An experimental study on compressive properties of concrete with manufactured sand using different stone powder content

Zheng, Shunyuan; Liang, Junlin; Hu, Yongjun; D, Wei; Lan, Yi-fu; Du, Hongliang; Rong, Hongliu

doi:10.1080/00150193.2021.1903257

Cited by 16 publications

(5 citation statements)

References 18 publications

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“…According to [9], the characteristic value of each mechanical characteristic for concrete has a 95% assurance factor, namely, k b1 = k b2 = k b3 = k b4 = 1.645. Additionally, stochastic variables Z r1 , Z r2 , Z r3 and Z r4 are obtained according to Equation (17), respectively. P7 was a concrete prepared with 7% of LP content.…”

Section: Resultsmentioning

confidence: 99%

“…Tang et al [14], Febin et al [10] and Shen et al [15] reported that for concrete prepared with a C15~C55 grade, at a relatively low RP content (≤ 6%), it may positively correlate with the compressive intensity. Generally, with an increase in RP, the strength and modulus of elasticity decreased [16,17]. Then, Wu et al [18] determined the optimal RP content for axial compressive intensity, flexural intensity, splitting tension and modulus of elasticity for C80 concrete.…”

Section: Introductionmentioning

confidence: 99%

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Contribution of Steel Fiber to the Mechanical Property Improvement of C80 Concrete Produced with a High Amount of Artificial Sand Powder

et al. 2023

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Due to the high price of river sand, its shortage and unsustainable extraction from the environment, artificial sand (AS) has been promoted as a fine aggregate for producing concrete. However, it has been acknowledged that a high content of limestone powder (LP), up to 15 wt.%, as a by-product in AS coexists and it has an adverse impact on the mechanical properties of concrete. To compensate for the performance loss of C80 concrete with a high LP content to the applications of concrete on a large scale, this study evaluates the contribution of steel fiber content to the performance improvement of concrete by means of a developed statistical method. Experimental results show that when increasing the LP in concrete over 5%, it can influence axial compression, flexural intensity, splitting tension and the modulus of elasticity, in particular, presenting an obvious decrease in axial compressive intensity, splitting tension and modulus of elasticity. Incorporating steel fibers in such concrete prepared with a high amount of artificial sand powder is a way to compensate for its performance loss. Referring to the experimental results and probability theory, the probability density function of the characteristic value of mechanical characteristic of one type of concrete and the difference between the characteristic values of mechanical characteristics of any two concretes were developed to establish a scientific criterion that can be used to compare the sizes of any two characteristic probability values, which is superior to the comparative approach of arithmetic averages in publications. By adopting this method, the high-strength concrete with a high LP and steel fiber content could be applied in engineering practices from the point of view of its mechanical properties. Meanwhile, the study provides an evaluation method for other scientific research on the size comparison of any two stochastic physical variables.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Contribution of Steel Fiber to the Mechanical Property Improvement of C80 Concrete Produced with a High Amount of Artificial Sand Powder

et al. 2023

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“…As shown in figure 12, the ITZ and mortar were denser when the sand ratio was 38%, which was consistent with the results of concrete mechanical properties. With the increase in sand ratio, there was no obvious crack in ITZ, while the roughness of mortar increased significantly, because the fine powder in the sand could hinder the hydration of the cement, but it also performed the effect of filling the pores [32].…”

Section: Microscopic Characteristicsmentioning

confidence: 99%

The flowability and high-temperature resistance of manufactured sand concrete: An exploration for high-rise buildings

Ren,

Hua,

Wang

et al. 2023

Mater. Res. Express

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The depletion of natural concrete aggregates, e.g., river sands, is a gradual process, and hence, manufactured sand concrete (MSC) is widely used in various construction projects. The flowability and high-temperature resistance of MSC directly determine the transport of fresh concrete and the fire resistance of high-rise buildings. In this study, MSC with different superplasticizer contents and sand ratios was prepared and its flowability and high-temperature resistance were studied. Scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP) were used to characterize the microstructure and porosity of MSC. The flowability of MSC with higher than 0.75% superplasticizer content or lower than 43% sand ratio is suitable for super high-rise buildings according to GB/T 50081-2019. The mechanical properties of other MSC meet the C30 requirements except for the MSC with a sand ratio of 48%. And the relatively high superplasticizer content or low sand ratio can make the denser structure and lower porosity of MSC. In addition, the MSC with relatively high superplasticizer content and low sand ratio exhibits better resistance to high temperatures due to a denser structure. This study provides theoretical guidance for using MSC in high-rise buildings and studying fire performance.

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“…The MS will produce mud powder in the mining and processing process, and the fine powder particles below 75 μm are composed of stone powder MS. It has been shown that the right amount of stone powder has an improving effect on the performance of MSC (Wang et al, 2021;Zheng et al, 2021;Elik and Marar, 1996). However, unlike stone powder, mud powder will adversely affect the working performance, mechanical properties, and durability…”

Section: Introductionmentioning

confidence: 99%

Study on performance and fractal characteristics of high-strength manufactured sand concrete with different MB values

Zhou

Ge²,

Chen³

et al. 2023

Front. Earth Sci.

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The mud powder in the manufactured sand will have an influence on the indicators of the manufactured sand concrete (MSC), and the methylene blue value can quantitatively indicate the mud powder content. To demonstrate the impact of MB values on the performance and microstructural characteristics of the manufactured sand concrete, the paper designed five high-strength MSC proportions at five MB values by controlling the clay powder content. On this basis, the workability, chloride migration coefficient, relative dynamic modulus of elasticity (P), mass loss rate (η), and dry shrinkage rate of MSC concrete were tested under five mix ratios, and the relationship between concrete microstructure, fractal characteristics, and compressive strength (fcc) was analyzed by combining SEM technology and fractal theory. The experiment showed that: the higher the MB, the lower the fluidity of the MSC, and the cohesiveness gradually increases, while the water retention remains basically unchanged. In addition, the chloride migration coefficient gradually increases, the P after 300 freeze-thaw cycles first increases and then gradually decreases, while the η and drying shrinkage first decreases and then gradually increases, and the MB value corresponding to the turning point of these three changes are all 1.10. With MB values of 0.85 and 1.10, the degree of hydration of MSC is higher and the overall structural compactness is better. The higher the MB value, the more inadequate the hydration of concrete, and the mineral components such as fly ash that have not been hydrated inside gradually increase, which leads to the gradual decrease of the overall structure compactness. In addition, when the MB value is small, the SEM image texture of concrete is relatively simple, the fractal dimension value is small, and the corresponding fcc is large. When the MB value is large, the texture of the SEM image is complex, the fractal dimension is large, and the corresponding fcc is small.

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An experimental study on compressive properties of concrete with manufactured sand using different stone powder content

Cited by 16 publications

References 18 publications

Contribution of Steel Fiber to the Mechanical Property Improvement of C80 Concrete Produced with a High Amount of Artificial Sand Powder

Contribution of Steel Fiber to the Mechanical Property Improvement of C80 Concrete Produced with a High Amount of Artificial Sand Powder

The flowability and high-temperature resistance of manufactured sand concrete: An exploration for high-rise buildings

Study on performance and fractal characteristics of high-strength manufactured sand concrete with different MB values

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