Vol. 39 No. 3 (2020) | Nigerian Journal of Technology

Published: 2020-09-16

Investigations of the structural characteristics of concrete produced from recycled aggregates at varying water/cement ratios

A.W. Otunyo, B.G. Jephter

640-646

DOI:

10.4314/njt.v39i3.1

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Critical motivational factors for enhancing employee performance in construction firms based on correlation and principal component analyses

M.B. Zailani, A.G. Ibrahim, Y. Bahago

647-653

DOI:

10.4314/njt.v39i3.2

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Creep and morphological evaluation of polypropylene waste modified asphalt for pavement applications

H.S. Otuoze, A.A. Shuaibu, H.A. Ahmed, I.T. Suleiman, I. Bello, K.O. Yusuf

654-664

DOI:

10.4314/njt.v39i3.3

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Delivering sustainable transport infrastructure projects (railway) in Nigeria: Frameworks, indicators, method and tools

O.M. Oraegbune, O.O. Ugwu

665 – 679

DOI:

10.4314/njt.v39i3.4

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Pozzolanic and mechanical properties of Date Palm Seed Ash (Dpsa) concrete

A.S.J. Smith, G. Xu, M.J. Garba, M.Y. Aliyu

680-686

DOI:

10.4314/njt.v39i3.5

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Rare earth elements and stable sulphur (δ34s) isotope of baryte mineralization in Liji Area, Northern Benue trough, northeastern Nigeria

H.I. Kamale, J.M. El-Nafaty, A.O. Umaru, B. Shettima, M.U. Obidiegwu

687-693

DOI:

10.4314/njt.v39i3.6

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Assessment of cement concrete partially replaced with polystyrene and plantain peel ash

O.O. Aderinola, Y. Yusuf, O.O. Omotayo

694 – 700

DOI:

10.4314/njt.v39i3.7

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Characteristics of almond leaf-ash cement stabilized lateritic soil

D.B. Eme, K.E. Ohwerhi

701-709

DOI:

10.4314/njt.v39i3.8

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Effect of nanosilica on the mechanical and microstructural properties of a normal strength concrete produced in Nigeria

I.M. Adamu, J.M. Kaura, A. Lawan, A. Ocholi

710-720

DOI:

10.4314/njt.v39i3.9

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Oil palm empty fruit bunch ash stabilized laterite as a fill material for low-volume pavement

J.A. Oke, N.O. Obaji, K.J. Osinubi

721-731

DOI:

10.4314/njt.v39i3.10

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Performance of metakaolin based geopolymer concrete at elevated temperature

S. Gambo, K. Ibrahim, A. Aliyu, A.G. Ibrahim, H. Abdulsalam

732-737

DOI:

10.4314/njt.v39i3.11

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Coal mining and the environmental impact of Acid Mine Drainage(AMD): A review

T.I. Ojonimi, F. Asuke, M.A. Onimisi, C.Y. Onuh, N. Tshiongo-Makgwe

738-743

DOI:

10.4314/njt.v39i3.12

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Assessment of infrastructure maintenance practices of three airports in southern Nigeria

C.C. Okafor, M.N. Ezeoyili

744-751

DOI:

10.4314/njt.v39i3.13

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Exhaust emission characteristics of a gardener compression ignition engine fuelled with rapeseed methyl ester and fossil diesel

H.A. Dandajeh, Y.S. Sanusi, T.O. Ahmadu

752-760

DOI:

10.4314/njt.v39i3.14

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Engine performance of blends of palm kernel oil biodiesel under varying speed at constant torque

J.N. Nwakaire, O.F. Obi, C.J. Ohagwu, C.C. Anyadike, I.E. Ugwu, J.U. Ifoh

761-766

DOI:

10.4314/njt.v39i3.15

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Effect of different syngas compositions on the combustion characteristics and emission of a model combustor

Y.S. Sanusi, H.A. Dandajeh

767–775

DOI:

10.4314/njt.v39i3.16

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COP enhancement of vapour compression refrigeration system using dedicated mechanical subcooling cycle

T.S. Mogaji, A. Awolala, O.Z. Ayodeji, P.B. Mogaji, D.E. Philip

776-784

DOI:

10.4314/njt.v39i3.17

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Physicochemical properties and in vitro stability studies of green synthesized gold nanoparticles using pelargonium sidoides

U.M. Badeggi, B.A. Lawal, A.O. Akinfenwa, Y.O. Ayipo, Y. Azeh, M.Z. Dagaci

785 – 791

DOI:

10.4314/njt.v39i3.18

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Influence of temperature difference (water-cover surface) on the performance of a compact hemispherical solar still

