Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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This paper investigates the effect of the bauxite sand and coarse aggregate on the quasi-static mechanical properties and resistance against high-velocity projectile impact of cement composites with 28-day compressive strengths from 34.2 to 197.2 MPa, in comparison to that of the siliceous sand and granite coarse aggregate.
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Portable Tertiary Impact Crushers are wheel-mounted rock crushing machines, engineered for tertiary crushing applications. Equipped with a horizontal shaft impact crusher and a …
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High velocity impact dynamicsjedited by Jonas A. Zukas. p. em . .. A Wiley-Interscience publication." Includes bibliographical references. ISBN 0-471-51444-6 I. Impact. 2. Structural dynamics.
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Parker tracked impact crushers are available in a range of sizes for medium to high volume primary and secondary crushing duties where high performance, reliability, and mobility …
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Projectile impact, Deformable, Penetration depth, Hardness, Bauxite, Ultra-high performance concrete (UHPC), K&C model, Dynamic increase factor (DIF) Issue Date: 7-Dec-2020: Citation: ZHANG FENGLING (). RESISTANCE OF CEMENT-BASED MATERIALS AGAINST HIGH-VELOCITY PROJECTILE IMPACT. ScholarBank@NUS …
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Under low-velocity impact, the concrete structure experiences a significant load change in a short time. As a result, the concrete structure tends to crack along the direction of its plastic hinge. High-velocity impact, also known as high-velocity penetration, results in
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Targets made of high-performance steel fiber-reinforced concrete (HPSFRC), which was produced by fluidized mortar, steel fibers and casting process of mortar infiltrating and vibrating, were subject to high velocity impact of projectile and compared with those targets made of reinforced high strength concrete (RHSC).
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Tensile strength versus toughness of cement-based materials against high-velocity projectile impact: dc.contributor.author: Wang, S. dc.contributor.author: ... Tensile strength versus toughness of cement-based materials against high-velocity projectile impact. International Journal of Protective Structures 2 (2) : 207-220. ScholarBank@NUS ...
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International Journal of Impact Engineering 31 (2005) 825–841 Resistance of high-strength concrete to projectile impact M.H. Zhanga,*, V.P.W. Shimb,G.Lua, C.W. Chewa aDepartment of Civil Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576, Singapore bDepartment of Mechanical Engineering, National …
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As the impact of projectiles, aircraft, detonation fragments, and debris poses a possible threat to concrete structures, the penetration into concrete has already been investigated for a long time (Yankelevsky, 2017), with the considered impact velocities reaching the hypervelocity range (Atoua et al., 2013; Dawson et al., 2008).In …
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High-velocity impact welding is a kind of solid-state welding process that is one of the solutions for the joining of dissimilar materials that avoids intermetallics. Five main methods have been developed to date. These are gas gun welding (GGW), explosive welding (EXW), magnetic pulse welding (MPW), vaporizing foil actuator welding (VFAW), and …
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1400-Watt electric demolition concrete breaker engineered with a powerful 12.5 Amp motor that delivers up to 10.5 ft. lbs. of Torque power; Maximum impact rate of 3800 r/minute and 1400-Watt of consistent power gives you enough power to tackle the toughest of demolition projects
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This experimental research aims to evaluate the impact resistance of the crimped wire mesh‐ and steel fiber‐reinforced concrete panels that receive the impact load of the high‐velocity projectile. The concrete panel's impact resistance was evaluated by using variables such as the steel fiber volume fraction, presence of crimped wire ...
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Damage evaluation of concrete plates by high-velocity impact M. Beppua,*, K. Miwaa,M.Itohb, M. Katayamab, T. Ohnoa aDepartment of Civil and Environmental Engineering, National Defense Academy, Hashirimizu 1-10-20, Yokosuka 239-8686, Japan b Impact Dynamics & Material Science Team, Energy & Industrial Systems Department, …
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impact velocity of 415 m/sec. The velocities of the high strength concrete rapidly decrease and rebound can be seen in all cases. Figure 6 shows the time histories of energy of entire model in the case of impact velocity of 415 m/sec. Figure 6 is a case with impact velocity of 415m/sec and an increase of the kinetic energy by the
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As one of the most commonly used construction materials, concrete has been widely investigated for severe loading conditions such as impact and blast. In these investigations, the localized damage on concrete caused by high-velocity projectile impact (HVPI), especially the penetration depth, has always been a concern.
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High velocity projectile impact (HVPI) test was carried out on three classes of cement composites to assess their performance. The tests were conducted on thick block specimens using non-deformable ogive-nosed projectiles with a mass of 250 g and a diameter of 28 mm at approximately 400 m/s. ... Experimental and numerical studies of …
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(PDF) Effect of bauxite aggregate in cement composites on ... properties and resistance against high-velocity projectile impact of cement composites with 28-day 8 compressive strengths from 34.2 to 197.2 MPa, in comparison to that of the siliceous sand and ...
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DOI: 10.1016/j.ijimpeng.2020.103629 Corpus ID: 219756294; Resistance of cement-based materials against high-velocity small caliber deformable projectile impact @article{Zhang2020ResistanceOC, title={Resistance of cement-based materials against high-velocity small caliber deformable projectile impact}, author={Fengling Zhang and …
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However, rebound velocity initially increases slightly with increase in impact velocity, but drastically decreases after impact velocity exceeds 90 m/s. That said, when impact velocity is increased from 50 m/s to 110 m/s, the absorbed energy increases from 0.02 J to 0.45 J and the energy absorbing ratio also increases from 22% to 86%.
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The ultra-high impact velocity and extreme impact pressure can cause considerable damage to the impact area of the composite ceramic, resulting in the formation of a concentrated damage area. ... SHPB test and microstructure analysis on ready-mixed concrete in uniaxial load and passive confining pressure states. Shock …
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618 P. Gülkan and H. Korucu article is to confirm that the extreme damage caused by a supersonic-velocity projectile penetrating a concrete target can be predicted with reasonable accuracy.
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Hurricane Windows, Storm Windows, Impact Windows When it comes to hurricane protection, there is no substitute for the Category 5 line of hurricane systems. According to NOAA, Hurricane glass is "no substitute for shutters". However, the technology is improving every year in all facets of disaster mitigation. We recommend the Category 5 line of …
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To better meet the functional requirement for impact- and blast-resistant structures, high modulus steel fibers (fiber 1) and low modulus polyethylene fibers (fiber 2) are used in …
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High-velocity impact Local damage Concrete plate Numerical simulation. This paper describes the evaluation of the local damage of concrete plates by the impact of high …
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The local damage of concrete plates is commonly classified into three modes, cratering, spalling and perforation as shown in Fig. 6. Fig. 7 shows the corresponding damage modes observed by our experimental tests. The thickness of each plate is 8. cm. Apparent cratering damage has been observed in the case of the impact …
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breaker. When working in hard material we recommend a 7,500 - 10,000-ft.lb. breaker, and if high production is critical, a 13,500-ft.lb. breaker would be beneficial. BREAKING CONCRETE: When breaking Concrete, the breaker is expected to penetrate the material, allowing it to crack and shake loose from the reinforcing steel.
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Aircraft Production Laboratory and High Velocity Impact Test Laboratory at Aerospace Engineering Department are developed with singular effort of Prof. N. K. Naik. These are unique laboratories. As a part of research …
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High production pavement breaking 2 blows per second at 7 mph Break 10-inch thick concrete into 18-inch pieces at up to 3,520 sq. yd./ hr. "As a concrete pavement …
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PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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