Orthogonal Experimental Study on Properties of Hybrid Fiber Reinforced Cement Mortar

Yuan, Hai Yan; Shui, Zhang; Li, Guo Zhong

doi:10.4028/www.scientific.net/amr.168-170.456

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…However, when the content of MTS is more than 30%, the splitting tensile strength of MTSC decreases gradually with the increase in MTS. Moreover, the ratio of splitting tensile strength to compressive strength of MTSC remains between 1/10 and 1/20, which is consistent with the law of ordinary concrete [28,29]. In conclusion, the addition of an appropriate amount of MTS cannot degrade the splitting tensile strength of concrete and may even slightly improve it.…”

Section: Splitting Tensile Strengthsupporting

confidence: 81%

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Properties and Microstructural Characteristics of Manganese Tailing Sand Concrete

2022

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In this work, manganese tailing sand concrete (MTSC) was prepared using manganese tailing sand (MTS) in replacement of river sand (RS) to alleviate the shortage of RS resources and achieve clean treatment and high-value resource utilization of manganese tailing stone. The effects of MTS content on the slump, mechanical strength, air void characteristics, hydration products and micromorphology of MTSC were studied experimentally. The leaching risk of harmful substances in MTSC was also explored by testing the concentration of Mn2+. The results show that the utilization of MTS reduces the slump of MTSC to a certain extent. When the MTS content is lower than 40%, the gypsum introduced by MTS and C3A in cement undergoes a hydration reaction to form ettringite, which decreases the number of pores with a diameter less than 0.1 mm and promotes strength development in MTSC. Additionally, when the MTS content exceeds 40%, the large amount of gypsum reacts to form more ettringite. The expansive stress generated by the ettringite severely damages the pore structure, which is not conducive to the mechanical properties of MTSC. In addition, the leaching of hazardous substances in MTSC is insignificant, and the incorporation of cement can effectively reduce the risk of leaching hazardous substances in MTSC. In summary, it is completely feasible to use MTS to replace RS for concrete preparation when the substitution rate of MTS is less than 40%, with no risk of environmental pollution. The results and adaptation in the concrete industry can reduce the carbon footprint, which is in line with the current trend in civil and materials engineering.

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Section: Splitting Tensile Strengthsupporting

confidence: 81%

“…ratio of splitting tensile strength to compressive strength of MTSC remains betw and 1/20, which is consistent with the law of ordinary concrete [28,29]. In concl addition of an appropriate amount of MTS cannot degrade the splitting tensile of concrete and may even slightly improve it.…”

Section: Splitting Tensile Strengthsupporting

confidence: 81%

Properties and Microstructural Characteristics of Manganese Tailing Sand Concrete

2022

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“…Therefore, the relationship between compressive strength and thermal conductivity of DGC can be quantitatively evaluated to improve experimental efficiency. The regression analysis and significance test of the experimental results are performed using SPSS software in this paper [40]. The regression prediction models are as follows:…”

Section: Regression Analysis Of Compressive Strength and Thermal Cond...mentioning

confidence: 99%

Effects of Different Admixtures on the Mechanical and Thermal Insulation Properties of Desulfurization Gypsum-Based Composites

et al. 2023

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The single-factor experiments are designed to quantitatively investigate the effects of silica fume, mineral powder, and fly ash on the mechanical and thermal insulation properties of desulfurization gypsum-based composites (DGCs). The effect mechanism is discussed from the microscopic morphology of the internal structure, and the corresponding relationship between the strength and thermal conductivity of this material is evaluated by the regression model. The results show that the admixture of silica fume, mineral powder, and fly ash improves the strengths and thermal insulation properties of DGCs, with the order of influence silica fume > mineral powder > fly ash. The optimal 28 d compressive strength and thermal conductivity are 34.17 MPa and 0.2146 W/(m·K), respectively, at a silica fume dosage of 35%. The enhancement effects on the strength and thermal insulation performance of DGCs are attributed to the increase in the hydration products C-S-H gel and Aft. Moreover, the thermal conductivity linearly decreases with the increase in the compressive strength of DGC after adding silica fume, mineral powder, and fly ash. The linear regression models exhibit good precision for evaluating the corresponding relationships between the compressive strength and thermal conductivity of DGCs with different admixtures.

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Design, synthesis and characterization of a starch-based superabsorbent polymer and its impact on autogenous shrinkage of cement paste

Guan,

Zhang,

Zhao

2024

Construction and Building Materials

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Orthogonal Experimental Study on Properties of Hybrid Fiber Reinforced Cement Mortar

Cited by 3 publications

References 5 publications

Properties and Microstructural Characteristics of Manganese Tailing Sand Concrete

Properties and Microstructural Characteristics of Manganese Tailing Sand Concrete

Effects of Different Admixtures on the Mechanical and Thermal Insulation Properties of Desulfurization Gypsum-Based Composites

Design, synthesis and characterization of a starch-based superabsorbent polymer and its impact on autogenous shrinkage of cement paste

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