Bharat Bhushan Jindal ¹, Dhirendra Singhal ², Sanjay K. Sharma ³, Parveen ²

Affiliations
1 I. K. Gujral Punjab Technical University, Kapurthala – 144603, Punjab, IN
2 Department of Civil Engineering, DCRUST Murthal, Sonipat – 131039, Haryana, IN
3 Department of Civil Engineering, NITTTR, Chandigarh-160036, Punjab, IN

Abstract

Objective:To develop geopolymer concrete (GPC) using 100% industrial waste as a binder at ambient temperature. Methods/Analysis:The low calcium fly ash based GPC was prepared with different percentage (0%,5%, and 10%) of alccofine and fly ash content (350,370,400kg/m3), to examine the fresh and hardened properties of alccofine activated GPC like density, workability, water absorption, permeable voids, water permeability, compressive and split tensile strengths using international standards. Nine mixes were prepared and investigated by X-ray diffraction (XRD) and Scanning electron microscopy (SEM) for the determination of their phase, composition and microstructural properties. Findings: The result shows that alccofine enhances the mechanical properties and significantly reduces the transport properties of GPC. Furthermore, GPC specimens prepared with alccofine emerge to improve the densification process. The results of investigations conducted reveal that higher percentage of alccofine and fly ash content has a significant effect on the polymerisation of the GPC, which in turn improves the strength and microstructural features. A maximum compressive strength of 42 MPa is achieved with 10% alccofine without elevated heat curing. Novelty/Improvement:Alccofine plays a significant role in improving the mechanical and transport properties of low calcium fly ash based geopolymer concrete at ambient conditions providing as an alternative to heat cured GPC.

Keywords

Concrete, Geopolymer, Microstructure,Permeability, Split Tensile Strength, Water Absorption.

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Parveen ¹, Dhirendra Singhal ¹, Atul Garg ¹

Affiliations
1 CED, DCRUST, Murthal – 131039, Haryana, IN

Abstract

An attempt has been made in this study to investigate the properties of geopolymer concrete while in the fresh state. Fresh properties of geopolymer cement have been studied by varying concentration of sodium hydroxide (NaOH) having concentration 8M, 10M, and 14M. Further, the ratio of Na2SiO3 to NaOH was kept in the range of 1, 1.5 and 2.5. It has been found that standard consistency decreased significantly and initial and final setting times decreased as the salt concentration of the alkaline solution and of NaOH increased. The compressive strength of geopolymer cement increased with the increase in the concentration of NaOH and with the increase in the concentration of sodium hydroxide. The compressive strength was even higher than conventional concrete at the concentration of 14M.

Keywords

Activator Solution, Compressive Strength, Fly Ash, Geopolymer

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