Omar Al Amoudi | King Fahd University of Petroleum and Minerals (original) (raw)
Papers by Omar Al Amoudi
The coarse aggregates utilized in concrete by the construction industry in the Eastern Province o... more The coarse aggregates utilized in concrete by the construction industry in the Eastern Province of the Kingdom of Saudi Arabia are mostly of dolomotic limestone. These aggregates generate considerable dust on crushing and some of them do not meet all the ASTM C 33 criteria. In view of this there is an apprehension as to the applicability of those criteria,
Magazine of Concrete Research, 1999
Applied Radiation and Isotopes, 2015
Atoms for Peace an International Journal
Chloride-induced reinforcement corrosion is the principal cause of deterioration of concrete stru... more Chloride-induced reinforcement corrosion is the principal cause of deterioration of concrete structures in the Arabian Gulf and the world over. Preventive measures against corrosion require maintaining the chloride and sulphate concentration in concrete below the threshold limits specified by the standards. This requires monitoring the chloride and sulphate concentration in concrete, and a nondestructive technique is preferable for this purpose. The Prompt-Gamma Neutron Activation Analysis (PGNAA) technique can be used to monitor the concentration of corrosive elements in concrete specimens. An accelerator-based PGNAA setup has been developed to measure the chloride and sulphate concentration in concrete. The PGNAA technique has been utilised successfully to measure the elemental composition of concrete. In this regard, several studies were undertaken to determine the calcium, silicon, chloride and sulphate concentration in the concrete specimens. Furthermore, the concentration of c...
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine
Pozzolanic materials are added to Portland cement concrete to increase its durability, particular... more Pozzolanic materials are added to Portland cement concrete to increase its durability, particularly corrosion-resistance. In this study the elemental composition of a pozzolanic cement concrete was measured non-destructively utilizing an accelerator-based Prompt Gamma Ray Neutron Activation Analysis (PGNAA) setup. The optimum size of the pozzolanic cement concrete specimen was obtained through Monte Carlo simulations. The simulation results were experimentally verified through the gamma-ray yield measurement from the pozzolanic cement concrete specimens as a function of their radii. The concentration of the pozzolanic material in the cement concrete specimens was evaluated by measuring gamma-ray yield for calcium and iron from pozzolanic cement concrete specimens containing 5-80 wt% pozzolan. A good agreement was noted between the experimental values and the Monte Carlo simulation results, indicating an excellent response of the KFUPM accelerator-based PGNAA setup for pozzolan based...
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine
Pozzolanic materials, such as fly ash (FA), silica fume (SF), and blast furnace slag (BFS) are ad... more Pozzolanic materials, such as fly ash (FA), silica fume (SF), and blast furnace slag (BFS) are added to Portland cement in concrete to prevent reinforcement steel corrosion in concrete. Further preventive measure against reinforcement steel corrosion require monitoring of chloride salts concentration in concrete using non-destructive techniques, such as the prompt gamma-ray neutron activation analysis (PGNAA) technique. Due to interferences between gamma-rays from chlorine and calcium in PGNAA technique, detection limit of chlorine in concrete strongly depends upon calcium concentration in concrete. SF mainly contains silica and its addition to cement concrete reduces overall concentration of calcium in concrete. This may result in an improvement in detection limit of chlorine in SF-based concrete in PGNAA studies. Particularly for chlorine detection using 6.11 and 6.62 MeV prompt gamma-rays that strongly interfere with 6.42 MeV prompt gamma-rays from calcium. In this study, SF was ...
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine
The chlorine concentration in chloride-contaminated FA cement concrete specimens was measured usi... more The chlorine concentration in chloride-contaminated FA cement concrete specimens was measured using a portable neutron generator based prompt gamma-ray neutron activation (PGNAA) setup with the neutron generator and the gamma-ray detector placed side-by-side on one side of the concrete sample. The minimum detectable concentration of chlorine in FA cement concrete measured in the present study was comparable with previous results for larger accelerator based PGNAA setup. It shows the successful application of a portable neutron generator in concrete corrosion studies.
