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mix design of recycled aggregate concrete

mix design procedure for recycled aggregate concrete - sciencedirect

mix design procedure for recycled aggregate concrete - sciencedirect

Conservation of natural resources and preservation of environment is the essence of any development. Use of recycled aggregate concrete (RAC) is one such attempt and is an answer to some of the problems in constructional engineering. The concept of using RAC is now gaining popularity and research in this direction has gained momentum. In this paper, the authors have identified the most suitable method of mix design for RAC, from amongst the available conventional methods of mix design. An influencing parameter is identified and an empirical relation is suggested to modify the influencing parameter. Mix design parameters thus obtained, enable RAC to attain the desired and designed target strength without attempting any trial mixes. The suggested modified procedure, however, demands 10% more cement which is considered quite reasonable and acceptable in view of the inferior quality of recycled aggregate.

materials | free full-text | concrete mix design for completely recycled fine aggregate by modified packing density method | html

materials | free full-text | concrete mix design for completely recycled fine aggregate by modified packing density method | html

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new mix design method for recycled concrete using mixed source concrete coarse aggregate | springerlink

new mix design method for recycled concrete using mixed source concrete coarse aggregate | springerlink

This study proposes a new mix design methodfor C30 recycled concrete using recycled aggregate crushed from different strength source concrete (SC). The dosages of cement, water, sand, and coarse recycled concrete aggregate (CRCA) are the same as the corresponding components in natural concrete, but the CRCA should be pre-wetted before casting. Its weighted mean strength has a value of 43.1MPa for two strengths of SC. Compressive and splitting tensile strength tests on recycled concrete with CRCA (100% substituting limestone aggregate) made from two mixed SC with varying strengths, have been implemented to acquire the mix design method. For investigating the influence of CRCA from two strengths of SC on recycled concrete performance, test parameters of mechanical behavior including compressive strength of SC, strength difference between two mixes of SC, and proportion of two mixed CRCA were taken into account. Test results indicate that when one of the two mixed SC strengths is similar to the target strength, two requirements have to be satisfied to achieve the target compressive strength: one of the SC has to be more than 10MPa higher than the target strength, and the proportion of the higher strength SC is larger than 75% in weight of the total CRCA. The results provide useful information for recycling multiple strength SC.

Pitarch, A.M., Reig, L., Toms, A.E., Lpez, F.J.: Effect of tiles, bricks and ceramic sanitary-ware recycled aggregates on structural concrete properties. Waste Biomass Valoriz. 10, 17791793 (2019). https://doi.org/10.1007/s12649-017-0154-0

Brs, I., Silva, P.C., Almeida, R.M.S.F., Silva, M.E.: Recycling wastes in concrete production: performance and eco-toxicity assessment. Waste Biomass Valoriz. (2018). https://doi.org/10.1007/s12649-018-0382-y

Ding, X., Qi, J., Fang, W., Chen, M., Chen, Z.: Improvement on properties of recycled concrete with coarse ceramic vase aggregates using kh-550 surface treating technology. Eur. J. Environ. Civ. Eng. 24, 116 (2017). https://doi.org/10.1080/19648189.2017.1363664

Fathifazl, G., Abbas, A., Razaqpur, A.G., Isgor, O.B., Fournier, B., Foo, S.: New mixture proportioning method for concrete made with coarse recycled concrete aggregate. J. Mater. Civ. Eng. 21, 601611 (2009)

Sagoe-Crentsil, K.K., Brown, T., Taylor, A.H.: Performance of concrete made with commercially produced coarse recycled concrete aggregate. Cem. Concr. Res. 31, 707712 (2001). https://doi.org/10.1016/S0008-8846(00)00476-2

Pedro, D., de Brito, J., Evangelista, L.: Structural concrete with simultaneous incorporation of fine and coarse recycled concrete aggregates: mechanical, durability and long-term properties. Constr. Build. Mater. 154, 294309 (2017). https://doi.org/10.1016/j.conbuildmat.2017.07.215

Gneyisi, E., Gesoglu, M., Algn, Z., Yazc, H.: Rheological and fresh properties of self-compacting concretes containing coarse and fine recycled concrete aggregates. Constr. Build. Mater. 113, 622630 (2016). https://doi.org/10.1016/j.conbuildmat.2016.03.073

Agrela, F., Beltran, M.G., Cabrera, M., Lpez, M., Ayuso, J.: Properties of recycled concrete manufacturing with all-in recycled aggregates and processed biomass bottom ash. Waste Biomass Valoriz. (2017). https://doi.org/10.1007/s12649-017-9880-6

