Вы здесь

Funct. Mater. 2017; 24 (2): 328-334.

doi:https://doi.org/10.15407/fm24.02.328

Experimental study of the salt solution erosing influence on strength of concrete with recycled coarse aggregate

Liu Faming1, Zhao Lisha2, Yang Bin1

1 School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China
2 School of Mathematics and Statistics, Suzhou University, Suzhou 234000, China

Abstract: 

There are carried out the experimental study of the loss of the recycled concrete’s strength depending on the recycled coarse aggregate substitution ratio, quantity of the fly ash and age of the concrete through investigation of the concrete’s compressive strength. It is shown that compared with natural gravel, the recycled coarse aggregates accumulate damages at crushing process and have a lot of micro cracks. In addition, the surface of gravel is wrapped in porous adhesive mortar which provides corrosion resistance of concrete deterioration. With the amount of recycled coarse aggregate increasing, the compressive strength of recycled concrete decreases. The addition of fly ash, which creates a compaction effect, helps improve the erosion resistance of recycled concrete. It is shown that positive effect of aging of recycled concrete is significantly higher than negative effect of salt solution erosion, so with time the strength of recycled concrete is increased.

Keywords: 
Salt solution, recycled coarse aggregate, coarse aggregate substitution rate, compressive strength.
References: 

1. Jianzhuang Xiao, Recycled Concrete, Beijing: China Architecture & Building Press, 2008.

2. Qiuyi Li, Yunxia Li, Chongji Zhu, Influence of particle shaping on performance of Recycled fine aggregate, New Building Materials, vol.1, pp.17-19, 2006.

3. Yibo Yang, Song Liang, Haihong Mo, et al, Research on production of recycled total-fine aggregate and its influence on concrete performance, Journal of Functional Materials, vol.4, pp. 4157-4163, 2016.

4. Eguchi K, TeranishiK, Narikawa M, Study on mechanism of drying shrinkage and water loss of recycled aggregate concrete, Journal of Structural and Construction Engineering, pp.17-19, 2003.

5. Xiaofei Wang, Influence of quality and substitution rate of recycled coarse aggregate on mechanical properties of recycled concrete Qingdao Technological University master thesis, pp. 29-38, 2015.

6. Ting Li, Influence of defects in recycled aggregate on mechanical properties of recycled aggregate concrete, Beijing Jiaotong University master thesis, pp. 65-87,2013.

7. Xiuliang Huang, Experimental study on durability performances of recycled aggregate concrete, Hefei University of Technology master thesis, pp. 1-5, 2013.

8. Xiufang Zhang, Gengxin He, Xiaolong Zhao, Experimental research on compounding concrete with recycled aggregates, Construction Technology, vol.40, pp.60-63.

9. Xiaoxiao Wang, Xiangdong Shen, Effects of mineral admixture on the physical property of lightweight aggregate concrete, China Water & Power Press, pp.121 -135,2015.

10. Jun Zhao, Genwei Wang, Test and study on bonding properties of recycled aggregate concrete with aggregate replacement rate, Sichuan Building Science, vol.40, pp.225-228.

Current number: