Papers by Hashem Al-Mattarneh
This study describes the development of statistical models to predict strength and slump of silic... more This study describes the development of statistical models to predict strength and slump of silica fume incorporated High-Performance Concrete (HPC). Experimental data of silica fume incorporated HPC mixes were used to develop and validate models. The HPC having compressive strength range of 40-113 MPa and slump range of 180-250 mm were used. Statistical models were developed by regression analysis. The results of prediction by the models showed good agreement with those of experiments and other researchers. The developed models can be used to predict slump and 28 days compressive strength of silica fume incorporated HPC.
An electromagnetic sensor was proposed to evaluate and test steel fiber concrete. The fiber conte... more An electromagnetic sensor was proposed to evaluate and test steel fiber concrete. The fiber contents, dispersions and orientations were evaluated by dielectric means. The mean measured dielectric properties can be used to determine the fiber content. Variations in the point to point dielectric are related to the fiber dispersion. Variation in the dielectric at different angles indicates the fiber orientation.
The paper deals with dielectric properties of concrete and the effect of frequency, curing time a... more The paper deals with dielectric properties of concrete and the effect of frequency, curing time and water to cement (w/c) ratio, concrete compression strength, steel fibre concrete and moisture content on the dielectric properties. The concrete dielectric properties such as transmission coefficients, reflection coefficients, dielectric constants and loss factors; were investigated using microwave nondestructive testing (MNDT) technique. The MNDT system consists of transmit and receive horn lens antennas, a vector network analyzer, mode transitions, and a printer. The horn lens antennas are used for minimizing diffraction effects due to the edges of the sample. Electromagnetic waves at microwave frequency range 7.0-13.0 GHz using free-space microwave method was used for measuring dielectric properties of concrete. Concrete specimens were prepared using different w/c ratios and different compressive strengths. Concrete dielectric properties were measured and correlated with compressive strength and w/c ratio of concrete, curing time. The experimental results indicate that microwave non-destructive technique has correlated well with to determine the compressive strength and w/c ratios of concrete. The results also show the potential to be used to determine the percentage of fiber. This technique is easy to adapt for in situ measurements.
The paper gives the results of an analytical method proposed to predict the load deflection behav... more The paper gives the results of an analytical method proposed to predict the load deflection behaviour of partially restrained slab strips. The effect of deflection prior to yield line load on the development of compressive membrane forces was incorporated in the theoretical analysis. An experimental programme was designed to cast and test ten partially restrained slab strips with different edge rigidity. A comparison has been made between the results of the proposed and one of the other methods available in the literature. The results indicate that the proposed method can predict the load deflection behaviour satisfactorily. A parametric study has been made on the load enhancement beyond yield line load and the results are presented.
American Journal of Engineering and Applied Sciences, 2009
Problem statement: For predicting workability and hardened properties of Self-Compacting Concrete... more Problem statement: For predicting workability and hardened properties of Self-Compacting Concrete (SCC) no well known explicit formulation. Approach: Statistical models were carried out to model the influence of key mixture parameter (cement, water to powder ratio, fly ash and super ...
Highway and Urban Environment, 2009
AEI 2008, 2008
Design of concrete mixtures is the process of selecting the most economical and practical proport... more Design of concrete mixtures is the process of selecting the most economical and practical proportions of all the ingredients to produce quality concrete. Because of the nature of the mix design process and all the heuristic knowledge that is associated with it, concrete mix design lends itself well to a knowledge-based application. This paper describes a prototype knowledge-based system called HPCMIX that can be used to load the experimental data, develop several statistical models to determine the responses, evaluate the predicted models, and predict the 28 days strength and slump. It can also be used to design HPC mix proportions that are subjected to specified constraints (e.g. strength and slump). It is capable of selecting proportions of mixing water, cement, supplementary cementitious materials, aggregates and superplasticizer, with consideration being given to the effects of air content as well as water contributed by superplasticizer and moisture conditions of aggregates. As most of knowledge-based systems, this system has explanation facilities, can be incrementally expanded, and has an easy to understand knowledge base. The system was tested on a sample project. The system's selection of the concrete proportions compared favourably with the expert's selection. The system is very useful for civil engineering students as well as practicing engineers.
APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577), 2001
A fast and nondestructive method for measurement of compressive strength and water cement ratio (... more A fast and nondestructive method for measurement of compressive strength and water cement ratio (w/c), will be of great interest to the construction industry because compressive strength is one of the most important parameter in the structural design of concrete structures. Also, compressive strength is specified for building code compliance. In this paper, a study was conducted to apply a
Student Conference on Research and Development, 2002
Methods available for measuring water quality rivers, lakes, reservoirs, . . . etc. involve in th... more Methods available for measuring water quality rivers, lakes, reservoirs, . . . etc. involve in the collection of water samples for these water bodies and subsequent chemical laboratory analysis. These methods and technologies provide accurate measurements and evaluation of water quality for a point in time and space, they are time conswning, expensive, and do not provide either the continuous, spatial or temporal view of water quality needed for monitoring, assessing, or managing water quality. In this paper, the measnred complex reflection coefficients and complex permittivity (dielectric constant and loss factor) of water using microwave open-ended rectangular waveguide system called microwave reflectometer system (MRS) will be used to monitor the water quality. MRS uses the electromagnetic properties of water to indicate the quality parameters of waste. This system may offers the potential of relatively inexpensive, frequent, continuous and synoptic measurements using sensors immersed in the water bodies (reservoirs, rivers, lakes, treatment plant). Dielectric properties of water of different salinity were measured and evaluated.
