Development of High Volume Fly Ash Concrete Incorporating Steel Fibre

Concrete is most frequently used composite material. Concrete is homogeneous mix of fine aggregate, Coarse aggregate and binding medium of concrete paste .Due to `high demand of cement Co2 emission is very high, It leads to global warming. So in this project high volume fly ash concrete was incorporated. Fly ash is the waste material obtained from thermal power plant. In this paper we investigated about high volume fly ash in different percentage of replacement 55, 60, 75 percentage. Layered pavement is incorporated with Steel fiber in a different aspect ratio (15, 30, 40).layered pavement will give good thermal expansive properties. By varying fly ash content and Steel fibers Aspect ratio of different mixes were arrived hardened properties of these nine mixes were arrived such as Compression test, Split tensile test and Flexural test.

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Investigation on behavior of high-volume fly ash concrete made with fine aggregate replaced by steel slag

Materials Today Proceedings ◽

10.1016/j.matpr.2020.10.514 ◽

2020 ◽

Author(s):

S. Naveen Kumar ◽

M. Natarajan ◽

V. Karthik ◽

V. Johnpaul

Keyword(s):

Fly Ash ◽

Steel Slag ◽

High Volume ◽

Fine Aggregate ◽

Fly Ash Concrete ◽

High Volume Fly Ash

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Effect of Nano Iron Oxide on Strength and Durability Characteristics of High Volume Fly Ash Concrete for Pavement Construction

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b3167.078219 ◽

2019 ◽

Vol 8 (2) ◽

pp. 4365-4373

Keyword(s):

Iron Oxide ◽

Fly Ash ◽

Thermal Power ◽

High Volume ◽

Scale Production ◽

Cement Concrete ◽

Fly Ash Concrete ◽

Rigid Pavements ◽

High Volume Fly Ash ◽

Strength And Durability

Cement is the principal component of cement concrete used for construction of rigid pavements and is produced by an energy intensive process. Large scale production and its subsequent utilization detrimentally contributes towards global warming. In order to cater for sustainable development, there is a need to utilize waste materials having cementitious properties as a partial substitute for cement. Fly ash is one of such waste which is being extensively used for the production of cement concrete. Concrete produced by utilizing fly ash more than fifty percent of cement is termed as high volume fly ash concrete (HVFAC). Although HVFAC facilitates utilization of large volume of fly ash, it however has the disadvantage of delayed gain in strength which limits its usage as pavement quality concrete (PQC). Contemporary literatures show the usage of various types of nanomaterials to overcome this disadvantage. The present study was carried out to investigate the influence of nano iron oxide on strength and durability properties of HVFAC. The HVFAC used in the study was prepared by replacement of fifty five percent ordinary Portland cement with F-type fly ash obtained from thermal power plant. Nano iron oxide was utilized in different percentages to improve the strength and durability characteristics of HVFAC. The strength properties of the concrete was evaluated by flexural, compressive and split tensile strength tests, whereas the durability characteristics were evaluated by density, permeability, sorptivity, ultrasonic pulse velocity and rapid chloride penetration tests. The tests were carried out at 28, 56 and 90 days age of concrete. The test result showed that HVFAC modified with 0.75% nano iron oxide by weight gave the optimal strength and durability results which were comparable with that of normal cement concrete used for construction of rigid pavements.

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Processed bottom ash for replacing fine aggregate in making high-volume fly ash concrete

MATEC Web of Conferences ◽

10.1051/matecconf/201713801006 ◽

2017 ◽

Vol 138 ◽

pp. 01006 ◽

Cited By ~ 1

Author(s):

Antoni ◽

Aldi Vincent Sulistio ◽

Samuel Wahjudi ◽

Djwantoro Hardjito ◽

Djwantoro Hardjito

Keyword(s):

Fly Ash ◽

Bottom Ash ◽

High Volume ◽

Fine Aggregate ◽

Fly Ash Concrete ◽

High Volume Fly Ash

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Effects of the Loss on Ignition of Fly Ash on the Properties of High-Volume Fly Ash Concrete

Sustainability ◽

10.3390/su11092704 ◽

2019 ◽

Vol 11 (9) ◽

pp. 2704 ◽

Cited By ~ 5

Author(s):

How-Ji Chen ◽

Neng-Hao Shih ◽

Chung-Hao Wu ◽

Shu-Ken Lin

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Modulus Of Elasticity ◽

High Volume ◽

Cementitious Materials ◽

Hardened Concrete ◽

Fine Aggregate ◽

Loss On Ignition ◽

High Volume Fly Ash ◽

Hardened Properties

This study presents the experimental results of fresh and hardened properties of concrete incorporating high-volume fly ash (HVFA). Two kinds of low-calcium fly ash with loss on ignition (LOI) of 5% and 8% were used as replacement for cement and/or fine aggregate of 0% (control), 20%, 40%, 50%, 60% and 80% by weight of the total cementitious materials. The properties of fresh concrete tested included the slump, air content, unit weight and setting time; those of hardened concrete determined included compressive strength, modulus of elasticity, flexural strength and drying shrinkage. Test results indicate that the concretes made with high-LOI (8%) fly ash can be successfully produced for structural concrete, which contains fly ash of up to 60% of the total cementitious materials. The high-LOI fly ash-concretes with higher replacement levels presented longer setting times. However, although both the fresh and hardened properties of high LOI fly ash concretes were inferior to those of the low-LOI (5%) fly ash concretes, the high modulus of elasticity, the adequate strength development characteristics both at early and later ages (up to 365 days) and the low dry shrinkage were observed when compared to those of the control concrete with a comparable 28-day compressive strength of 30 MPa.

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