Knaack, A.M., Kurama, Y.C.: Design of normal strength concrete mixtures with recycled concrete aggregates. American Society of Civil Engineers Structures Congress 2011Las Vegas, Nevada, United States (April 1416, 2011). https://doi.org/10.1061/41171(401)267

Fonseca, N., De Brito, J., Evangelista, L.: The influence of curing conditions on the mechanical performance of concrete made with recycled concrete waste. Cem. Concr. Compos. 33(6), 637643 (2011). https://doi.org/10.1016/j.cemconcomp.2011.04.002

Coudray, C., Amant, V., Cantegrit, L., Le Bocq, A., Thery, F., Denot, A.: Influence of crushing conditions on recycled concrete aggregates (RCA) leaching behaviour. Waste Biomass Valoriz. (2017). https://doi.org/10.1007/s12649-017-9868-2

De Juan, M.S., Gutirrez, P.A.: Study on the influence of attached mortar content on the properties of recycled concrete aggregate. Constr. Build. Mater. 23, 872877 (2009). https://doi.org/10.1016/j.conbuildmat.2008.04.012

Padmini, A.K., Ramamurthy, K., Mathews, M.S.: Influence of parent concrete on the properties of recycled aggregate concrete. Constr. Build. Mater. 23, 829836 (2009). https://doi.org/10.1016/j.conbuildmat.2008.03.006

Nagataki, S., Gokce, A., Saeki, T., Hisada, M.: Assessment of recycling process induced damage sensitivity of recycled concrete aggregates. Cem. Concr. Res. 34, 965971 (2004). https://doi.org/10.1016/j.cemconres.2003.11.008

Letelier, V., Tarela, E., Osses, R., Crdenas, J.P., Moriconi, G.: Mechanical properties of concrete with recycled aggregates and waste glass. Struct. Concr. 18, 4053 (2017). https://doi.org/10.1002/suco.201500143

Milievi, I., tirmer, N., Bjegovi, D.: Relation between the compressive strength and modulus of elasticity of concrete with crushed brick and roof tile aggregates. Struct. Concr. 18, 366375 (2017). https://doi.org/10.1002/suco.201500207

Sheen, Y.N., Wang, H.Y., Juang, Y.P., Le, D.H.: Assessment on the engineering properties of ready-mixed concrete using recycled aggregates. Constr. Build. Mater. 45, 298305 (2013). https://doi.org/10.1016/j.conbuildmat.2013.03.072

Pedro, D., De Brito, J., Evangelista, L.: Influence of the use of recycled concrete aggregates from different sources on structural concrete. Constr. Build. Mater. 71, 141151 (2014). https://doi.org/10.1016/j.conbuildmat.2014.08.030

Tabsh, S.W., Abdelfatah, A.S.: Influence of recycled concrete aggregates on strength properties of concrete. Constr. Build. Mater. 23, 11631167 (2009). https://doi.org/10.1016/j.conbuildmat.2008.06.007

Duan, Z.H., Poon, C.S.: Properties of recycled aggregate concrete made with recycled aggregates with different amounts of old adhered mortars. Mater. Des. 58, 1929 (2014). https://doi.org/10.1016/j.matdes.2014.01.044

McGinnis, M.J., Davis, M., de la Rosa, A., Weldon, B.D., Kurama, Y.C.: Strength and stiffness of concrete with recycled concrete aggregates. Constr. Build. Mater. 154, 258269 (2017). https://doi.org/10.1016/j.conbuildmat.2017.07.015

Kou, S.C., Poon, C.S.: Effect of the quality of parent concrete on the properties of high performance recycled aggregate concrete. Constr. Build. Mater. 77, 501508 (2015). https://doi.org/10.1016/j.conbuildmat.2014.12.035

Gonzalezcorominas, A., Etxeberria, M.: Effects of using recycled concrete aggregates on the shrinkage of high-performance concrete. Constr. Build. Mater. 115, 3241 (2016). https://doi.org/10.1016/j.conbuildmat.2016.04.031

Liu, K., Yan, J., Hu, Q., Sun, Y., Zou, C.: Effects of parent concrete and mixing method on the resistance to freezing and thawing of air-entrained recycled aggregate concrete. Constr. Build. Mater. 106, 264273 (2016). https://doi.org/10.1016/j.conbuildmat.2015.12.074

Etxeberria, M., Vzquez, E., Mar, A., Barra, M.: Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete. Cem. Concr. Res. 37, 735742 (2007). https://doi.org/10.1016/j.cemconres.2007.02.002

Sousa RM, Sousa H, Faria JA.: Demolition of works and construction sustainability. Some case studies (in Portuguese). In: Proceedings of the national congress on constructionconstruction 2004: rethinking construction, Engineering Faculty of Porto University, December 2004.

