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The Effect of Styrofoam Artificial Lightweight Aggregate (ALWA) on Compressive Strength of Self Compacting Concrete (SCC) Darayani, Dhiafah Hera; Tavio, Tavio; Raka, I G. P.; Puryanto, Puryanto
Civil Engineering Journal Vol 4, No 9 (2018): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (964.225 KB) | DOI: 10.28991/cej-03091143

Abstract

Self-compacting concrete (SCC) is a fresh concrete that is able to flow and fill up the formwork by itself without the need of a vibrator to compact it. One of the reasons that causes the damage of a building structure during an earthquake is the heavy weight of its structural members which are from the high density of the material used such concrete material. Lightweight aggregate is one of the solutions to reduce the weight of the structure. Therefore, the SCC using the artificial lightweight aggregate (ALWA) is one of the solutions to reduce the self-weight (dead load) of a structure. This research was conducted to investigate the impact of the use of ALWA in conventional concrete and SCC in terms of its compressive strength and modulus of elasticity. To study the impact of the use of ALWA in SCC, several variation of percentage of ALWA as a substitution to the natural coarse aggregate was examined. The proportions of ALWA as a replacement to the coarse aggregate were 0%, 15%, 50%, and 100%. The test specimens were the cylindrical concrete of 200 mm in height and 100 mm in diameter for both compressive strength and modulus of elasticity tests. The results of the compressive strength test indicated that the higher the percentage of ALWA used in SCC, the lower the compressive strength of the concrete. The addition of ALWA as a substitution to the natural coarse aggregate to conventional concrete and SCC was found optimum at 15% replacement with the compressive strength of conventional concrete and SCC of 21.13 and 28.33 MPa, respectively. Whereas, the modulus of elasticity of the conventional concrete and SCC were found to be 20,843.99 and 23,717.77 MPa, respectively.
Split Tensile Strength of Self Compacting Concrete with Artificial Lightweight Aggregate Dhiafah Hera Darayani
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 7, No 1 (2022): March
Publisher : Litbang Pemas - Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v7i1.779

Abstract

Earthquake damage to buildings is directly proportionate to the weight of the structure. Selfcompacting concrete is a type of concrete that can consolidate without the use of vibrator. To minimize damage structures caused by earthquakes, infrastructure development needs lighter materials and superior workmanship. Lightweight aggregate can reduce weight of the structure, SCC with ALWA is a solution to reduce dead load of the structure with ease of execution. The purpose of this study is to see how much the split tensile strength influences the composition of ALWA as coarse aggregate substitute in Normal Concrete and SCC. The proportions of ALWA that substituted into concrete were 0%, 15%, 50% and 100%. There are 24 cylindrical specimens, each measuring 100 mm in diameter and 200 mm in height. The analysis was carried out using ASTM C 496/C 496M. The results of split tensile strength show that the higher variation in the composition of ALWA, the lower split tensile strength produced. The addition of ALWA as a substitute for coarse aggregate in a mixture of normal and SCC concrete was most effective at 15% ALWA with a split tensile strength of normal concrete 2.23 MPa and SCC 2.32 MPa.
Pengujian Kuat Tekan Beton Ringan dengan Penggantian Agregat Kasar Batu Apung pada Variasi Lama Perendaman Dhiafah Hera Darayani
JURNAL AVESINA Vol 15 No 2 (2021): Jurnal Avesina
Publisher : Universitas Islam Al-Azhar

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Abstract

Berat bangunan mempengaruhi tingkat kerusakan yang akan terjadi, semakin berat suatubangunan maka kerusakan yang akan terjadi juga semakin besar, sebaliknya jika semakin ringansuatu bangunan maka kerusakan yang akan terjadi juga semakin kecil. Salah satu cara untukmengurangi berat sendiri bangunan yaitu dengan cara mengurangi beban mati. Beban matistruktural yang lebih kecil ini juga dapat memberikan keuntungan dalam pengurangan ukuranpondasi yang diperlukan. Untuk mengurangi beban mati dapat dilakukan dengan cara menggunakanbeton ringan. Jumlah penggunaan beton ringan yang banyak dalam konstruksi mengakibatkanpeningkatan kebutuhan material beton ringan. Alternatif yang dapat digunakan untuk mengatasimasalah tersebut yaitu dengan memanfaatkan batu apung sebagai pengganti agregat kasarnya.Tujuan dari penelitian ini adalah untuk mengetahui seberapa besar pengaruh kuat tekan pada betonringan yang menggunakan agregat kasar batu apung dengan variasi lama waktu perendaman. Hasildari penelitian ini kuat tekan terbesar diperoleh pada waktu perendaman 56 hari yaitu sebesar15.192 MPa. Semakin lama waktu perendaman, maka semakin besar kuat tekan yang dihasilkan.