Performance of alkali-activated slag-based concrete with partial replacement of fine aggregate by Used Foundry Sand

One of the highest shortages of alkali-activated slag (AAS) is high shrinkage, both autogenous and drying. One of the possibilities of lowering the shrinkage is partial replacement of slag by suitable admixtures, which can act for example through the forming of expansive hydration products. In this study, 0–50 % of slag was replaced by by-pass cement kiln dust and fluidized bed combustion fly ash. Promising results were obtained especially in the case of fly ash. By using admixtures at higher dosages compressive strengths were reduced.

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Chloride Resistance of Alkali Activated Slag Pastes with Fly Ash Replacement

Materials Science Forum ◽

10.4028/www.scientific.net/msf.851.98 ◽

2016 ◽

Vol 851 ◽

pp. 98-103

Author(s):

Ladislav Pařízek ◽

Vlastimil Bílek Jr. ◽

Matěj Březina

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Raw Materials ◽

High Energy ◽

Partial Replacement ◽

Alkali Activated Slag ◽

Practical Applications ◽

Chloride Resistance ◽

Activated Slag ◽

Alkali Activated

High energy requirements due to producing of Portland cement leads to a tendency to use secondary raw materials or completely new kind of materials. One of the possibilities is using the materials based on alkali activated slag (AAS). In this paper the influence of partial replacement of ground granulated blast furnace slag by fly ash in AAS pastes on mechanical properties and porosity of was investigated. For practical applications it is also necessary to know their resistance to environment such as salty water. Chloride resistance was investigated by setting the experiment as external chloride attack and measuring the changes of mechanical properties, porosity and composition of the pastes.

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Alkali activated slag/fly ash concrete incorporating precious slag as fine aggregate for rigid pavements

Journal of Traffic and Transportation Engineering (English Edition) ◽

10.1016/j.jtte.2021.05.001 ◽

2021 ◽

Author(s):

Avinash Talkeri ◽

A.U. Ravi Shankar

Keyword(s):

Fly Ash ◽

Fine Aggregate ◽

Alkali Activated Slag ◽

Fly Ash Concrete ◽

Rigid Pavements ◽

Activated Slag ◽

Alkali Activated

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Flexural Fatigue performance of Alkali Activated Slag Concrete mixes incorporating Copper Slag as Fine Aggregate

Selected Scientific Papers - Journal of Civil Engineering ◽

10.1515/sspjce-2015-0001 ◽

2015 ◽

Vol 10 (1) ◽

pp. 7-18 ◽

Cited By ~ 2

Author(s):

B.M. Mithun ◽

M.C. Narasimhan ◽

Palankar Nitendra ◽

A.U. Ravishankar

Keyword(s):

Mechanical Properties ◽

Plain Concrete ◽

Copper Slag ◽

Fatigue Performance ◽

Fine Aggregate ◽

River Sand ◽

Alkali Activated Slag ◽

Fine Aggregates ◽

Activated Slag ◽

Alkali Activated

Abstract The present investigation attempts a detailed study of mechanical properties and fatigue characteristics of a new class of Alkali Activated Slag Concrete (AASC) mixes incorporating Copper Slag (CS) as fine aggregates. The natural river sand is replaced with Copper Slag, upto 100% (by volume) as fine aggregate in these AASC mixes. The behavior of plain concrete prisms, cast with this range of AASC mixes under dynamic cyclic loads with sand/CS fine aggregates is studied and is compared with conventional OPC-based concrete specimens. The results indicate that incorporation of CS even upto 100% as fine aggregates, did not have any adverse effects on the mechanical properties of AASC mixes. The AASC mixes with CS displayed slightly better fatigue performance as compared to AASC mix with river sand. An attempt is also made herein to statistically describe the fatigue life data of AASC mixes using a 2-parameter Weibull distribution.

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