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Buildings 2018, 8(11), 153; https://doi.org/10.3390/buildings8110153

Durability and Compressive Strength of High Cement Replacement Ratio Self-Consolidating Concrete

Department of Civil Engineering, Abu Dhabi University, Abu Dhabi 59911, UAE
Received: 27 September 2018 / Revised: 1 November 2018 / Accepted: 2 November 2018 / Published: 6 November 2018
(This article belongs to the Special Issue Green Building Materials)
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Abstract

This study examines durability and mechanical properties of sustainable self-consolidating concrete (SCC) in which 80% of the cement is replaced with combinations of recycled industrial by-products including fly ash, silica fume, and ground granulated blast furnace slag (GGBS). The water to binder (w/b) ratio of SCC mixes studies was maintained at 0.36. The study proposes empirical relationships to predict 28-day compressive strengths based on the results of three-day and seven-day compressive strengths. In addition, the chloride penetration resistance of the various sustainable SCC mixes was determined after three days, seven days, and 28 days of moist curing of concrete standards. It was concluded that fly ash, silica fume, and GGBS contribute favorably to enhancing strength development, fresh properties, and durability of SCC in comparison to ordinary Portland cement (OPC). The compressive strength of the sustainable SCC mixes falls within ranges suitable for structural engineering applications. Replacing cement with 15% silica fume produced a 28-day average compressive strength of 95.3 MPa, which is 44.2% higher than the control mix. Replacing cement with 15% or 20% silica fume reduced the chloride ion permeability to very low amounts compared to high permeability in a control mix. View Full-Text
Keywords: self-consolidating concrete; fly ash; silica fume; GGBS; compressive strength; sustainability self-consolidating concrete; fly ash; silica fume; GGBS; compressive strength; sustainability
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Mohamed, O. Durability and Compressive Strength of High Cement Replacement Ratio Self-Consolidating Concrete. Buildings 2018, 8, 153.

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