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Roller Compacted Concrete (RCC) is a type of concrete that is compacted using a roller and has quite stiff properties due to zero slump. The use of RCC pavement has several advantages because it is strong, dense, and durable. RCC usually uses cement and water as a binder, which has an impact on increasing CO2 to the environment. This research uses RCC geopolymer (RCGC) to reduce cement. This study investigates how the molarity and the coarse aggregate size affect the alkali activator content and dry density of RCGC. The molarity of NaOH is used 2M and 4M. The coarse aggregate sizes were 10, 12.7, and 19 mm. The test results showed that the optimum alkali activator content at 2M was greater than 4M. Maximum dry density at 2M lower than 4M for coarse aggregate 10 and 12.7 mm. The compressive strength of RCC geopolymer 2M and 4M, with an SS/SH is 1.0, can potentially be recommended for pavement application.

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Effects of Sodium Hydroxide Molarity and Coarse Aggregate Size on Alkali Activator Content of Roller-Compacted Geopolymer Concrete

  • 会议论文

  • 发表日期：

    2025年

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  • Dewi Sulistyorini,
  • Sholihin As’ad,
  • Endah Safitri,
  • Abdul Rahman Mohd Sam

摘要

Roller Compacted Concrete (RCC) is a type of concrete that is compacted using a roller and has quite stiff properties due to zero slump. The use of RCC pavement has several advantages because it is strong, dense, and durable. RCC usually uses cement and water as a binder, which has an impact on increasing CO2 to the environment. This research uses RCC geopolymer (RCGC) to reduce cement. This study investigates how the molarity and the coarse aggregate size affect the alkali activator content and dry density of RCGC. The molarity of NaOH is used 2M and 4M. The coarse aggregate sizes were 10, 12.7, and 19 mm. The test results showed that the optimum alkali activator content at 2M was greater than 4M. Maximum dry density at 2M lower than 4M for coarse aggregate 10 and 12.7 mm. The compressive strength of RCC geopolymer 2M and 4M, with an SS/SH is 1.0, can potentially be recommended for pavement application.