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Advances in Concrete Construction
  Volume 8, Number 2, October 2019, pages 119-126
DOI: http://dx.doi.org/10.12989/acc.2019.8.2.119
 


Durability performance of concrete containing Saudi natural pozzolans as supplementary cementitious material
Omar S. Baghabra Al-Amoudi, Shamsad Ahmad, Saad M.S. Khan and Mohammed Maslehuddin

 
Abstract
    This paper reports an experimental investigation conducted to evaluate the durability performance of concrete mixtures prepared utilizing blends of Type I Portland cement (OPC) and natural pozzolans (NPs) obtained from three different sources in Saudi Arabia. The control concrete mixture containing OPC alone as the binder and three concrete mixtures incorporating NPs were prepared keeping water/ binder ratio of 0.4 (by weight), binder content of 370 kg/m3, and fine/total aggregate ratio of 0.38 (by weight) invariant. The compressive strength and durability properties that included depth of water penetration, depth of carbonation, chloride diffusion coefficient, and resistance to reinforcement corrosion and sulfate attack were determined. Results of this study indicate that at all ages, the compressive strength of NP-admixed concrete mixtures was slightly less than that of the concrete containing OPC alone. However, the concrete mixtures containing NP exhibited lower depth of water penetration and chloride diffusion coefficient and more resistance to reinforcement corrosion and sulfate attack as compared to OPC. NP-admixed concrete showed relatively more depth of carbonation than OPC when subjected to accelerated carbonation. The results of this investigation indicates the viability of utilizing of Saudi natural pozzolans for improving the durability characteristics of concrete subjected to chloride and sulfate exposures.
 
Key Words
    Saudi natural pozzolan; cement replacement; concrete; compressive strength; durability characteristics
 
Address
Omar S. Baghabra Al-Amoudi, Shamsad Ahmad, Saad M.S. Khan: Civil & Environmental Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
Mohammed Maslehuddin: Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
 
References
    -acc0802004-
 

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