1. EFFECTS OF AGGREGATE SIZES ON THE CONCRETE STRENGTH
It is well recognized that coarse aggregate plays an important role in concrete. Coarse aggregate typically occupies over one-third of the volume of concrete, and research indicates that changes in coarse aggregate can change the strength and fracture properties of concrete. To predict the behavi...
2. COMPARATIVE ANALYSIS OF THE STRENGTH OF CONCRETE MADE FROM VARIOUS AGGREGATE
EXCERPT FROM THE STUDY
Characteristics of soil-cement blocks using highly sandy laterite mixtures were examined. The compressive, flexural and direct tensile strength of soil-cement blocks are directly proportional to the concrete aggregates, while the IRA is inversely...
3. COMPARISON OF LOCALLY EXCAVATED SAND WITH RIVER SAND IN TERMS OF STRENGTH IN SANDCRETE BLOCKS
ABSTRACT
The high demand for sandcrete block for the development of physical infrastructures in Nigeria makes it relevant in building and construction industry. Therefore, as a result of the over-dependence on river sand for construction activities...
4. EVALUATION ON THE IMPACT OF AGGREGATE SIZES ON CONCRETE STRENGTH
INTRODUCTION
It is common knowledge that coarse aggregate is crucial to the success of concrete. According to studies, changes in coarse aggregate can alter the strength and fracture qualities of concrete. Coarse aggregate generally makes up over one-third of the volume...
5. UTILIZATION OF STEEL SLAG FOR STABILIZATION OF A LATERITIC SOIL
ABSTRACT
A lateritic soil classified as sandy clay or (CL) and A-7-6 (5) according to Unified Soil Classification System (USCS) and AASHTO classification system respectively, was treated with up to 10% pulverized steel slag (an industrial waste pr...
6. EFFECT OF MIX RATIO AND CURING WATER ON THE COMPRESSIVE STRENGTH OF OIL PALM SHELL (OPS) AGGREGATE CONCRETE
ABSTRACT
In this study, the compressive strengths and Modulus of elasticity of lightweight Concrete with oil palm shells as partial replacement of coarse aggregate was presented. The different types of mixing water were used, namely, cl...
7. A STUDY ON THE MODIFICATION, CHARACTERISATION AND APPLICATION OF COCONUT WASTES AS FILLERS IN RUBBER COMPOUNDING
ABSTRACT
In this study, coconut palm wastes were obtained, washed to remove sands and debris and then dried at 95oC for 1 hr to remove surface moisture. Filler modifications through carbonisation were done at varying temperatures of 300oC, 400oC, 500oC, 600oC and 700oC....
8. DESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF A MULTIPLE SANDCRETE BLOCKS MOULDING MACHINE
ABSTRACT
This work presents the design, fabrication and performance evaluation of a multiple sandcrete blocks moulding machine (MSBMM) for simultaneously moulding three of 6 inches sandcrete blocks of size 450 x 150 x 225mm. The machine was designed to operate at speed of 151.8 rad/s, a...
9. BITUMEN STABILIZATION OF LATERITE PRETREATED WITH HEAT AS A FLEXIBLE PAVEMENT MATERIAL
ABSTRACT
The search for an alternative to the conventional way of treating soil for use in road work, informed laterite soil sample classified as A-7-5(11) on AASHTO soil classification system, collected from a borrow pit at Shika, along Zaria-Funtua road in Kaduna Sta...
10. EFFECT OF CRUSHED COCONUT SHELL AND POLYETHYLENE TEREPHTHALATE AS PARTIAL REPLACEMENT OF COARSE AGGREGATE IN CONCRETE
ABSTRACT
This study investigates the suitability of crushed coconut shell (CCS) and polyethylene terephthalate (PET) as partial replacement of coarse aggregate in concrete. The PET was crushed mechanically to sizes between 0-10mm while the CCS was crushed manually to sizes between 12.7-...
11. QUALITY OF SANDCRETE HOLLOW BLOCKS IN NIGERIA
ABSTRACT
Sandcrete hollow blocks are widely used in Plateau State, Nigeria. The quality of these blocks produced, however, differs from each manufacturer due to different methods employed in the production and the properties of the constituent materials. This research work focuses on th...
12. SUITABILITY OF OSARA AND JAMATA RIVER SAND DEPOSITS FOR MOULDING OPERATION
ABSTRACT
This research was carried out to ascertain the suitability of Osara and Jamata River sand for moulding operation and Ajaokuta Foundry Sand was also tested along with the two sands under the same condition and their moulding properties were compared with that of American Foundry...
13. THE EFFECT OF PERIWINKLE SHELL ASH AND DUST ON THE COMPRESSIVE STRENGTH OF CONCRETE
ABSTRACT
The study examined the partial replacement of Ordinary Portland Cement (OPC) with Periwinkle shell Ash (PSA) and Periwinkle Shell Dust which was obtained from burning 200kg of Periwinkle shell at 6000C and grinding 200kg with ball mill respectively. Concrete cubes were prepared...
14. AN INVESTIGATION INTO QUALITY OF AGGREGATE IN ROAD CONSTRUCTION
ABSTRACT
The current extensive use of low quality aggregate in Nigerian road for engineering applications is of concern because they appear to be a level of ignorance surrounding their existing properties and implications. This project was conceived for the purpose of c...
15. APPLICATION OF SCHEFFE’S MODEL IN COMPRESSIVE STRENGTH OPTIMISATION OF CONCRETE USING RICE HUSK ASH AS PARTIAL REPLACEMENT OF CEMENT
ABSTRACT
This study investigates the economic application of scheffe’s model in compressive strength optimisation of rice husk ash-cement concrete. Physical properties of the aggregates such as specific gravity, bulk density and sieve analysis were determined. Specific gravities o...
