Effects of Fines Content on Durability of High-Strength Manufactured Sand Concrete

Zheng, Sunbo; Chen, Jiajian; Wang, Wenxue

doi:10.3390/ma16020522

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…The study highlights the potential for further enhancements in flowability and tensile strength. Zheng et al (2023) [17] examines the high-strength M-sand concrete for the durability characteristics, the impact of high fines content was assessed for the mix prepared with the incorporation of granite and limestone M-sand. The study finds that a fines content of 10% yields the smallest carbonation depth and effectively improves chloride and sulphate impermeability.…”

Section: Literature Reviewmentioning

confidence: 99%

Inspection of the mechanical and durability behavior of concrete developed using M-sand

2023

IJATEE

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Growing global demand for river sand (R-sand), especially in India, is unsustainable, consuming 32-50 billion tonnes annually for concrete. This overuse threatens supply. R-sand extraction harms the environment and infrastructure. In response, M-Sand is a popular, consistent, and legal alternative. When using unwashed M-Sand, be aware of potential higher fines content, requiring more water for workability. Replacing R-sand with M-Sand enhances overall strength and performance of concrete. Manufacturing sand (M-Sand) also outperforms R-sand in terms of strength, with particle shape and texture less influential than stone powder (SP) and clay content. Choosing the right application can optimize M-Sand performance in concrete. *Author for correspondenceIn the realm of construction materials, the amalgamation of aggregates bound by cementitious paste has granted concrete unparalleled versatility, strength, and durability. This compels concrete to emerge as the paramount choice for construction endeavors [1,2]. The expanding urban landscapes worldwide have triggered a surge in construction activities, consequently driving the demand for cement to unprecedented heights. Projections made in 2016 forecasted a robust annual growth rate of 5.2%, catapulting the global cement market to an astounding 51.7 billion tons [3,4]. This escalating construction fervor has escalated the necessity for sand, a pivotal component in concrete manufacturing [5]. The conventional choice of natural R-sand as a fine aggregate has encountered challenges due to its depleting availability and soaring costs [6,7]. In response, manufactured sand has gained prominence as a promising alternative. Characterized by its finer particles that adeptly fill microscopic concrete pores,

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Section: Literature Reviewmentioning

confidence: 99%

Inspection of the mechanical and durability behavior of concrete developed using M-sand

2023

IJATEE

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“…The granite powder was beneficial regarding the high-strength concrete durability with manufactured sand within a certain range of replacements. However, too-high values of fine powder could inhibit the hydration of the cement and then adversely affect the durability of the resulting concrete [20]. Shen et al found that the particle shape and surface texture of manufactured sand had less influence on the performance of the concrete than that of stone powder [21].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Mechanical Properties and Microstructures of Mass-Manufactured Sand Concrete by Incorporating Granite Powder

Huang,

Xu,

Chen

et al. 2024

Materials

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The production of manufactured sand and stone processing can cause dust pollution due to the generation of a significant amount of stone powder. This dust (mainly granite powder) was collected and incorporated as a cement replacement into mass-manufactured sand concrete in order to enhance the mechanical properties and microstructures. The heat of the hydration was measured by adding the granite powder into the cementitious material system. The mechanical properties, autogenous shrinkage, and pore structures of the concrete were tested. The results showed that the mechanical strength of the concrete increased first and then decreased with the increase in granite powder content. By replacing the 5% cement with the granite powder, the 28 d compressive and flexural strength increased by 17.6% and 20.9%, respectively. The autogenous shrinkage was mitigated by the incorporation of the 10% granite powder and decreased by 19.7%. The mechanism of the granite powder in the concrete was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP). The porosity decreased significantly within the 10% granite powder. A microstructure analysis did not reveal a change in the type of hydration products but rather that the granite powder played a role in the microcrystalline nucleation during the hydration process.

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“…Yang et al [ 26 ] experimentally determined that the depth of reinforcement carbonation and the probability of corrosion initially decreased, then increased with the increasing proportion of stone powder, reaching a minimum carbonation depth at 7% stone powder content. Zheng et al [ 27 ] showed that the carbonation depth of manufactured sand concrete is the smallest when the fines content is 10%. When the fines content is less than 15%, the chloride and sulfate impermeability of concrete are improved effectively.…”

Section: Introductionmentioning

confidence: 99%

Impact of Stone Powder Content on Corrosion Resistance in Reinforced Concrete under Stray Current and Chloride Interactions

Zhang,

Jin

et al. 2023

Materials

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Manufactured sand, known for its artificial production, eco-friendliness, cost-effectiveness, and sustainability, serves as an excellent alternative to natural sand. Stone powder content plays a crucial role in determining the performance of manufactured sand, significantly enhancing concrete compaction and its ability to withstand environmental degradation. This study aims to explore the feasibility of using environmentally and economically advantageous manufactured sand in the construction of subway tunnel segments in coastal areas. It investigates the impact of stone powder content on the corrosion resistance of concrete made with manufactured sand under the combined influence of chloride salts and stray currents. The analysis covers corrosion tendencies, the post-rusting performance of reinforcement bars, the resistance of concrete to chloride transport, and microstructure properties, which are assessed through electron microscope scanning and mercury compression testing. The findings indicate that the corrosion resistance of manufactured sand concrete generally surpasses that of river sand concrete. Furthermore, stone powder content within the 3–8% range leads to a denser concrete microstructure, reduced porosity, lower free-chloride ion levels, increased polarization resistance of post-corrosion reinforcements, lower corrosion current density, and reduced mass loss of reinforcing bars. This research provides valuable theoretical support for promoting the use of environmentally friendly manufactured sand concrete in subway construction projects.

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Effects of Fines Content on Durability of High-Strength Manufactured Sand Concrete

Cited by 12 publications

References 32 publications

Inspection of the mechanical and durability behavior of concrete developed using M-sand

Inspection of the mechanical and durability behavior of concrete developed using M-sand

Enhancing Mechanical Properties and Microstructures of Mass-Manufactured Sand Concrete by Incorporating Granite Powder

Impact of Stone Powder Content on Corrosion Resistance in Reinforced Concrete under Stray Current and Chloride Interactions

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