Applied Radiation and Isotopes
Single prompt gamma ray energy has been evaluated to measure chlorine concentration in fly ash (F... more Single prompt gamma ray energy has been evaluated to measure chlorine concentration in fly ash (FA), Super-Pozz (SPZ) and blast furnace slag (BFS) cement concrete specimens using a portable neutron generator-based Prompt Gamma Neutron Activation (PGNAA) setup. The gamma ray yield data from chloride concentration measurement in FA, SPZ and BFS cement concretes for 2.86–3.10, 5.72 and 6.11 MeV chlorine gamma rays were analyzed to identify a gamma ray with common slope (gamma ray yield/Cl conc. wt%) for the FA, BFS and SPZ cement concretes. The gamma ray yield data for FA and SPZ cement concretes with varying chloride concentration were measured previously using a portable neutron generator-based PGNAA setup. In the current study, new data have been measured for chlorine detection in the BFS cement concrete using a portable neutron generator-based PGNAA setup for 2.86–3.10, 5.72, and 6.11 MeV chlorine gamma rays. The minimum detection limit of chlorine in BFS cement concrete (MDC) was ...
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
The chlorine concentration in Superpozz (SPZ) cement concrete was analyzed using a newly designed... more The chlorine concentration in Superpozz (SPZ) cement concrete was analyzed using a newly designed prompt gamma-ray neutron activation (PGNAA) setup utilizing a portable neutron generator. The setup, which mainly consists of a neutron source along with its moderator placed side by side with a shielded gamma-ray detector, allows determining chloride concentration in a concrete structure from one side. The setup has been tested through chlorine detection in chloride-contaminated Superpozz (SPZ) cement concrete specimens using 6.11 and 2.86±3.10 MeV chlorine prompt gamma-rays. The optimum 0.032±0.012 wt% value of Minimum Detectable Concentration (MDC) of chlorine in SPZ cement concrete measured in this study shows a successful application of a portable neutron generator in chloride analysis of concrete structure for corrosion studies.
Construction Materials
... Minerals, Dhahran, ARABIE SAOUDITE (4) Institute, King Fahd University of Petroleum and Miner... more ... Minerals, Dhahran, ARABIE SAOUDITE (4) Institute, King Fahd University of Petroleum and Minerals, Dhahran, ARABIE SAOUDITE (5) Institute, King Fahd University of Petroleum and Minerals, Dhahran, ARABIE SAOUDITE ... Faire une nouvelle recherche Make a new search.
Journal of Environmental Science and Health Part A Toxic/Hazardous Substances & Environmental Engineering
A new atomic line at 594.8 nm of neutral chlorine (Cl I) has been used as a marker to quantify th... more A new atomic line at 594.8 nm of neutral chlorine (Cl I) has been used as a marker to quantify the amount of chloride present in the concrete sample using Laser Induced Breakdown Spectroscopy (LIBS). Although, the relative intensity of the 594.8 nm line is 1000-fold less than that of the most commonly used intense atomic line of Cl I at 837.5 nm reported in the literature, the limit of detection of chlorine achieved with our set-up in the concrete sample using the new line is comparable with the 837.5 nm. This clearly indicates that the sensitivity of the LIBS system for detection of chlorine in concrete sample using 594.8 nm is at least 1000-fold more than the one using 837.5 nm, which can be attributed to the characteristic less self absorption. LIBS data for different concentration of chloride content in concrete sample was also carried out and a calibration curve was drawn. The excitation scheme for 594.8 nm line is also proposed in this work.
Cement, Concrete and Aggregates, 1994
Page 1. Influence of sulfate ions on chloride-induced reinforcement corrosion in portland and ble... more Page 1. Influence of sulfate ions on chloride-induced reinforcement corrosion in portland and blended cement concretes Al-Amoudi, Omar Saeed Baghabra, Rasheeduzzafar, Maslehuddin, Mohammed, Abduljauwad, Sahel N. Cement, Concrete and Aggregates Vol. ...
Optics & Laser Technology, 2012
... c, Civil Engineering Department, King Fahd University of Petroleum and Minerals, Box 504, Dha... more ... c, Civil Engineering Department, King Fahd University of Petroleum and Minerals, Box 504, Dhahran 31261, Saudi Arabia. Received 20 March 2011; revised 30 June 2011; Accepted 3 September 2011. Available online 23 September 2011. ... [8] A Miziolek, V Palleschi and I ...
Materials Science Forum, 2005
Quarterly Journal of Engineering Geology and Hydrogeology, 1995
This paper describes the results of an investigation on the effect of five stabilizing agents, na... more This paper describes the results of an investigation on the effect of five stabilizing agents, namely limestone dust, marl, emulsified asphalt, cement and lime, on the properties of an arid, saline sabkha soil from eastern Saudi Arabia. Standard compaction and unconfined ...
