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Properties of Controlled Low Strength Material with Circulating Fluidized Bed Combustion Ash and Recycled Aggregates

1
Department of Civil Engineering, National Ilan University, No.1, Sec. 1, Shennong Rd., I-Lan 260, Taiwan
2
Physics Division, Tatung University, No.40, Sec. 3, Zhongshan N. Rd., Taipei 104, Taiwan
3
Institute of Engineering Management, College of Engineering, Tatung University, No.40, Sec. 3, Zhongshan N. Rd., Taipei 104, Taiwan
*
Author to whom correspondence should be addressed.
Materials 2018, 11(5), 715; https://doi.org/10.3390/ma11050715
Received: 1 March 2018 / Revised: 28 April 2018 / Accepted: 29 April 2018 / Published: 2 May 2018
(This article belongs to the Special Issue Selected Papers from IMETI2016)
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Abstract

This study aims to investigate the effect of adding circulating fluidized bed combustion (CFBC) ash, desulfurization slag, air-cooled blast-furnace slag and coal bottom ash to the controlled low-strength material (CLSM). Test methods include slump flow test, ball drop test, water soluble chloride ion content measurement, compressive strength and length change measurement. The results show that (1) the use of CFBC hydration ash with desulfurization slag of slump flow is the best, and the use of CFBC hydration ash with coal bottom ash and slump flow is the worst; (2) CFBC hydration ash with desulfurization slag and chloride ion content is the highest; (3) 24 h ball drop test (diameter ≤ 76 mm), and test results are 70 mm to 76 mm; (4) CFBC hydration ash with desulfurization slag and compression strength is the highest, with the coal bottom ash being the lowest; increase of CFBC hydration ash can reduce compressive strength; and (5) the water-quenched blast furnace slag and CFBC hydration ash would expand, which results in length changes of CLSM specimens. View Full-Text
Keywords: CFBC ash; CLSM; slag; green materials CFBC ash; CLSM; slag; green materials
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Lin, W.-T.; Weng, T.-L.; Cheng, A.; Chao, S.-J.; Hsu, H.-M. Properties of Controlled Low Strength Material with Circulating Fluidized Bed Combustion Ash and Recycled Aggregates. Materials 2018, 11, 715.

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