F. Udoeyo - Academia.edu (original) (raw)

Papers by F. Udoeyo

Journal of Materials in Civil Engineering, 2011

... Felix F. Udoeyo, Chinedu IO Anyanwu ... The authors are grateful to Professor OJ Eze-Uzomaka ... more ... Felix F. Udoeyo, Chinedu IO Anyanwu ... The authors are grateful to Professor OJ Eze-Uzomaka and the Department of Civil Engineering, University of Nigeria, Nsukka, for the assistance offered and the access to the facilities at the material laboratory of the department. ...

Journal of Materials in Civil Engineering, 2011

[Journal of Materials in Civil Engineering 23, 711 (2011)]. Robert Brooks, Felix F. Udoeyo, Keert... more [Journal of Materials in Civil Engineering 23, 711 (2011)]. Robert Brooks, Felix F. Udoeyo, Keerthi V. Takkalapelli. Abstract. ... Unlike fly ash, there are limited numbers of studies about the possible utilization of LSD and LKD in construction (Okagbue and Yakubu 2000). ...

This paper presents the results of a laboratory investigation on the efficiency of the boiling wa... more This paper presents the results of a laboratory investigation on the efficiency of the boiling water method of accelerated strength testing to predict the 28-day compressive strength of laterized concrete (concrete containing laterite as full or partial replacement of sand). The results of the work showed that the accelerated strength of the concrete was between 72 and 84 % of its 28 days strength. A regression model relating the accelerated strength to the 28-day compressive strength based on the generated data is herein proposed as a power equation for use by engineers and other construction professionals for quality control and early strength assessment during construction of civil engineering infrastructure involving laterized concrete.

This research presents the results of an experimental program to investigate the strength perform... more This research presents the results of an experimental program to investigate the strength performance of laterized concrete (LATCON) when subjected to elevated temperatures of 200, 400 and 600oC. Six concrete mixes incorporating 0, 10, 20, 30, 40 and 50% Laterite as a replacement by weight of sand was prepared. After heat pretreatment specimens were cooled using either rapid cooling (water-cooling) or natural cooling (air-cooling). An analysis of variance test shows that exposure temperature, cooling regime, and the ir interaction have a significant influence on the compressive strength of the samples. When subjected to the investigated temperatures specimens experienced strength losses that increased with temperature. This study further reveals that air-cooled concrete specimens maintained higher residual strength values than water-cooled specimens. A comparison of the residual compressive strength data obtained in this study with code provisions in Eurocode and CE B d esign curve ...

Thirty concrete mixes of differing water-binder ratio containing 0, 10, 20, 30, 40 and 50 % later... more Thirty concrete mixes of differing water-binder ratio containing 0, 10, 20, 30, 40 and 50 % laterite as a partial replacement for sand were used to prepare laterized concrete specimens for the study of the effect of nonstandard curing methods on the strength of specimen. The effectiveness of a curing method was measured quantitatively as the ratio of the compressive strength of specimen cured using the non-standard method to those cursed using the standard water-curing method specified in the BS1881: Part 3:1970 (control). The results of the investigation show that with continuous wetting of the nonstandard curing media by sprinkling with water, the strength of the concrete obtained could be comparable to those cured using the control method. Of the four nonstandard curing methods considered in the study it was observed that the strength of sand- and sawdust-cured specimen were in some instances the same as or higher than those of the standard cured specimens at early age (7 days). ...

This paper presents the results of an experimental program that investigates the influence of spe... more This paper presents the results of an experimental program that investigates the influence of specimen geometry on the compressive and split tensile strength of laterized concrete (LATCON). Four cylinder sizes were considered for the investigations: O150 mm × 300 mm, O150 mm × 250 mm, O100 mm × 200 mm and O100 mm × 100 mm. Analysis of variance tests showed that specimen geometry had significant impact on the strength of LATCON. The results further revealed that the average conversion factor (ratio of 28 days strength of non-standard cylinder to the strength O150 mm x 300 mm standard cylinder) was 0.90 to 1.18 for compressive strength and 0.46 to 0.91 for split tensile strength. A regression model using the data obtained in this study is also proposed to relate the 28-day strength of O100 mm x 100 mm nonstandard cylinder to that of O150 mm × 300 mm standard cylinders.

