Basalt fiber-reinforced foam concrete containing silica fume: An experimental study

Gençel, Osman; Nodehi, Mehrab; Bayraktar, Oğuzhan Yavuz; Kaplan, Gökhan; Benli, Ahmet; Gholampour, Aliakbar; Ozbakkaloglu, Togay

doi:10.1016/j.conbuildmat.2022.126861

Cited by 136 publications

(37 citation statements)

References 85 publications

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“…Microsilica acts as a filler, it provides a denser packing of particles, and also promotes the additional formation of calcium silicate hydrate (CSH) [ 36 , 49 , 50 , 51 ]. Thus, a larger amount of CSH contributes to a denser packing of particles of inert components in the material of the interpore wall as well as faster curing of foam concrete and, accordingly, higher values of compressive strength [ 30 , 52 , 53 ].…”

Section: Resultsmentioning

confidence: 99%

“…In [ 30 ], the authors studied the effect of microsilica and basalt fiber on the mechanical characteristics of foam concrete. According to the results of experimental studies, it was found that the addition of 15% microsilica increased the compressive strength up to 46%, while increasing the content of basalt fiber from 0 to 3% increased the bending strength up to 88%.…”

Section: Resultsmentioning

confidence: 99%

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Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

et al. 2022

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Some of the primary problems of construction are brittleness and low the mechanical properties of good thermal insulation materials. Heat-insulating foam concrete has a low thermal conductivity. However, it is practically impossible to transport it over long distances since corners are cracked during transportation, the structure is broken, and, in principle, the fragility of this material is a big problem for modern buildings. The purpose of this study was to develop a heat-insulating foam concrete with improved characteristics by experimentally selecting the optimal dosage of polypropylene fiber and a nanomodifying microsilica additive. Standard methods for determining the characteristics of fiber foam concrete were used as well as the method of optical microscopy to study the structure of the composite. It has been established that the use of polypropylene fiber with the optimal reinforcement range from 1% to 3% allows us to achieve an improvement in the mechanical and physical characteristics of fiber foam concrete. The optimal dosage of the nanomodifier introduced instead of a part of the binder (10%) and polypropylene fiber (2%) by weight of the binder was determined. The maximum values of increments in mechanical characteristics were 44% for compressive strength and 73% for tensile strength in bending. The values of the thermal conductivity coefficient at optimal dosages of the nanomodifier and fiber decreased by 9%. The absence of microcracking at the phase boundary between the polypropylene fiber and the hardened cement–sand matrix due to nanomodification was noted.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

et al. 2022

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“…Cost and characteristics of concrete can significantly vary depending on the additives used [41][42][43]. Aiming to reduce the input costs in construction industry, several additives are used in order to decrease the cost of concrete that is the input, which affects the cost at most, among the additives [44][45][46]. The use of these additives causes an acceptable level of change in the cement characteristics and, sometimes, it may even give superior mechanical properties depending on the area of use of concrete [47,48].…”

Section: Discussionmentioning

confidence: 99%

Usability of Organic Wastes in Concrete Production; Palm Leaf Sample

Bayraktar

2022

KUJES

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Palm leaves are vegetal waste that are not widely used by the society, only piled up and causing odors that mix with the environment. Channeling this waste material into the construction industry helps to overcome waste disposal problems as well as promote sustainability. The most important features expected from the buildings are the creation of the most suitable environmental conditions for the products to be stored or the creatures that will live in them, and they can be used safely for a long time. In the construction of the buildings, materials that are the cheapest possible, safe and capable of creating the optimum environmental conditions should be used. The materials to be selected should have sufficient strength and durability, high heat and sound insulation and lightness. Since single-storey buildings are not subject to excessive load, it is important that the thermal insulation is high and light in material selection. Since the widespread use of concrete as a building material in the world, efforts to make concrete light, cheaper and better insulating have gained importance. Lightweight concrete, which is easy to apply, has been an important building material in recent years. With the use of lightweight concrete as a building material, benefits such as economy in terms of material, earthquake resistance, and the elimination of a second insulation material for heat and sound insulation can be achieved. In this study; Experimental study using Portland cement (CEM I), Palm Leaf, CEN standard sand and water mortar production; sample production, curing, some physical and mechanical experiments were carried out in four stages. The usability of palm leaf, which is a vegetable waste, as aggregate in concrete production by replacing it with CEN standard sand at 0, 5, 10, 20, 30 and 40% as well as 10% with cement has been investigated. The study results show that the addition of both ground palm leaf and palm leaf aggregate significantly altered almost all properties of concrete. These changes are at different levels in terms of physical properties. As a result of the study, it was determined that as the amount of foam increased, the spreading diameter increased, whereas palm leaf addition decreased the spreading diameter. It has been determined that the addition of palm leaf decreases the depth of water treatment depending on time, the porosity of the samples with high level of palm leaf addition increases and the compression and bending strength decreases.

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“…This is because when the initial stress is high, the fragmentation degree of foamed concrete is higher, and more energy is absorbed due to fragmentation [ 10 ]. In addition to increasing the coating thickness of foamed concrete, doping fiber [ 34 , 35 , 36 ], using composite structures [ 37 , 38 , 39 ] or higher density [ 11 ], can also improve the energy absorption ability of foamed concrete.…”

Section: Discussionmentioning

confidence: 99%

Influence Mechanism of Foamed Concrete Coating Thickness on the Blast Resistance of RC Walls

Shang

Huang

et al. 2022

Materials

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How to effectively reduce the damage of frequent accidental explosions and explosion attacks to existing walls is an important concern of the blast resistance field. In the present study, the influence of the foamed concrete (density 820 kg/m3, water-cement ratio 0.4) coating thickness on the blast resistance of a 120 mm RC (reinforced concrete) wall was studied through blast experiments, numerical simulations, and shock wave theory. Results show that the influences of foamed concrete on the blast resistance of RC walls are jointly decided by the stress drop caused by impedance effect and exponential attenuation and the stress rise caused by high-speed impact compression. The coating thickness mainly affects the foam concrete’s fragmentation degree and stress attenuation. A lower critical coating thickness exists in foamed concrete-coated RC walls. The blast resistance of the RC wall will decrease when the coating thickness is less than that value. The lower critical coating thickness is related to the intensity of blast load and the energy absorption capacity of foamed concrete, and it can be predicted by monitoring the explosive stress and energy incident to the RC wall.

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Basalt fiber-reinforced foam concrete containing silica fume: An experimental study

Cited by 136 publications

References 85 publications

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

Usability of Organic Wastes in Concrete Production; Palm Leaf Sample

Influence Mechanism of Foamed Concrete Coating Thickness on the Blast Resistance of RC Walls

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