Mechanical and compatibility properties of alkali-activated repair mortar reinforced with microfibers
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Praneedpolkrang P.; Dokduea W.; Mangkhang K.; Jaturapitakkul C.; Tangchirapat W.
ผู้เผยแพร่: Elsevier
ปีที่เผยแพร่ (ค.ศ.): 2025
Volume number: 22
นอก: 2214-5095
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
This study investigates the performance of alkali-activated mortar (AAM) reinforced with various contents and types of microfibers as a potential material for repair applications. The AAM was produced by combining ground low-calcium fly ash (GF) with ground calcium carbide residue (GC) and activated with a solution of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). A mixture incorporating microfiber i.e. basalt fiber (BF), polyacrylonitrile fiber (PF), and steel fiber (SF) at a 0.2 % dosage, as well as mixture with BF ranging from 0.1 % to 0.3 % volume fraction, were examined. The evaluated AAM mixtures' properties included setting time, workability, compressive strength, shrinkage, direct pull-off strength, slant shear strength, and Baenziger block performance. Moreover, morphological and elemental analyses were conducted using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The findings revealed that incorporating microfibers reduced the flowability and setting time of fresh AAM. The development of compressive strength can be attributed to the formation of C-S-H, C-A-S-H, and N-A-S-H gels, as supported by the microstructure analysis. In addition, the inclusion of microfibers did not significantly impact compressive strength. The bond strength was found to be directly proportional to compressive strength. Furthermore, the use of microfibers effectively reduced the AAM's total shrinkage due to the bridging effect and also prevented crack propagation in the Baenziger block. Lastly, the performance of the AAMs met the requirements specified in EN 1504-3. © 2025 The Authors
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