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...
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 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...
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...
One of the most crucial factors affecting the service life of reinforced concrete (RC) structures attacked by aggressive ions is reinforcement corrosion. As the steel corrosion progresses, crack propagation in concrete medium endangers the serviceability and the strength of RC structural members. In this study, a nonlinear mathematical model for determining the displacement and stress fields in RC structures subjected to reinforcement corrosion is introduced. For corrosion products, a nonline...
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 Shelter is a basic human need. Unfortunately, decent shelter for the masses; the poor have not materialized over the years. The cost of concrete materials in building and civil engineering project has been a concern to the society. These and other things led to the research on Biological local materials that are dumped as waste in our environment, causing pollution and congestion as substitute materials. Therefore, this research work was carried out in respect to that and the researc...
Correlation and regression in this paper were employed as analytical tools to study the degree of relationship as well as the nature and strength of the relationship between green concrete properties and percentage replacement of cement with civil engineering materials. Pearson product-moment method and Spearman’s correlation coefficient were extensively used to show how correlation analysis can be practically applied in green concrete research. Least square regression line method for b...
Study of Coarse Aggregate Characteristics on Strength Properties of High Performance Concrete Using Chemical Admixtures Mushtaque Ahmed Pathan1, Rafique Ahmed2, Maryam Maira3 1Assistant Professor, 2Associate Professor, Center for Pure & Applied Geology, UoS Jamshoro, Sindh, Pakistan 3Freelancer Researcher Mehran university of Engg. & Technology Jamshoro, Sindh, Pakistan *Corresponding author: Mushtaque Ahmed Pathan | Received: 14.03.2019 | Accepted: 21.03.2019 | Published: 31.03.2019 DOI:10.2...
Abstract Ethiopia’sconstructionindustryisaggressivelyexpandingthaneverbefore.Cementisthemostessentialandexpensivematerialin thisregard.Cementtakes10%–15%byvolumeofconcrete.Nowadays,theconstructionindustryischallengedbythescarcityof cementandpriceescalationofthecementmarket.However,scholarstrytoreplacecementwithpozzolanicmaterial.Besidesthis, theyinvestigatedthatbambooleafashpossessespozzolanicproperties.Ethiopiahasabout850,000hectaresoflowlandbamboo,soitisgoodtoutilizebambooleafashasarepl...
Abstract The purpose of this paper is to study the important engineering properties of the volcanic rocks present with the Nagar Parkar Granites located from Sindh University Campus Jamshoro 5 h 44 min (355.3 km) via Hyderabad-Badin Road and 5 h 57 min (323.5 km) via Naukot-Mithi Road and Islamkot, the rocks look suitable for pavement and concrete aggregates. Numbers of standard tests were conducted. Which included; Specific Gravity, Gradation, Soundness, Particle shape and Surface Texture Ab...
Abstract Crushed stone is a by-product of crushing stone which has been considered as unsalable and of no significant value. But entrepreneurs seek to use all resources and reduce waste to increase their profit margin and thus utilization of crushed stones will reduce pollution of; natural habitat, air, water and soil. Not much has been done in stone dust utilization and thus this paper examines not only the technological feasibility of using quarry dust as a concrete building material but a...
An inquiry on the blatant effectiveness of manure on zooplanktons and water quality in a concrete pond culture was reviewed within durations of twelve weeks. Zooplanktons were obtained using scooping net and water sample analysisdetermined using standard techniques. Result revealed a higher culture of zooplanktons using poultry manure than those from cow dungs: 10 zooplankton species belonging to Rotifera, Cladocera and Crustacea was recorded with Brachionuscalyciflorusand Brachionusleydigi, ...
In developing processing machines for plant materials, the frictional property of the seed on structural surfaces of Mild steel (MS), Plywood (PW), Concrete (CC) and Glass (GL) is a parameter which needs to be measured. In this study, the static coefficient of friction of two Nigerian beniseed accessions (Yandev-55 and E8) were determined at moisture content levels of 5.3, 10.6, 16.1 and 22.4 per cent (wet basis). These were used as inputs into designing a beniseed oil expeller. A - 2 x 4 fac...
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...