Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32732
Residual Modulus of Elasticity of Self-Compacting Concrete Incorporated Unprocessed Waste Fly Ash after Expose to the Elevated Temperature

Authors: Mohammed Abed, Rita Nemes, Salem Nehme


The present study experimentally investigated the impact of incorporating unprocessed waste fly ash (UWFA) on the residual mechanical properties of self-compacting concrete (SCC) after exposure to elevated temperature. Three mixtures of SCC have been produced by replacing the cement mass by 0%, 15% and 30% of UWFA. Generally, the fire resistance of SCC has been enhanced by replacing the cement up to 15% of UWFA, especially in case of residual modulus of elasticity which considers more sensitive than other mechanical properties at elevated temperature. However, a strong linear relationship has been observed between the residual flexural strength and modulus of elasticity, where both of them affected significantly by the cracks appearance and propagation as a result of elevated temperature. Sustainable products could be produced by incorporating unprocessed waste powder materials in the production of concrete, where the waste materials, CO2 emissions, and the energy needed for processing are reduced.

Keywords: Self-compacting high-performance concrete, unprocessed waste fly ash, fire resistance, residual modulus of elasticity.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 650


[1] Poon Chi-Sun, Azhar Salman, Anson Mike, Wong Yuk-Lung, Comparison of the strength and durability performance of normal- and high-strength pozzolanic concretes at elevated temperatures. Cement and Concrete Research, 2001. 31(9): p. 1291-1300.
[2] Tang W.C., Lo T.Y., Mechanical and fracture properties of normal-and high-strength concretes with fly ash after exposure to high temperatures. Magazine of Concrete Research, 2009. 61(5): p. 323-330.
[3] Hanaa F., Albert N., Sébastien R., Self-consolidating concrete subjected to high temperature: Mechanical and physicochemical properties. Cement and Concrete Research, 2009. 39(12): p. 1230-1238.
[4] Bui Ngoc Kien, Satomi Tomoaki, Takahashi Hiroshi, Effect of mineral admixtures on properties of recycled aggregate concrete at high temperature. Construction and Building Materials, 2018. 184: p. 361-373.
[5] Li Qingtao, Li Zhuguo, Yuan Guanglin, Effects of elevated temperatures on properties of concrete containing ground granulated blast furnace slag as cementitious material. Construction and Building Materials, 2012. 35: p. 687-692.
[6] Hamood Alaa, Khatib Jamal M., Williams Craig, The effectiveness of using Raw Sewage Sludge (RSS) as a water replacement in cement mortar mixes containing Unprocessed Fly Ash (u-FA). Construction and Building Materials, 2017. 147: p. 27-34.
[7] Poon C. S., Qiao X. C., Lin Z. S., Pozzolanic properties of reject fly ash in blended cement pastes. Cement and Concrete Research, 2003. 33(11): p. 1857-1865.
[8] Snelson David G., Kinuthia John M., Resistance of mortar containing unprocessed pulverised fuel ash (PFA) to sulphate attack. Cement and Concrete Composites, 2010a. 32(7): p. 523-531.
[9] Snelson David G., Kinuthia John M., Characterisation of an unprocessed landfill ash for application in concrete. Journal of Environmental Management, 2010b. 91(11): p. 2117-2125.
[10] EN 197-1: Cement - Part 1: Composition, specifications and conformity criteria for common cements 2000.
[11] EN 196-2: Cement testing methods. Part 2: Chemical analysis of cement 2013.
[12] EN 525-12: Chemical analysis of cement. Part 12: Determination of free lime content 2014.
[13] EN 12620:2002+A1: Aggregates for concrete 2008.
[14] Mucsi Gábor, Csőke Barnabás, Power Plant Fly Ash as a Valuable Raw Material. Geosciences and Engineering, 2012. 1(1): p. 223–236.
[15] Mohammed A. and Rita N., Characteristics of cement pastes incorporating different amounts of unprocessed waste fly ash (UWFA). 12th fib International PhD Symposium in Civil Engineering, Prague, 2018. p. 11-17.
[16] Mohammed A. and Rita N., Long-term durability of self-compacting high-performance concrete produced with waste materials. Construction and Building Materials, 2019. 212: p. 350-361.
[17] EN 1008: Mixing water for Concrete-Specification for sampling, testing and assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water for concrete 2002
[18] Hlavička Viktor, Éva Lublóy, Bond after fire. Construction and Building Materials, 2017. 132: p. 210-218.
[19] EN 1991-1-2: Eurocode 1: Actions on structures – Part 1–2: General actions – Actions on structures exposed to fire 2005.
[20] EN 12390-3: Testing hardened concrete. Part 3: Compressive strength of test specimens 2009.
[21] EN 12390-5: Testing hardened concrete. Part 5: Flexural strength of test specimens 2009.
[22] EN 14146: Natural stone test methods. Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency) 2004.
[23] EFNARC: Specifications and guidlines for self-compacting concrete, English ed. European federation for specialist cinstruction chemicals &concrete systems 2005.
[24] Mohammed A. and Rita N., Mechanical Properties of Recycled Aggregate Self-Compacting High Strength Concrete Utilizing Waste Fly Ash, Cellular Concrete and Perlite Powders. Periodica Polytechnica Civil Engineering, 2019. 63(1), 266-277.
[25] Lublóy É, Kopecskó K., Balázs G. L., Restás Á., Szilágyi, I. M., Improved fire resistance by using Portland-puzzolana of Portland fly ash cements. J. Therm. Anal. Calorim., 2017. 1: p. 1-12.
[26] Crook D. N., Murray M. J., Regain of strength after firing of concrete. Magazine of Concrete Research, 1970. 22(72): p. 149-154.