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J-H. Tay, W-K. Yip, "Lightweight Concrete Made with Sludge Ash", in B.H.V. Topping, (Editor), "Proceedings of the International Conference on the Design and Construction of Non-Conventional Structures", Civil-Comp Press, Edinburgh, UK, pp 205-213, 1987. doi:10.4203/ccp.7.20.2

Abstract

Sludge is an inevitable by-product of waste water treatment. Its abundance poses disposal problems which can be drastically reduced if sludge can be converted for economical uses in construction as substitute materials.

Digested and dewatered sludge, when subject to incineration at a high temperature, undergoes a metamorphic change to become a hard cellular mass with low unit weight. After the incineration process, this hardened mass of sludge "ash" can be crushed to smaller size aggregates, which, when graded in suitable proportions, manifest the basic attributes required of lightweight aggregates. When used as aggregates in the production of lightweight concrete, experimental results showed that the resulting concrete satisfied the physical requirements of a lightweight concrete in terms of unit weight, strength, heat-insulating properties and fire resistance, thus indicating that sludge ash could be a potential source of suitable lightweight aggregates.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 7/8 PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON THE DESIGN AND CONSTRUCTION OF NON-CONVENTIONAL STRUCTURES Edited by: B.H.V. Topping Paper XX.2 Lightweight Concrete Made with Sludge Ash J-H. Tay and W-K. Yip School of Civil and structural Engineering, Nanyang Technological Institute, Singapore doi:10.4203/ccp.7.20.2 purchase the full-text of this paper Full Bibliographic Reference for this paper J-H. Tay, W-K. Yip, "Lightweight Concrete Made with Sludge Ash", in B.H.V. Topping, (Editor), "Proceedings of the International Conference on the Design and Construction of Non-Conventional Structures", Civil-Comp Press, Edinburgh, UK, pp 205-213, 1987. doi:10.4203/ccp.7.20.2 Abstract Sludge is an inevitable by-product of waste water treatment. Its abundance poses disposal problems which can be drastically reduced if sludge can be converted for economical uses in construction as substitute materials. Digested and dewatered sludge, when subject to incineration at a high temperature, undergoes a metamorphic change to become a hard cellular mass with low unit weight. After the incineration process, this hardened mass of sludge "ash" can be crushed to smaller size aggregates, which, when graded in suitable proportions, manifest the basic attributes required of lightweight aggregates. When used as aggregates in the production of lightweight concrete, experimental results showed that the resulting concrete satisfied the physical requirements of a lightweight concrete in terms of unit weight, strength, heat-insulating properties and fire resistance, thus indicating that sludge ash could be a potential source of suitable lightweight aggregates. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £78 +P&P)
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