Sinabung Volcanic Ash Utilization As The Additive for Paving Block Quality A and B

1st Annual Applied Science and Engineering Conference

工业技术;自然科学

Sembiring, I.S.^1 ; Hastuty, I.P.^1

Departement of Civil Engineering, University of Sumatera Utara, Jl. Almamater Kampus, Medan

20155, Indonesia^1

关键词: Absorption values;    Adhesive materials;    Cement and concretes;    Fresh concrete;    Material testing;    Mixed materials;    Paving blocks;    Road structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/180/1/012142/pdf
DOI  :  10.1088/1757-899X/180/1/012142

来源: IOP

【 摘 要 】

Paving block is one of the building materials used as the top layer of the road structure besides asphalt and concrete. Paving block is made of mixed materials such as portland cement or other adhesive materials, water and aggregate. In this research, the material used as the additive of cement and concrete is volcanic ash from Mount Sinabung, it is based on the results of the material testing, Sinabung ash contains 74.3% silica (SiO2). The purpose of this research aims to analyze the behavior of the paving blocks quality A and B with and without a mixture of Sinabung ash, to analyze the workability of fresh concrete using Sinabung ash as an additive in concrete, and to compare the test results of paving blocks with and without using Sinabung ash. The samples that we made consist of four variations of the concrete mix to experiment a mixture of normal sample without additive, samples which are mixed with the addition of Sinabung ash 5%, 10%, 15%, 20% and 25% of the volume of concrete/m3. Each variation consists of 10 samples of the concrete with 28 days curing time period. We will do the compressive strength and water absorption test to the samples to determine whether the samples are in accordance with the type needed. According to the test result, paving blocks with Sinabung ash and curing time reach quality A at 0%, 5% and 10% mixture with the compressive strength of each 50.14 MPa, 46.20 MPa and 1.49Mpa, and reach quality B at 15%, 20 %,25% mixture with curing time and 0%, 5%, 10%, 15%, 20% and 25% mixture without curing time. According to the absorption values we got from the test which are 6.66%, 6.73%, 6.88%, 7.03%, 7.09% and 7.16%, the entire sample have average absorption exceeding SNI standardization which is above 6% and reach quality C. Based on compressive strength and absorption data obtained Sinabung ash can't fully replace cement as the binder because of the low CaO content.