Engineering and Technology, Coimbatore, Tamil Nadu, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/strufp/v9/1350

Determining the Effect of Alccofine and GGBS Addition on the Durability of Cement Concrete | Chapter 7 | Current Approaches in Engineering Research and Technology Vol. 6

 

The durability of cement concrete is well defined as its ability to resist weathering action, chemical attack, or any other process of deterioration. Durable concrete will hold its original form quality, and serviceability when exposed to the environment. The primary component of concrete is Portland cement. Large-scale cement production facilities use a lot of energy and generate a lot of unwanted products (CO2), which harm the environment and deplete natural resources. This threat to ecology has led researchers to use industrial by-products as a supplementary cementitious material in making concrete. In view of this silica fume (SF), ground granulated blast furnace slag (GGBS), rice husk ash, fly ash (FL), metakolin, alccofine (AL), micro-fine material, etc.; are tried out for replacing cement partially or fully in concrete, without compromising on its strength, also reduce greenhouse gases and sustainable way of management of waste. Alccofine is a specially processed product based on slag of glass content with high reactivity obtained through the process of granulation. A new ultra-fine material that emerged in the market is called Alccofine. This is available as a cementitious material for replacing cement. Since this is a new material, a study is tried out with the combination of Alccofine and GGBS. Ordinary Portland Cement 53 grade was used throughout the study and the grade of concrete is M20. Totally 108 cubes and 27 cylinders were cast and tested in the laboratory with nine different percentage combinations of Alccofine (A), GGBS (G) and cement (C) (C100, C70A0G30, C90A10G0, C60A10G30, C30A10G30, C40A0G60, C85A15G0, C55A15G30, C25A15G60). The average loss of weight and loss of compressive strength is considerably low. As the attack proceeds, all the cement compounds are evenly broken and leached away, together with carbonate aggregate material. In each case, 3 nos. of specimens were used for repeatability. It is intended to study the compressive strength, and its durability properties like acid attack test, sulphate attack test and rapid chloride permeability test (RCPT). Among the nine different combinations, the maximum compressive strength of concrete is achieved by using AL10% and GGBS 30% is 38.08 N/mm2. C60A10G30 is 28.76% higher than the control mix. The result shows that concrete incorporating alccofine and GGBS have higher compressive strength and alccofine enhanced the durability of concrete also. It is recommended to utilize the AL material with cement after checking its other durability properties and flexural studies on beams.

 

Author(s) Details

Balamuralikrishnan R
Department of Civil and Environmental Engineering, College of Engineering, National University of Science and Technology, Muscat, P.O Box: 2322, CPO Seeb 111, Sultanate of Oman.

 

Saravanan J
Department of Civil and Structural Engineering, Annamalai University, Pin: 608001, Tamil Nadu, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/caert/v6/1218

Study of Compressive Strength of Brick Prisms with Three Different Types of Bricks | Chapter 6 | Theory and Applications of Engineering Research Vol. 7

 The objective of this research is to study the compressive strength of brick prisms with three different types of bricks. The experiments involved to quantify the strength of brick prisms with two different mixes. Experimental investigations have been conducted on brick prism specimens to study its performance with the presence of reinforcement. Brick prisms were constructed using red bricks, fly ash bricks and concrete bricks with and without embedding steel reinforcement. Cement mortar with 1:5 and 1: 6 mixes have been used to build prisms. Concrete bricks of same sizes were casted in the lab and used after proper curing. Brick prisms were subjected to compressive force by Universal Testing Machine. Compressive strength of different types of brick prisms were compared and plotted. Compressive strengths were improved by embedding steel reinforcement in the brick works. Reinforced Concrete brick prisms contributed higher strength. Reinforced concrete bricks and fly ash bricks can be used in brick works were buildings situated in earthquake prone area. Two layers or three layers of steel reinforcement can be provided in brick works. Reinforced fly ash brick prism contributed higher compressive strength than the red brick. By embedding reinforcements in the brick works, load carrying capacity and stability of brick works have been improved. Due to ductile properties of steel reinforcement, steel embedding brick works led to ductile and reduce brittle cracks. Overall performance of brick works improved by embedding steel reinforcement.

