ANALYZING THE EFFECT OF MICRO RUBBER, MICRO SIO2, AND NANO SIO2 IN MICROCRACKS IN SELF-CONSOLIDATING CONCRETE (SEM OBSERVATION)

Authors

  • Ehsan Adili Velayat University, Department of Civil Engineerning,Iranshahr, Iran
  • Moein Riginejad Hatef University,Zahedan, Iran

DOI:

https://doi.org/10.14311/CEJ.2021.01.0022

Keywords:

Self-consolidating concrete, Micro rubber waste, Microcrack, SEM

Abstract

The present study is an attempt to analyze the effect of micro rubber waste in self- consolidating concrete (SCC) and to compare the concrete containing SCC with conventional additives such as micro SiO2 and nano SiO2. The use of rubber waste can be substantially important from the environmental point of view. Hence, concrete specimens containing 1, 3 and 5% micro rubber waste were made. Moreover, specimens containing 1, 3 and 5% nano SiO2 and 4, 8 and 12% micro SiO2 were prepared to compare their behaviour and microstructure with each other and with the witness specimens. The effect of the other parameters such as the specimen age and the w/c ratio on the microstructure of concrete containing rubber waste was also studied. Thereafter, the specimens were imaged using a scanning electron microscope (SEM) to observe and compare the microcracks in the concrete and secondary electron beam (SE) was used to obtain their images. The results of the microstructural consideration of different specimens showed that 1% of micro rubber waste can improve the behaviour of self-consolidating concrete, but the concrete microstructure strength and quality decline with an increase in its amount.

References

H. Okamura, M. Ouchi. “Self-consolidating concrete, Development, present use and future” 1st International RILEM Symposium on Self-Consolidating Concrete (1999).

H. Okamura, M. Ouchi. “Self-consolidating concrete” J. Adv. Concr. Technol., 1 (2003), pp. 5-15

H. Okamura, M. Ouchi. “Application of self-consolidating concrete in Japan” 3rd International RILEM Symposium on Self-Consolidating Concrete (2003).

M. Ouchi. “Self-compactability of fresh concrete” 1st International RILEM Symposium on Design, Performance and Use of Self-Consolidating Concrete (2005).

American Concrete Institute ACI 237R-07 Self-consolidating csoncrete ACI Manual of Concrete Practice, Part 1, Farmington Hills, Michigan (2007).

N. Makul. “Combined use of untreated-waste rice husk ash and foundry sand waste in high-performance self-consolidating concrete”. Results in Materials. 1 (2019) 10014.

Adili, E; Sohrabi, M. R; Nehi, H. M “Prediction of microcracks in concrete using fuzzy systems” journal of intelligent & fuzzy system. Vol 27. No 3. pp 1161-1168, 2014.

Diamond, S. and Huang, J. “The ITZ in concrete- a different view based on image analysis and SEM observation” Cement and Concrete Composites. 23 (2001) 179-188.

Feiteira, J; Tsangouri, E; Gruyaert, E; Lors, C; Louis, G and Debelie, N “Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loading” Materials & Design, Vol 115, 5 February 2017, Pages 238-246.

A. Santamaría , A. Orbe, M.M. Losañez, M. Skaf, V. Ortega-Lopez, Javier J. González. “Self-compacting concrete incorporating electric arc-furnace steelmaking slag as aggregate”. Materials and Design 115 (2017) 179–193.

Md. Safiuddin, M. Yakhlaf and K.A Soudki. “Key mechanical properties and microstructure of carbon fibre reinforced self-consolidating concrete”. Construction and Building Materials. Vol 164. 2018. PP 477-488.

Downloads

Published

2021-04-09

How to Cite

Adili, E., & Riginejad, M. (2021). ANALYZING THE EFFECT OF MICRO RUBBER, MICRO SIO2, AND NANO SIO2 IN MICROCRACKS IN SELF-CONSOLIDATING CONCRETE (SEM OBSERVATION). Stavební Obzor - Civil Engineering Journal, 30(1). https://doi.org/10.14311/CEJ.2021.01.0022

Issue

Section

Articles