Abstract This study investigates the effect of Date Palm Seed Ash (DPSA) as a pozzolan on the workability, compressive strength and water absorption capacity of concrete. Temperature regulated kiln was used to burn the Date Palm Seed (DPS) into DPSA in two stages: it was first burned for eight hours at an optimum temperature of 590oC and then cooled for two days. It was again burned for three hours at an optimum temperature of 630oC for eight hours and was air cooled again for three days. The...
Nowadays, consumption of rice is increasing that leads to the greater demand in the production of it. After harvesting and shelling, husk remains and comes in great volume. Thus this rice husk is one of the big problems to be considered. Some studies suggested a solution to put rice husk ash as partial substitute to cement in concrete mixing in order to minimize the large quantity of rice husks build up as time goes by. Reinforced concrete is concrete in which reinforcing bars or other typ...
Abstract Nowadays, the natural material as agriculture waste in concrete has long been discussed. Coconut shell is one of the most vast and readily available agricultural solid waste in many tropical countries. The properties of coconut shell are examined and the use of coconut shell aggregate as construction materials are evaluated. This study focused on the effect of coconut shell as fine aggregate replacement on the performance of concrete in terms of the mechanical properties and physical...
Abstract Sustainable concrete provides a considerable solution to the increasing cost of conventional concrete production in the world. Though, it is generally described as cheap, however it’s design and cost implications for low income communities needs to be evaluated. Hence, this paper evaluates the production of sustainable concrete and its cost implication in Nigeria. Experimental design of high strength concrete made with steel fibre and bamboo fibre as reinforcement having a targete...
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...
Abstract This paper presents the results of investigation conducted to evaluate the properties of concrete containing aluminum Roofing Sheet Waste as partial replacement of cement by weight. The properties investigated included the setting times of cement-ARSW paste, workability, density, compressive strength using 168 numbers of 150 x 150 x 150 mm cube specimens. The chemical compositions and pozzolanic properties were also investigated. The results showed that: (I.) the chemical composition...
ABSTRACT Concrete made from ordinary Portland cement continues to be used as the main construction materials because of its durability and strength characteristics in service life. But the contrary becomes the case when such concrete is exposed to aggressive environment created by the prevalence of chloride ions that are common in marine/coastal environment characterized by temperature extremes, that is peculiar to Nigeria. Hot marine and coastal environment, constitute an aggressive environm...
The suitability of palm kernel shell as a partial replacement of fine aggregate in concrete was researched to verify if concrete made with palm kernel shells meet some minimum standard prescribed for strength and density. Based on British standard classification of fine aggregate as aggregates passing the number 4 sieve of 4.75mm size or slightly higher sizes depending on local requirement, crushed palm kernel shells of particle diameter not greater than 5.0mm was used to replace river sand a...
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...
Abstract This research tends to compare the workability and compressive strength of granite against periwinkle and palm kernel shells as coarse aggregates in concrete production. Specific objective is to determine the workability of local substitute for granite using periwinkle and palm kernel shell as coarse aggregate, and to compare the compressive strengths of periwinkle and palm kernel shells with granite based concrete using different concrete mixes. The One-hundred and eight cubes p...
Consider a steel-rust-concrete composite consisting of a circular cylindrical concrete cover and a coaxial uniformly corroding steel reinforcement. Prediction of the amount of rust penetrated into the microcracks of concrete cover from a set of data measured at the surface of the concrete is of particular interest. The steel is assumed to be linear isotropic and rust follows a power law stress–strain relation. For the concrete, anisotropic behavior and post-cracking softening model is emplo...
This paper presents the findings of a research work conducted on how to improve the mechanical properties of concrete using Date Palm Seed Ash (DPSA) as partial replacement of cement. The DPSA used was obtained by controlled burning of date palm seed in a kiln at a maximum temperature of 630oC for eight hours and air cooled afterwards. The ash obtained was sieved through 75μm sieve and its oxide composition analysed using X-ray fluorescence (XRF) procedures. DoE method of mix design was used...
Abstract The paper presents the results of investigation conducted on foamed aerated concrete – a lightweight concrete - with a view to determining its potential as a construction material in Nigeria. The properties investigated on foamed aerated concrete having a designed density of 1600kg/m3 were: workability, density, compressive strength, tensile strength, and the water absorption capacity. The results showed that at the designed density adopted for this work, the material was workable ...
Abstract Provision of affordable housing especially for low-income earners, which forms the majority of the population, continues to be elusive in the nations of world. The major reason given for this is the high cost of building and construction materials. Concrete and concrete products constitute the major building construction materials. However, cement which is the main binder in concrete production has been identified as the major contributor to increasing high cost of construction. This...
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...