Author(s) Details:

Suyamburaja Arulselvan,
Department of Civil Engineering, Coimbatore Institute of Technology, Coimbatore, Tamil Nadu, India.

G. Puvaneswari,
Department of ECE, Coimbatore Institute of Technology, Coimbatore, Tamil Nadu, India.

Please see the link here: https://stm.bookpi.org/TAER-V7/article/view/13685

Study of Potential Use of Iron Mining Tailings Calcined in a Flash Furnace as Pozzolanic Material | Chapter 11 | Current Innovations in Chemical and Materials Sciences Vol. 2

 The main objective concerning this chapter search out show that fine mining tailings produce from iron mining have characteristics similar to workable earth material, and clays rich in kaolinite, which are natural resources that when submitted to flash calcination result in incite- ucts with pozzolanic traits of excellent value, and can be used to subs- titute Portland cement, gooey material that hardens for iron ore tailings, cold propel something through the air of dam tail- ings, and as flexible pavements for the base and subbase of roads. The research complicated characterizing the pebbles both before and after calcination, and operating analysis on their synthetic, mineralogical, thermogra- vimetric, and mechanical substance. Similarities between the results and those for commonly used pozzolans and metakaolin were found. The study of the study of plants of the particles before and afterwards calcination was conducted through studies of images acquired by scan- ning photoelectric microscope. The pozzolanic activity of the fine excavating tailings calcined accompanying flash technology was judged in uniaxial compression trials, that show the excellent results.

Author(s) Details:

Evandro Moraes da Gama,
Department of Transport Engineering and Geotechnics, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.

Paulo Roberto Gomes Brandão,
School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.

Talita Caroline Miranda,
Department of Transport Engineering and Geotechnics, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.

Tamiris Seerig,
Vale, Belo Horizonte, Brazil.

Scott Ferson,
Institute for Risk and Uncertainty, University of Liverpool, Liverpool, UK.

Please see the link here: https://stm.bookpi.org/CICMS-V2/article/view/12394

Feasibility of Reverse Osmosis (RO) Plant Wastewater for Reuse in Cement Mortar | Chapter 3 | Research and Developments in Engineering Research Vol. 7

This unit carried out practicability of R O plant wastewater for reuse in cement often with sticky material. Municipalities and major capitals in the Andha Pradesh, India, selling R O plants discussed water to people in dwellings, commercial, institutes. Most of people as political whole from these areas irrespective of public status are absorbing for drinking purpose.  Almost, all these plants are gleaning ground water for treatment and Input water situation efficiency of R O situation plant is 30 to 35 percent, and 65 to 70 allotment water is let out as wastewater.  A total of fourteen water situation plants were selected carelessly in the Narasaraopet municipality domain, Guntur district, Andhra Pradesh, India. During water situation, plants were discharging approximately 1,00,000 L/era as wastewater. Based on the concentrations of constituent’s in wastewater, four typical plants that is, Narasaraopeta Engineering College (NECWW), Patan Khasim Charitable Trust (PKTWW), MahmadhKhasim Charitable Trust (MKTWW) and Amara (ARWW) were taken in this study.Portland pozzolana cement (PPC)'s depiction with regard to its tangible and mechanical possessions, such as background times, compressive substance, and flexural strength, was proven in laboratories and distinguished to control specimens steal distilled water (DW) as the joining water. No significant change was noticed in initial and beat setting occasion but setting process of picked wastewaters were retarded as distinguished to that of reference water. Almost, no change was noticed in 90 days compressive and flexural strengths in four plants wastewaters examples compared to that of remark water specimens. XRD method was employed to settle main hydrate compounds formed in hydration process of cement samples cast with wastewaters. The change in 3, 7, 28, and 90 days compressive substances of test specimens steal NECWW, PKTWW, MKTWW and ARWW almost same that of reference samples made with DW. Due to occupancy of bicarbonate in wastewater, it is reacted with calcium hydroxide, fruit of rection is calcium carbonate but it does not affect on strength incident of cement mortar.

