Effect of different superplasticizers on the mechanism, workability, and microstructure of biomass-activated grouts

Zhu, Zhijing; Zhang, Qingsong; Zhang, Huasheng; Liu, Rentai; Shao, Changzhi; Ma, Chao; Chen, Mengjun; Bai, Jiwen

doi:10.1016/j.conbuildmat.2023.130857

Cited by 11 publications

(3 citation statements)

References 51 publications

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“…Concrete microstructure highly depends on the hydration reaction duration, water-binder ratio, admixtures, and cement type [21]. Fly ash and superplasticizers are critical in microstructure because they accelerate cement hydration reactions and optimize pore distribution, creating a denser matrix [70]. SEM analysis was performed on all mixtures with the samples collected from cube specimens used for hardened property investigation at 28 days, and the images of the samples that performed better in compressive strength are shown in figure 6.…”

Section: Microstructural Study Through Sem Analysismentioning

confidence: 99%

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO₂ emission

Shunmuga Vembu,

Ammasi

2024

Mater. Res. Express

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Managing waste materials from mining is of universal interest owing to its massive volume, ecological impacts, health hazards, and disposal challenges despite high operational costs. Advancements advocate for recycling mine waste to sustainably support construction. As the construction sector heavily consumes resources, utilizing mine waste from magnesite mines (MMW) in concrete has gained attention. This experimental study assesses the viability of substituting MMW for natural fine and coarse aggregates in self-compacting concrete (SCC) at intervals of 10% up to 50% by weight. Evaluations were done on fresh (slump flow, T50 slump, V-funnel, J-ring, L-box) and hardened (compressive, splitting tensile, and flexural strength) properties, along with microstructural features, cost, and CO2 emissions. The findings unveil that nearly all mixtures exhibit commendable performance, where mine waste is replaced for fine and coarse aggregates showcasing superior fresh and hardened properties, respectively. Fresh property results reveal the SF1 flow category with VF1 and VF2 viscosity types for the SCC mixtures. Moreover, these SCC mixtures observed substantial strength enhancements of approximately 10% to 15% in compressive, splitting tensile and flexural test results at 28 and 90 days. Microstructural analysis corroborates the observed strength outcomes, indicating a denser concrete matrix. Significant environmental and economic benefits were observed, including a notable 20% reduction in CO2 emissions and 17% cost savings. These findings underscore the potential of integrating MMW into SCC mixtures as a sustainable approach towards construction materials, offering both performance and environmental advantages.

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Section: Microstructural Study Through Sem Analysismentioning

confidence: 99%

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO₂ emission

Shunmuga Vembu,

Ammasi

2024

Mater. Res. Express

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“…Among superplasticizers, naphthalene sulfonate, polycarboxylate, and melamine-sulfonated superplasticizers used in biomass-activated grouts decrease the cement-based materials' initial setting time [32]. Acrylic polymers (with no formaldehyde) in a water solution (Dynamon SR3-SR3 and Dynamon SR41-SR41) used in cement-based materials increase their initial setting time [33]. The cement hydration process is divided into five stages: initial, dormant, hardening, cooling, and densification.…”

Section: Introductionmentioning

confidence: 99%

“…The densification is from 20 h and lasts as long as the cement grains are in contact with water. After about 28 days, the hydration of the cement is considered closed as most of the cement grains have reacted with water, forming hydration products [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Developing Innovative Cement Composites Containing Vine Shoot Waste and Superplasticizers

et al. 2023

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The expansion of the construction industry requires large quantities of construction materials; therefore, the utilization of alternative raw materials that reduce the environmental impact and enhance the quality of the construction materials has received increasing interest. The comparative performance of 1% Dynamon SR3 or Dynamon SR41 superplasticizers on the properties of cement paste with 1 wt.% vine shoot waste addition (VSW) was investigated after 28 days using Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), and solid-state 27Al and 29Si nuclear magnetic resonance (NMR) spectroscopy. VSW does not delay the formation of calcium hydroxide and C–S–H and a slight decrease of the –OH band in samples containing superplasticizers, suggesting that free lime is converted to carbonates. The highest degree of crystallinity was remarked for the samples with superplasticizers. The structure of the cement paste with VSW and superplasticizers was corroborated with mechanical properties, showing increased strength in using VSW and superplasticizers. The results showed that adding 1% VSW and superplasticizers does not change the performance of the cement paste but reduces the water-cement ratio. The combination of VSW and superplasticizers led to cement composite with improved structural and mechanical properties suitable for construction.

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Towards the preparation of sustainable superplasticizers for geopolymeric pastes via radiation-induced grafting of sulfonic group-bearing monomers onto corn starch

Deghiedy,

El-Gamal,

Ramadan

et al. 2024

Carbohydrate Polymers

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Effect of different superplasticizers on the mechanism, workability, and microstructure of biomass-activated grouts

Cited by 11 publications

References 51 publications

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO₂ emission

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO₂ emission

Developing Innovative Cement Composites Containing Vine Shoot Waste and Superplasticizers

Towards the preparation of sustainable superplasticizers for geopolymeric pastes via radiation-induced grafting of sulfonic group-bearing monomers onto corn starch

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Effect of different superplasticizers on the mechanism, workability, and microstructure of biomass-activated grouts

Cited by 11 publications

References 51 publications

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO2 emission

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO2 emission

Developing Innovative Cement Composites Containing Vine Shoot Waste and Superplasticizers

Towards the preparation of sustainable superplasticizers for geopolymeric pastes via radiation-induced grafting of sulfonic group-bearing monomers onto corn starch

Contact Info

Product

Resources

About

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO₂ emission

Sustainable use of magnesite mine waste in self-compacting concrete and its study on strength, microstructure, cost and CO₂ emission