Abrahams Mwasha

Abrahams Mwasha
University of the West Indies, St. Augustine | UWI · Department of Civil and Environmental Engineering

About

40
Publications
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605
Citations

Publications

Publications (40)
Article
Being an industrial by product, the use of electric arc furnace slag as aggregates could produce highly sustainable concrete. This paper compares the calculated and the predicted packing density values of electric arc furnace slag. By using fine aggregate content of 25%, 50%, 65%, 75% and 90% respectively of electric arc furnace slag, the packing d...
Article
Replacing cement which has a high carbon footprint and high embodied energy contributes to a reduction in both energy consumption and greenhouse gas emission. Expanded polystyrene (EPS) is explored as a replacement for cement in conventional based mortars used in joining masonry units. Five (5) mixes of EPS mortar made from EPS beads dissolved in a...
Article
This paper evaluates the physical characteristics of two recycled materials and the pollutant removal efficiencies of four 0.2 m2 tanked permeable pavement rigs in the laboratory, that contained either natural aggregates or these recycled materials in the sub-base. The selected recycled materials were Crushed Concrete Aggregates (CCA) and Cement-bo...
Article
Full-text available
In most developing countries with a tropical climate, the benefits of insulating external masonry walls are often overlooked, and there is little or no effort to reduce the energy consumed. Apart from the comfort challenges, there is a concern of increasing energy consumption due to the rise in air temperatures and air-conditioning loads in buildin...
Article
Permeable pavements are engineered to temporarily store water to reduce flooding during rainfall events. Permeable pavements are distinguished primarily based on their surface materials which can vary from concrete, asphalt, clay brick, concrete pavers or plastic grids. This paper examined the effect of lightweight carbon-negative aggregates (CNA)...
Article
In this paper, a method of developing high-strength concrete from recycled aggregates is proposed based on particle packing optimization (PPO) methods and presoaking of recycled aggregates. A total of 300 samples of concrete manufactured using 100% recycled aggregates and natural aggregates were analyzed and tested at 7, 14, and 28 days. On compari...
Conference Paper
Sustainable development gears towards preserving the environment and conserving the rapidly diminishing natural resources such as natural resources. This research seeks to assess the performance of crushed recycled concrete aggregates (RCA) from Trinidad and Tobago as sub-base materials in permeable pavement systems (PPS) applicable to urban stormw...
Article
The use of industrial wastes as construction materials represents an attractive alternative to landfill disposal of waste especially in small Caribbean islands where arable land is very scarce. In this paper, the physical and mechanical properties of concrete using Trinidad Arcelor Mittal electric arc furnace (EAF) slag as coarse aggregates were in...
Article
The most common form of shielding utilized is lead in X-ray rooms, and little attention is given to alternative and more sustainable types of shielding materials. This work evaluates the X-ray radiation shielding parameters of concrete made with fine and coarse electric arc furnace slag aggregates and compares the transmission factor of this type o...
Article
Full-text available
Many building performance assessment methods have been developed across the world while their designed goal of achieving building sustainability is yet to be achieved. The important shortcomings of these methods include lack of life cycle performance assessment framework for life cycle cost, life cycle energy efficiency, life cycle embodied energy,...
Article
The issue of sustainable design and assessment of the residential building envelope is a complex process that requires considering many factors including life cycle performance. As such, in an effort to develop an integrated approach that combines relevant sustainable development factors and life cycle concepts for sustainable designs, an integrate...
Article
Weighting and selection of criteria for the sustainable performance assessment of building envelope are onerous process for building designers, since the process needs to be carefully undertaken in order to adequately assess the sustainable performance of the building envelope. However, the process of selecting performance criteria and weighting th...
Article
Full-text available
Sustainable design is a design approach put in place to promote the environmental quality and the quality of building indoor environment by reducing negative impacts on building and the natural environment Also, it is a design philosophy that seeks to incorporate sustainable development concept in term of initiatives and values into sustainable bui...
Article
Currently, several building performance assessment methods are in use around the world but these methods fail to incorporate the needed sustainable energy performance indicators and sub-criteria, thus the necessity of current lack of capability to determine the actual sustainable performance of building envelope. Besides, aggregate criteria are ext...
Conference Paper
Full-text available
The assessment of building envelope sustainability using existing building performance assessment methods is still a challenge and yet to be fully addressed. This is due to the single-dimensional nature and lack of integration of sustainable performance values. Besides, the issue of sustainability assessment in the building envelope requires consid...
Article
Building energy consumption continues to grow in both developing and developed countries despite numerous methods and approaches being developed to address the problem, and a substantial part of this problem is attributed to residential energy consumption. Relying on the current methods of reducing energy consumption to achieve sustainable energy e...
Article
The use of ISO 9001 certification to improve workmanship on construction projects is a research area that is presently receiving attention due to the competitive demand for quality projects and infrastructure in the market. There is limited information, however, regarding the extent of the relationship between ISO 9001 certification and workmanship...
Article
The success of modeling the sustainable performance of the residential building envelope will be to a great extent associated to the sustainable energy performance indicators used. The sustainable energy performance indicators that these building assessment models are developed around should be chosen by taking into account the targeted objectives....
