characteristics of mining sand in concrete
Influence of manufactured sand's characteristics on its …
Abstract. Manufactured sand (MS) is widely considered as an alternative of the river sand (RS) recently, and to clarify the influence significance and influence …
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Effects of w/b ratio, fly ash, limestone calcined clay, seawater …
The cement used in this study is Conch Brand Ordinary Portland Cement (OPC), the specific surface area of cement is about 325 m 2 /kg, the ignition loss is about 3.91%, and the initial setting time and final setting time are 183 min and 234 min respectively. The compressive strength and flexural strength at 3 days are 29.8 MPa and …
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Compressive Strength of Natural sand and M- sand concrete
The present investigation aims to study the properties of concrete in which Manufactured sand (M-Sand) is used as a partial and full replacement for natural sand. To retain the natural resource ...
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Mechanical characteristics and energy dissipation characteristics …
According to the research on alternative materials for river sand for many years, it is found that ultra-fine sand can be used as a substitute for river sand in concrete as fine aggregate [4,5]. Yugen Li [6] et al. revealed the influence mechanism of aeolian sand on the mechanical properties of concrete from multiple scales.
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Natural sand substitution by copper mine waste rocks for concrete …
In this study, the feasibility of using copper mine waste rocks (CMWR) as a substitute of natural sand in C25 concrete category (25 MPa at 28 days) was evaluated. In The first stage, the physical, chemical, mineralogical, geotechnical, and environmental characterizations of CMWR were conducted. Then, three concretes mixtures were …
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Influence of manufactured sand's characteristics on its concrete …
Manufactured sand, obtained through mining, mechanical crushing, and processing of rocks has particle sizes less than 4.75 mm. Due to the increasing scarcity of natural sand, there is a growing ...
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Dynamic response characteristics of coral reef sand concrete …
The dynamic mechanical properties, energy evolution characteristics, breakage modes, and damage mechanism of coral reef sand concrete (CRSC) are distinctly different from those of land-sourced aggregate concrete. Because structures made of CRSC may suffer damage due to earthquakes and artillery shells, it is significant …
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Sustainable assessment of concrete mixes
The stress–strain characteristics of concrete showed that the increment of the dolomite mining residues in concrete reduces the ductility and increases brittleness. The reduction in peak strain and stress values is attributed to the dolomite mining residues particles which are softer than the natural river sand.
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(PDF) Characteristics of M-Sand as a Partial …
In the present study manufactured sand with varying proportions from 0 to 40 % by its weight are mixed with concrete …
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Stress-strain characteristics of concrete containing quarry …
However, concrete with 25% sand replacement gave the highest (7.9% higher than concrete with no sand replacement) modulus of elastic of concrete. The equations to predict modulus of elasticity of quarry dust concrete based on the compressive strength derived in this study varies greatly from those proposed in standard codes of …
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Load-bearing characteristics of concrete-filled steel tubular …
The load-bearing characteristics and failure mode of CFSTCPs in the sand-rock composite ground are revealed through model tests. • The dimensionless relationship between ζ b and l r and σ c is derived to evaluate the critical rock-socketed length.. An empirical method for calculating the ultimate bearing capacity of CFSTCPs in …
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Production of gold mine tailings based concrete pavers by …
Most of these studies investigated mechanical properties of concrete and show that GMT can substitute natural river sand (NRS) up to 30% in a mortar typically consisting of cement and sand. These studies showed that the compressive strength can decrease beyond 30% of substitution; but other characteristics like water retention can …
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PERFORMANCE OF CONCRETE WITH MINING SAND AS AN …
CHARACTERISTICS OF MINING SAND AS FINE AGGREGATE. EXPERIMENTAL PROCEDURES. RESULTS AND DISCUSSION. CONCLUSIONS. REFERENCES. …
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Strength and durability characteristics of copper tailing concrete
When the water–cement ratio is 0.4, the copper tailing concrete shows more compressive strength than that of control mix, till 40% substitution (90 day strength). Similar trend can be seen till 20% substitution in 0.45 w/c …
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Effects of saturated lightweight sand content on key characteristics …
1. Introduction. Ultra-high-performance concrete (UHPC) is a new class of cementitious composites that can develop superior mechanical properties and superior durability [1], [2].However, low water-to-binder ratio (w/b < 0.25) of UHPC can result in low degrees of hydration of cement, typically < 50% [3].UHPC can have significant amount of …
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Sand and gravel resources | SpringerLink
Sand and gravel constitute one of the most ubiquitous resources in the world. These nonrenewable resources are a crucial component to the lifestyle of the average person, primarily as a building material. The use of sand and gravel as a resource is dependent on their physical characteristics, the origin of the deposit, and where it occurs.