Global Journal of Pure and Applied Sciences, 2001

This paper presents the results of an experimental program to investigate the adsorption capacity... more This paper presents the results of an experimental program to investigate the adsorption capacity of Imo laterite as a sorbent for heavy metals in contaminant barriers. The study reveals that the adsorption capacity of the soil for Pb, Cd, and As increases with increase in sorbate concentration. Based on the obtained results it was established that arsenic has the highest affinity for the lateritic soil, followed by lead, and then by cadmium. The soil may be used as lining material under landfills to absorb the heavy metals so that the ground water resources could be maintained safer.

This paper presents the results of an experimental investigation of the strength and behavior of ... more This paper presents the results of an experimental investigation of the strength and behavior of concrete containing blast furnace slag (BFS) and coal fly ash (CFA) as a partial replacement for ordinary Portland cement (OPC). Test results of the study show that the designed strength was exceeded and that the ductility ratio and the safety margin against brittle failure of concrete containing these industrial by-products were comparable to those of the reference concrete (normal ordinary Portland cement concrete), proving the feasibility of using the waste materials as alternative construction materials.

This paper presents the results of a laboratory investigation on the efficiency of the boiling wa... more This paper presents the results of a laboratory investigation on the efficiency of the boiling water method of accelerated strength testing to predict the 28-day compressive strength of laterized concrete (concrete containing laterite as full or partial replacement of sand). The results of the work showed that the accelerated strength of the concrete was between 72 and 84% of its 28 days strength. A regression model relating the accelerated strength to the 28-day compressive strength based on the generated data is herein proposed as a power equation for use by engineers and other construction professionals for quality control and early strength assessment during construction of civil engineering infrastructure involving laterized concrete.

Water- retted Kenaf fibers were used as reinforcement in mortar composites of size, 650 mm × 450 ... more Water- retted Kenaf fibers were used as reinforcement in mortar composites of size, 650 mm × 450 mm × 8 mm. Three fiber contents (0.5 %, 1.0 % and 1.5 %) and four fiber lengths (20 mm, 30 mm, 40 mm and 50 mm) were considered in the study. Physical and mechanical characteristics of the composites were evaluated according to ASTM and other appropriate standards. The results of the experimental program showed that although the bending capacity ofkenaf fiber-reinforced mortar sheet decreased with increase in fiber content, the flexural toughness and the impact resistance of the composite were enhanced with higher content of the fiber, compared with the control composites (composite without fiber). The water absorption and the fire resistance of the composite were also observed to be within acceptable limits specified by relevant standards.

Journal of Materials in Civil Engineering, Apr 1, 2002

Journal of Materials in Civil Engineering, Aug 1, 2000

IJRRAS 4 (1) ● July 2010 Udoeyo & al. ● Imo Lateritic Soil as a Sorbent for Heavy Metals 1 IM... more IJRRAS 4 (1) ● July 2010 Udoeyo & al. ● Imo Lateritic Soil as a Sorbent for Heavy Metals 1 IMO LATERITIC SOIL AS A SORBENT FOR HEAVY METALS Felix F. Udoeyo1, Robert Brooks2, Hilary Inyang3 & Sunyoung Bae4. 1 Assistant Professor, Temple University, Dept. ...

Journal of Structural Engineering, Dec 1, 1995

This paper focuses on a study of the variations in geometrical quantities of reinforced-concrete ... more This paper focuses on a study of the variations in geometrical quantities of reinforced-concrete members on three large project sites in Nigeria. Poor inspection enforcement during construction, among other factors, was identified as being responsible for the ...

... Felix F. Udoeyo1, Robert Brooks2, Philip Udo-Inyang3& Richard O. Nsan4 1Assistant Pro... more ... Felix F. Udoeyo1, Robert Brooks2, Philip Udo-Inyang3& Richard O. Nsan4 1Assistant Professor, Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA 19122. ... [8]. FF Udoeyo, R. Brooks, C. Utam, P. Udo-Inyang, EC Ukpong, Effect of non ...

Journal of Materials in Civil Engineering, Mar 14, 2003

[Journal of Materials in Civil Engineering 15, 205 (2003)]. Felix F. Udoeyo, Sanni A. Abubakar. A... more [Journal of Materials in Civil Engineering 15, 205 (2003)]. Felix F. Udoeyo, Sanni A. Abubakar. Abstract. ... Strength development of MCA concrete as percentage of 28-day strength: (a) 10% MCA; (b) 15% MCA; (c) 20% MCA; (d) 25% MCA; (e) 30% MCA.