Article
Full-text available
Constrain on availability of waste landfill sites and stinging environmental regulations are the major reasons stimulating interest in the use of Limited Life Materials in construction industry. The concept of limited life geotextiles seeks to emphasize a clear definable working life, where materials are designed so that progressive loss of their c...
Article
Full-text available
The rapid growth of energy use, worldwide, hfs raised concerns over problems of energy supply and exhaustion of energy resources. Most of the developed countries are implementing building energy regulations such as energy standards, codes etc., to reduce building energy consumption. The position of developing countries with respect to energy regula...
Article
Applications of eco-friendly geotextiles are gaining a preference over traditional polymeric geotextiles as measures to reinforce earth embankments. Understanding the behaviour of these eco-friendly geotextiles sometimes known as limited life geotextiles (LLG) is in its infancy. This paper explains the behaviour of an embankment reinforced with Sis...
Article
Full-text available
One of the most inventive, sustainable strategies used in ground engineering is the substitution of biodegradable materials for non-biodegradable materials, particularly in situations where short-term ground improvement is needed. Biodegradable materials such as vegetable fibres have excellent engineering properties that could be used in the constr...
Article
On erecting an embankment on the saturated soft clay soil, the properties of both embankment and foundation soil changes with time but the rate of which these changes occur, vary some insignificant but others are very important as they enhance the stability of an embankment with time. The need to predict what the properties and behaviour will be wi...
Article
Built environment protection is important because construction represents a major contribution to climate change, resource depletion and pollution at a global level. Global strategy for more sustainable construction is a significant step towards a more successful, socially and environmental friendly atmosphere making a strong contribution to the be...
Article
Full-text available
The concept of the Limited Life Geotextiles refers to the ability of the geotextile in providing additional stability to an embankment erected on soft ground until the foundation soil achieves the desired shear strength over time. In this paper an analytical method is used to investigate the short term and long-term stability of basal reinforced em...
Article
Full-text available
Soil crusting is not only important in crop production due to its influence in infiltration of soil and seeding emergence but has colossal engineering properties enhancing stability of an engineering structure erected on the soft soil. However the stability of any engineering structure erected on these soft soils capped with crust could be faced wi...
Article
Full-text available
Once appropriate soil parameters i.e. physical and mechanical parameters, pore water pressure, slope geometry are established, slope stability checks need to be performed to ensure passive forces are greater than the active forces tending to cause a slope failure. The designer should be able to ensure that the slope is stable by assigning a certain...
Article
The estimation of the service life of embankments constructed on soft soil is a challenging task for even experienced geotechnical engineers. Factor of Safety (FOS) is usually applied to allow for uncertainty. A high Factor of Safety normally implies high cost, which is undesired. Many authors have recommended different types of equations based on...
Article
Full-text available
The purpose of this paper is to investigate the strength parameters of concrete manufactured using natural and recycled Guanapo coarse and fine aggregates and to determine by analysis any correlations between their compressive strength and splitting tensile strength testing as conducted according to ASTM C39 and ASTM C496 respectively. The results...
Article
Full-text available
The purpose of this paper is to investigate the strength parameters of concrete manufactured using natural and recycled Guanapo coarse and fine aggregates and to determine by analysis any correlations between their compressive strength and splitting tensile strength testing as conducted according to ASTM C39 and ASTM C496 respectively. The results...
Article
Full-text available
Architectural styles throughout the Caribbean are greatly influenced by three main factors: Environmental, Geological and Colonial factors. The Caribbean, upon being visited by foreign explores has gone through a number of colonial rules such as the Spanish, English, French, and Dutch. Beside colonial rulers slaves from Africans as well as Chinese,...
Article
The rapid growth of energy use, worldwide, has raised concerns over problems of energy supply, energy sustainability and exhaustion of energy resources. Energy consumption of buildings in developed countries comprises 20–40% of total energy use in EU and USA while most of these developed countries are implementing building energy standards rapidly...
Article
Full-text available
The success of using foundation shells for monopole structures is based on their configuration and the way they are supported on the subsoil and the action due to the earth layers above the foundation which reduces the danger of stability loss. Learning from nature, many trees are anchored to the ground by the growing horizontal discs of roots arou...

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Projects

Project (1)
Project
This PhD project focuses on the next generation of urban drainage systems applicable to small island developing states across the Caribbean. Sustainable urban drainage systems (SUDS) such as permeable pavements can protect and enhance natural water systems within urban developments, improve the quality of water draining from urban developments, reduce runoff and peak flows via development of on-site temporary storage measures for potential water reuse and minimisation of impervious areas, reduce potable water demands utilising stormwater as a resource through capture and reuse for non-potable purposes (gardens, irrigation, car washing etc). The research will address the stormwater treatment effects of permeable pavements under varying Caribbean weather conditions and how well permeable pavement systems operate during various environmental conditions (antecedent dry periods and heavy rainfall events). The project will analyse the structural integrity, effects of performance with road/pavement maintenance in addition to the economic benefits of permeable pavements as opposed to traditional paving methods and alternative drainage technologies.