Author(s) Details:

G. Reddy Babu,
Department of Civil Engineering, Seshadri Rao Gudlavalleru Engineering College, Gudlavalleru-521356, Andhra Pradesh, India.

G. Madhava Kumar,
Chief Manager-EHS, Siemens Large Drives India Pvt. Ltd., Hyderabad, India.

 Please see the link here: https://stm.bookpi.org/RADER-V7/article/view/11703

Strength and Surface Quality Properties of SCC Made Using Controlled Permeable Formwork Liner | Chapter 8 | Techniques and Innovation in Engineering Research Vol. 3

 Corrosion in reinforced concrete structures is a major problem worldwide, resulting in significant repair and retrofit costs. All aggressive agents penetrate from the surface of the concrete into the concrete and initiate corrosion of the rebar. Controlled Permeability Formwork (CPF) is a positive method to improve the quality of concrete surface zones. This technique is used to expel excess water and trapped air from near the surface of fresh concrete while retaining cement and other fine particles. This ensures a reduced water-cement ratio (w-z), increased cement content and reduced surface porosity in the concrete cover zone. CPF action creates a smooth surface without pins and punches. This paper reports an experimental study conducted to investigate the effects of his CPF liners on the mechanical properties and surface quality of self-compacting concrete (SCC). Samples were prepared against CPF liner and impermeable steel formwork (IMF) and tested at 7, 14, 28, and 60 days. Tests performed include compression, split tensile and flexural strength, rebound number, ultrasonic pulse velocity, and abrasion resistance. The results show that the CPF concrete samples showed significant improvement in tensile strength and rebound number compared to his IMF concrete samples. Top 20mm concrete quality improved to SCC by using CPF liner.

Author(s) Details:

S. Kandasamy,
Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, India.

S. Syed Ibrahim,
Department of Civil Engineering, Ilahia College of Engineering and Technology, Ernakulam, Kerala, India.

P. Gowdhamramkarthik,
Department of Civil Engineering, Government College of Engineering, Dharmapuri, Tamil Nadu, India.

N. Pannirselvam,
Department of Civil Engineering, SRM Institute of Science and Technology, Chennai, India.

M. Rajaram,
Department of Civil Engineering, SRM Institute of Science and Technology, Ramapuram Campus, Chennai, India.

Please see the link here: https://stm.bookpi.org/TAIER-V3/article/view/8430

Study of the Resistance to Influence of Aggressive Liquids on Concrete with Lightweight Aggregate | Chapter 3 | Recent Trends in Chemical and Material Sciences Vol. 9

One of the key issues that might lessen a building's longevity is the corrosive exterior environment's effect on the concrete construction. The article examines the effects of component type on a few characteristics of lightweight concrete (LWC) that have been subjected to hostile liquids. When using lightweight concrete with porous aggregates, consideration should be given to the impact of a hostile environment. The publication contains the findings of testing on four light concretes that were subjected to hostile liquids and had varying water-cement ratios and compositions. Granulated expanded glass aggregate (GEGA) and granulated sintered ash aggregate (GAA) were used to create the concrete mixes, along with the mineral ingredient silica fly ash. LWC specimens underwent a year of in-lab curing before being exposed to hostile liquids for 60 days. Strong acid—HCl, at 1% and 2% concentrations; weak acid—CH3COOH, at 1% and 2% concentrations; and an aqueous salt solution of Na2SO4, at 1% and 2% concentrations—were the different conditions. After that, the structure was studied, and the impact of aggressive liquids on the LWC's compressive strength was looked at. Additionally, the weight of samples of lightweight concrete after corrosion was calculated. The test technique may be used to estimate the impact of aggressive liquids on the LWC more quickly, according to the findings of the test. LWC has strong resistance to hostile liquids when combined with GEGA and GAA aggregates. The research findings also show that HCl solution was the most aggressive, whilst Na2SO4 was the least aggressive. The rate of corrosion advancement increased with the destructive factor concentration. Concretes with aggregates consisting of sintered fly ash and foamed glass can be used in both conventional construction and in buildings with harsh environments.