Asian Conference on Sensors, 2003. AsiaSense 2003.
Asia-Pacific Conference on Applied Electromagnetics, 2003. APACE 2003., 2003
Soil contamination with petroleum hydrocarbons has become one of the most serious problems due to... more Soil contamination with petroleum hydrocarbons has become one of the most serious problems due to its negative repercussion on ecosystems. For this reason, different analytical techniques have been developed to evaluate the quantity and the quality of organic pollutants using electrochemical techniques, and a geophysical methods have been developed which utilizes the contrast caused by the contaminant on physical properties of the soil dielectric methods shows high potential for characterization kerosene contaminated soil and determination of the level of contaminant. The potential of dielectric measuring techniques for soil characterization has not been fully explored. For this purpose, dielectric measurements, in the frequency range from 100 kHz to1000 kHz, were carried out in sandy soil samples, contaminated with solutions of kerosene, at different concentrations. The differences of the dielectric behavior with contaminant content suggest that the monitoring of complex dielectric constant has the potential to quantify contaminants.
Applied Mechanics and Materials, 2014
A new measurement system is developed to monitor the early hydration of cementitious materials ba... more A new measurement system is developed to monitor the early hydration of cementitious materials based on measured dielectric properties of the material in low electromagnetic frequency range. The objectives of this paper were to evaluate the changes in the electromagnetic properties for samples with different fly ash content and to establish the reliability of the measurement technique by comparing with results obtained by traditional method such as thermal method that is either time consuming or impractical. The method adopted in the present experimental work is a parallel plate electrode system (PPES). The suggested monitoring device for concrete hydration and strength development is based on the relationship between the electromagnetic properties such as dielectric constant, loss factor and the strength development during hydration process and curing time. In this research the electromagnetic properties of concrete is found to be dependent on the hydration and strength of concrete. Therefore the development of microstructure and concrete compressive strength can be determined by monitoring its electromagnetic properties in the frequency range of 1 to 100 kHz.
Applied Mechanics and Materials, 2014
Soil contamination with petroleum hydrocarbons has become one of the most serious problems due to... more Soil contamination with petroleum hydrocarbons has become one of the most serious problems due to its negative repercussion on ecosystems. For this reason, different analytical techniques have been developed to evaluate the quantity and the quality of organic pollutants using electrochemical techniques, and a geophysical methods have been developed which utilizes the contrast caused by the contaminant on physical properties of the soil dielectric methods shows high potential for characterization kerosene contaminated soil and determination of the level of contaminant. The potential of dielectric measuring techniques for soil characterization has not been fully explored. For this purpose, dielectric measurements, in the frequency range from 100 kHz to1000 kHz, were carried out in sandy soil samples, contaminated with solutions of kerosene, at different concentrations. The differences of the dielectric behavior with contaminant content suggest that the monitoring of complex dielectric constant has the potential to quantify contaminants.
Microwave nondestructive testing methods are fast, contactless, accurate and continuous technique... more Microwave nondestructive testing methods are fast, contactless, accurate and continuous techniques for evaluation of moisture content, slope-of-grain, density of knots and specific gravity of the timber. Dielectric properties of timber are determined by its moisture content, slope-of-grain and density. So they can be used for non-destructive evaluation of timber. In this paper dielectric properties were deduced from the reflection and transmission coefficient measurements of Malaysian timber specimens using a free-space measurement system in the frequency range of 8-12.5 GHz. Dielectric properties were evaluated over different angles between the electric field and the direction of grain. Relationships between density, modulus of elasticity, strength, grain angle (angle between the direction of grain and electric field) and dielectric properties of Malaysian timber were established.
The existence of moisture in concrete is a major cause of damage to the concrete structure, so th... more The existence of moisture in concrete is a major cause of damage to the concrete structure, so there is an increasing need for nondestructive detection and monitoring of moisture content in concrete. Microwave nondestructive testing (MNDT) techniques have advantages over other NDT methods (such as radiography, ultrasonic, and eddy current) regarding low cost, good penetration in nonmetallic materials, good resolution and requirement of only one face of material for testing. In this paper, microwave open-ended rectangular waveguide was used to measure the electromagnetic properties of Portland cement concrete (PCC) over a frequency range of 7.0 to 13.0 GHz. PCC specimens of six different water cement ratio (w͞c) were prepared. PCC dielectric properties were evaluated at different moisture content ranges from saturated to oven dry. The results show reflection coefficients, dielectric constants and loss factors increase with increasing moisture content of PCC. At the same values of moisture content, the reflection coefficients, dielectric constants and loss factors of PCC increase with decreasing w͞c ratio. The measured values of reflection coefficients, dielectric constants and loss factors can be used to determine the moisture content of PCC.
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Papers by Hashem Al-Mattarneh