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An experimental study on strength characteristics of self …
Waterway sand is normally gotten grainy material found through means of digging after stream cribs. Sand is essentially plastered for the spaces in concrete. Close by realistic waterway sand having a mass thickness of 1860 kg/m3 was utilized [9]. Watercourse sand is filtered to 4.75 mm and the passes that sand is utilized. 3.3 . …
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Development of sustainable modified sand concrete: An …
1. Introduction. Sand has become an essential natural resource consumed widely as construction materials, mainly in concrete and mortar [1], [2].The sand demand in the construction industry has increased globally due to higher living standards and urban expansion [3], [4].The river sand, which makes up around 2/3rd volume of the concrete, …
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Sand Mining and Strategies for Its Management | SpringerLink
684 Accesses. 1 Citations. Abstract. Sand extraction from beaches and inland dunes and dredging from ocean and river beds have significantly increased in …
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Mechanical characteristics and energy dissipation characteristics …
P.O 42.5 ordinary Portland cement with specific surface area of 326.7 m 2 /kg and density of 3.09 g/cm 3, class F fly ash with a density of 2.08 g/cm 3, crushing limestone (coarse aggregate) with the continuous gradation of 5–25 mm and manufactured sand and dredged sand as fine aggregates of are used in the test, and the apparent density of …
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Influence of manufactured sand's characteristics on its concrete …
1. With the same particle gradation and stone powder contents, the particle shape of MS has little influence on the workability, strength and frost resistance of the MS concrete. 2. Mostly, the MS concrete has higher strength than RS concrete. However, when the gradation of MS is adjusted to be similar with RS, the strength of MS.
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Shear Characteristics of Soil—Concrete Structure …
The shear characteristics of the interfaces between soil and concrete structures are essential for the safety of the structures. In this study, a large-scale direct shear test apparatus was developed to …
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Waste Foundry Sand in Concrete Production Instead of Natural River Sand
Figure 8 shows WA of concrete with different doses of WFS. A study reported that WA reduced with the replacement of WFS [ 35 ]. Ahmad et al. [ 39] found 5.4%, 5.8%, 6.4%, and 6.6% on concrete which contains 10%, 20%, 30% & 40% of waste foundry sand at 28 days of age as in comparison to control concrete mix. Figure 8.
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Effects of fiber properties on flexural and fracture characteristics …
Fiber-reinforced concrete (FRC) with natural sand (NS) as fine aggregate has been regarded as an favorable cementitious composites in engineering application due to its superior mechanical and fracture properties, etc.As a promising substitution for NS in conventional concrete, manufactured sand (MS) presents great potential in minimizing …
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Bond characteristics of quartz sand modified enamel …
The concrete was made with Type I Portland cement, tap water, crushed stone, and river sand, and the detailed mix proportions are summarized in Table 3. The sand has a fineness modulus of 2.6 and the maximum size is 2.0 mm. The crushed stone is 5–15 mm continuous grading. Plywood mold was used to cast the specimen as shown in …
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Toughness and Microstructure of Sand Concrete
Abstract: The fracture toughness of sand concrete is affected by aggregate characteristics. In order to study the possibility of exploiting tailings sand, available in …
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Developing green and economical low-alkalinity seawater sea sand …
The mix ratio of the concrete is also advised to be designed according to the requirement of various structures. 5. Conclusion. This study proposes an innovative method of processing sediment as a supplementary cementitious material, thereby promoting the development of sustainable seawater and sea sand concrete.
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(PDF) Study the mechanical and physical properties of sand …
Guettala Abdelhamid. Université de Biskra. Abstract and Figures. This research work deals with the effect of using crushed sand resulting from quarry waste on …
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Effects of fiber properties on flexural and fracture characteristics …
2.3. Specimen preparation. The mixing and preparation of FRMSC was carried out in accordance with the standards GB/T14902-2012 [42] and JG/T472-2015 [43].To ensure a homogeneous structure and alleviate fiber agglomeration, all concrete mixtures were blended using a mixer according to following procedures: (1) Dry components including …
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River Sand Characterization for Its Use in Concrete: A Revue
River sand is a common construction material, but not all river sands are suitable for use in concrete. The characteristics of river sand can vary greatly depending on its origin, and certain properties need to be considered before using it in concrete. ... Zhu, Q. (2022) River-Sand Mining: An Ethnography of Resource Conflict in China. Open ...
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