Experimental Investigations on Strength and Durability of Alkali-Activated Binder-Treated Natural Jute Geotextile

This paper describes the experimental investigation carried out to develop the geopolymer concrete based on alkali-activated rice husk ash (RHA) by sodium hydroxide with sodium silicate. Effect on method of curing and concentration of NaOH on compressive strength as well as the optimum mix proportion of geopolymer mortar was investigated. It is possible to achieve compressive strengths of 31 N/mm2and 45 N/mm2, respectively for the 10 M alkali-activated geopolymer mortar after 7 and 28 days of casting when cured for 24 hours at 60°C. Results indicated that the increase in curing period and concentration of alkali activator increased the compressive strength. Durability studies were carried out in acid and sulfate media such as H2SO4, HCl, Na2SO4, and MgSO4environments and found that geopolymer concrete showed very less weight loss when compared to steam-cured mortar specimens. In addition, fluorescent optical microscopy and X-ray diffraction (XRD) studies have shown the formation of new peaks and enhanced the polymerization reaction which is responsible for strength development and hence RHA has great potential as a substitute for ordinary Portland cement concrete.

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Performance of alkali-activated binder-treated jute geotextile as reinforcement for subgrade stabilization

International Journal of Geotechnical Engineering ◽

10.1080/19386362.2018.1464272 ◽

2018 ◽

pp. 1-15 ◽

Cited By ~ 8

Author(s):

Shashank Gupta ◽

Anasua GuhaRay ◽

Arkamitra Kar ◽

V. P. Komaravolu

Keyword(s):

Subgrade Stabilization ◽

Alkali Activated ◽

Jute Geotextile

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Study on compressive strength and durability of alkali-activated coal gangue-slag concrete and its mechanism

Powder Technology ◽

10.1016/j.powtec.2020.04.054 ◽

2020 ◽

Vol 368 ◽

pp. 112-124 ◽

Cited By ~ 5

Author(s):

Hongqiang Ma ◽

Hongguang Zhu ◽

Chao Wu ◽

Hongyu Chen ◽

Jianwei Sun ◽

...

Keyword(s):

Compressive Strength ◽

Coal Gangue ◽

Activated Coal ◽

Strength And Durability ◽

Activated Coal Gangue ◽

Alkali Activated

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Investigation on Durability Properties of Self Compacting Concrete with Mineral Admixtures

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d5017.119420 ◽

2020 ◽

Vol 9 (4) ◽

pp. 388-396

Keyword(s):

Salt Water ◽

Research Work ◽

Resistance Test ◽

Limestone Powder ◽

Mineral Admixtures ◽

Experimental Investigations ◽

Filler Materials ◽

Self Compacting Concrete ◽

Durability Properties ◽

Strength And Durability

Self-Compacting Concrete (SCC) or Self Consolidating Concrete is the present-day concrete that is being adopted the world over. The production of SCC involves the selection of appropriate materials and good quality control which is essential for the durability of concrete. The mineral admixtures and filler materials provide additional reduction to the porosity of the concrete. The primary objective of the present research work is to carry out the experimental investigations on durability properties of SCC with 20 different mix proportions, containing various percentages of filler materials like Limestone Powder (LP) and Marble Powder (MP), along with the mineral admixtures like Fly ash (F) and Silica Fume (SF). Experimental investigation on the durability properties for all the 20 mixes of SCC was carried out by conducting the Rapid Chloride Penetration Test (RCPT), Saturated Water Absorption Test, Acid Resistance Test, Sulphate Resistance Test, Water Permeability Test and Salt Water Resistance Test. From the experimental study, it is observed that the SCC mix with equal proportions F (10%), SF (10%), LP (10%) and MP (10%), exhibit better performance than the control mix in terms of strength and durability characteristics and thus it is concluded that the addition of mineral admixtures and filler materials have a pivotal role in the development of strength and durability aspects of SCC.

