A systematic study on sustainable low carbon cement – Superplasticizer interaction: Fresh, mechanical, microstructural and durability characteristics

Bhandari, Ishan; Kumar, Rajesh; Sofi, A.; Nighot, Nikhil Sanjay

doi:10.1016/j.heliyon.2023.e19176

Cited by 11 publications

(2 citation statements)

References 99 publications

(171 reference statements)

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“…Similar trends were observed for final setting time (FST). These results align with Bhandari et al's findings [46], indicating that polycarboxylate-based admixtures like CS reduce Ca 2+ concentration, creating a strong bond through adsorption and consequently reducing overall setting times.…”

Section: Setting Time and Consistencysupporting

confidence: 90%

Aloe Vera-Based Concrete Superplasticizer for Enhanced Consolidation with Limestone Calcined Clay Cement

Nyabuto,

Abuodha,

Mwero

et al. 2023

Applied Sciences

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Self-consolidating concrete (SCC) is renowned for its outstanding workability and ability to seamlessly flow into intricate structures with minimal vibrations, achieved through the incorporation of chemical admixtures. This study pioneers an innovative approach by exploring the use of the cost-effective and readily available plant extract aloe vera mucilage (AVM) as a bio-admixture for SCC. The primary objective is to assess the impact of AVM on SCC formulations, including those comprising ordinary Portland cement (OPC) and blended cement LC3 (clinker 50%, calcined waste clay 30%, limestone 15%, gypsum 5%). AVM is applied at varying dosages at up to 10%. Findings reveal that LC3 exhibits lower consistency, reduced slump values, and extended initial and final setting times compared to OPC. With increasing plasticizer dosage, V-funnel and L-box values decrease. Notably, OPC samples with both plasticizers outperform LC3 in compressive strength at 7, 14, and 28 days. Significantly, a 2.5% AVM dosage demonstrates enhanced compressive strength in both OPC and LC3 samples. In summary, this research positions AVM as an innovative and comparable alternative to commercial plasticizers, contributing to reduced yield stress and increased slump flow in SCC.

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Section: Setting Time and Consistencysupporting

confidence: 90%

Aloe Vera-Based Concrete Superplasticizer for Enhanced Consolidation with Limestone Calcined Clay Cement

Nyabuto,

Abuodha,

Mwero

et al. 2023

Applied Sciences

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“…This effect is mainly due to the reduced distance between the cement particles, along with the constant consumption of free water through hydration [ 46 ]. The inclusion of a superplasticizer prevents (i) flocculation by adsorbing onto the surface of cement grains and (ii) the reduction in the entrapment of water in the flocculated structure, thus reducing the water demand to obtain the same fluidity in the cement matrix [ 47 ]. The flow diameter of the mortar samples was reduced up to three times when the w/b ratio was reduced from 0.5 to 0.35.…”

Section: Resultsmentioning

confidence: 99%

Impact of Superplasticizers on the Performance of Low-Grade Limestone-Based Cement Mixes

Muthu,

Kumar,

Ukrainczyk

et al. 2024

Materials

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Low-grade limestone (LGL) is not used to produce cement clinker, but this leftover material in cement quarries increases the water demand when used as a filler in concrete production. In this study, the effect of six commercial superplasticizers on the performance of cement mixes containing 35% LGL and 2% gypsum was investigated. The optimal doses of these superplasticizers were found in a range of different water/binder (w/b) ratios by conducting several Marsh cone and mini-slump tests. The addition of a superplasticizer with a higher active solid content produced a maximum cement flow, regardless of the w/b ratios. The LGL-based mortar samples admixed with this superplasticizer obtained a maximum compressive strength of about 36 MPa at the end of 28 days. SEM and XRD results showed the formation of a new calcium-rich mineral in their microstructure. These findings highlight the impact of the type and properties of superplasticizers on the performance of concrete mixes containing LGL as a supplementary cementitious material.

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Rheological and Mechanical Properties of Self-Compacting Concrete with Partial Replacement of Marble Slurry and Fly Ash

Verma,

Kumar,

Mukherjee

et al. 2024

Lecture Notes in Civil Engineering

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A systematic study on sustainable low carbon cement – Superplasticizer interaction: Fresh, mechanical, microstructural and durability characteristics

Cited by 11 publications

References 99 publications

Aloe Vera-Based Concrete Superplasticizer for Enhanced Consolidation with Limestone Calcined Clay Cement

Aloe Vera-Based Concrete Superplasticizer for Enhanced Consolidation with Limestone Calcined Clay Cement

Impact of Superplasticizers on the Performance of Low-Grade Limestone-Based Cement Mixes

Rheological and Mechanical Properties of Self-Compacting Concrete with Partial Replacement of Marble Slurry and Fly Ash

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