Research Papers/Topics in Civil Engineering
Rock Cracks and its Effects on Concrete Structures
In this paper, rocks with existing cracks and the effects on concrete structures it supports is discussed. Based on this paper, rock cracks may occur naturally when the rock gets closer to the earth surface due to erosion, through weathering processes (particularly frost wedging in mountainous areas and the diurnal heating and cooling of a rock outer layer in hot arid environments) and through tree roots. Artificially, cracks in rock may be caused by shock waves during rock blasting. The effe...
The Engineering Study on the Use of Crushed Stone Aggregate and Crusher Dust Mixes in Flexible Pavements of Karachi-Hyderabad Motorway, Sindh, Pakistan
The development of the country is directly related with the better road communication from mega cities to rural villages. Pakistan is a developing country and has started a grand network of highways, superhighways and motorways in all four provinces along with Kashmir and Northern and northwestern regions bordering china and Afghanistan. Highway Flexible pavements are the most commonly used form of pavements and have four component layers namely Sub-grade, Sub-base and base and surface co...
Engineering Properties of Nagar Parkar Plutonic & Volcanic Rocks as a Construction Aggregates, District Tharparkar, Sindh Province, Pakistan
AbstractThe purpose of this paper is to study the important engineering properties of the volcanic rockspresent with the Nagar Parkar Granites located from Sindh University Campus Jamshoro 5 h 44min (355.3 km) via Hyderabad-Badin Road and 5 h 57 min (323.5 km) via Naukot-Mithi Roadand Islamkot, the rocks look suitable for pavement and concrete aggregates. Numbers of standardtests were conducted. Which included; Specific Gravity, Gradation, Soundness, Particle shapeand Surface Texture Absorpti...
Correlation and Regression as applied in Green Concrete Research
Correlation and regression were used as statistical tools to analyse the mechanical and durability properties of green concrete. The use of these analytical tools showed that the degree of relationship that exists between a green concrete property (for example compressive strength or water absorption or resistance to sulphate attack) and percentage replacement of cement with a civil engineering material can be established using correlation; the nature and extent of the relations...
Behaviour of Coconut Shell Aggregate (CSA) Concrete at Elevated Temperature
This paper attempts to study the mechanicalbehaviour of coconut shell aggregate (CSA) concretesubjected to elevated temperatures when coconut shell (CS)is used to replace coarse aggregate at 0, 10, 20 and 40% inconcrete. The coconut shell used was obtained by breakingthe shells into smaller sizes of less than 20mm after thefibres were removed. In order to produce control concretesamples with a minimum compressive strength of 15N/mm2at 28 days curing age, mix ratio of 1:2:4 and water-cementrat...
Mechanical Properties of Particleboard Made from Mahogany Leaves Using Gum Arabic as Binder
This paper presents the findings of an investigation into the use of mahogany leaves particles for the production of gumArabic bonded particleboards. Fresh mahogany leaves, air-dried to a target moisture content of 10% were crushed to anaverage particle size of 2mm. Mix ratios of 2:1, 2.5:1, 3:1, and 3.5:1 of gum Arabic to the crushed mahogany leaves byweight of the mahogany leaves were produced respectively. Twenty four (24) particleboards of sizes 200mm length,50mm width, and 6mm thick were...
Performance of Concrete Made with Coconut Shell Ash (CSA) as an Admixture in Acidic Environment
This paper presents the findings of an investigation on the use of coconut shell ash (CSA) as admixture in concrete and its effect on durability performance. The CSA used was obtained by controlled burning of coconut shell in an incinerator to a temperature of 600–650ºC for 3 hours, air cooled, sieved through 75μm sieve and characterized by using X-ray Fluorescence (XRF) analytical method. The compressive and splitting tensile strengths of concrete were investigated at varying CSA additio...
Effect of Coconut Shell Ash (CSA) as an Amixture on the Properties of Cement Paste and Concrete
This paper presents the findings of an investigation on coconut shell ash (CSA) as admixture in cement paste and concrete. The CSA used was obtained by controlled burning of coconut shell in an incinerator to a temperature of between 600–650ºC for 3 hours, air cooled, sieved through 75μm sieve and characterized based on its oxides composition determined using X-ray Fluorescence (XRF) analytical method. The effects of CSA on cement paste were investigated with addition of 0, 2, 4, 6, 8 and...
Use of Correlation and Regression Analyses as Statistical Tools in Green Concrete Research
Correlation and regression in this paper were employed as analytical tools to study the degree of relationship as well asthe nature and strength of the relationship between green concrete properties and percentage replacement of cementwith civil engineering materials. Pearson product-moment method and Spearman’s correlation coefficient wereextensively used to show how correlation analysis can be practically applied in green concrete research. Least squareregression line method for both line...
Analysis Of The Effect Of Polypropylene Polymer (Crushed Plastic Waste) On Oven Dried Laterite Bricks
ABSTRACT The sandcrete blocks have been a major material for the construction of structures in Nigeria. This material have provided a means of constructing walls and partition. However, the sandcrete blocks also have the disadvantage of cost and unavailability of materials such as granite, cement and other combining aggregates.Laterite, a readily available material can be efficiently used to produce Laterite bricks which can be fired to improve it's mechanical and physical property. Th...
STUDY OF HYDRAULIC JUMP IN A RECTANGULAR FLUME BY COMPARING RECTANGULAR BLOCK WIER AND SLUICE GATE
This experiment was conducted in order to have a broader knowledge on hydraulic jump and its applications. It was performed in the hydraulic laboratory of the department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, using the TQH23, 2.52m flow rectangular channel and the HID hydraulic bench which provides water to the channel with the aid of the pump incorporated in the HID.Five different discharges were obtained by varying the flow. Hyd...
Inventory of University of Ibadan Road Facilities
Road inventory is the compilation of information about the state and condition of the road system. This study was carried out to collect road data and analyze selected road facilities within the University of Ibadan to serve as an inventory for future purpose. This was done to help resolve the issue of insufficient information about the road facilities within the University premises. In this project a survey of the roads was done which involved the use of photo/video log system and th...
Effects of sawdust Ash on some physical properties of concrete
CHAPTER ONE1.0 INTRODUCTION1.1 Background of StudyThere is need for affordable building materials in providing adequate housing for teamingpopulace of the world. The cost of conventional building materials continue to increase asmajority of the population continues to fall below the poverty l...
Experimental Study on the Engineering Properties of Marble Waste Powder from Hyderabad Marble Market Sindh Pakistan for Making Concrete Including Recycled Coarse Aggregates
Study of Coarse Aggregate Characteristics on Strength Properties of High Performance Concrete Using Chemical AdmixturesMushtaque Ahmed Pathan1, Rafique Ahmed2, Maryam Maira31Assistant Professor, 2Associate Professor, Center for Pure & Applied Geology, UoS Jamshoro, Sindh, Pakistan3Freelancer Researcher Mehran university of Engg. & Technology Jamshoro, Sindh, Pakistan*Corresponding author: Mushtaque Ahmed Pathan | Received: 14.03.2019 | Accepted: 21.03.2019 | Published: 31.03.2019DOI:10.21276/...
Investigation on the mechanical properties of sagbama aggregate (flexural property)
ABSTRACTThis study investigation on the mechanical properties of Sagbama rice granite was analyzed to determine the load that would cause ultimate flexural stress on the material when used in concrete construction .This is necessary to make decision on where it is suitable for use. This study requires the production of 12 concrete beams of 100mmx100mmx500mm with sagbama rice granite as coarse and fine aggregate. Three (3) specimens were produced to be tested at 7, 14, 21 and 28days.Mix ratio ...
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