Charles K. Nmai

511 total citations
22 papers, 409 citations indexed

About

Charles K. Nmai is a scholar working on Civil and Structural Engineering, Building and Construction and Materials Chemistry. According to data from OpenAlex, Charles K. Nmai has authored 22 papers receiving a total of 409 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Civil and Structural Engineering, 14 papers in Building and Construction and 4 papers in Materials Chemistry. Recurrent topics in Charles K. Nmai's work include Innovations in Concrete and Construction Materials (9 papers), Concrete and Cement Materials Research (9 papers) and Innovative concrete reinforcement materials (7 papers). Charles K. Nmai is often cited by papers focused on Innovations in Concrete and Construction Materials (9 papers), Concrete and Cement Materials Research (9 papers) and Innovative concrete reinforcement materials (7 papers). Charles K. Nmai collaborates with scholars based in United States, Switzerland and Italy. Charles K. Nmai's co-authors include David Darwin, Emmanuel K. Attiogbe, David B. McDonald, Joseph Daczko, Mark Bowman, Luigi Coppola and Robert J. Flatt and has published in prestigious journals such as Cement and Concrete Research, Cement and Concrete Composites and Journal of Structural Engineering.

In The Last Decade

Charles K. Nmai

17 papers receiving 353 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Charles K. Nmai United States	8	380	142	110	36	25	22	409
Alexander M. Vaysburd United States	13	530 1.4×	110 0.8×	190 1.7×	40 1.1×	12 0.5×	37	575
Peter Emmons United States	12	421 1.1×	122 0.9×	172 1.6×	38 1.1×	12 0.5×	30	467
Peter Vagn Nygaard Switzerland	8	398 1.0×	165 1.2×	81 0.7×	77 2.1×	9 0.4×	9	425
Ho-Seop Jung South Korea	6	327 0.9×	184 1.3×	52 0.5×	31 0.9×	20 0.8×	15	348
Haiwei Zhu China	9	312 0.8×	116 0.8×	111 1.0×	29 0.8×	11 0.4×	14	350
Zhihong Fan China	9	331 0.9×	113 0.8×	57 0.5×	69 1.9×	8 0.3×	19	365
O.A. Kayyali Kuwait	10	402 1.1×	166 1.2×	75 0.7×	70 1.9×	13 0.5×	17	418
A I Al-Mana Saudi Arabia	12	431 1.1×	257 1.8×	118 1.1×	48 1.3×	28 1.1×	23	496
George Sergi United Kingdom	13	498 1.3×	261 1.8×	36 0.3×	141 3.9×	31 1.2×	27	525
Yasutaka Sagawa Japan	10	307 0.8×	90 0.6×	111 1.0×	24 0.7×	6 0.2×	49	329

Countries citing papers authored by Charles K. Nmai

Since Specialization

Citations

This map shows the geographic impact of Charles K. Nmai's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Charles K. Nmai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Charles K. Nmai more than expected).

Fields of papers citing papers by Charles K. Nmai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Charles K. Nmai. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Charles K. Nmai. The network helps show where Charles K. Nmai may publish in the future.

Co-authorship network of co-authors of Charles K. Nmai

This figure shows the co-authorship network connecting the top 25 collaborators of Charles K. Nmai. A scholar is included among the top collaborators of Charles K. Nmai based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Charles K. Nmai. Charles K. Nmai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Nmai, Charles K., et al.. (2025). Innovative Admixture Technology Facilitates Rapid Repair of Concrete Pavements. Proceedings of the International Conference on Concrete Pavements.

Nmai, Charles K., et al.. (2022). Use of Innovative Admixtures in Precast/Prestressed Concrete.

Coppola, Luigi, Robert J. Flatt, & Charles K. Nmai. (2022). Editorial for the special issue on “Chemical admixtures and recent advances in Concrete Technology and Sustainability”. Cement and Concrete Research. 159. 106898–106898.

Nmai, Charles K., et al.. (2015). Microspheres-Based Admixture for Free-Thaw Durability of Concrete. 2 indexed citations

Attiogbe, Emmanuel K., et al.. (2015). Freezing-and-Thawing Behavior of Cementitious Systems with New Polymeric Microsphere-Based Admixture. ACI Materials Journal. 112(6). 10 indexed citations

Nmai, Charles K., et al.. (2014). Crack-Reducing Admixture. ACI Concrete International. 36(1). 53–57. 2 indexed citations

Nmai, Charles K. & Joseph Daczko. (2012). Unique Applications of an Innovative Workability-Retaining Admixture. 1 indexed citations

Nmai, Charles K.. (2003). Multi-functional organic corrosion inhibitor. Cement and Concrete Composites. 26(3). 199–207. 112 indexed citations

Nmai, Charles K., et al.. (2001). Unique Applications of a Cellulose-Based Anti-Washout Admixture. ACI Concrete International. 23(4). 24–30. 1 indexed citations

10.

Nmai, Charles K., et al.. (1998). Shrinkage-Reducing Admixtures. ACI Concrete International. 20(4). 31–37. 69 indexed citations

11.

Nmai, Charles K., et al.. (1998). A History of Mid-Range Water-Reducing Admixtures. ACI Concrete International. 20(4). 45–50. 1 indexed citations

12.

Nmai, Charles K., et al.. (1994). CORROSION EVALUATION OF A SODIUM THIOCYANATE-BASED ADMIXTURE. ACI Concrete International. 16(4). 22–25. 10 indexed citations

13.

Attiogbe, Emmanuel K. & Charles K. Nmai. (1992). Air-void system parameters and freeze-thaw durability of concrete containing superplasticizers. ACI Concrete International. 14(7). 57–61. 8 indexed citations

14.

Nmai, Charles K. & Emmanuel K. Attiogbe. (1992). Effect of Chemical and Mineral Admixtures on the Corrosion of Steel in Concrete. 1–10.

15.

Nmai, Charles K., et al.. (1991). A NOVEL APPROACH TO DEVELOPING HIGH-STRENGTH CONCRETE. ACI Concrete International. 13(5). 25–29. 4 indexed citations

16.

Nmai, Charles K., et al.. (1989). Sodium Thiocyanate and Corrosion of Steel in Concrete and Mortar. ACI Concrete International. 11(11). 59–67. 1 indexed citations

17.

Nmai, Charles K. & Mark Bowman. (1987). Crack Gages for Detecting Fatigue Crack Initiation. Journal of Structural Engineering. 113(7). 1487–1500. 1 indexed citations

18.

Nmai, Charles K. & David Darwin. (1986). Lightly Reinforced Concrete Beams under Cyclic Load. ACI Journal Proceedings. 83(5). 6 indexed citations

19.

Darwin, David & Charles K. Nmai. (1986). Energy Dissipation in RC Beams Under Cyclic Load. Journal of Structural Engineering. 112(8). 1829–1846. 96 indexed citations

20.

Nmai, Charles K. & David Darwin. (1984). Cyclic Behavior of Lightly Reinforced Concrete Beams. KU ScholarWorks (The University of Kansas). 11 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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