1 A sustainable solution to excessive river sand mining by utilizing by-products in concrete manufacturing: A state-of-the-art review Hong Lich Dinh, Jiarui Liu, Dominic E.L. Ong, and Jeung-Hwan Doh*
The mining industry produces a large amount of stone waste and tailings, which poses a threat to the environment. ... benefits of mine tailings-based geopolymer composites for building applications utilizing mine tailings as suitable concrete material. This review paper also highlights knowledge gaps that must be overcome to progress …
Wang et al. [34] investigated the radiation resistance performance of concrete prepared by peridotite containing 12.95 wt% crystal water, which was tested using a 241 Am-Be neutron source. It has been shown that the neutron decay rate in ordinary concrete is almost half that of peridotite concrete under the same thickness [34].
Mix design and characteristics evaluation of high-performance concrete with full aeolian sand based on the packing density theory ... With the westward movement of highway construction in China and the gradual increase of restrictions on aggregate mining, high-quality construction materials are scarce in desertification areas, which …
This review critically evaluates the potential of Waste Foundry Sand (WFS) as a substitute for fine aggregate in concrete, conducting a comparative analysis of its physical and chemical properties against those of natural sand. The study synthesizes findings from various research experiments to determine concrete's most effective WFS replacement …
The study aims to address the depletion of river sand by integrating sea sand as a fine aggregate in the production of Self-Compacting Concrete (SCC) through a …
Great Sand Dunes, Colorado: The gold, beige, and reddish tones comes from the blend of quartz, feldspar, and magnetite. Uses of Sand. Sand is integral to numerous industries and daily life applications: Construction: Concrete production, paving, and glassmaking. Water Filtration: Used in water purification processes.
Discover how sand mining is a growing problem, exhausting a finite resource at a great cost to the planet. ... Sand is the foundation of human construction and a fundamental ingredient in concrete, asphalt, glass and other building materials. But sand, like other natural resources, is limited and its ungoverned extraction is driving erosion ...
The practice of extracting sediments is described in the Sub-Saharan African literature in a variety of ways. The most commonly used term 'sand mining' refers to the general process of extracting sand from its original location.Mining involves the removal of sand from the earth's surface such as beaches, dunes, or quarries (open pits for mineral …
Therefore, this study explores the technical and economic feasibility of using mining waste mate-rial or tailings sands as substitute fine aggregate in the design of …
China used more sand for concrete production in 2011 and 2013 than ... Kumar, B.; Sarma, A.K. Impact of sand mining on alluvial channel flow characteristics. Ecol. ... Sand Mining and Related ...
When recycled aggregate is used for concrete manufacture, in many cases these aggregates are accompanied by a recycled sand content. This research focuses on concretes prepared with recycled sand content. First, the research examined the effects of recycled sand content on the characteristics of mortar—density and compressive and …
1. Introduction. In recent years, as the scale of China's infrastructure construction continues to expand, concrete has become a widely used construction material [].In 2020, China produced 2.5 billion m 3 of concrete, which consumed nearly 1.65 billion tons of sand and gravel, including a large number of natural river sand (RS) …
With the proposed mix ratio design method, the different grades C30, C40, and C50 of manufactured sand concrete were designed. Furthermore, the properties …
2.3.2. Dry and wet cycle tests. The DWCs test was based on the Chinese standard (GB/T50082–2009). The ASC with different carbonation times was soaked in a NaCl solution of 3.5% for 15±0.5 h, and the specimens were immediately put into an oven (80±5) ℃ to dry for 6 h and naturally cooled for 2 h after removing the specimens and …
The influence of concrete pore distribution on the mechanics and water transport characteristics of sea-sand concrete was analyzed. The volume ratio and pore volume ratio of each solid composition in concrete was studied. ... Mining Sci. Technol., 21 (1) (2011), pp. 123-127, 10.1016/j.mstc.2010.07.003. View in Scopus Google Scholar …
This paper explores the use of treated desert sand as a renewable and cost-effective alternative to river sand in concrete production. It examines the impact of desert sand on the mechanical and microstructural properties of concrete, as well as its …
Types of Sand & Classification of Sand. Followings are the classification of Sand: Based on the grain size of the particle, sand is classified as Fine Sand(0.075 to 0.425mm), Medium Sand(0.425 to 2mm), and Coarse Sand(2.0 mm to 4.75mm) Based on origin, sand is classified as Pit sand, River sand, Sea sand, and manufactured sand.
