Study on Strength and Durability of Concrete Containing Recycled Coarse Aggregate Manufactured with Various Method

Abstract:

This paper presents the results of experimental study on the effects of adhered mortar content on strengths and durability of concrete. Compressive, tensile and shear strengths, modulus of elasticity, drying shrinkage and carbonation were tested on concrete mixtures with the water cement ratio of 0.43, 0.50 and 0.60 using 3 kinds recycled coarse aggregate and a riversand. The test results of concrete indicated higher compressive, tensile amd shear strengths and higher modulus of elasticity for concrete using recycled corase aggregate with lower adhered mortar content, lower absorption and higher specific gravity. Recycled aggregate with higher adhered mortar content also showed significunt adverse effects on drying shrinkage and carbonation. In conclusion, the upper limit of adhered mortar content of coarse recycled aggregate to keep up the quality of aggregate and concrete equal to natural coarse aggregate and those concrete is considered to be 15%.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1015-1018
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1015
• Online since: July 2011
• Authors: Hong Zhu Quan
• Keywords: Adhered Mortar Content, Carbonation, Compressive Strength, Modulus of Elasticity, Recycled Coarse Aggregate, Tensile Strength

References

[1] K.Kudoh, H.Kasami, K.Shimizu: Experimental Study on the Effects of Adhered Cement Mortar with Heating and Grinding Method, Transaction of Annual Meeting of Architectural Institute of Japan A-1, 1998.9 (in Japanese)

[2] H.Kasami, et.,al.: Experimental Study on the Effects of Quality Recycled Coarse Aggregate on the Strength and Durability of Concrete, Transaction of Annual Meeting of Architectural Institute of Japan A-1, 2003.9 (in Japanese)

[3] T.Tamai, QUAN Hong-zhu, h.Kasami: On the Manufacturing Method and Quality of Recycled Coarse Aggregate, Transaction of Joint Meeting of material research, 2003.10 (in Japanese)

[4] H.Kasami, M.Abe,T, Tamai,h, QUAN Hong-zhu: On the Application of Recycled Materials for Structural Concrete, Transaction of EEC of Kogakuin University, 2005.6 (in Japanese)

[5] Hongzhu Quan, Hideo Kasami: Experimental Study on Effects of Adhered Mortar Content on Quality of Recycled Coarse Aggregate and Properties of Concrete, Proceedings of the 2nd International Conference on Waste Engineering and Management, pp.491-500, 2010.10

DOI: 10.4028/www.scientific.net/amr.194-196.1059