Evolution of Arabic Gum-based green mortar towards enhancing the engineering properties – Fresh, mechanical, and microstructural investigation

Nasir, Muhammad; Islam, A. B. M. Saiful; Alotaibi, Khalid Saqer; Al-Kutti, Walid A.

doi:10.1016/j.conbuildmat.2022.130025

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…The use of GA active dispersant increased the flow value of cementitious materials significantly. This is consistent with literature 35 . MWCNTs can adsorb water molecules due to their large specific surface area.…”

Section: Introductionsupporting

confidence: 94%

MWCNTs dispersion adopting GA and its application towards copper tailings-based cementitious materials

Xiang,

Cheng,

Zhu

et al. 2023

Sci Rep

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Hydrophobic carbon nanotubes are hardly to disperse in water and prone to agglomerate when poured with Copper Tailing-Based Cementitious Material (CTCM). Multi-walled carbon nanotubes (MWCNTs) + Arabic Gum (GA) dispersions were prepared by a novel method of synergistic optimization of concentration, controlling low-frequency ultrasonic time and setting the ambient temperature with non-toxic anionic surfactant GA as surfactant. The results of UV–Vis spectroscopy showed that the high stability MWCNTs + GA dispersion with low aggregation area (< 1.2%) and low aggregation beam size (< 219 nm) have been prepared by using 1.7 mmol/l GA. The effects of highly stable MWCNTs dispersion on the mechanical properties, microstructure and durability of CTCM were studied. The 28 days compressive strength increased by 21.5%, and the flexural strength increased by 20.5%, almost reaching the mechanical level of the control group. The results of SEM, XRD and EDS showed that GA significantly enhanced the dispersion of MWCNT in aqueous solution at a suitable concentration (mass ratio of GA:CNTs = 1:1). The microstructure of the prepared CTCM by high stability MWCNTs dispersion was optimized obviously, and the mechanical properties and durability were improved significantly. This method solves the dual problem of MWCNTs not being fully dispersed in aqueous solution and being easily re-agglomerated in cementitious materials, as well as finding a breakthrough for the low cost and industrialization of tailings cement-based composite cementitious materials.

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Section: Introductionsupporting

confidence: 94%

MWCNTs dispersion adopting GA and its application towards copper tailings-based cementitious materials

Xiang,

Cheng,

Zhu

et al. 2023

Sci Rep

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“…Before the test, 28 d-cured samples were cut into rectangular sizes no larger than 5 mm and then went through a gold-plated process. During the test, the following conditions were set at a high vacuum mode, a physical working distance of ~10 mm, and an accelerated voltage of 20.00 kV [31]. The final images were captured at 5 kx for comparative studies to evaluate if the designed method could help improve the microstructures of roadbase materials containing CPG and RCA.…”

Section: Scanning Electron Microscope Testmentioning

confidence: 99%

Performance Improvement and Microstructure Characterization of Cement-Stabilized Roadbase Materials Containing Phosphogypsum/Recycled Concrete Aggregate

Wu,

Bian,

Liu

et al. 2023

Materials

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The proper reutilization of the phosphogypsum (PG) by-product derived from the production of phosphoric acid and recycled concrete aggregate (RCA) from waste concrete in roadbase materials is of great necessity and importance. This investigation tried seeking a new approach to reuse them to high quality, including turning PG into calcinated PG (CPG) via washing and calcination, as well as adopting sodium metasilicate nonahydrate (SMN) to strengthen the roadbase materials of cement-stabilized CPG and RCA. Upon the mix design, with a series of experiments including unconfined compressive strength, the wet–dry cycle, freeze–thaw cycle, and scanning electron microscopy, the comprehensive effects of PG treatment, the CPG to RCA mix ratio, SMN dosage, wet–dry cycle and freeze–thaw cycle on the road performance of roadbase materials were well evaluated, and the traffic bearing capacity and microstructure characteristics were also analyzed. The results demonstrate that the 7 d unconfined compressive strength of CPG/RCA roadbase materials can reach 5.34 MPa as the CPG and SMN dosage are 20% and 11%, respectively, which meets the requirements of an extremely and very heavy traffic grade. After five wet–dry cycles and freeze–thaw cycles, the resistance of the CPG/RCA roadbase materials to moisture and frost was significantly improved as 11% SMN was added. Meanwhile, SMN contributes to the reduction in crack width and densifies the microstructure of CPG/RCA roadbase materials. The research results can be used to provide new guidance for building more durable roadbase materials.

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Exploring the Impact of Flaxseed Mucilage Admixture Addition Ways on OPC Materials: Insights into Setting and Mechanical Properties

Brevet,

Montrelay,

Houessou

et al. 2024

Iran J Sci Technol Trans Civ Eng

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Evolution of Arabic Gum-based green mortar towards enhancing the engineering properties – Fresh, mechanical, and microstructural investigation

Cited by 6 publications

References 16 publications

MWCNTs dispersion adopting GA and its application towards copper tailings-based cementitious materials

MWCNTs dispersion adopting GA and its application towards copper tailings-based cementitious materials

Performance Improvement and Microstructure Characterization of Cement-Stabilized Roadbase Materials Containing Phosphogypsum/Recycled Concrete Aggregate

Exploring the Impact of Flaxseed Mucilage Admixture Addition Ways on OPC Materials: Insights into Setting and Mechanical Properties

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