A gentle acid-wash and pre-coating treatment of coral aggregate to manufacture high-strength geopolymer concrete

Geopolymer concrete is proved to have high strength, lesser shrinkage, resistance against reinforcement corrosion, acid and sulphate resistance, freeze-thaw resistance, fire resistance and resistance to alkali-aggregate reaction. There are many parameters which influence the strength characteristics of Geopolymer Concrete. They are types and fineness of Source alumino silicate material used, concentration and type of alkaline activators used, curing temperature and curing time, utilization of M-sand etc. High performance characteristics could be achieved through the correct choice of these parameters. This review paper focuses on the influence of different variables on the properties of geopolymer concrete and the progress in the field of geopolymer concrete. Consequently many research papers pertaining to the geopolymer have been reviewed in this state of art paper.

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Review of Low to High Strength Alkali-Activated and Geopolymer Concrete

Lecture Notes in Civil Engineering - Recent Trends in Civil Engineering ◽

10.1007/978-981-15-8293-6_8 ◽

2020 ◽

pp. 105-113

Author(s):

Muralidhar V. Kamath ◽

Shreelaxmi Prashanth ◽

Mithesh Kumar

Keyword(s):

High Strength ◽

Geopolymer Concrete ◽

Alkali Activated

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An Ultrasonic Pulse Velocity Test on Fly-Ash Based Geopolymer Concrete in Frequency Domains

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.700.310 ◽

2014 ◽

Vol 700 ◽

pp. 310-313 ◽

Cited By ~ 1

Author(s):

Jee Sang Kim ◽

Tae Hong Kim

Keyword(s):

Compressive Strength ◽

Construction Material ◽

High Strength ◽

Ultrasonic Pulse Velocity ◽

Peak Frequency ◽

Ultrasonic Pulse ◽

Pulse Velocity ◽

P Wave ◽

Geopolymer Concrete ◽

Existing Structures

The Non-Destructive Test techniques on concrete, which can assess the properties of materials without damages, have been developed as the deteriorations of existing structures increase. Among them, the ultrasonic pulse velocity (USPV) method is widely used because it can investigate the states of one material for a long time and repeatedly. However, there have been few researches on the NDT application to geopolymer concrete which is environment friendly construction material without any cement. This paper investigates the variations of ultrasonic pulse velocity and peak frequency of geopolymer concrete under monotonically increasing loads to assess the material conditions with various compressive strength levels by measuring P-wave signals. The pulse velocities and peak frequencies were higher in high strength geopolymer concrete specimens. There are not explicit relations between strength levels and peak frequencies but the peak frequencies are strongly influenced by the applied stress levels. In addition, a predicting equation for compressive strength of geopolymer concrete is derived based on experimental data in similar form for normal concrete.

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Compression behavior and modeling of FRP-confined high strength geopolymer concrete

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.122759 ◽

2021 ◽

Vol 283 ◽

pp. 122759

Author(s):

Fahed Alrshoudi ◽

Husain Abbas ◽

Aref Abadel ◽

Abdulrahman Albidah ◽

Ali Altheeb ◽

...

Keyword(s):

High Strength ◽

Geopolymer Concrete ◽

Compression Behavior

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Shear Strength of Steel Fiber Reinforced Reactive Powder Concrete & Geopolymer Concrete – A Comparison

Proceedings of International Web Conference in Civil Engineering for a Sustainable Planet ◽

10.21467/proceedings.112.43 ◽

2021 ◽

Author(s):

Aravind S Kumar ◽

Bharati Raj J ◽

Keerthy M Simon

Keyword(s):