Author(s) Details:

Marzena Kurpinska,

Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland.

Elzbieta Haustein,

Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland.

Filip Kurpinski,

Faculty of Electrical and Control Engineering, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland.

Please see the link here: https://stm.bookpi.org/RTCAMS-V9/article/view/7376

Impact of Gypsum Addition on Portland Composite Cement (PCC) | Chapter 7 | Research Aspects in Chemical and Materials Sciences Vol. 1

 In Portland Composite Cement, gypsum can be used instead of clinker. It influences the compressive strength of cement by modulating the hydration reaction speed in order to get the best compressive strength possible. Furthermore, it delays both the early and ultimate hardening of the cement. Other materials, such as trass, are also employed in this study that were not before examined. It is a volcanic ash-derived soft rock or soil layer. Pozzolana is a kind of limestone that may be added in cement formulations to boost compressive strength. The goal of this study is to see how gypsum affects the quality of Portland Composite Cement, such as compressive strength, setting time, and SO3 concentration. They looked at clinker properties by mixing in some gypsum that had already been used in previous research. The impact of the SO3 concentration generated by the addition of gypsum, on the other hand, requires further investigation. The samples were made with varying amounts of gypsum, ranging from 0 to 5%. As for the remaining components, the clinker ratio was set at 75%, while limestone and trass were added at a constant ratio of 1.2. The fineness factor is kept in the range of 3850 50 cm2/gr as a controlled variable. At the ages of 1, 3, 7, and 28 days, the effect of adding gypsum to clinker was determined using a mortar compressive strength test and the binding time. The results reveal that adding 3.5 percent gypsum to a 28-day cure binder increased the attributes of PCC: compressive strength of 348 kg/cm2, SO3 concentration of 1.7 percent, initial setting time of ≥ 90 minutes, and final setting time of 375 minutes.

Author(s) Details:

Herliati Rahman,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

Anggi Sagitha,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

A. Dyah Puspita,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

R. Puput Dwi,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

Akhirudin Salasa,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

Please see the link here: https://stm.bookpi.org/RACMS-V1/article/view/7092

Assessment of Eco Friendly Bricks Manufactured using Waste Papers | Chapter 03 | Technological Innovation in Engineering Research Vol. 1

 The usage of landfills to store paper waste is causing severe environmental problems all over the world. Because the building business uses so many resources, there is a huge need for construction materials. However, more waste paper is disposed of at landfills or dump sites than is recycled. Waste paper was used in the construction of concrete bricks, which is a new innovative composite material, in an experimental investigation. Experiments on compressive strength, weight, and water absorption properties were undertaken with sun dried and water cured materials at various curing periods. Paper in concrete gives high strength and durability, as well as a considerable weight reduction and low heat conductivity, according to test data.

Author(S) Details

S. P. Sangeetha
Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Vinayaka Missions Research Foundation, Chennai, India.

R. Divahar
Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Vinayaka Missions Research Foundation, Chennai, India.

P. S. Aravind Raj
Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Vinayaka Missions Research Foundation, Chennai, India.

View Book:- https://stm.bookpi.org/TIER-V1/article/view/6801

Assessment of Sandcrete Blocks Quality in Imo State, Nigeria: A Brief Overview | Chapter 09 | Novel Perspectives of Engineering Research Vol. 5

 The purpose of this study was to evaluate the production management practises used in the fabrication of high-quality sandcrete blocks in a few tested locations in Owerri, Imo State, Nigeria.

The compressive strength and water absorption rate parameters of the selected samples sandcrete blocks were determined using field sampling, experiments, and work study methods.

The study used the Central laboratory at the Main campus, Federal University of Technology, Owerri, Imo State, Nigeria, to test and conduct the pilot experiments between the months of May and September 2021, and chose and sampled blocks manufactured in areas of Owerri Municipal in Imo State.

