Improving the Mechanical Performance of Shell Precast Concrete Blocks for Coastal Protection Structures of Hydraulic Works
Although the use of concrete and reinforced concrete for construction has been widespread, more studies are needed on marine structures exposed directly to corrosive environments to prolong their service life. This paper proposes a new type of shell precast concrete block for coastal structures, studying a beam consisting of 15mm High-Performance Glass Fiber-Reinforced Concrete (HPGFRC) at the bottom and 45mm Traditional Concrete (TC) for the rest of the structure. Steel bar reinforcements were placed at the bottom with a concrete cover of 25mm to avoid abrupt failure. The strength classes of HPGFRC and TC were 60MPa and 30MPa respectively. A reference beam consisting of TC only was also prepared for comparison. The four-point flexural bending test results showed that the first cracking strength of the proposed beam was 20% higher, as HPGFRC performed better on tension than TC. Additionally, HPGFRC's maximum strength was 25% greater than TC's. Furthermore, HPGFRC possessed more durable characteristics such as waterproof grade, abrasion resistance, and shrinkage than TC, promising to protect the reinforcement from the aggressive marine environment and corrosion, prolonging the service life of the structure.
A.M. Neville, Properties of Concrete, 4th ed. London, UK: Pearson Education, 2002.
A. Neville and P.-C. Aïtcin, "High performance concrete-An overview," Materials and Structures, vol. 31, no. 2, pp. 111-117, Mar. 1998. https://doi.org/10.1007/BF02486473
P. N. Balaguru and S. P. Shah, Fiber-reinforced Cement Composites. New York, NY, USA: McGraw-Hill, 1992.
A. Bentur and S. Mindess, Fibre reinforced cementitious composites. London; New York: Elsevier Applied Science, 1990.
M. A. El-Reedy, Steel-Reinforced Concrete Structures : Assessment and Repair of Corrosion. Boca Raton, FL, USA: CRC Press, 2017. https://doi.org/10.1201/b22237
J. K. Wight and J. G. MacGregor, Reinforced Concrete: Mechanics and Design, 6th ed. Upper Saddle River, N.J, USA: Prentice Hall, 2011.
T. T. H. Nguyen, "Research on solutions to improve the durability of concrete - reinforced concrete of the coastal protection structure of Vietnam," Ph.D. dissertation, Thuyloi University, Hanoi, Vietnam, 2016.
A. T. Dinh and M. T. Nguyen, Current issue on corrosion of reinforced concrete structure for coastal protection in Vietnam. Vietnam: VAWR, 2012.
O. E. Gjorv, Durability Design of Concrete Structures in Severe Environments, 2nd ed. Boca Raton, FL, USA: CRC Press, 2017.
P.-C. Aı̈tcin, "Cements of yesterday and today: Concrete of tomorrow," Cement and Concrete Research, vol. 30, no. 9, pp. 1349-1359, Sep. 2000. https://doi.org/10.1016/S0008-8846(00)00365-3
A. Smyrnis, "Stability of block mats under flow conditions," M.S. thesis, Civil Engineering and Geosciences, Delft University of Technology, Netherlands, 2017.
O. A. Yamini, M. R. Kavianpour, and S. H. Mousavi, "Experimental investigation of parameters affecting the stability of articulated concrete block mattress under wave attack," Applied Ocean Research, vol. 64, pp. 184-202, Mar. 2017. https://doi.org/10.1016/j.apor.2017.03.003
M. S. Permana, B. Triatmodjo, and N. Yuwono, "Wave-Induced Pressure Distribution on Placed Perforated Revetment Block," Procedia Engineering, vol. 170, pp. 443-450, Jan. 2017. https://doi.org/10.1016/j.proeng.2017.03.071
D. T. Phan, Concrete mat technology TAC-CI for coastal protection. Vietnam: Minh Tac Company, 2012.
T. T. H. Luong, V. T. Bui, Q. V. Vu, and N. K. Pham, "Application of self-compacting concrete on bank protection works on soft ground," Journal of Scientific and Environmental Issues, no. 30, 2010.
Guidelines for Viscosity Modifying Admixtures for Concrete Guidelines for VMA. Farnham, UK: EFNARC / EFCA, 2006.
Specification and Guidelines forSelf-Compacting Concrete. Farnham, UK: EFNARC, 2002.
M. A. Memon, N. A. Memon, A. H. Memon, R. Bhanbhro, and M. H. Lashari, "Flow Assessment of Self-Compacted Concrete incorporating Fly Ash," Engineering, Technology & Applied Science Research, vol. 10, no. 2, pp. 5392-5395, Apr. 2020. https://doi.org/10.48084/etasr.3283
N. A. Memon, M. A. Memon, N. A. Lakho, F. A. Memon, M. A. Keerio, and A. N. Memon, "A Review on Self Compacting Concrete with Cementitious Materials and Fibers," Engineering, Technology & Applied Science Research, vol. 8, no. 3, pp. 2969-2974, Jun. 2018. https://doi.org/10.48084/etasr.2006
H. Okamura and M. Ouchi, "Self-Compacting Concrete," Journal of Advanced Concrete Technology, vol. 1, no. 1, pp. 5-15, 2003. https://doi.org/10.3151/jact.1.5
T. L. Ngo, "Study on the implement of fine-grain concrete with glass fiber for rehabilitation of marine structure at Giao Thuy - Nam Dinh province," M.S. thesis, Thuyloi University, Hanoi, Vietnam, 2020.
V. H. Nguyen, "Study on the use of mineral additives and fiber to produce high performance concrete for the coastal area of Nam Dinh Vu, Hai Phong province," M.S. thesis, Thuyloi University, Hanoi, Vietnam, 2018.
TCVN 9139:2012. Hydraulic Structures - Concrete and reinforced concrete Structures in coastal areas - Technical Specifications. Hanoi, Vietnam: Ministry of Construction, 2012.
MetricsAbstract Views: 147
PDF Downloads: 89
Copyright (c) 2021 Author
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.