Advertisement

Assessment of Different Shapes and Grain Sizes of Bentonite Aggregates in Lightweight Concretes

  • A. I. M. Ismail
  • E. R. Souaya
  • A. Abd El-Hakeem
Building Materials

Abstract

This study deals with the production of lightweight concretes from bentonite aggregates. Bentonite ball pellets of different grain sizes were prepared and the green pellets were then dried for 48 h in open air to allow the water of workability to release. They were then fired in a muffle furnace at a rate of 20 K/min for 1 h at 1150°C. This temperature is the best temperature and yields the lowest density and higher bloatability without complete melting of the pellets. The bloatability of the investigated clay pellets was followed by the bulk density. The bentonitic materials were investigated for their chemical and mineralogical composition (XRD, SEM and EDX). The physico-mechanical properties including compressive strength were investigated on concrete pastes. Also, the phase composition was determined by XRD, SEM and EDX. The results of the compressive strength, density and bulk density showed that these lightweight concretes were affected by the type, shape and the percentage of aggregates, the cement paste and the interfacial zone between cement and aggregates. Strength minerals represented by calcium silicate-hydrate (CSH) and calcium aluminate-hydrate (CAH), which lead to the concrete strength.

Keywords

bentonite lightweight concrete interfacial zone engineering parameters 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. ][1]
    Yang, C.C.: Approximate elastic moduli of lightweight aggregate. Cem. Concr. Res. 27 (1997) [7] 1021–1030CrossRefGoogle Scholar
  2. ][2]
    Mindess, S., Young, J.F.: Concrete. Englewood Cliffs, Prentice-Hall, NJ, USA, (1981) 67, ISBN-10: 0131671065Google Scholar
  3. ][3]
    Chi, J.M., Huang, R., Yang, C.C., Chang, J.J.: Effect of aggregate properties on the strength and stiffness of lightweight concrete. Cem. Concr. Comp. 25 (2003) 197–205CrossRefGoogle Scholar
  4. ][4]
    Baalbaki, W., Benmokrance, B., Chaallal O., Aitcin, P.C.: Influence of coarse aggregates on elastic properties of high performance concrete. ACI Mater. J. 88 (1991) [5] 449–503Google Scholar
  5. ][5]
    Giaccio, G., Rocco, C., Violini, D., Zappitelli, J., Zerbino, R.: High strength concrete incorporating different coarse aggregates. ACI Mater. J. 89 (1992) [3] 242–246Google Scholar
  6. ][6]
    Nilsen, A.U., Monteiro, J.M., Gjorv, O.E.: Estimation of the elastic modulus of lightweight aggregate. Cem. Concr. Res. 25 (1995) [2] 276–280CrossRefGoogle Scholar
  7. ][7]
    Ismail, A.I.M., Sadek-Ghabrial, D.: Acidic rocks as aggregates in concrete: Engineering properties, microstructures and petrologic characteristics. Geotech. Geol. Eng. 27 (2009) 519–528CrossRefGoogle Scholar
  8. ][8]
    Ismail, A.I.M., Elmaghraby, M.S., Mekky, H.S.: Engineering properties, micro-structure and strength development of lightweight concrete containing pumice aggregates. Geotech. Geol. Eng. 31 (2013) 1465–1476CrossRefGoogle Scholar
  9. ][9]
    Ismail, A.I.M., Mekky, H.S., Elmaghraby, M.S: Assessment and utilization of some Egyptian clay deposits for producing lightweight concrete. Int. J. Mater. Sci. and Appl. 3 (2014) [3] 79–83Google Scholar
  10. ][10]
    Ismail, A.I.M., Darwish, H.: Engineering behaviour of waste glass as aggregates in concrete containing sand and gravels. Interceram 63 (2014) [1–2] 45–48Google Scholar
  11. ][11]
    Ismail, A.I.M., Elmaghraby, M.S: Effect of Limestone Composition and Microstructure on the Strength of Aggregates and Concretes. Interceram 64 (2015) [1–2] 28–32Google Scholar
  12. ][12]
    Kumar, S.: Utilisation of FaL-G bricks and blocks in buildings. Ind. Concr. J. 75 (2001) [7] 463–467Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden 2016

Authors and Affiliations

  • A. I. M. Ismail
    • 1
  • E. R. Souaya
    • 2
  • A. Abd El-Hakeem
    • 3
  1. 1.Geological Sciences DepartmentNational Research CentreDokki, CairoEgypt
  2. 2.Faculty of ScienceAin Shams UniversityAbbassia, CairoEgypt
  3. 3.Central laboratory servicesEgyptian Mineral Resources AuthorityCairoEgypt

Personalised recommendations