Experimental investigation on fresh and hardened properties of geopolymer concrete blended with recycled concrete aggregate
By: Kanagaraj, Balamurali
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Contributor(s): Anand N.
Publisher: Thane ACC LTD 2022Edition: Vol.96(1), Jan.Description: 29-41p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: Geopolymer concrete (GPC) is a sustainable construction material developed from industrial waste products which eliminates the use of cement. Recycling the concrete waste for the development of GPC can satisfy the goals of this sustainable development. Appropriate trials were performed to accomplish a perfect blend of the binder, alkali activator (AA), alkaline liquid to binder ratio and aggregates to develop the GPC. Three types of curing methods namely ambient, sunlight and oven were used for the development of the GPC mixes. This investigation focuses on the assessment of mechanical properties and the microstructure characterization of GPC developed with Natural and Recycled Concrete Aggregates. Fly ash-ground granulated blast furnace slag (FA-GGBS) based recycled concrete aggregate (RCA) blended GPC achieves similar strength to that of GPC blended with Natural coarse aggregate (CA) but with marginal differences. Among all the types of curing, heat cured specimens show higher strength. It is observed that temperature influences the development of early strength gain of GPC with both Natural and Recycled Concrete Aggregate. Increase in AA ratio decreases the workability and increases the strength of GPC mixes. GPC specimens with AA ratio of 1:5 that were cured under ambient condition exhibited minimal strength while GPC mixes with AA ratio of 2.5, showed maximum strength under oven curing condition.
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2022-1975 |
Geopolymer concrete (GPC) is a sustainable construction material developed from industrial waste products which eliminates the use of cement. Recycling the concrete waste for the development of GPC can satisfy the goals of this sustainable development. Appropriate trials were performed to accomplish a perfect blend of the binder, alkali activator (AA), alkaline liquid to binder ratio and aggregates to develop the GPC. Three types of curing methods namely ambient, sunlight and oven were used for the development of the GPC mixes. This investigation focuses on the assessment of mechanical properties and the microstructure characterization of GPC developed with Natural and Recycled Concrete Aggregates. Fly ash-ground granulated blast furnace slag (FA-GGBS) based recycled concrete aggregate (RCA) blended GPC achieves similar strength to that of GPC blended with Natural coarse aggregate (CA) but with marginal differences. Among all the types of curing, heat cured specimens show higher strength. It is observed that temperature influences the development of early strength gain of GPC with both Natural and Recycled Concrete Aggregate. Increase in AA ratio decreases the workability and increases the strength of GPC mixes. GPC specimens with AA ratio of 1:5 that were cured under ambient condition exhibited minimal strength while GPC mixes with AA ratio of 2.5, showed maximum strength under oven curing condition.
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