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Characterization of K-175 Concrete SNI Standards Using Volcanic Ash Aggregates With Variation in Composition
Abd Hakim S1,2, Kerista Tarigan2, Timbangen Sembiring2, Manihar Situmorang3, Kerista Sebayang2 and Lia Yulistika Tamba1

1Department of Physics, Universitas Negeri Medan, Jl. William Iskandar Pasar V, Medan 20211, Indonesia
2Department of Physics, Universitas Sumatera Utara, Jl. Bioteknologi No. 1., Medan 20155, Indonesia
3 Department of Chemistry, Universitas Negeri Medan, Jl. William Iskandar Pasar V, Medan 20211, Indonesia


Abstract

K-175 concrete research has been carried out with two types of volcanic ash addition, namely variations of 0%, 6%, 8%, 10%, 12% (K-175 concrete) and 15%, 20%, 25%, 30% (density analysis XRD). K-175 concrete contributes to residential concrete. The making of K-175 concrete refers to SNI 7394: 2008 with compressive strength criteria of 14.53 Mpa. The method used is Precast concrete with sheet pile type. The making of concrete K-175 with the addition of cube-shaped volcanic ash with 15 cm sides consisting of cement, sand, broken stone, volcanic ash and water. After casting is done, the concrete is soaked in the tub and then removed from the soaking tub after 28 days of age dried for 24 hours. The following is the water absorption test and compressive strength test by selecting 3 samples which have the optimum compressive strength for XRD, SEM and FTIR tests to see the concrete characterization. Analysis of XRD, SEM, and FTIR are in the variation of 0%, 10% and 25% low absorption, compressive strength respectively 21.06 MPa, 21.16 MPa and 19.46 MPa. The pressure strength also fulfills the compressive strength of Portland cement type I which is 20 MPa.

Keywords: Concrete K-175, volcanic ash, absorption, compressive strength, analysis (XRD, SEM, FTIR)

Topic: Physics related sciences

Link: https://ifory.id/abstract/f2qeHnZxKkQ3

Conference: The 4th International Conference on Applied Physics and Materials Application (ICAPMA 2019)

Plain Format | Corresponding Author (Abd Hakim. S)

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