Recycled Aggregate Self-curing High-strength Concrete
The use of recycled aggregates from demolished constructions as coarse aggregates for concrete becomes a need to reduce the negative effects on the environment. Internal curing is a technique that can be used to provide additional moisture in concrete for more effective hydration of cement to reduce the water evaporation from concrete, increase the water retention capacity of concrete compared to the conventionally cured concrete. High strength concrete as a special concrete type has a high strength with extra properties compared to conventional concrete. In this research, the combination of previous three concrete types to obtain self-curing high-strength concrete cast using coarse recycled aggregates is studied. The effect of varying water reducer admixture and curing agent dosages on both the fresh and hardened concrete properties is studied. The fresh properties are discussed in terms of slump values. The hardened concrete properties are discussed in terms of compressive, splitting tensile, flexure and bond strengths. The obtained results show that, the using of water reducer admixture enhances the main fresh and hardened properties of self-curing high-strength concrete cast using recycled aggregate. Also, using the suggested chemical curing agent increased the strength compared to conventional concrete without curing.
Sivakumar, N. and Manikandan, R. Experimental Investigation on Flexural Behavior of High Strength Concrete Beam by Using STAAD pro. Concrete Model. International Journal of Science Research (IJSR), 2 (2013).
Australia, C. C. A.. Use of Recycled Aggregates in Construction. Australia, 2008.
Kuroda, Y. and Hashida, H. A Closed-Loop Concrete System on a Construction Site. In Proceeding of international symposium on sustainable development of cement, concrete and concrete structures (Toronto, Canada 2005), 371-388.
Kasai, Y. Recent Trends in Recycling of Concrete Waste and Use of Recycled Aggregate Concrete. ACI text (SP-219-2) (2004), 11-34.
Dosho, Y. Application of Recycled Aggregate Concrete for Structural Concrete: A Recycling System for Concrete Waste. In International Symposium on Sustainable Development of Cement, concrete and concrete structures (Toronto, Canada 2005), 459-478.
Pamnani, N. J., Verma, A. K., and Bhatt, D. R. Comparison of Compressive Strength of Medium Strength Self Compacted Concrete by Different Curing Techniques. International Journal of Engineering Trends and Technology (IJETT), 4, 5 (2013).
Troli, R., Borsoi, A., Collepardi, S., Fazio, G., Collepardi, M., and Monosi, S. Self-Compacting / Curing / Compressing Concrete. In 6th International Congress, Global Construction, Ultimate Concrete Opportunities (Dundee, UK 2005).
EL-Dieb, A. S. and Okba, S. H. Performance of Self Curing Concrete. Ph.D. Thesis, Ain Shams University, Cairo, Egypt, Cairo, Egypt, 2005.
Safan, M. A., Bashandy, A. A., Afify, M. R., and AboZed, A. M. Influence of Curing Conditions on The Behavior of Reinforced Self-Curing Slabs Containing Super Absorbent Polymers. In The 9th Alexandria International Conference on Structural and Geotechnical Engineering (Alexandrya 2016), Alexandrya University, Alexandrya, Egypt, 29.
Bashandy, A. A., Meleka, N. N., and Hamad, M. M. Comparative Study on the Using of PEG and PAM as Curing Agents for Self-Curing Concrete. Challenge Journal of Concrete Research Letters, 8, 1 (2017), 1-10.
Bashandy, A. A. Self-curing Concrete under Sulfate Attack. Archives of Civil Engineering, 62, 2 (2016).
Emam, E. A. Durability of Self-Curing Concrete. M. Sc. at Faculty of Engineering, Menoufia University, Menoufia, Egypt, 2012.
Dhir, R.K., Hewlett, P.C., and Dyer, T.D. Durability of Self-cured Concrete. Cement and Concrete Research, 25, 6 (1995), 1153-1158.
Vyawahare, M. R. and Patil, A. A. Comparative study on Durability of Self cured SCC and Normally cured SCC. International Journal of Scientific Research Engineering & Technology (IJSRET), 3, 8 (November 2014), 1201-1208.
Bashandy, A. A. Performance of Self-curing Concrete at Elevated Temperatures. Indian Journal of Engineering & Materials Sciences, 22 (2015), 93-104.
Bashandy, A. A., Safaan, M. A., and Ellyien, M. M. Feasibility of using Recycled-Aggregates in Self-Curing Concrete. In The 9th Alexandria International Conference on Structural and Geotechnical Engineering (Alexandria 2016), Faculty of Engineering, Alexandria University, Alexandria, Egypt.
Subramanian, K. B., Siva, A., Swaminathan, S., and Ajin, A. M. G. Development of High Strength Self Curing Concrete Using Super Absorbing Polymer. International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering, 9, 12 (2015).
Zhutovsky, S. and Kovler, K. Effect of Internal Curing on Durability-related Properties of High Performance Concrete. Cement and Concrete Research, 42 (2012), 20-26.
Abdur-Rashid, M. and Abul-Mansur, M. Considerations in Producing High Strength Concrete. Journal of Civil Engineering, 37, 1 (2009), 53-63.
E.S.S.4756-1/2009. Portland Cement, Ordinary and Rapid Hardening. Egyptian Standard Specification E.S.S. 4756-1, Ministry of Industry, Cairo, Egypt, 2009.
E.C.P.203/2007. Egyptian Code of Practice: Design and Construction for Reinforced Concrete Structures. Cairo, Egypt, 2007.
E.S.S.1109/2008. Aggregates for Concrete. Ministry of Industry, Cairo, Egypt, 2008.
ASTM.C-33. Aggregates. Philadelphia, USA, 2003.
E.S.S.262/2011. Egyptian Standard Specification for Steel Bars. Ministry of Industry, Cairo, Egypt, 2011.
ASTM.C-494. Chemical Admixtures for Concrete. Philadelphia, USA. 2015.
Burg, R. G. and Ost, B. W. Engineering Properties of Commercially Available High-strength Concrete. Portland Cement Associations (1994).
Copyright (c) 2017 Alaa Ali Bashandy, mahmoud hamdy abd elrahman
This work is licensed under a Creative Commons Attribution 4.0 International License.