Durability Performance of Blended Cements Incorporating Egyptian SRC and GBFS in Aggressive Water
H. El-Didamony1, S. Abd El-Aleem Mohamed2, H. Gouda3
1H. El-Didamony, Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt.
2S. Abd El-Aleem Mohamed, Department of Chemistry, Faculty of Science, Fayoum University, Fayoum, Egypt.
3H. Gouda, Department of Chemistry, Faculty of Science, Fayoum University, Fayoum, Egypt.
Manuscript received on July 29, 2015. | Revised Manuscript received on August 05, 2015. | Manuscript published on August 15, 2015. | PP: 23-35 | Volume-3 Issue-9, August 2015. | Retrieval Number: I0927083915/2015©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The durability of concrete has been a major concern of civil engineering professionals over the last few decades. Durability is the capacity of concrete to resist deterioration caused by aggressive environments. An experimental investigation was carried out to evaluate the durability properties of blended cements prepared from substitution of SRC with different percentages of GGBFS up to 75 mass, %. The ingredients of each dry mix were homogenized, and then hydrated with the water of standard consistency. The specimens were cured under tap water for 28 days (zero time), then immersed in marine environment up to 12 months. The hydration products were analyzed using DTA, IR and XRD techniques. The durability properties were determined by measuring: free lime, combined water, bulk density, compressive strength, total sulfate and total chloride contents for each mix at different immersing ages. The results revealed that, GGBFS decreases the accessibility of SO4 2- and Cl-to penetrate into the pore system. Hence the total sulfate and total chloride contents decrease. Therefore, the durability performance of SRC is greatly enhanced by the use of high GGBFS contents. The composite cements containing 45-55 mass, % of GGBFS are comparable to or outperform SRC up to one year of immersion in aggressive water.
Keywords: Blended Cements; GGBFS; SRC; Durability; Bulk density and Compressive strength.