{"id":12949,"date":"2026-10-09T14:29:35","date_gmt":"2026-10-09T06:29:35","guid":{"rendered":"\/jase\/?post_type=tkuisotope&p=12949"},"modified":"2026-10-09T21:49:36","modified_gmt":"2026-10-09T13:49:36","slug":"jase-202701-36-009","status":"publish","type":"tkuisotope","link":"\/jase\/?tkuisotope=jase-202701-36-009","title":{"rendered":"Reduced-Density Concrete with Non-Expanded Sintered Clay Artificial Aggregate"},"content":{"rendered":"\n
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<\/i> 2027<\/a><\/p>\n<\/div>\n\n\n\n

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<\/i> Volume 36<\/a><\/p>\n<\/div>\n\n\n\n

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Sella Yuniar Marlianti and Tavio<\/i><\/a><\/p>\n\n\n\n

Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia<\/p>\n<\/div>\n\n\n\n

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Received: June 13, 2026
Accepted: September 03, 2026
Publication Date: October 09, 2026<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Multi-mechanical performance of reduced-density concrete with non-expanded clay-based ALWA. <\/p>\n<\/div>\n<\/div>\n\n\n\n

<\/i> Copyright <\/strong>The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0)<\/a>, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.<\/p>\n\n\n\n

Download Citation: BibTeX <\/a>| http:\/\/dx.doi.org\/10.6180\/jase.202701_36.009<\/a> <\/p>\n\n\n\n

Download PDF<\/a><\/p>\n\n\n\n

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This study evaluates reduced-density concrete incorporating non-expanded sintered clay artificial lightweight aggregate (ALWA) produced with coconut fiber ash and rice husk ash. Four coarse-aggregate substitution levels of 0%, 35%, 50%, and 100% by volume were tested for unit weight, compressive strength, and flexural strength at 7, 14, and 28 days. The ALWA exhibited a specific gravity of 1.62 g\/cm\u00b3 and water absorption of 27.49%, indicating a porous but mechanically viable aggregate. The 50% ALWA mixture achieved the best balance between density and mechanical performance, reaching 24.19 MPa compressive strength and 7.12 MPa flexural strength at 28 days, with a density of 2,210 kg\/m\u00b3. All ALWA mixtures exceeded the 17.24 MPa compressive-strength criterion used in SNI 03-3449-2002, although their densities remained above the structural lightweight-concrete limit commonly adopted in ACI 213R-14. The measured modulus-of-rupture-to-compressive-strength ratios exceeded ACI 318-19 and SNI 2847:2019 predictions under the ASTM C293 center-point loading configuration used in this study. The results support 50% ALWA replacement as a resource-efficient reduced-density concrete option for applications requiring moderate self-weight reduction, subject to further durability and serviceability verification.<\/p>\n\n\n\n

Keywords: Coconut fiber ash, Compressive strength, Flexural strength, Resource efficiency, Rice husk ash, Structural classification<\/em><\/p>\n\n\n\n

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