Effect of the Aggregate Size on Strength Properties of Recycled Aggregate Concrete

Ma, Keping; Li, Weibin

doi:10.1155/2018/2428576

Cited by 29 publications

(10 citation statements)

References 27 publications

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“…Evaluasi yang dilakukan oleh Kang & Weibin (2018) terhadap pengaruh ukuran AR untuk pengujian kuat tekan. Tiga jenis ukuran partikel (A-5/16mm, B-16/20, C-20/31.5) digunakan dalam produksi campuran BAR dengan rasio air semen sebesar 0.47 dan 0.53 serta variasi isi pengganti AN dalam beton.…”

Section: Sifat Mekanik Bar 221 Kuat Tekanunclassified

Evaluasi Kuat Tekan Beton Recycle Agregat Dengan Campuran Air Laut Dan Prediksi Modulus Elastisitasnya

Sulaiman¹

2018

JIIT

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Produksi beton dengan konsumsi air tawar yang cukup tinggi menjadi fokus utama oleh pemerintah dan insinyur akhir-akhir ini untuk mengatasi permasalahan yang terjadi. Ditambah, agregat normal (AN) yang semakin hari semakain berkurang jumlahnya dari sumber-sumber alamiahnya merupakan hal yang krusial untuk mencari alternatif pengganti. Oleh karena itu, penelitian ini memaparakan secara eksplisit sifat kuat tekan beton recycle agregat dengan air laut sebagai campuran dalam pembuatan beton sebagai material bangunan struktur dan prediksi modulus elastisitasnya. Pengujian eksperimen laboratorium dilakukan terhadap total tiga puluh spesimen uji berbentuk silinder (15x30cm) untuk mengevaluasi durabilitas beton dibawah pengaruh beban tekan dengan target sebesar 300 kg/cm² (29 MPa). Dua komposisi campuran yang berbeda disiapkan dimana campuran pertama adalah 100% air laut dan 100% agregat recycle dan kedua adalah campuran 100% air tawar dan 100% agregat recycle sebagai kontrol beton dengan faktor air semen sebesar 0.45. Kemudian spesimen uji diletakkan kedalam bak perendaman yang menggunakan air tawar dengan perbedaan waktu perawatan yaitu 3, 7, 14, 21, dan 28 hari. Hasil pengujian memperlihatkan bahwa kombinasi antara beton agregat recycle dengan campuran air laut (BAR-AL) memiliki kuat tekan awal tinggi pada umur 3 hari perawatan dan dicapai perbedaan kuat tekan sebesar 21% jika dibandingkan beton agregat recycle dengan campuran air tawar (BAR-AT) pada umur 28 hari. Oleh karena iu, diperlukan metode pendekan tertentu untuk meningkatkan kuat tekan BAR-AL agar setara bahkan lebih besar dari kuat tekan BAR-AT. Prediksi modulus elastisitas beton recycle dilakukan dengan menggunakan empat pendekatan matematis. Dari hasil analisis, persamaan empiris modulus elastisitas yang lebih mendekati real adalah dengan menggunakan pers.5 untuk BAR-AL dan persamaan matematis ACI318-14 untuk BAR-AT

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Section: Sifat Mekanik Bar 221 Kuat Tekanunclassified

Evaluasi Kuat Tekan Beton Recycle Agregat Dengan Campuran Air Laut Dan Prediksi Modulus Elastisitasnya

Sulaiman¹

2018

JIIT

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“…It is estimated that, in terms of construction and building activities, about 40% of energy and 50% of natural resources are depleted, causing 15%-30% of total solid-waste production [6], purpose [28]. However, previous studies related to RCAs focused on a comprehensive investigation of mechanical properties with fewer variables or lesser levels of variables, and few further analyzed multiple factors and levels with regard to the performance of RCA mixtures [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Durability Properties of Cement-Stabilized Recycled Concrete Aggregate

2020

Sustainability

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This research investigates the effect of using recycled concrete aggregate (RCA) as a partial replacement of natural aggregate (NA) on the mechanical and durability-related properties of a cement-stabilized recycled concrete aggregate (CSR) mixture. In this case, mixtures were prepared with 0%, 40%, 70%, and 100% (by weight) RCA to replace NA, and cement contents of 4%, 5%, and 6% were used in this study. Test parameters included the replacement ratio, cement content, and curing time. Tests were carried out to establish the unconfined compressive strength (UCS), indirect tensile strength (ITS), drying shrinkage, and water loss ratio of each mix proportion. The preliminary results of UCS and ITS tests indicated that the incorporation of RCA resulted in a decrease of strength compared with a cement-stabilized macadam (CSM) mixture, but the seven-day strength of the CSR mixture met the related requirements of road bases. The increase in cement content and curing time had an obvious effect on strength improvement. The drying shrinkage test showed that the drying shrinkage properties of the CSR mixture were obviously reduced with a high replacement ratio. It is evident that the CSM mixture presented a better drying shrinkage performance than that of the CSR mixture.

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“…Beyond this percentaget the strength starts to reduce [1]. Based on the quantity and size of recycled aggregate, a regression model has been modified appropriately by test results [2]. The increase of Recycled aggregate content and w/c ratio decreases the durability of concrete [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Recycled Aggregates on Strength and performance of Recylced Aggregate Concrete

Reddy¹,

Swaroop²

2020

E3S Web Conf.

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This study is taken up to utilise the recycled coarse aggregate and recycled fine aggregate as replacement of natural aggregate in concrete mix. It is required to find the percentage of recycled coarse aggragate and recycled fine aggregate, as the strength of concrete can not be achieved by using higher percentaged. The purpose of study is to compare between recycled coarse aggregate and recycled fine aggregate with natural coarse aggregate and sand in terms of specific gravity, water absorption, particle size distribution. Further, this stydy will also consider the difference between the performance of Recycled Aggregate Concrete for different percentages of recycled coarse aggregate and recycled fine aggregate i.e for 0%, 10%, 15%, 20%, 25%, 30%, 35% replacement. The present study is an experimental investigation on the behaviour of recycled aggregate concrete (coarse& fine aggregates) with respect to the strength and performance.

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Effect of the Aggregate Size on Strength Properties of Recycled Aggregate Concrete

Cited by 29 publications

References 27 publications

Evaluasi Kuat Tekan Beton Recycle Agregat Dengan Campuran Air Laut Dan Prediksi Modulus Elastisitasnya

Evaluasi Kuat Tekan Beton Recycle Agregat Dengan Campuran Air Laut Dan Prediksi Modulus Elastisitasnya

Mechanical and Durability Properties of Cement-Stabilized Recycled Concrete Aggregate

Effect of Recycled Aggregates on Strength and performance of Recylced Aggregate Concrete

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