Kogbara, Reginald B. ORCID: https://orcid.org/0000-0002-0227-4676, Al-Zubi, Abdelrahman and Masad, Eyad A. (2024) Dataset on early-age strength of ambient-cured geopolymer mortars from waste concrete and bricks with different alkaline activators. Data in Brief, 56:110800. ISSN 2352-3409 (Online) (doi:10.1016/j.dib.2024.110800)

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Abstract

The dataset presented here emanates from preliminary studies that compared the early-age compressive strengths of geopolymer mortars produced from construction and demolition wastes (CDW) commonly found in Qatar using different alkaline activators. Waste concrete, waste bricks and steel slag were used as aluminosilicate sources for the geopolymer mortars. Waste concrete was used as fine aggregate (75 μm to 4 mm), while solid or hollow red clay bricks were used together with steel slag as aluminosilicate powders. Solid red clay brick (75 μm to 1.4 mm) was also considered as fine aggregate. Different alkaline activators including solid powder or ground pellet forms of Ca(OH)2, CaO, and Ca(OH)2-NaOH, NaOH-CaCO3 and Na2SiO3-Na2CO3-Ca(OH)2 mixtures were employed by just adding water. Both solid powder Ca(OH)2 and viscous solutions of NaOH and
NaOH-Na2SiO3 were also considered as alkaline activators.
The geopolymer mortars included small amounts of some other additives such as gypsum, microsilica and aluminium sulfate to enhance the geopolymerization and hydration process. Random proportions of the materials were employed in the range-finding experiments, and the mortars produced were tested for compressive strength. The dataset shows the
7-day compressive strengths and densities of the 40 mixtures
tested with mostly ambient temperature (20°C) curing. It also
shows such data for mixtures in which variables such as curing at 40°C, mixing with hot water at 50 - 60°C temperature,
grading of waste concrete aggregates, and collective grinding of the powdered materials were considered. The data indicates possible early-age compressive strengths of different
geopolymer mortar mixture designs and the materials and
mixture design methods that can be used to achieve desired
early-age strengths from waste concrete and bricks.

Item Type:	Article
Uncontrolled Keywords:	alkali-activated mortar, brick waste, compressive strength, concrete waste, early-age strength, one-part geopolymer, solid-powder alkaline activator
Subjects:	Q Science > Q Science (General) Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	19 Aug 2024 15:58
URI:	http://gala.gre.ac.uk/id/eprint/47705

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