Properties of alkaliactivated concrete (

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Properties of alkali-activated concrete (AAC ...

2021-7-15  mechanical properties of geopolymer concrete having denser paste structure with the absence of calcium hydroxide. There are limited studies pertaining to the use of concrete and brick waste as replacement to natural aggregates in alkali-activated concrete. Particularly, its potential to replace

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Mechanical properties of alkali-activated concrete: A ...

2016-11-30  Dynamic mechanical properties of alkali-activated concrete. The strain rate effect on materials, induced by high-amplitude short-duration loads, is identified as an important dynamic property. Compared to the limited research on the strain rate effect of AAC, extensive studies have been conducted on OPCC.

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Alkali-activated concrete: Engineering properties and ...

Alkali-activated concrete: Engineering properties and stress–strain behavior Robert J. Thomas, Sulapha Peethamparan⇑ Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USA. highlights. The engineering properties of alkali-activated concretes (AAC) are determined.

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MPA : Mechanical properties of alkali-activated concrete

As the chemical composition of alkali-activated concrete differs from that of conventional concrete, and also differs substantially from one mixture to another because of different precursors and alkaline solutions used, the bond behavior, the strength gain and time dependent properties in conventional concrete and alkali-activated concrete are ...

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Properties of alkali-activated mortar and concrete using ...

2009-4-23  The compressive strength of AA concrete, however, sharply decreased when the replacement level of lightweight fine aggregates exceeded 30%. In particular, the increase in the discontinuous grading of lightweight aggregate resulted in the deterioration of the mechanical properties of AA concrete.

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(PDF) Properties of alkali-activated mortar and concrete ...

The compressive strength of AA concrete, however, sharply decreased when the replacement level of lightweight fine aggregates exceeded 30%. In particular, the increase in the discontinuous grading...

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Properties and Durability of Alkali-Activated Slag Concrete

1992-9-1  Properties and Durability of Alkali-Activated Slag Concrete Formulates the proportioning of concrete mixes made with ground granulated blast furnace slag activated with sodium silicate, and determines their properties an

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Properties and sustainability of alkali-activated slag ...

2014-4-1  Ground granulated blast-furnace slag (GGBS) was activated using the following three types of alkali activators: 10% Ca (OH) 2 and 4% Mg (NO 3) 2, 5% Ca (OH) 2 and 6.5% Na 2 SiO 3, and 2.5% Ca (OH) 2 and 6.5% Na 2 SiO 3. The unit binder content varied in

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Carbonation-induced properties of alkali-activated cement ...

This study evaluates the carbonation-induced properties of low to high calcium-based one-part alkali-activated cements (AACs) as an alternative to Portland oil well cement under reservoir conditions.

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Thermal and mechanical properties of alkali-activated slag ...

2018-1-20  Different properties of geopolymers and geopolymer composites (mortar and concrete) exposed to elevated temperature have been investigated by several research groups, e.g., the effects of ductility and transit creep on residual strength , , , the residual strength of alkali-activated slag concrete , the spalling behaviour of geopolymer and ...

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Alkali-activated concrete: Engineering properties and ...

Alkali-activated concrete: Engineering properties and stress–strain behavior Robert J. Thomas, Sulapha Peethamparan⇑ Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USA. highlights. The engineering properties of alkali-activated concretes (AAC) are determined.

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Mechanical Properties of Alkali-Activated Concrete ...

Drop-weight tests are conducted to study the dynamic flexural properties of alkali-activated concrete (AAC) under four different impact velocities, corresponding to strain rates of 15, 35, 55, and 75 s − 1.The effect of low temperature (− 30 ° C) is also observed at the strain rate of 35 s − 1.The replacement ratio of fly ash with slag, alkali concentration, modulus of alkali activator ...

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Preparation and Properties of Alkali-Activated Ground ...

2020-10-13  3.1 Compressive strength of alkali-activated GGBFS concrete Figure 1 shows the compressive strength of alkali-activated GGBFS concrete specimens G0F, G10F, G20F, and G30F with graphite aggregate content of 0, 10%, 20%, and 30%, respectively, at 3, 7, and 28 days. Early strength of alkali-activated GGBFS concrete developed quickly.

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Engineering Properties of Alkali-Activated ... - Concrete

2011-1-1  The development of alkali-activated binders with superior engineering properties and longer durability has emerged as an alternative to ordinary portland cement (OPC). It is possible to use alkali-activated natural pozzolans to prepare environmentally friendly geopolymer cement leading to the concept of sustainable development.

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Properties of alkali-activated mortar and concrete using ...

2009-4-23  This study reports the testing of 12 alkali-activated (AA) mortars and six AA concretes using lightweight aggregates. These tests aimed to explore the significance and limitations of the development of lightweight AA mortar and concrete. Ground granulated blast-furnace slag, which was used as source material, was activated by sodium silicate powder.

