This paper assesses the effect of direct and indirect factors on the shear performance of ultra-high performance fibre reinforced concrete beam containing coarse aggregate (UHPFRC-CA) using four point loading arrangement. The obtained results were used to categorize UHPFRC-CA beam's failure mode, establish the influence of key factors on shear performance, and develop UHPFRC-CA beam's compression zone resistance and first shear cracking load equations whose results were compared with those fr...
Abstract Geopolymer concrete (GPC) is a novel and environmentally friendly type of concrete that eliminates the use of cement, resulting in a significant reduction in carbon emissions and a more sustainable construction material. Alkaline activators are used in GPC to achieve rapid strength development. The most popular alkaline activators are sodium/potassium silicate and sodium/potassium hydroxide, which are known contributors to carbon emissions, hence limiting the advantages of GPC; ther...
Abstract Geopolymer concrete has been the ideal replacement for Ordinary Portland cement concrete in producing green concrete. The binder in geopolymer concrete is a cementitious paste made from amorphous Aluminosilicate and activated by an Alkaline solution. The geopolymerization process is initiated at elevated temperatures. Thus, the curing requires elevated temperatures. This curing method limits the application of geopolymer concrete in the construction industry. In a geopolymer mix, th...
This research work, which presents a simplified technique of modelling steel fibers, uses python algorithm that can be directly run in ABAQUS to automatically generate the location and orientation of steel fibers in a rectangular ultra-high performance concrete specimen, so that the effect of steel fibers on the properties of such a specimen can be directly investigated through numerical simulation. This method is fast, can be applied to structural members of bigger dimensions (like beams,...
To study the effects of different types of bacteria on concrete. Develop a bacteria1 concrete by introducing the different bacteria. To study the efficiency of bacteria when mixed with mineral admixtures. Good compressive strength by arriving at optimum proportions by tria1. To make a comparative study of bacteria1 concrete with norma1 concrete.
This work considers the shear behavior of reinforced concrete beams using granite as coarseaggregate without shear links. Four reinforced concrete beams were cast and tested to understandthe shear behavior with varying tension reinforcement ratios. The beams were cast in two pairs;the first pair had a depth of 184mm, a width of 110mm, and a length of 1500mm. The second pairhad a depth of 150mm, a width of 90mm, and a length of 1000mm. The first and second pair ofbeams had span-to-depth ratios...
General Introduction Concrete is a composite material consisting of aggregates enclosed in a matrix of cement paste including possible pozzolans, has two major components, cement paste and aggregates. The strength of concrete depends upon the strength of these components, their deformation properties, and the adhesion between the paste and aggregate surface [ 1 ]. In recent years, the construction industry has shown significant interest in the use of high strength concrete (HSC), in applica...
ABSTRACT The research was conducted to study the possibility of utilizing the waste bricks abundantly available in most parts of Gwer-West Local Government Area of Benue State, particularly Naka, the Local Government capital, as coarse aggregates in structural concrete. Trial mixes were prepared using the crushed burnt bricks known also as brick bats as coarse aggregates only, mixture of crushed bricks and river washed gravel as well as using river washed gravel from River Benue only at varyi...
ABSTRACT As the prices of building materials in the country continue to increase sharply, there is growing need to source local materials as alternative for farm building constructions. This project investigates the performance of a cylindrical shell built of laterized concrete for storage of foodgrains or water. L In order to optimize the mix ratio of the constituent materials that will produce maximum strength, a mathematical model which relates the strength of laterized concrete and its co...
TABLE OF CONTENTSDECLARATION..........................................................................................................................iiAPPROVAL............................................................................................................................... iiiDedication................................................................................................................................ivACKNOWLEDGEMENTS.....................................................
TABLE OF CONTENTSDECLARATION................................................................................................ ivAPPROVAL..................................................................................................... iiACKNOWLEDGEMENT ....................................................................................iiiABSTRACT ................................................................................................... ivTABLE OF CONTENTS .............................
ABSTRACT This study investigated the structural characteristics of chikoko mud-cement concrete. The structural characteristics of chikoko mud-cement concrete investigated were compressive strength, flexural strength, shear strength and split tensile strength while the elastic properties investigated were static modulus of elasticity, poisson’s ratio and shear modulus. The water absorption of chikoko mud-cement concrete as a reflection of concrete durability was also investigated. Ninety (9...
ABSTRACT Sugarcane Bagasse is the fibrous residue leftover when sugarcane is squeezed for its juice. Bagasse ash is obtained by subjecting Bagasse to calcinations using furnace. This work is aimed tat using Bagasse Ash as a replacement in the production of concrete. The bagasse was collected from dumped in a market in Kano and thereafter sun-drie to eliminate any trace of moisture. It was then taken to the blast furnace for calcinations(controlled burning) at a temperature of 1250OC for 25mi...
TABLE OF CONTENTS CERTIFICATION i DEDICATION ii ACKNOWLEDGEMENT �...
ABSTRACT In the face of a possible scarcity of natural aggregates in the future in line with sustainable construction, this research investigates the feasibility of the use of recycled coarse aggregates as an alternative to natural coarse aggregates in structural concrete. The recycled coarse aggregate used in the research was processed from waste concrete. The percentage of recycled coarse aggregates by weight of all in aggregates in the test mixes were 0%, 5% 10% 20% and 30 % respectivel...