Santos A, de Brito J.: Building deconstruction in Portugal: a case study. In: Proceedings of Portugal SB07 Conferencesustainable construction, materials and practiceschallenge of the industry for the new millennium, 2007. p. 10591066.

Silva, R.V., De Brito, J., Dhir, R.K.: Properties and composition of recycled aggregates from construction and demolition waste suitable for concrete production. Constr. Build. Mater. 65, 201217 (2014). https://doi.org/10.1016/j.conbuildmat.2014.04.117

This study was supported by the financial support from the National Intensive Research Project of China (No. 2018YFD1100402-05)andthe National Natural Science Foundation of China(No. 51908122). The financial support is gratefully appreciated.

Ding, X., Hao, J., Chen, Z. et al. New Mix Design Method for Recycled Concrete Using Mixed Source Concrete Coarse Aggregate. Waste Biomass Valor 11, 54315443 (2020). https://doi.org/10.1007/s12649-020-01073-7

mix design and recycled aggregates effects on the concretes properties | springerlink

mix design and recycled aggregates effects on the concretes properties | springerlink

An experimental program was carried out to study the properties of concretes with C25/30 and C35/45 resistance classes designed using natural aggregates and recycled ones provided from construction and demolition waste (C&DW). Eight mixtures were prepared with different incorporation ratios of fine and coarse recycled aggregates. The physical and mechanical characteristics were measured and their evolution regarding to the paste volume, the equivalent replacement ratio and the quality of the interface between recycled aggregates and new paste has been investigated. Scanning Electron Microscopic observations have revealed a good quality of the interface. It was found that water porosity is more dependent on the equivalent replacement ratio than on the volume of the new paste. The same conclusions are reported for the electrical resistivity which has been related to the water porosity. Based on experimental results, it has been found that the Archies law predicts the electrical resistivity as a function of water porosity for all type of concrete. The effect of mix design parameters and aggregates properties on the compressive strength has been investigated and a model is proposed on the basis of Frets expression through experimental results and data points available in the literature. The modified expression is related to the aggregate fragmentation resistance expressed by the Los Angeles coefficient (LA). The Frets coefficient can be taken equal to 6.4 if LA20% and it is inversely proportional to LA otherwise. With regard to the splitting tensile strength, it can be correlated to the electrical resistivity through a power law relationship. The elastic modulus, the peak and the ultimate strains are than rewritten as functions of the compressive strength and the replacement ratio to model the full stressstrain curve under uniaxial compression. Furthermore, the validity of using EC2 to model the evolution of all mechanical properties with age is ensured.

Rodrguez-Robles D, Moran-del Pozo JM, Garcia-Gonzalez J, Guerra-Romero MI, Juan-Valds A (2015) Effect of mixed recycled aggregates on mechanical properties of recycled concrete. Mag Concr Res 67(5):247256

Boukli Hacene SMA, Ghomari F, Schoefs F, Khelidj A (2009) Etude exprimentale et statistique de linfluence de laffaissement et de lair occlus sur la rsistance la compression des btons. Leban Sci J 10:81100

Tuyan M, Mardani-Aghabaglou A, Ramyar K (2014) Freeze-thaw resistance, mechanical and transport properties of self-consolidating concrete incorporating coarse recycled concrete aggregate. Mater Des 53:983991

Ignjatovic IS, Marinkovi SB, Miskovic ZM, Savi A (2013) Flexural behavior of reinforced recycled aggregate concrete beams under short-term loading. Mater Struct 46:10451059. doi:10.1617/s11527-012-9952-9

De Oliveira MB, Vazquez E (1996) The influence of retained moisture in aggregates from recycling on the properties of new hardened concrete. Waste Management Bulk Inert Waste: an Opportunity for Use 16(13):113117

Omary, S., Ghorbel, E., Wardeh, G. et al. Mix Design and Recycled Aggregates Effects on the Concretes Properties. Int J Civ Eng 16, 973992 (2018). https://doi.org/10.1007/s40999-017-0247-y

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