Journal of Materials in Civil Engineering, 2011

... Felix F. Udoeyo, Chinedu IO Anyanwu ... The authors are grateful to Professor OJ Eze-Uzomaka ... more ... Felix F. Udoeyo, Chinedu IO Anyanwu ... The authors are grateful to Professor OJ Eze-Uzomaka and the Department of Civil Engineering, University of Nigeria, Nsukka, for the assistance offered and the access to the facilities at the material laboratory of the department. ...

Journal of Materials in Civil Engineering, 2011

[Journal of Materials in Civil Engineering 23, 711 (2011)]. Robert Brooks, Felix F. Udoeyo, Keert... more [Journal of Materials in Civil Engineering 23, 711 (2011)]. Robert Brooks, Felix F. Udoeyo, Keerthi V. Takkalapelli. Abstract. ... Unlike fly ash, there are limited numbers of studies about the possible utilization of LSD and LKD in construction (Okagbue and Yakubu 2000). ...

This paper presents the results of a laboratory investigation on the efficiency of the boiling wa... more This paper presents the results of a laboratory investigation on the efficiency of the boiling water method of accelerated strength testing to predict the 28-day compressive strength of laterized concrete (concrete containing laterite as full or partial replacement of sand). The results of the work showed that the accelerated strength of the concrete was between 72 and 84 % of its 28 days strength. A regression model relating the accelerated strength to the 28-day compressive strength based on the generated data is herein proposed as a power equation for use by engineers and other construction professionals for quality control and early strength assessment during construction of civil engineering infrastructure involving laterized concrete.

This research presents the results of an experimental program to investigate the strength perform... more This research presents the results of an experimental program to investigate the strength performance of laterized concrete (LATCON) when subjected to elevated temperatures of 200, 400 and 600oC. Six concrete mixes incorporating 0, 10, 20, 30, 40 and 50% Laterite as a replacement by weight of sand was prepared. After heat pretreatment specimens were cooled using either rapid cooling (water-cooling) or natural cooling (air-cooling). An analysis of variance test shows that exposure temperature, cooling regime, and the ir interaction have a significant influence on the compressive strength of the samples. When subjected to the investigated temperatures specimens experienced strength losses that increased with temperature. This study further reveals that air-cooled concrete specimens maintained higher residual strength values than water-cooled specimens. A comparison of the residual compressive strength data obtained in this study with code provisions in Eurocode and CE B d esign curve ...

Thirty concrete mixes of differing water-binder ratio containing 0, 10, 20, 30, 40 and 50 % later... more Thirty concrete mixes of differing water-binder ratio containing 0, 10, 20, 30, 40 and 50 % laterite as a partial replacement for sand were used to prepare laterized concrete specimens for the study of the effect of nonstandard curing methods on the strength of specimen. The effectiveness of a curing method was measured quantitatively as the ratio of the compressive strength of specimen cured using the non-standard method to those cursed using the standard water-curing method specified in the BS1881: Part 3:1970 (control). The results of the investigation show that with continuous wetting of the nonstandard curing media by sprinkling with water, the strength of the concrete obtained could be comparable to those cured using the control method. Of the four nonstandard curing methods considered in the study it was observed that the strength of sand- and sawdust-cured specimen were in some instances the same as or higher than those of the standard cured specimens at early age (7 days). ...

This paper presents the results of an experimental program that investigates the influence of spe... more This paper presents the results of an experimental program that investigates the influence of specimen geometry on the compressive and split tensile strength of laterized concrete (LATCON). Four cylinder sizes were considered for the investigations: O150 mm × 300 mm, O150 mm × 250 mm, O100 mm × 200 mm and O100 mm × 100 mm. Analysis of variance tests showed that specimen geometry had significant impact on the strength of LATCON. The results further revealed that the average conversion factor (ratio of 28 days strength of non-standard cylinder to the strength O150 mm x 300 mm standard cylinder) was 0.90 to 1.18 for compressive strength and 0.46 to 0.91 for split tensile strength. A regression model using the data obtained in this study is also proposed to relate the 28-day strength of O100 mm x 100 mm nonstandard cylinder to that of O150 mm × 300 mm standard cylinders.