Spectroscopy Letters, 2009
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2011
The coarse aggregates utilized in concrete by the construction industry in the Eastern Province o... more The coarse aggregates utilized in concrete by the construction industry in the Eastern Province of the Kingdom of Saudi Arabia are mostly of dolomotic limestone. These aggregates generate considerable dust on crushing and some of them do not meet all the ASTM C 33 criteria. In view of this there is an apprehension as to the applicability of those criteria,
Magazine of Concrete Research, 1999
Applied Radiation and Isotopes, 2015
Atoms for Peace an International Journal
Chloride-induced reinforcement corrosion is the principal cause of deterioration of concrete stru... more Chloride-induced reinforcement corrosion is the principal cause of deterioration of concrete structures in the Arabian Gulf and the world over. Preventive measures against corrosion require maintaining the chloride and sulphate concentration in concrete below the threshold limits specified by the standards. This requires monitoring the chloride and sulphate concentration in concrete, and a nondestructive technique is preferable for this purpose. The Prompt-Gamma Neutron Activation Analysis (PGNAA) technique can be used to monitor the concentration of corrosive elements in concrete specimens. An accelerator-based PGNAA setup has been developed to measure the chloride and sulphate concentration in concrete. The PGNAA technique has been utilised successfully to measure the elemental composition of concrete. In this regard, several studies were undertaken to determine the calcium, silicon, chloride and sulphate concentration in the concrete specimens. Furthermore, the concentration of c...
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine
Pozzolanic materials are added to Portland cement concrete to increase its durability, particular... more Pozzolanic materials are added to Portland cement concrete to increase its durability, particularly corrosion-resistance. In this study the elemental composition of a pozzolanic cement concrete was measured non-destructively utilizing an accelerator-based Prompt Gamma Ray Neutron Activation Analysis (PGNAA) setup. The optimum size of the pozzolanic cement concrete specimen was obtained through Monte Carlo simulations. The simulation results were experimentally verified through the gamma-ray yield measurement from the pozzolanic cement concrete specimens as a function of their radii. The concentration of the pozzolanic material in the cement concrete specimens was evaluated by measuring gamma-ray yield for calcium and iron from pozzolanic cement concrete specimens containing 5-80 wt% pozzolan. A good agreement was noted between the experimental values and the Monte Carlo simulation results, indicating an excellent response of the KFUPM accelerator-based PGNAA setup for pozzolan based...
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine
Pozzolanic materials, such as fly ash (FA), silica fume (SF), and blast furnace slag (BFS) are ad... more Pozzolanic materials, such as fly ash (FA), silica fume (SF), and blast furnace slag (BFS) are added to Portland cement in concrete to prevent reinforcement steel corrosion in concrete. Further preventive measure against reinforcement steel corrosion require monitoring of chloride salts concentration in concrete using non-destructive techniques, such as the prompt gamma-ray neutron activation analysis (PGNAA) technique. Due to interferences between gamma-rays from chlorine and calcium in PGNAA technique, detection limit of chlorine in concrete strongly depends upon calcium concentration in concrete. SF mainly contains silica and its addition to cement concrete reduces overall concentration of calcium in concrete. This may result in an improvement in detection limit of chlorine in SF-based concrete in PGNAA studies. Particularly for chlorine detection using 6.11 and 6.62 MeV prompt gamma-rays that strongly interfere with 6.42 MeV prompt gamma-rays from calcium. In this study, SF was ...
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine
The chlorine concentration in chloride-contaminated FA cement concrete specimens was measured usi... more The chlorine concentration in chloride-contaminated FA cement concrete specimens was measured using a portable neutron generator based prompt gamma-ray neutron activation (PGNAA) setup with the neutron generator and the gamma-ray detector placed side-by-side on one side of the concrete sample. The minimum detectable concentration of chlorine in FA cement concrete measured in the present study was comparable with previous results for larger accelerator based PGNAA setup. It shows the successful application of a portable neutron generator in concrete corrosion studies.
