Experimental Investigation on Geopolymer Concrete with Various Sustainable Mineral Ashes

Subash, N.; Avudaiappan, Siva; Kumar, Sunil; Amran, Mugahed; Vatin, Nikolai; Fediuk, Roman; Aepuru, Radhamanohar

doi:10.3390/ma14247596

Cited by 19 publications

(6 citation statements)

References 51 publications

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“…Thus, the analysis of the results suggests the possibility of using waste milled for 10 min as an active mineral additive, as well as to give better formability to the mixture and its micro-reinforcement to obtain fiber-reinforced concrete [ 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. The presence of quartz in the amorphous phase causes high solubility in saturated alkaline solutions of the hydrated binder and active interaction with Ca(OH) 2 released as a result of the hydration of clinker minerals.…”

Section: Resultsmentioning

confidence: 99%

Technogenic Fiber Wastes for Optimizing Concrete

et al. 2022

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A promising method of obtaining mineral fiber fillers for dry building mixtures is the processing of waste that comes from the production of technogenic fibrous materials (TFM). The novelty of the work lies in the fact that, for the first time, basalt production wastes were studied not only as reinforcing components, but also as binder ones involved in concrete structure formation. The purpose of the article is to study the physical and mechanical properties of waste technogenic fibrous materials as additives for optimizing the composition of raw concrete mixes. To assess the possibility of using wastes from the complex processing of TFM that were ground for 5 and 10 min as an active mineral additive to concrete, their chemical, mineralogical, and granulometric compositions, as well as the microstructure and physical and mechanical characteristics of the created concretes, were studied. It is established that the grinding of TFM for 10 min leads to the grinding of not only fibers, but also pellets, the fragments of which are noticeable in the total mass of the substance. The presence of quartz in the amorphous phase of TFM makes it possible to synthesize low-basic calcium silicate hydrates in a targeted manner. At 90 days age, at 10–20% of the content of TFM, the strength indicators increase (above 40 MPa), and at 30% of the additive content, they approach the values of the control composition without additives (above 35 MPa). For all ages, the ratio of flexural and compressive strengths is at the level of 0.2, which characterizes a high reinforcing effect. Analysis of the results suggests the possibility of using waste milled for 10 min as an active mineral additive, as well as to give better formability to the mixture and its micro-reinforcement to obtain fiber-reinforced concrete.

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Section: Resultsmentioning

confidence: 99%

Technogenic Fiber Wastes for Optimizing Concrete

et al. 2022

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“…This investigation used a geopolymer mix proportion of grade M40. Several aspects were taken into consideration at the time of designing this M40 geopolymer concrete mix (Subash et al 2021;Jeffy Pravitha et al 2023). The molarity of sodium hydroxide (NaOH) was 10 M. The liquid to powder ratio was 0.48.…”

Section: Methodsmentioning

confidence: 99%

“…When not cured in hot air, fly ashbased GPC often needs a very long setting time and it develops a very poor compressive strength (Shilar et al 2022). A complete or partial addition of ground granulated bastfurnace slag (GGBS) to flyash-based GPC shortens the setting time and increases the compressive strength (Subash et al 2021). Calcium oxide content in GGBS decreases the setting time and increases the strength of GPC (Rajalekshmi et al 2023;Silva et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Impact of coconut husk microcrystalline cellulose on the properties of geopolymer lightweight concrete

Rajalekshmi,

Arul Jose

2024

BioRes

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Geopolymer composite is an alternative to ordinary Portland cement. It has potential to avoid CO2 emissions to the atmosphere and to save raw materials during its manufacture. Flyash-based geopolymer concrete is altered by adding ground granulated bast-furnace slag (GGBS) to improve its fresh and hardened properties. Thermal ash aggregate is used as coarse aggregate to reduce geopolymer concrete density, improve strength, and conserve natural aggregate. Along with this matrix, coconut husk microcrystalline cellulose (MCC) is added to enhance its performance. In a M40 grade flyash and GGBS-based geopolymer concrete, MCC was used to replace fly ash at 1% to 5% levels. The geopolymer composites were tested for slump, compression, split tensile, water absorption, and acid resistance to determine the way coconut husk MCC interacts with lightweight concrete. An inclusion of 3% MCC with geopolymer composites improved 2% slump, 6% of compressive and split tensile strength. About 1.6% of water absorption was reduced in GPC matrix with 3% of MCC. Meanwhile 3% of MCC in geopolymer concrete improved, 4% of weight and 7% of strength under acid exposure. The research strongly supported utilizing MCC in geopolymer concrete to render it more sustainable and eco-friendlier.

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“…Juez et al [12] applied image analysis technology to monitor the mixing of concrete and observe the texture of the concrete. At the same time, the power consumption during the concrete mixing process was also recorded and correlated with the texture of the concrete with the captured images [13][14][15][16]. Chopin et al [17] explained the increase in the homogenization time of superplasticizer concrete and its impact on concrete production.…”

Section: Introductionmentioning

confidence: 99%

Effects of Admixtures on Energy Consumption in the Process of Ready-Mixed Concrete Mixing

et al. 2022

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The production and utilization of concrete and concrete-based products have drastically increased with the surge of construction activities over the last decade, especially in countries such as China and India. Consequently, this has resulted in a corresponding increase in the energy used for the production of ready-mixed concrete. One approach to reduce the cost of concrete manufacturing is to reduce the energy required for the manufacturing process. The main hypothesis of this study is that the power required for mixing the concrete can be reduced through the use of mineral admixtures in the mix design. Optimization of energy consumption during mixing using admixtures in concrete manufacturing is the predominant focus of this article. To achieve this objective, power consumption data were measured and analyzed throughout the concrete mixing process. The power consumption curve is the only source to distinguish the behavior of the different materials used in the concrete in a closed chamber. In the current research, fly ash and ground granulated blast-furnace slag (GGBS) were used as mineral admixtures to produce ready-mixed concrete. The experimental study focused on the influence of GGBS and fly ash on power consumption during concrete mixing. The results indicated that the use of a higher content of GGBS is more beneficial in comparison to the use of fly ash in the mix due to the lower mixing time required to achieve homogeneity in the mixing process. It was found that the amount of energy required for mixing is directly related to the mixing time for the mix to achieve homogeneity.

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Experimental Investigation on Geopolymer Concrete with Various Sustainable Mineral Ashes

Cited by 19 publications

References 51 publications

Technogenic Fiber Wastes for Optimizing Concrete

Technogenic Fiber Wastes for Optimizing Concrete

Impact of coconut husk microcrystalline cellulose on the properties of geopolymer lightweight concrete

Effects of Admixtures on Energy Consumption in the Process of Ready-Mixed Concrete Mixing

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