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http://dx.doi.org/10.5345/JKIBC.2018.18.3.211

Proposals for Revision of Lightweight Aggregate Concrete Specifications Based on In-situ Quality Control on Concrete  

Lee, Kyung-Ho (Department of Architectural Engineering, Graduate School, Kyonggi University)
Yang, Keun-Hyeok (Department of Architectural Engineering, Kyonggi University)
Publication Information
Journal of the Korea Institute of Building Construction / v.18, no.3, 2018 , pp. 211-218 More about this Journal
Abstract
This study examined the reliability and revision necessity of concrete standard specifications based on the comparisons with test data obtained by using domestic artificial lightweight aggregates and the contents specified in different foreign specifications including ACI 211.2, ACI 213, ACI 301, JASS 5 and CEB-FIP. To achieve the continuous particle distribution of domestic fine lightweight aggregates, the partial addition of natural sand with the maximum size of 2.5mm was required. To control the segregation and excessive bleeding in the fresh lightweight concrete, the current limitations on the water-to-binder ratio and unit water content need to be modified using lower values. In particular, a rational mixture proportion approach of lightweight concrete needs to be established for the targeted requirements of initial slump, 28-day compressive strength, air content and dry unit weight. Ultimately, significant revision of the concrete standard specifications is required considering the characteristics of domestic artificial lightweight aggregates.
Keywords
lightweight aggregate concrete; specifications; mixture proportioning; targeted requirements;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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