Abstract. This work examines the mechanical properties of mining tailing sands in conventional concrete mixtures for structural applications. Mining is one of …
Mining companies extract frac sand, also known as industrial sand or silica sand, by locating and mining sand deposits rich in silica suitable for hydraulic fracturing. Frac sand is a vital component in the oil and natural gas extraction industry, as it props open underground fissures created during extraction, facilitating the release of ...
Sand mining is the extraction of sand, mainly through an open pit but sometimes mined from beaches and inland dunes or dredged from ocean and river …
The processed sediment is then employed to prepare sustainable seawater sea sand concrete by partially replacing cement, and a seawater sea sand concrete design model considering mechanical properties and environmental performance is proposed for various application scenarios. 2. Experimental program2.1. Raw materials
[Show full abstract] sand (quarry, river, mining and marine sand) with two conventional binders (PEN 50/60 & 80/100) and four polymer modified bitumen (PM1_76 & PM1_82 and PM2_76 & PM2_82) were ...
The concrete wet spraying machine unit is produced and provided by Shandong Wetlab mining equipment Co., Ltd. The concrete wet spraying machine adopts double plunger pumping wet shotcreting structure and the hydraulic driving mode, with a production capacity of 8 m 3 /h, as shown in Fig. 2. The shotcrete piston pump can …
Developing sustainable sand can solve environmental issues caused by excessive river sand mining. For this purpose, four types of sustainable sand have been developed. ... A comparative study of strength and durability characteristics of concrete and mortar admixture by bacterial calcite precipitation: a review. Mater. Today.: Proc. (2023 ...
1.Introduction. The radiation emitted by nuclear facilities poses a significant threat to human health, thus it's crucial to consider protection against the harmful radiations emitted from radiation-emitting devices [1], [2], [3].Due to its abundant raw material sources, controllable shaping, and excellent structural properties, concrete is one of the most widely used …
1. Introduction. Lightweight concrete (LWC) has been used for structural purposes for many years. The density of LWC typically ranges from 1400 to 2000 kg/m 3 compared with that of 2400 kg/m 3 for normal weight concrete (NWC). Some of the techniques used for producing LWC include using natural lightweight aggregates such …
Sand is a vital natural resource of our ecosystem, yet the construction industry is threatening its availability. Excessive mining of sand imposes adverse effects on our environment, and this problem is becoming extremely severe as it is exposing the river ecosystem and endangering marine biodiversity across the world (i.e., Tamil Nadu in …
Here, we present a new perspective on global sand sustainability that shifts the focus from solely evaluating local impacts of sand mining to understanding the entire sand-supply network (SSN) of a region as a …
In order to decrease the transportation expenditure of ordinary medium sand, protect natural environment, reasonably use local desert sand resources, and reduce …
Therefore, sea sand can potentially replace river sand in concrete applications. If seawater and sea sand are used to replace freshwater and river sand, it will greatly ease the current situation of resource tension in China. Since Teng et al. [2] first advocated that FRP bars could be used for seawater and sea sand concrete structures
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 …
In the marine environment, concrete in both submerged zone and non-submerged zone could be attacked by seawater. To study the deterioration of sea-sand concrete partially submerged in seawater, an accelerated test with simulated marine environment was designed for seawater and siliceous sea-sand concrete (SSC), coral …
On the other hand, Manufactured Sand (M−Sand), offshore sand, quarry dust, and sea sand are identified as the common rock-derived and sea-based mineral alternatives for river sand replacement. [4], [8], [11], [12] To reduce the demand for fine aggregate, dredged marine sands can be used as an alternative for fine aggregate in the ...
A concrete plant would need a steady stream of aggregate. Owen suggests that 100 km (60 mi) is a practical maximum distance for hauling by truck. The increasing costs and difficulties of using and the depletion of subaerial deposits contribute to the increased exploitation of the offshore resources. ... Sand Mining, Table 1 Characteristics of ...
Incorporation of steel fibers to improve the defects of manufactured sand concrete (MSC) has received a great deal of attention, while the fracture mechanism of the MSC by volume fraction of steel fibers (V f) has been less studied.To investigate the effects of steel fibers on the fracture characteristics of the MSC, three-point bending tests …
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 …
Recycled concrete with manufactured sand (RCM) is a type of recycled concrete that uses manufactured sand as fine aggregate, and there have been limited reports on the investigation of its high temperature performance in the construction industry.
The cost of 1 m³ of control concrete is 53.68 USD and total replacement of sand with SFS-M is 48.62 USD. The SFS-M concrete shows a cost reduction of 9.5%. Replacement of natural sand with SFS-M reduces the cost of concrete production, and the concrete meets all requirements for its use as hexagonal concrete blocks for light traffic.