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Influence of Water Content on Mechanical Strength and Microstructure of Alkali-Activated Fly Ash/GGBFS Mortars Cured at Cold and Polar Regions

Materials ◽

10.3390/ma13010138 ◽

2019 ◽

Vol 13 (1) ◽

pp. 138 ◽

Cited By ~ 4

Author(s):

Xiaobin Wei ◽

Feng Ming ◽

Dongqing Li ◽

Lei Chen ◽

Yuhang Liu

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Water Content ◽

Negative Temperature ◽

Polar Regions ◽

Uniaxial Compression Strength ◽

Influence Of Water ◽

Strength And Durability ◽

Alkali Activated Binders ◽

Alkali Activated

Negative temperature curing is a very harmful factor for geopolymer mortar or concrete, which will decrease the strength and durability. The water in the geopolymer mixture may be frozen into ice, and the water content is a crucial factor. The purpose of this paper is to explore the influence of water content on the properties of alkali-activated binders mortar cured at −5 °C. Fly ash (FA) and ground granulated blast furnace slag (GGBFS) were used as binders. Three groups of experiments with different water content were carried out. The prepared samples were investigated through uniaxial compression strength test, Scanning electron microscopy (SEM), and X-ray diffraction (XRD) for the determination of their compressive strength, microstructural features, phase, and composition. The results indicated that, the compressive strength of samples basically maintained 25.78 MPa–27.10 MPa at an age of 28 days; for 90 days, the values reached 33.4 MPa–34.04 MPa. The results showed that lower water content is beneficial to improving the early strength of mortar at −5 °C curing condition, while it has little impact on long-term strength. These results may provide references for the design and construction of geopolymer concrete in cold regions.

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Experimental Investigations on Alkali-Activated Slag Cementitious Material

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.672-674.1823 ◽

2014 ◽

Vol 672-674 ◽

pp. 1823-1827

Author(s):

Xiao Wei Sun ◽

Wan Yang Niu ◽

Ling Ling Wang

Keyword(s):

Water Glass ◽

Setting Time ◽

Cementitious Material ◽

Curing Temperature ◽

Experimental Investigations ◽

Strength Increase ◽

Curing Conditions ◽

Alkali Activated Slag ◽

Activated Slag ◽

Alkali Activated

These are many factors that can influence the properties of alkali-activated slag cementitious material, such as the modulus and content of water glass, water-cement ratio, curing conditions, and so forth. The rules that how these factors affect setting time and strength of the material are systematically discussed in the paper. It is found that the setting time of the material depends on the concentration of alkaline ions in solution; The material will have the best strength when the modulus and content of water glass are 1.4 and 8%, respectively. The curing temperature increase will be helpful to compressive strength increase.

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Compressive Strength and Durability Properties of Structural Lightweight Concrete with Fine Expanded Glass and/or Clay Aggregates

Materials ◽

10.3390/ma11122434 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2434 ◽

Cited By ~ 10

Author(s):

Deividas Rumsys ◽

Edmundas Spudulis ◽

Darius Bacinskas ◽

Gintaris Kaklauskas

Keyword(s):

Compressive Strength ◽

Lightweight Concrete ◽

Experimental Studies ◽

Experimental Investigations ◽

Lightweight Aggregates ◽

Durability Properties ◽

Concrete Mixtures ◽

Glass Aggregate ◽

Strength And Durability ◽

Clay Aggregates

This study is focused on the experimental investigation of compressive strength and durability properties of lightweight concrete mixtures with fine expanded glass and expanded clay aggregates using different microfillers. The paper proposes the relationships between the compressive strength and density of concrete mixtures with different proportions of the lightweight aggregates mentioned above. The performed experimental studies have revealed the tendencies of possible usage of different amounts of fine lightweight aggregates and their combinations in the production of concrete mixtures depending on the demands of practical application. Following the requirements for structural concrete subjected to environmental effects, durability properties (alkaline corrosion and freeze–thaw resistance) of the selected concrete mixtures with expanded glass aggregate were studied. The results of the experimental investigations have shown that durability of tested concrete specimens was sufficient. The study has concluded that the mixtures under consideration can be applied for the production of structural elements to which durability requirements are significant.

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