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All Journal Pillar of Physics: Jurnal Berkala Ilmiah Fisika
Syafriani, -
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Earth & Planetary Sciences Materials Science & Nanotechnology Physics

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Compressive Strength Analysis of Mortar Made from Volcanic Sand in Nagari Aia Angek Based on Magnetic Mineral Content Amirullah, Fajar Fikri; Hamdi, -; Dwiridal, Letmi; Amir, Harman; Syafriani, -; Ratnawulan, -
PILLAR OF PHYSICS Vol 17, No 1 (2024)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/15247171074

Abstract

Mortar is a binder or adhesive with a standard viscosity of ingredients (water, cement, and sand). Mortar made has strength, mortar strength is measured using Cement Compression testing machine. Sand in mortar making contains magnetic minerals such as magnetite (Fe3O4) or Fe2+3Fe+2O4-2, hematite mineral (α-Fe2O3) which will be measured for magnetic susceptibility value using Bartington Magnetic Susceptibility Meter Sensor Type B (MS2B). To determine the concentration of magnetic minerals and their relationship with mortar compressive strength, the rock magnetism method was used. Measurement of sand samples of Kamumuan River, Sungai Limau District using Bartington Magnetic Susceptibility Meter Sensor Type B (MS2B) by categorizing sand into 3 treatment, namely Addition of magnetic minerals (PTM) with χLF value 3863.3 x 10-8m3/kg and χFD (%) 0.72, reduction of magnetic minerals (PKM) with χLF value 1920 x 10-8m3/kg and χFD (%) 0.79, normal magnetic minerals (PM) with χLF value 2334.7 x 10-8m3/kg and χFD (%) 0.62. The sample has a grain type that is almost no superparamagnetic grain and has antiferromagnetic properties. Samples grouped by treatment were made into mortar and tested using a cement compression testing machine with the results of mortar compressive strength, namely ATM of 49.4 Kg/cm², AKM of 46.6 Kg/cm², and AM 52.3 Kg/cm². Based on the analysis conducted, the magnetic minerals contained in the sand affect the results of the compressive strength of the mortar, the higher the susceptibility value in the sand, the stronger the compressive strength of the mortar
Compressive Strength Analysis of Mortar Made from Volcanic Sand in Nagari Aia Angek Based on Magnetic Mineral Content Sumanti, Syahputri; Hamdi, -; Akmam, -; Amir, Harman; Syafriani, -; Ratnawulan, -
PILLAR OF PHYSICS Vol 17, No 1 (2024)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/15122171074

Abstract

Compressive strength testing is carried out on mortar made from a mixture of sand, cement and water. Mortar is one of the construction materials in building structures that has the main function as a material for construction parts. The compressive strength test is useful for measuring and knowing the strength of objects against compressive forces. The method used in this research is rock magnetism to determine the abundance of magnetic minerals and compressive strength testing to determine the relationship of compressive strength results to the magnetic minera content of Nagari Aia Angek volcanic sand. Volcanic sand is measured using a Bartington Susceptibility Meter Type MS2B with 3 forms of mineral separation treatment, namely Magnetic Mineral Reduction (PMM) with a value of χlf  505,99 x10 m-83 /kg, χfd (%) 2.72%, Additional Magnetic Minerals (TMM) with a value of χlf 1026.72 x10 m-83 /kg, χfd (%) 2.14%, and No Treatment (TP) with a value of χlf 853.98 x10 m-83 /kg, χlf (%) 2.16. The results of testing the compressive strength of mortar using Compression Testing Mechine on 3 volcanic sand treatments were obtained (PMM) with a value of 169.14 kg/cm2, (TMM) with a value of 147.11 kg/cm2, and (TP) with a value of 141.81 kg/cm2. The magnetic properties of volcanic sand samples are antiferrimagnetic and have superparamagnetic mixed grains and coarse grains. There is a relationship between the compressive strength value of mortar and the concentration of magnetic minerals, the higher the compressive strength value, the higher the χfd (%) value obtained
Study of Seismic Hazard Level Based on Microtremor Measurement Analysis in Koto Tangah District, Padang City Emriska, Vellya Ramadhani; Syafriani, -; Fauzi, Ahmad; Dwiridal, Letmi
PILLAR OF PHYSICS Vol 17, No 2 (2024)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/13489171074

Abstract

The city of  Padang is tectonically one of the areas with very high seismic activity in Indonesia. Therefore, we conduct a study to determine the level of seismic hazard using analysis of microtremor measurements in the sub-district of Koto Tangah, Padang City, as well as micro-zoning the distribution of the dominant frequency value, amplification value, dominant period, and seismic vulnerability index. The type of research is descriptive research, namely by taking microtremor data using a sysmatrack MAE seismograph and S3S sensor in Koto Tangah sub-district, Padang city. Microtremor data processing uses geopsy software to remove noise data and see the dominant frequency and amplification values. From the results obtained, the gypsy software then made a contour mapping of its value using the surfer 13 application and microzonation mapping. The results obtained from this study in the Koto Tangah sub-district, Padang City, are areas that are vulnerable to seismic hazards whose data can be seen from the distribution of the micro zonation value of dominant frequency (f0), amplification factor (A0), dominant period (T0), and seismic vulnerability index value. (Kg) is included in the medium to high category due to the influence of underground geology.
Co-Authors - Hamdi AA Sudharmawan, AA Akmam Akmam Amirullah, Fajar Fikri Emriska, Vellya Ramadhani Harman Amir Letmi Dwiridal Ratnawulan . Sumanti, Syahputri