Methodology: For the field survey, manufactured sandcrete block specimens were collected from randomly selected block producing plants and tested in the laboratory. The qualities of the blocks sampled were examined using the compressive strength and water absorption tests, respectively. As a control sample, blocks made in a pilot laboratory were employed. Only hollow sandcrete blocks measuring 450mm x 225mm x 225mm were acquired and used to evaluate the block samples. In other words, for each of the two evaluation parameters assessed, a total of 35 pieces of hollow sandcrete blocks were obtained and deployed. In Owerri municipal, Imo State, where the study was conducted, a total of six (6) blocks manufacturing factories with moulding machines were identified. A random sampling approach was used to choose four (67 percent) of the block manufacturers, and five (5) pieces of blocks were sampled from each of the selected manufacturers' stocks. In addition, the study randomly chose five (5) pieces of blocks for analysis from the specimens produced by the 'Pilot Laboratory.' In total, twenty-five pieces of block specimens were gathered, with twenty (20) coming from field factories and five (5) coming from pilot laboratory specimens for analysis.

The findings of the investigation revealed, among other things, that the mean compressive strength values found were as low as 1.92N/mm2, and that all of the commercial blocks analysed had a water absorption rate of roughly 17 percent.

Conclusion: The acquired results did not compare favourably to the acceptable minimum standard levels set by the NIS. Poor manufacturing quality control practises, as well as the lack of impact of regulatory authorities in Imo State, were identified as factors that contributed to the undesirable outcomes.

Author(S) Details

Nwabueze Michael Anosike
Department of Building, School of Environmental Sciences, Federal University of Technology Owerri, Imo State, Nigeria.

View Book:- https://stm.bookpi.org/NPER-V5/article/view/5325

Effect of Cow Dung on Compressive Strength, Density, Abrasion Resistance and Permeability Properties of Earth Brick | Chapter 15 | New Visions in Science and Technology Vol. 7

 The effect of cow dung on the mechanical and durability aspects of earth brick is discussed in this study. Cow faeces chemically stabilised a local earth. When 20% cow dung (by weight of soil) was utilised to stabilise the earth material, it resulted in higher dry and compressive strengths. The dry and wet compressive strengths of bricks stabilised with 20% cow dung content were 6.64 and 2.27 MPa, respectively. The dry compressive strength of bricks stabilised with 20% cow dung increased by around 25% over ordinary earth bricks without stabiliser. Water migration into the brick was reduced due to the 20% cow dung content (i e. lower permeability). Additionally, the abrasion resistance rose by up to 20% when the cow dung content was increased. The conclusion that suitable building design would be necessary to avoid the cow dung stabilised earth bricks from coming into direct contact with rainfall was substantiated by a significant increase in dry compressive strength over wet compressive strength. This study concluded that proper construction specifications are required to avoid extended direct contact with rainfall by cow dung stabilised earth bricks.

Author(S) Details

Peter Paa-Kofi Yalley
Department of Construction and wood Technology Education, Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development (AAMUSTED), Ghana.

Dorothy Manu
Department of Construction and wood Technology Education, Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development (AAMUSTED), Ghana.

View Book:- https://stm.bookpi.org/NVST-V7/article/view/4432

Mechanical Properties of Compressed Stabilised Earth Blocks with Rice Husk Ash| New Visions in Science and Technology Vol. 5

The purpose of this study was to see if Rice Husk Ash (RHA) could be used as a partial replacement for cement in clay soil incompressed earth blocks. The percentage of rice husk ash ranged from 0 to 2.5 percent, 5 percent, 7.5 percent, 10 percent, and 12.5 percent. The blocks admixed with 10% rice husk ash had the highest compressive strength of 1.90 MPa. Water absorption increased continuously as the proportion of rice husk ash increased, with a value of 8.55 percent for the block with 12.5 percent RHA. As the percentage of rice husk ash in the blocks increased, the unit weight of the blocks fell.

Author (S) Details

P. Asha

Department of Civil Engineering, Jerusalem College of Engineering, Pallikaranai, Chennai – 600100, India.

