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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29207

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Treatment of Recycled Concrete Aggregates by Si-Based Polymers
The recycling of concrete, bricks and masonry rubble as concrete aggregates is an important way to contribute to a sustainable material flow. However, there are still various uncertainties limiting the widespread use of Recycled Concrete Aggregates (RCA). The fluctuations in the composition of grade recycled aggregates and their influence on the properties of fresh and hardened concrete are of particular concern regarding the use of RCA. Most of problems occurring while using recycled concrete aggregates as aggregates are due to higher porosity and hence higher water absorption, lower mechanical strengths, residual impurities on the surface of the RCA forming weaker bond between cement paste and aggregate. So, the reuse of RCA is still limited. Efficient polymer based treatment is proposed in order to reuse RCA easier. The silicon-based polymer treatments of RCA were carried out and were compared. This kind of treatment can improve the properties of RCA such as the rate of water absorption on treated RCA is significantly reduced.
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[1] H.J. Chen, T. Yen, K.H. Chen, "Use of building rubbles as recycled aggregates", Cem Concr Res, 33, 2003, pp. 125-132
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[12] T. Mukai, H. Koizumi "Study on reuse of waste concrete for aggregate of concrete", Paper Presented at a Seminar on "Energy and Resources Conservation in Concrete Technology", Japan-US Co-operative Science Prog, San Francisco,1979
[13] N. Otsuki, S.I Miyazato., W.Yodsudjai "Influence of Recycled Aggregate on Interfacial Transition Zone, Strength, Chloride Penetration and Carbonation of Concrete". J Mater Civil Eng, 15, 2003, pp 443-451
[14] D. Kong, T. Lei, J. Zheng, C. Ma, Jun Jiang, J. Jiang, "Effect and mechanism of surface-coating pozzalanics materials around aggregate on properties and ITZ microstructure of recycled aggregate concrete". Constr. and Build. Mat., 24, 2010, pp 701-708
[15] V.W.Y Tam,., C.M. Tam, Y. Wang, "Optimization on proportion for recycled aggregate in concrete using two-stage mixing approach". Constr and Build Mat., 21, 2007, pp 1928-1939
[16] S.C Kou., C.S Poon., Etxeberria M., "Influence of recycled aggregates on long term mechanical properties and pore size distribution of concrete". Cem Concr Comp, 33, 2011, pp 286.
[17] V. Spaeth, JP Lecomte, MP Delplancke, "Development of cement materials by incorporation WR additives", RBM, Aedificatio publishers, 16, 2010, pp 315-324
[18] Zhao T, Wittmann F H., Jiang R, Li W, "Application of silane-based compounds for the production of integral water repellent concrete", HVI, 6th International conference on WR treatment of building materials, 2011, pp 137-144
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