16. ASSESSMENT OF THE IMPACT RESISTANCE BEHAVIOUR OF RHA BASED KENAF FIBROUS CONCRETE
ABSTRACT
Waste materials utilization is one of the central concerns of waste management approaches in recent years. The developments in cement and concrete technology towards the production of sustainable concrete by using waste materials and cellulosic fibre is gradually attaining acce...
17. CHARACTERIZATION OF UREASE OF BACTERIAL ISOLATES FROM CEMENT FOR CONCRETE ENHANCEMENT
ABSTRACT
Ureases are a group of enzymes that hydrolyse urea producing carbon dioxide and ammonia. Urease producing bacteria have shown their importance in microbially induced calcium carbonate precipitation in the construction industry. This study focused on the characterization of bact...
18. EFFECT OF CERAMIC WASTE ON GEOTECHNICAL PROPERTIES OF CEMENT STABILIZED CLAY SOIL
ABSTRACT A clayey soil collected at Barkindo along Lamurde-Adamawa road, Numan Local Government area of Adamawa State, Nigeria, was stabilized with 0, 2, 4 and 6% cement which was admixed with 0, 10, 20, 30 and 40% ceramic waste dust (CWD) each. Index properties test and microstructural tests wer...
19. EFFECT OF SALT WATER ON CONCRETE USING BIDA NATURAL STONES AS COARSE AGGREGATE
ABSTRACT
Concrete is a combination of cement, fine and coarse aggregates and water, which are mixed in a particular proportion to arrive at a particular strength. The cement and water react together chemically to form a paste together with the aggregate particles. The mixture sets into...
20. EFFECT OF SILICA NANOPARTICLES ON THE PERFORMANCE OF SORGHUM HUSK ASH AND CALCIUM CARBIDE WASTE BINDER BASED MORTAR
ABSTRACT
Research trends in the construction industry is toward the application of nano materials in mortar/concrete which could act as set accelerator due to the ultrafine nature of silica nano_particles (SNPs). The study is aimed at investigating the effect of SNPs on the performance...
21. EVALUATION OF GEOLOGICAL MATERIALS WITH PLASTIC ADDITIVES FOR THE PRODUCTION OF DURABLE PAVEMENT BLOCKS: CASE STUDY OF OFFA, NORTH CENTRAL NIGERIA
ABSTRACT
The management of plastic waste (whose generation is on the increase) poses a great challenge to environmentalists owning to its non-biodegradability. The research project aims at using waste plastic materials as binding groundmass in place of cement thereby producing pavement...
22. INFLUENCE OF SILICA-NANO PARTICLES ON PROPERTIES OF RICE HUSK ASH AND CALCIUM CARBIDE WASTE BINDER BASEDMORTAR
ABSTRACT
In the recent time effort has been made to replace Portland Cement (PC) wholly, thus producing an alternative binder. This innovation could be due to environmental challenges attributed to the green-house gas emission coupled with energy intensity and consumption associated wit...
23. INFLUENCE OF SORGHUM HUSK ASH AS MICRO-FILLER IN POLYMER CONCRETE
ABSTRACT
Polymer concretes (PCs) are known to be less permeable to water, but its usage is less popular in tropical countries like Nigeria because its common binder, thermoset resins, are very sensitive to rising temperature. This sensitivity to temperature accelerates the polymerizatio...
24. STABILISATION OF TROPICAL BLACK CLAY USING CALCIUM CARBIDE RESIDUE AND COCONUT SHELL ASH AS ADMIXTURE
ABSTRACT
A Tropical Black Clay (TBC), obtained by method of disturbed sampling, at a depth of between 0.5m to 1.5m, at Gwako village, Abuja, Nigeria, was treated with 0, 2, 4, 6, 8, and 10% each of Calcium Carbide Residue (CCR) and Coconut Shell Ash (CSA). Effect of the additives was in...
25. STABILIZATION OF CLAYEY SOIL USING CEMENT AND VOLCANIC ASH FOR SUSTAINABLE ROAD CONSTRUCTION
ABSTRACT
A residual clay soil was collected at Bako village along Gwagwalada-Garki road in Federal Capital Territory of Nigeria using the method of disturbed sampling. The clay was characterized and microstructural tests including X-ray Diffraction (XRD) test, Scanning Electron Microsco...
26. SUSTAINABLE USE OF CALCIUM CARBIDE RESIDUE TO ENHANCE THE STRENGTH OF CEMENT STABILIZED CLAY SOIL IN ROAD CONSTRUCTION
ABSTRACT
Clayey soil collected along Gwagwalada – Garki road was characterized and classified as A-7-6 soil according to American Association of State Highway and Transportation Officials (AASHTO) soil classification system. The clay was treated with 0, 2, 4 and 6% cement which wa...
27. EFFECT OF BINDERS ON THE PROPERTIES OF COAL BRIQUETTE BLENDS PRODUCED WITH DIFFERENT BIOMASSES
ABSTRACT
The production and characterization of briquettes from mixtures of coal, corn cob and rice husk has been carried out. The briquette samples were produced by blending varying compositions of coal and rice husk, also coal and corn cob at the ratios of 100:0, 80:20, 60:40, 40:60,...
28. INVESTIGATION OF THE CHEMICAL STABILIZATION OF SOME SOILS OF GULLY EROSION-PRONE AREAS OF ANAMBRA STATE
ABSTRACT
Soil erosion is the removal/movement of soil particles from one area to another; and one method of preventing these soil particles from eroding is by chemical stabilization (which involves altering the properties of the soil particles by adding cement, lime or any other cementi...