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(PDF) Properties of alkali-activated mortar and concrete ...

properties of alkali-activated slag concrete containing. porous coarse aggregate. Cem Concr Res 29(4):607–610. doi: 10.1016/S0008-8846(98)00203-8. 9. Neville AM (1995) Properties of concrete.

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Creep and Long-Term Properties of Alkali-Activated Swedish ...

2021-8-2  Alkali-activated concrete based on a combination of fly ash and BFS showed a lower creep than the comparable PC concrete when cured in ambient laboratory conditions, and a higher creep when sealed , while the long-term creep of concretes based on AAS tends to be higher in comparison with PC concretes (Ma and Dehn 2017).

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Material Properties of Structurally Viable Alkali ...

Material Properties of Structurally Viable Alkali-Activated Fly Ash Concrete ... and material properties of alkali-activated fly ash concrete were evaluated to verify the material’s performance and structural viability. Results show that the heat-cured products of reaction of fly ash in an aqueous alkaline solution form a concrete binder with ...

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Carbonation-induced properties of alkali-activated cement ...

This study evaluates the carbonation-induced properties of low to high calcium-based one-part alkali-activated cements (AACs) as an alternative to Portland oil well cement under reservoir conditions.

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Alkali-activated concrete TU Delft Repositories

Alkali-activated concrete: development of material properties (strength and stiffness) and flexural behaviour of reinforced beams over time. Author. Prinsse, Silke (TU Delft Civil Engineering and Geosciences; TU Delft Engineering Structures) Contributor. Lukovic, Mladena (mentor) Hordijk, Dick (graduation committee) Ye, Guang (graduation committee)

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Mechanical Properties of Alkali-Activated Concrete ...

Drop-weight tests are conducted to study the dynamic flexural properties of alkali-activated concrete (AAC) under four different impact velocities, corresponding to strain rates of 15, 35, 55, and 75 s − 1.The effect of low temperature (− 30 ° C) is also observed at the strain rate of 35 s − 1.The replacement ratio of fly ash with slag, alkali concentration, modulus of alkali activator ...

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Properties of Alkali Activated Slag Concrete Incorporating ...

Alkali activated slag (AAS) has gained huge attention in recent years due to its ability to replace ordinary Portland cement (OPC) as a binder in concrete. A need to replace OPC is imminent due to the high carbon dioxide emitted into the environment during its production. However, the use of this type of binder did not eliminate the huge strain placed on the deposit of natural resources.

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Preparation and Properties of Alkali-Activated Ground ...

2020-10-13  3.1 Compressive strength of alkali-activated GGBFS concrete Figure 1 shows the compressive strength of alkali-activated GGBFS concrete specimens G0F, G10F, G20F, and G30F with graphite aggregate content of 0, 10%, 20%, and 30%, respectively, at 3, 7, and 28 days. Early strength of alkali-activated GGBFS concrete developed quickly.

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(PDF) Properties of alkali-activated mortar and concrete ...

properties of alkali-activated slag concrete containing. porous coarse aggregate. Cem Concr Res 29(4):607–610. doi: 10.1016/S0008-8846(98)00203-8. 9. Neville AM (1995) Properties of concrete.

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Fracture properties of slag-based alkali-activated ...

Fracture behavior of alkali-activated seawater coral aggregate concrete (AACAC) was characterized. Three-point bending tests were conducted on notched CAC and AACAC beams. Increasing the a0 / H ratio impeded the crack propagation and enhanced the brittleness of AACAC. An increased concrete strength improved the fracture load but raised the ...

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Properties of a Lightweight Fly Ash Slag Alkali-Activated ...

Properties of a Lightweight Fly Ash–Slag Alkali-Activated Concrete with Three Strength Grades Huailiang Wang 1,2 , Yuhui Wu 1 , Lang Wang 1 , Huihua Chen 3 and Baoquan Cheng 3,4, *

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Carbonation-induced properties of alkali-activated cement ...

This study evaluates the carbonation-induced properties of low to high calcium-based one-part alkali-activated cements (AACs) as an alternative to Portland oil well cement under reservoir conditions.

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Engineering Properties of Ambient Cured Alkali-Activated ...

The stress–strain response of alkali-activated slag–fly ash concrete mixes changed from brittle to ductile by the addition of steel fibers. Significant improvements in the mechanical properties of alkali-activated slag–fly ash concrete were observed for the addition of 2% by volume of all three types of steel fiber.

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Effects of Fly Ash on the properties of Alkali Activated ...

2017-6-1  This master thesis presents the effects of fly ash on the properties of alkali activated slag concrete, com-monly referred as Geopolymer concrete (GPC). Cement manufacturer are major producers of CO 2 which negatively affects the environment. Due to the increased construction activities and environmental con-

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Performance of Coconut Shell Alkali-Activated Concrete ...

2020-3-7  Neville A (2012) Properties of concrete - 5th Edition. 21. Awoyera P and Adesina A (2019) A critical review on application of alkali activated slag as a sustainable composite binder, Case Stud. Constr. Mater. 22.

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