Shear Strength ◽

Steel Fiber ◽

Load Capacity ◽

High Strength ◽

Steel Fibers ◽

Reactive Powder Concrete ◽

Polymer Concrete ◽

Geopolymer Concrete ◽

Fiber Reinforced ◽

Reactive Powder

Reactive Powder Concrete (RPC) is an ultra-high strength concrete composite prepared by the replacement of natural aggregates with quartz powder, silica fume and steel fibers. The use of RPC yields high strength, high ductile concrete with optimized material use and contributes to economic, sustainable and ecofriendly constructions. Past research has indicated that RPC offers significant improvement in the mechanical and physical properties owing to its homogenous composition with less defects of voids and microcracks. This leads to enhancement of ultimate load capacity of RPC members and results in superior ductility, energy absorption, tensile strain-hardening behavior, crack control capability and durability. Geo-polymer concrete (GPC) is a type of concrete that is made by reacting aluminate and silicate bearing materials with a caustic activator. Usually, waste materials such as fly ash or slag from iron and metal production are used, which helps lead to a cleaner environment. This paper attempts to review the effect of steel fibers on the shear strength of steel fiber reinforced RPC and compare the results with those of geopolymer concrete.

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Domınance of materıal composıtıon on mechanıcal propertıes of normal and hıgh strength grade bınary blended geopolymer concrete

Technium: Romanian Journal of Applied Sciences and Technology ◽

10.47577/technium.v2i3.392 ◽

2020 ◽

Vol 2 (3) ◽

pp. 128-133

Author(s):

Addepalli Mallinadh Kashyap ◽

Tanimki Chandra Sekhar Rao ◽

N.V.Ramana Rao

Keyword(s):

Mechanical Properties ◽

Blast Furnace ◽

Fly Ash ◽

Blast Furnace Slag ◽

High Strength ◽

Geopolymer Concrete ◽

Green House Gases ◽

Green House ◽

Granulated Blast Furnace Slag ◽

Furnace Slag

The utilisation of pozzolanic materials as the replacement to conventional cement material have the potentiality to mitigate the pollution caused by the émission of carbon based green house gases which are a main source for global warming problem. For every production of 1 ton of cement it was approximated that the emission of carbon based green house gases are about 1 ton. Keeping this in view, a new material called Geopolymer which was first coined by Davidovits has gained a lot of interest by the researchers. In this study, different molarity variations of NaOH in the order of 4M, 6M, 8M, 10M, 12M and 14M and also the blending of mineral admixtures like Fly Ash and Ground Granulated Blast Furnace Slag with percentages (50%+50%) and the mechanical properties of normal M30 and high strength grade M70 binary blended Geopolymer concrete were studied after 28 days of ambient curing and were reported. The test results revealed that the effect of molar concentration of NaOH at 12 M is effective and the optimum replacement of mineral composition of source materials is (50%+50%) fly ash and ground granulated blast furnace slag.

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Geopolymer Concrete: A Sustainable and Economic Concrete via Experimental Analysis

10.21203/rs.3.rs-185150/v1 ◽

2021 ◽

Author(s):

Manvendra verma ◽

Nirendra Dev

Keyword(s):

Experimental Investigation ◽

Compressive Strength ◽

Poisson Ratio ◽

Physical And Mechanical Properties ◽

High Strength ◽

Embodied Energy ◽

Mix Design ◽

Geopolymer Concrete ◽

Concrete Mix ◽

The Cost

Abstract Geopolymer concrete is a sustainable, economical, eco-friendly, and high-strength concrete. The GPC utilizes industrial solid wastes like flyash and slag as binding material and is activated by the alkaline solution containing NaOH and Na2SiO3 in the design mix. The experimental investigation analyzes both GPC and OPC concrete's physical and mechanical properties for the same mix design and analyzes the concretes cost and sustainability. After the experimental investigation, the GPC and OPC concrete's compressive strength shows similar trends at the 28 days strength, but the initial three days strength of the GPC strength is much higher than the OPC concrete, but around 28 days, the compressive strength of concrete mix got similar. The splitting tensile strength and flexural strength of the GPC specimens are slightly higher than the OPC concrete mix specimens. The OPC concrete's elastic modulus is slightly higher than the GPC mix design, whereas the Poisson ratio of the OPC concrete is slightly lower than the GPC mix designs. The GPC has less embodied energy compared to the OPC concrete. The cost of the GPC at a bulk level reduced the cost of up to 40% of the OPC concrete.

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