View Book :- https://stm.bookpi.org/NVST-V5/article/view/4121

Investigation on Micro-structural Analysis of Fly Ash and Clay Compacts | Chapter 8 | New Approaches in Engineering Research Vol. 11

 For its light weight, industrial waste such as fly-ash is commonly employed as a building material. The fundamental disadvantage of these bricks, however, is that they have a low compressive strength. As a result, there is a lot of research being done to improve the strength of these bricks. In order to keep costs down, ordinary clay is utilised to make bricks. As a result, research is being conducted to develop a new systematic technique for producing a new form of brick with higher compressive strength than standard clay bricks. Fly-ash is combined with clay in various compositions, sintered at various temperatures, and microstructural analysis is performed to identify a method to improve its properties.

Author (S) Details

Ashutosh Pattanaik
FET, JAIN (Deemed to-be) University, Bengaluru, 562112, India.


Subash Chandra Mishra
Department of Mechanical Engineering, FET, JAIN (Deemed to-be) University, Bengaluru-560083, India.


Adarsha H.
FET, JAIN (Deemed to-be) University, Bengaluru, 562112, India.


View Book :- https://stm.bookpi.org/NAER-V11/article/view/3568

Study of the Compressive Strength Characteristics of Cement Mortar Reinforced with Kenaf Fibre | Chapter 14 | Recent Trends in Chemical and Material Sciences Vol. 2

 Kenaf fibre is one of the various products derived from the kenaf plant, which is found in abundance in many places of the globe. The use of kenaf fibre to strengthen cement mortars as a building material yielded positive results in research. Cement mortar mixtures were proportioned to include 1-3 percent fibre volume and 10-30mm fibre length. The composite's performance is measured in terms of density, water absorption, and compressive strength. According to the findings, water absorption increased with fibre volume but remained within ASTM C 211-77 limitations. The density of the kenaf fibre cement mortar did not change significantly. There is no statistical difference between the means of the compressive strength of plain mortar and those containing 1-3 percent fibre volume at 10mm fibre length, according to an analysis of variance (ANOVA) at a 5% level of significance. The compressive strength data revealed a substantial link between fibre volume, fibre length, and curing age when regression models were built.

Author (S) Details

T. M. Omoniyi
Civil Engineering Department, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria.

Duna Samson
DG/CEO, Nigerian Building and Road Research Institute, Abuja, Nigeria.

Othman Musa Waila
Civil Engineering Department, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria.

View Book :- https://stm.bookpi.org/RTCAMS-V2/article/view/2915

Investigating the Effects of Variability in Pozzolanic Properties of Rice Husk Ash on Compressive Strength of Concrete | Chapter 4 | Recent Advances in Science and Technology Research Vol. 7

 Rice husk ash (RHA) is an agro waste and a natural pozzolana that is silica-rich and globally found in abundance. This thesis examined the RHA pozzolanic properties from seven different sources in Nigeria (Ogoja, Abakaliki, Adani, Adikpo, Obubra, Makurdi and Vandikya). The elementary chemical composition of this natural pozzolan is found to differ depending on its location. Samples from Ogoja, followed by Abakaliki, Adani, Adikpo, Obubra, Makurdi and Vandikya, were identified to have the highest pozzolanic properties. Their silica content was found to be 84.55%, 76.3%, 70.12%, 70.11%, 64.67 percent, 55.55 percent, and 48.4 percent respectively. As partial substitutes for ordinary Portland cement, four of the seven samples with the highest pozzolanic values were used at 5, 10, 15, 20, 25 and 30 percent replacement levels. The concrete mix ratio of 1:1.5:3 was adopted and the compressive strength values were found to be in the range of 37-42N/mm2 at 5% RHA, 35-39.5N/mm2 at 10% RHA, 30-34.5N/mm2 at 28 days at 5% RHA, 35-39.5N/mm2 at 10% RHA, 30-34.5N/mm2 Compared to the monitored sample, with a strength value of 15 percent RHA, 27-29N/mm2 at 20 percent RHA, 22-25.6N/mm2 at 25 percent RHA and 21-24N/mm2 at 30 percent RHA   42.64N/mm2. Approx.

Author (s) Details

Dr. G. A. Akeke
Department of Civil Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria.

D. E. Ewa
Department of Civil Engineering, Cross River University of Technology, Calabar, Cross River State, Nigeria.

F. O. Okafor
Department of Civil Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria.


View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/330