Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate

Kim, Jisun; Lee, Jong‐Young; Kim, Young‐Ho; Kim, Dongchan; Kim, Jin; Han, Jung-Geun

doi:10.1016/j.cscm.2021.e00781

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…These nanomaterials exhibit extraordinary strength in cementitious composites by reinforcing nano levels. Moreover, cement is being replaced by several additives to enhance the cementitious performance of concrete and eco-friendly–sustainable construction [ 1 , 2 , 3 ]. These nanomaterials have created a new generation of cementitious composites, having excellent resistance against crack propagation at the nano level, with outstanding energy absorption capabilities before failure.…”

Section: Introductionmentioning

confidence: 99%

“…Kim, J.-S., J.-Y. Lee, Y.-H. Kim, D. Kim, J. Kim, and J.-G. Han [ 3 ] investigated the influence of feldspar on the compressive strength of sand-based mortar by incorporating feldspar (i.e., 5% to 10%) as a partial substitution of fine aggregate. It was examined that the compressive strength of the feldspar-derived mortar was about 1.1–4.5 times higher than normal sand mortar.…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of Cementitious Composites Incorporating Nano Graphite Platelets as Additive Carbon Material

et al. 2021

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Nano graphite platelets (NGPs) belong to the carbon family and have a huge impact on the construction industry. NGPs are used as multi-functional fillers and have the potential to develop reinforcing within cementitious composites. In this paper, NGPs were incorporated in cementitious composites to investigate the effects of NGPs on the fresh, mechanical, durability, and microstructural properties of concrete. Five mixes were prepared with intrusion of NGPs (0%, 0.5%, 1.5%, 3%, and 5% by weight of cement). The properties studied involved workability, air content, hardened density, compressive strength, tensile strength, flexural strength, sorptivity, ultrasonic pulse velocity (UPV), water absorption, and external sulfate attack. The workability and percent air content decrease by 22.5% and 33.8%, respectively, for concrete with 5% NGPs compared to the control mix. The specimens containing 5% of NGPs revealed the hardened density, compressive, tensile, and flexural strength to increase by 11.4%, 38.5%, 31.6%, and 44.34%, respectively, compared to the control mix. The results revealed that the incorporation of 5%NGPs in cementitious composites reduces the sorptivity and water absorption by 32.2% and 73.9%, respectively, whereas, it increases the UPV value by 7.5% compared to the control mix. Furthermore, the incorporation of NGPs provided better resistance against external sulfate attacks. SEM–EDX spectroscopy was carried out to investigate its microstructural analysis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Cementitious Composites Incorporating Nano Graphite Platelets as Additive Carbon Material

et al. 2021

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Experimental study on Alkali Activated Fine Aggregate in mortar and Masonry Blocks

Narayana

Radhakrishna³

2022

Preprint

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The present study focused on development of Alkali Activated Fine Aggregate (AAFA) by palletization method. AAFA were manufactured using Ground Granulated Blast Furnace Slag (GGBS) and alkali activator solution at ambient conditions. Sodium hydroxide of six molarity and sodium silicate to sodium hydroxide ratio of 2.5 was used. The alkali activated fine aggregates were prepared using a drum mixer by maintaining a certain rotation angle and speed. AAFA processed a rough texture. The flow properties of the plastering mortar (1:3) were studied by replacing sand by Alkali activated fine aggregate. Mortar cubes were tested to determine the characteristics of alkali activated fine aggregate mortar. Compressive strength and modulus of elasticity of the mortar were evaluated at the age of 28 days. Results indicate that speed of the mixer influence the properties of alkali activated fine aggregate. AAFA exhibited lower specific gravity, high water absorption, and lesser bulk density compared to manufactured sand. The flow of mortar increases by increasing the percentage of Alkali Activated Fine Aggregate, up to a 60% replacement of M-sand for a water cement ratio of 1.3. Beyond 60% replacement, there is a bleeding in the mix. The compressive strength of Alkali activated Fine aggregate mortar gives consistently optimum compressive strength up to an 80% replacement of AAS by M-sand. The manufactured aggregates were found to be suitable in making plaster/masonry mortar and for making masonry units.

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Alternative fine and coarse aggregates in concrete: a review

Naveena¹,

Narayana²

2022

JCE

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Concrete is the most commonly used material in the construction industry, with concrete aggregates accounting for 75 percent of the volume. Due to their primary consumption, natural aggregates are subject to depletion, leading to environmental problems. Therefore is an urgent need to develop or manufacture aggregates. This paper critically reviews the available literature on the development of manufactured aggregate for use in cement concrete. This paper has reviewed the literature on available raw materials for the production of aggregates, the properties of aggregates and their suitability in concrete mix. From the review of literature, it was found that the aggregates manufactured with the use of fly ash, plastic waste, oil palm fuel ash, and quarry dust have better properties compared to natural aggregates. The compressive strength of artificial aggregate concrete is 15-20% less than conventional natural aggregate concrete, but still meets the requirements of applications.

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Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate

Cited by 4 publications

References 13 publications

Performance Evaluation of Cementitious Composites Incorporating Nano Graphite Platelets as Additive Carbon Material

Performance Evaluation of Cementitious Composites Incorporating Nano Graphite Platelets as Additive Carbon Material

Experimental study on Alkali Activated Fine Aggregate in mortar and Masonry Blocks

Alternative fine and coarse aggregates in concrete: a review

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