EFFECT OF CYCLIC NaCl SOLUTION IMMERSION CURING ON THE MECHANICAL PROPERTIES OF PLAIN CONCRETE

  • Wei He Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China
  • Shoujun Wu Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling Shaanxi, People’s Republic of China
  • Bo Zhang College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
  • Yiming Luo College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
  • Yanyu Liu College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
  • Guo Fu College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Keywords: concrete, microstructure, phase compositions, mechanical property, curing, NaCl solution

Abstract

The effects of cyclic curing (CC) alternating between NaCl solution immersion and drying for 28 d on the microstructure, phase composition and mechanical properties of ordinary concrete are studied in comparison with those cured by standard curing using municipal water. Compared to standard curing, CC enhances the compressive strength, flexural strength and static compressive elastic modulus of concrete by (5.71, 11.14 and 8.06) %, respectively. Ca(OH)2 is significantly reduced, while C-S-H is increased, and a minor amount of 3Ca(OH)2·CaCl2·12H2O is formed. Hydration products become finer, more uniform and denser. The use of CC is proposed as it improves the strength.

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Published
2024-04-03
How to Cite
1.
He W, Wu S, Zhang B, Luo Y, Liu Y, Fu G. EFFECT OF CYCLIC NaCl SOLUTION IMMERSION CURING ON THE MECHANICAL PROPERTIES OF PLAIN CONCRETE. MatTech [Internet]. 2024Apr.3 [cited 2024May18];58(2):165–171. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/794