Global Journal of Pure and Applied Sciences, 2001

This paper presents the results of an experimental program to investigate the adsorption capacity... more This paper presents the results of an experimental program to investigate the adsorption capacity of Imo laterite as a sorbent for heavy metals in contaminant barriers. The study reveals that the adsorption capacity of the soil for Pb, Cd, and As increases with increase in sorbate concentration. Based on the obtained results it was established that arsenic has the highest affinity for the lateritic soil, followed by lead, and then by cadmium. The soil may be used as lining material under landfills to absorb the heavy metals so that the ground water resources could be maintained safer.

This paper presents the results of an experimental investigation of the strength and behavior of ... more This paper presents the results of an experimental investigation of the strength and behavior of concrete containing blast furnace slag (BFS) and coal fly ash (CFA) as a partial replacement for ordinary Portland cement (OPC). Test results of the study show that the designed strength was exceeded and that the ductility ratio and the safety margin against brittle failure of concrete containing these industrial by-products were comparable to those of the reference concrete (normal ordinary Portland cement concrete), proving the feasibility of using the waste materials as alternative construction materials.

This paper presents the results of a laboratory investigation on the efficiency of the boiling wa... more This paper presents the results of a laboratory investigation on the efficiency of the boiling water method of accelerated strength testing to predict the 28-day compressive strength of laterized concrete (concrete containing laterite as full or partial replacement of sand). The results of the work showed that the accelerated strength of the concrete was between 72 and 84% of its 28 days strength. A regression model relating the accelerated strength to the 28-day compressive strength based on the generated data is herein proposed as a power equation for use by engineers and other construction professionals for quality control and early strength assessment during construction of civil engineering infrastructure involving laterized concrete.

Water- retted Kenaf fibers were used as reinforcement in mortar composites of size, 650 mm × 450 ... more Water- retted Kenaf fibers were used as reinforcement in mortar composites of size, 650 mm × 450 mm × 8 mm. Three fiber contents (0.5 %, 1.0 % and 1.5 %) and four fiber lengths (20 mm, 30 mm, 40 mm and 50 mm) were considered in the study. Physical and mechanical characteristics of the composites were evaluated according to ASTM and other appropriate standards. The results of the experimental program showed that although the bending capacity ofkenaf fiber-reinforced mortar sheet decreased with increase in fiber content, the flexural toughness and the impact resistance of the composite were enhanced with higher content of the fiber, compared with the control composites (composite without fiber). The water absorption and the fire resistance of the composite were also observed to be within acceptable limits specified by relevant standards.

Journal of Materials in Civil Engineering, Apr 1, 2002

Journal of Materials in Civil Engineering, Aug 1, 2000

IJRRAS 4 (1) ● July 2010 Udoeyo & al. ● Imo Lateritic Soil as a Sorbent for Heavy Metals 1 IM... more IJRRAS 4 (1) ● July 2010 Udoeyo & al. ● Imo Lateritic Soil as a Sorbent for Heavy Metals 1 IMO LATERITIC SOIL AS A SORBENT FOR HEAVY METALS Felix F. Udoeyo1, Robert Brooks2, Hilary Inyang3 & Sunyoung Bae4. 1 Assistant Professor, Temple University, Dept. ...

Journal of Structural Engineering, Dec 1, 1995

This paper focuses on a study of the variations in geometrical quantities of reinforced-concrete ... more This paper focuses on a study of the variations in geometrical quantities of reinforced-concrete members on three large project sites in Nigeria. Poor inspection enforcement during construction, among other factors, was identified as being responsible for the ...

... Felix F. Udoeyo1, Robert Brooks2, Philip Udo-Inyang3& Richard O. Nsan4 1Assistant Pro... more ... Felix F. Udoeyo1, Robert Brooks2, Philip Udo-Inyang3& Richard O. Nsan4 1Assistant Professor, Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA 19122. ... [8]. FF Udoeyo, R. Brooks, C. Utam, P. Udo-Inyang, EC Ukpong, Effect of non ...

Journal of Materials in Civil Engineering, Mar 14, 2003

[Journal of Materials in Civil Engineering 15, 205 (2003)]. Felix F. Udoeyo, Sanni A. Abubakar. A... more [Journal of Materials in Civil Engineering 15, 205 (2003)]. Felix F. Udoeyo, Sanni A. Abubakar. Abstract. ... Strength development of MCA concrete as percentage of 28-day strength: (a) 10% MCA; (b) 15% MCA; (c) 20% MCA; (d) 25% MCA; (e) 30% MCA.