Computers and Concrete

  • 제32권2호
  • /
  • Pages.185-206
  • /
  • 2023
  • /
  • 1598-8198(pISSN)
  • /
  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Optimization of mineral admixtures and retarding admixture for high-performance concrete by the Taguchi method

  • Chao-Wei Tang (Department of Civil Engineering & Geomatics, Cheng Shiu University)
  • 투고 : 2021.12.27
  • 심사 : 2023.05.02
  • 발행 : 2023.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

This article aimed to explore the optimization of mineral admixtures and retarding admixture for high-performance concrete. In essence, fresh concrete can be regarded as a mixture in which both coarse and fine aggregates are suspended in a cement-based matrix paste. Based on this view, the test procedure was divided into three progressive stages of binder paste, mortar, and concrete to explore their rheological behavior and mechanical properties respectively. At each stage, there were four experimental control factors, and each factor had three levels. In order to reduce the workload of the experiment, the Taguchi method with an L9(34) orthogonal array and four controllable three-level factors was adopted. The test results show that the use of the Taguchi method effectively optimized the composition of high-performance concrete. The slump of the prepared concrete was above 18 cm, and the slump flow was above 50 cm, indicating that it had good workability. On the other hand, the 28-day compressive strength of the hardened concretes was between 31.3-59.8 MPa. Furthermore, the analysis of variance (ANOVA) results showed that the most significant factor affecting the initial setting time of the fresh concretes was the retarder dosage, and its contribution percentage was 62.66%. On the other hand, the ANOVA results show that the most significant factor affecting the 28-day compressive strength of the hardened concretes was the water to binder ratio, and its contribution percentage was 79.05%.

키워드

과제정보

This research was funded by the Ministry of Science and Technology of Taiwan grant number MOST 108-2622-E-230-003-CC3. The author sincerely thanks the Ministry of Science and Technology of Taiwan for funding this research work.

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