B.Z. Adewole, A.E. Arabambi, A.A. Asere

792-799

DOI:

10.4314/njt.v39i3.19

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Acidic leaching of iron from Kaoje Goethite ore by hydrochloric acid: Kinetics modelling

K.I. Ayinla, A.A. Baba, S. Girigisu, O.S. Bamigboye, B.C. Tripathy, A.S. Ibrahim, S.O. Azeez

800-806

DOI:

10.4314/njt.v39i3.20

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Effects of varied process parameters on froth flotation efficiency: A case study of Itakpe iron ore

S. Akande, E.O. Ajaka, O.O. Alabi, T.A. Olatunji

807-815

DOI:

10.4314/njt.v39i3.21

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A new test analysis procedure for pressure drawdown test of a horizontal well in an infinite-acting reservoir

E.H. Idudje, E.S. Adewole

816-820

DOI:

10.4314/njt.v39i3.22

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Process optimization of the mechanical properties of AISI 1020 steel quenched using maize-stover ash potash solution

O.I. Ogunwede, M.S. Abolarin, A.S. Abdulrahman, O.A. Olugboji, J.B. Agboola, S.A. Lawal, L.A. Isah

821-829

DOI:

10.4314/njt.v39i3.23

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Comparative study of oil recovery improvement by sterilization process using firewood and electricity

W.A. Akpan, O.W. Obot, E.J. Awaka-Ama

830-838

DOI:

10.4314/njt.v39i3.24

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Design of 0.67hp gasoline generator pistons

B.N.G. Aliemeke, M.H. Oladeinde

839-843

DOI:

10.4314/njt.v39i3.25

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Comparative analysis of waste reduction methods for sustainable manufacturing systems using concurrent triangulation model

Q.A. Kingsley-Omoyibo

844-852

DOI:

10.4314/njt.v39i3.26

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Power energy distribution and consumption in Nigeria: The way forward for sustainable industrial and commercial development

A.O. Okpare, C. O. Okreghe

853 – 859

DOI:

10.4314/njt.v39i3.27

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Medium term electrical load forecast of Abuja Municipal Area council using artificial neural network method

E.C. Ashigwuike, A.R.A. Aluya, J.E.C. Emechebe, S.A. Benson

860-870

DOI:

10.4314/njt.v39i3.28

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Analysis and implementation of a solar tracking rack system

A.A. Okandeji, M.B. Olajide, G.O. Olasunkanmi, Z.O. Jagun

871-886

DOI:

10.4314/njt.v39i3.29

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Optimizing the control and automation of variable torque on 3-phase induction motor using programable neuro logic controller and variable frequency drive

J.N. Eneh, P.C. Ene

887--895

DOI:

10.4314/njt.v39i3.30

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Comparative analysis of selected facial recognition algorithms

J.A. Popoola, C.O. Yinka-Banjo

896-904

DOI:

10.4314/njt.v39i3.31

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Application of 2-dimensional tomography to investigate subsurface lithology in Auchi polytechnic, auchi, Edo state, nigeria

C.O. Aigbogun, D.A. Babaiwa, B.J.O. Mujakperuo

905-910

DOI:

10.4314/njt.v39i3.32

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Development and testing of a capacitive digital soil moisture sensor with printed circuit board as a probe

V. Ogwo, K.N. Ogbu, C.C. Anyadike, O.A. Nwoke, C.C. Mbajiorgu

911-917

DOI:

10.4314/njt.v39i3.33

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Assessment of the effect of cement industry effluent discharge on water quality of Ngo River in Benue, Nigeria

T.A. Aga, C.C. Anyadike, C.C. Mbajiorgu, V. Ogwo

918-924

DOI:

10.4314/njt.v39i3.34

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Aquifer characterization using vertical electrical sounding in Auchi polytechnic, Auchi, Edo State, Nigeria

D.A. Babaiwa, C.O. Aigbogun, A.T. Umoru

925-931

DOI:

10.4314/njt.v39i3.35

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Effects of microwave power and slice thickness on fiber and ash contents of dried sweet potato (Ipomoea batata)

C.O. Nwajinka, E.O. Okonjo, D.O. Amaefule, D.C. Okpala

932 – 941

DOI:

10.4314/njt.v39i3.36

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Modelling and prediction of water current using artificial neural networks: A case study of the commodore channel

O.T. Badejo, O.T. Jegede, H.O. Kayode, O.O. Durodola, S.O. Akintoye

942-952

DOI:

10.4314/njt.v39i3.37

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Water infrastructure maintainability – issues and challenges in the coastal regions of Akwa Ibom State

B.B. Okon, V.E. Okon, E. J. Udom

953-961

DOI:

10.4314/njt.v39i3.38

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