Magnetite aggregate is used as a absorbing material. In order to study the mechanical properties, absorbing heat and deicing efficiency and frost resistance of magnetite concrete, I prepared the magnetite aggregate concrete with 0, 20%, 40%, 60%, 80% and magnetite content, which be used to measure the compressive strength, flexural strength and …
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Concrete No. 203 2007). The results showed that, barite coarse aggregate had higher specific gravity than magnetite, goethite and serpentine. Furthermore, water absorption of goethite aggregate was several times higher than that of barite, magnetite and serpentine by 13%, 10%, and 6%, respectively.
e) TEM image of a magnetite aggregate stabilized by polyarginine. Inset 1 in e) shows the HRTEM image of the synthesized magnetite aggregate. f) TEM image of a magnetite aggregate stabilized by oleic acid. g) Scanning electron microscopy image of magnetite aggregate obtained by polycondensation.
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aggregate in fractions, 0-2 mm, 2-8mm and 8-20mm. The maximum particle size of aggregate was kept constant at 20 mm in all mixtures. The bulk density of used magnetite aggregate was 4.7 kg/m3. Reference series (R) contained river sand fine aggregate 0-2 mm and gravel coarse aggregate separated into two fractions, 2-8 mm and
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Magnetite is used in the construction industry as a naturally granular aggregate with a high bulk density (4.65 to 4.80 kg/dm 3 ) for heavy concrete and structural radiation protection. Thanks to the heavy mineral, the building material can help to attain a solid concrete density of more than 3.2 t/m 3 ; and is helpful in the construction of ...
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As an excellent absorbing material, natural magnetite with high microwave heating capacity may be used for deicing cement concrete road. In order to remove ice and snow on road surface quickly and effectively, in exploration of the microwave deicing technology, 6 kinds of concrete with different magnetite aggregate content were prepared with magnetite gravel as …
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Radiation shielding concrete, also known as heavy concrete, is a special type of concrete. By using high-density materials (such as magnetite [4][5] [6] [7][8]) as aggregates or adding various ...
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A mix containing 470 pounds of cement, 1755 pounds of coarse aggregate, 2025 pounds of medium aggregate, and 2070 pounds of fine aggregate and with a water-cement ratio of 0.53 produces concrete with a unit weight of 235 …
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The overall result shows the strength of HWSCC decreases by increasing magnetite aggregate proportions, while, in HWGC mixes, the compressive strength increased with 50% magnetite replacement ...
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Two concretes with magnetite aggregate and one ordinary concrete with natural aggregate were tested. Mechanical properties were studied at ambient temperature and after thermal exposure.
The test results are shown in Figure 10. Wang et al. prepared specimens of 0%, 20%, 40%, 60%, 80%, and content magnetite concrete; Liu et al. prepared iron black concrete with different ...
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Arizona Geological Survey Mining Data website. 1Arizona Geological Survey, University of Arizona, 1955 East Sixth Street, P.O. Box 210184, Tucson, Arizona 85721-0184 2Arizona State Mine Inspector's Office, 1700 West Washington Street, Suite 400, Phoenix, Arizona 85007-2805 Arizona Geological Survey University of Arizona
Nuclear technology benefits humans, but it also produces nuclear radiation that harms human health and the environment. Based on the modified Andreasen and Andersen particle packing model for achieving a densely compacted cementitious matrix, a new magnetite ultra-high-performance concrete (MUHPC) was designed using magnetite fine aggregate as a …
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This might be attributed to the aggregate posing lower purity [156,161], who 440 investigated the influence of w/c ratio on the RS performance of RSC blended with magnetite 441aggregates and found ...
Cement, coarse aggregate, fine aggregate, magnetite, water and ultra superplast-470 admixture were utilized. Ordinary Portland Cement (OPC) market name Askari cement brand, was used as binding ...
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Magnetite, a common microwave-absorbing material, is an outstanding microwave absorber that can be used in pavements for deicing. In this work, magnetite was scattered in functional aggregate as a microwave-deicing functional phase, and the microwave-heating aggregate (MHA) was prepared by means of sintering to realize aggregate functionalization.