Applied Radiation and Isotopes
Single prompt gamma ray energy has been evaluated to measure chlorine concentration in fly ash (F... more Single prompt gamma ray energy has been evaluated to measure chlorine concentration in fly ash (FA), Super-Pozz (SPZ) and blast furnace slag (BFS) cement concrete specimens using a portable neutron generator-based Prompt Gamma Neutron Activation (PGNAA) setup. The gamma ray yield data from chloride concentration measurement in FA, SPZ and BFS cement concretes for 2.86–3.10, 5.72 and 6.11 MeV chlorine gamma rays were analyzed to identify a gamma ray with common slope (gamma ray yield/Cl conc. wt%) for the FA, BFS and SPZ cement concretes. The gamma ray yield data for FA and SPZ cement concretes with varying chloride concentration were measured previously using a portable neutron generator-based PGNAA setup. In the current study, new data have been measured for chlorine detection in the BFS cement concrete using a portable neutron generator-based PGNAA setup for 2.86–3.10, 5.72, and 6.11 MeV chlorine gamma rays. The minimum detection limit of chlorine in BFS cement concrete (MDC) was ...
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
The chlorine concentration in Superpozz (SPZ) cement concrete was analyzed using a newly designed... more The chlorine concentration in Superpozz (SPZ) cement concrete was analyzed using a newly designed prompt gamma-ray neutron activation (PGNAA) setup utilizing a portable neutron generator. The setup, which mainly consists of a neutron source along with its moderator placed side by side with a shielded gamma-ray detector, allows determining chloride concentration in a concrete structure from one side. The setup has been tested through chlorine detection in chloride-contaminated Superpozz (SPZ) cement concrete specimens using 6.11 and 2.86±3.10 MeV chlorine prompt gamma-rays. The optimum 0.032±0.012 wt% value of Minimum Detectable Concentration (MDC) of chlorine in SPZ cement concrete measured in this study shows a successful application of a portable neutron generator in chloride analysis of concrete structure for corrosion studies.
Construction Materials
... Minerals, Dhahran, ARABIE SAOUDITE (4) Institute, King Fahd University of Petroleum and Miner... more ... Minerals, Dhahran, ARABIE SAOUDITE (4) Institute, King Fahd University of Petroleum and Minerals, Dhahran, ARABIE SAOUDITE (5) Institute, King Fahd University of Petroleum and Minerals, Dhahran, ARABIE SAOUDITE ... Faire une nouvelle recherche Make a new search.
Journal of Environmental Science and Health Part A Toxic/Hazardous Substances & Environmental Engineering
A new atomic line at 594.8 nm of neutral chlorine (Cl I) has been used as a marker to quantify th... more A new atomic line at 594.8 nm of neutral chlorine (Cl I) has been used as a marker to quantify the amount of chloride present in the concrete sample using Laser Induced Breakdown Spectroscopy (LIBS). Although, the relative intensity of the 594.8 nm line is 1000-fold less than that of the most commonly used intense atomic line of Cl I at 837.5 nm reported in the literature, the limit of detection of chlorine achieved with our set-up in the concrete sample using the new line is comparable with the 837.5 nm. This clearly indicates that the sensitivity of the LIBS system for detection of chlorine in concrete sample using 594.8 nm is at least 1000-fold more than the one using 837.5 nm, which can be attributed to the characteristic less self absorption. LIBS data for different concentration of chloride content in concrete sample was also carried out and a calibration curve was drawn. The excitation scheme for 594.8 nm line is also proposed in this work.
Cement, Concrete and Aggregates, 1994
Page 1. Influence of sulfate ions on chloride-induced reinforcement corrosion in portland and ble... more Page 1. Influence of sulfate ions on chloride-induced reinforcement corrosion in portland and blended cement concretes Al-Amoudi, Omar Saeed Baghabra, Rasheeduzzafar, Maslehuddin, Mohammed, Abduljauwad, Sahel N. Cement, Concrete and Aggregates Vol. ...
Optics & Laser Technology, 2012
... c, Civil Engineering Department, King Fahd University of Petroleum and Minerals, Box 504, Dha... more ... c, Civil Engineering Department, King Fahd University of Petroleum and Minerals, Box 504, Dhahran 31261, Saudi Arabia. Received 20 March 2011; revised 30 June 2011; Accepted 3 September 2011. Available online 23 September 2011. ... [8] A Miziolek, V Palleschi and I ...
Materials Science Forum, 2005
Quarterly Journal of Engineering Geology and Hydrogeology, 1995
This paper describes the results of an investigation on the effect of five stabilizing agents, na... more This paper describes the results of an investigation on the effect of five stabilizing agents, namely limestone dust, marl, emulsified asphalt, cement and lime, on the properties of an arid, saline sabkha soil from eastern Saudi Arabia. Standard compaction and unconfined ...
Spectroscopy Letters, 2009
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2011