Refractory and Mechanical Properties of Dealuminated Kaoline-Based Geopolymer Concrete
Mostafa Shaaban
Mostafa Shaaban, Lecturer, Civil Engineering Department, Giza Higher Institute for Engineering and Technology, Egypt.

Manuscript received on January 02, 2020. | Revised Manuscript received on January 15, 2020. | Manuscript published on January 30, 2020. | PP: 2045-2049 | Volume-8 Issue-5, January 2020. | Retrieval Number: E5623018520/2020©BEIESP | DOI: 10.35940/ijrte.E5623.018520

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Abstract: This study has been performed to evaluate the performance of the industrial by-product dealuminated kaolin (DK) as geopolymer paste in production a refractory concrete. The paper study the thermal and mechanical properties of concrete mixtures containing crushed refractory brick as combined aggregate and geopolymer paste produced from the blend of 10%, 20% and 30% of DK, ordinary Portland cement (OPC), solution of sodium hydroxide and sodium silicate as alkaline activator. These concrete mixtures were tested for workability, shrinkage at 400,800 and 1200 °C, thermal shock resistance at temperature of 950 °C, Cold crushing strength, tensile strength, and elastic modulus. The results of these mixtures compared with the results of concrete mixtures containing 100% OPC and 100% aluminous cement (AC) .The results show that the thermal and mechanical properties of geopolymer concrete produced by dealuminated kaolin (DK) are enhanced. Also, it is found that mixture contains 20% of DK appears to be the optimal geopolymer concrete mixture.
Keywords: Dealuminated kaolin, Geopolymer, Refractory Concrete, industrial by-product, Thermal Properties, Strength.
Scope of the Article: Concrete Engineering.