NURHANUMAN. ZAJ, NIM. 112021124 (2025) PENGARUH SUBSTITUSI WOOD ASH TERHADAP STRUKTUR MIKRO MORTAR POLIMER DITINJAU DARI DISTRIBUSI PARTIKEL DAN PERMUKAAN PADA PENGUJIAN SEM (SCANNING ELECTRON MICROSCOPE). Skripsi thesis, UNIVERSITAS MUHAMMADIYAH PALEMBANG.

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Abstract

This study examines the effect of using wood ash instead of epoxy resin on the microstructure of polymer mortar. A scanning electron microscope (SEM) was used to examine particle distribution and surface characteristics. The goal is to utilize wood ash, a wood waste product with pozzolanic properties, as a sustainable additive to reduce reliance on synthetic resins and environmental impact. The research method involves preparing polymer mortar samples with wood ash substitutions of 0%, 5%, 10%, 15%, and 20% (by mass percentage), and curing them for 28 days. The specimens were then tested for compressive strength. An SEM was used to observe changes in pore distribution and inter-material bonding. The microstructure was characterized using the SEM, accompanied by image analysis with ImageJ and data processing with Origin, to detect particle distribution and surface statistics. The observed microstructure results are consistent with the mechanical data of the 10% wood ash composition, which exhibited the highest compressive strength among the tested variations. After 28 days, compressive strength testing of the polymer mortar showed that the 10% substitution produced the highest compressive strength, at 57,38 MPa. These results indicate two contributions: (1) physical filling by wood ash particles, which improves packing, and (2) the possible pozzolanic activity of wood ash, which contributes to the formation of a secondary binding phase at the matrix interface. The reduction in porosity and the increase in density of the microstructure explain the improvement in its mechanical performance. This improvement is achieved by distributing stress more effectively and by narrowing the liquid penetration pathways. Conversely, substituting more than 20% wood ash reduces performance because excess wood ash affects the strength of the matrix.

Item Type:	Thesis (Skripsi)
Additional Information:	1. Ir. Revisdah, M.T. 2. Dr. Veinazul Septriansyah, S.T., M.T.
Uncontrolled Keywords:	wood ash, polymer mortar, SEM, particle distribution, microstructure, pozzolanic
Subjects:	Teknik Sipil > Bahan-bahan Bangunan
Divisions:	Fakultas Teknik > Teknik Sipil (S1)
Depositing User:	Mahasiswa Fakultas Teknik
Date Deposited:	04 May 2026 04:51
Last Modified:	04 May 2026 04:51
URI:	http://repository.um-palembang.ac.id/id/eprint/35296

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