Effect of Porous Structure on Sound Absorption of Cellular Concrete

Fediuk, Roman; Baranov, Andrey; Amran, Yusuf

doi:10.34031/2618-7183-2020-3-2-5-18

Cited by 12 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To control the structure formation of the cement composite, it is necessary to use new raw materials. Taking into account that huge dumps of hydro-removed ash-and-slag mix have been accumulated in Russia, the authors have developed a technology for their four-stage purification followed by the production of an aluminosilicate additive (AD), as mentioned earlier [29].With the use of AD, as well as two types of aggregates, compositions of insulating, structuralinsulating, and structural cellular concrete were developed (Table 1). Compositions 1, 3, 5, 7, 9, 11 were used to make foam concrete, and compositions 2, 4, 6, 8, 10 and 12 were used for aerated concrete.…”

Section: Resultsmentioning

confidence: 99%

Performances of High Porous Cellular Concrete

Fediuk

Baranov

Ilinsky

et al. 2020

Construction Materials and Products

Self Cite

View full text Add to dashboard Cite

The widespread use of cellular concrete for enclosing structures forces researchers to develop ways to im-prove their performance and durability. Compositions of aerated and foam concrete with the use of waste heat power engineering have been developed. The optimal formulation ratios have been identified that con-tribute to the creation of a rigid interpore matrix and water-repellent pore protection. The regularities of the synthesis of aerated concrete and foam concrete were established, which consist in optimizing the processes of structure formation through the use of a polymineral cement-ash binder and a pore-forming agent. The mix composition intensifies the process of hydration of the system, which leads to the synthesis of a poly-mineral highly porous heterodispersed matrix. The increased activity and granulometry of aluminosilicates predetermine an increase in the number of contacts and mechanical adhesion between particles during com-paction, strengthening the framework of the interpore partitions. The mechanism of the influence of the composition of the concrete mix on the microstructure of the composite is established. The calculated sound insulation of airborne noise shows sufficient characteristics for using aerated concrete blocks as enclosing structures. One of the main advantages of aerated concrete is its low thermal conductivity, which is especial-ly important from the point of view of ensuring the energy efficiency of buildings and structures. Even in spite of the high values of open porosity of the developed aerated concrete, the rigid frame makes it possible to achieve almost 2 times higher frost resistance characteristics than that of the reference specimen

show abstract

Section: Resultsmentioning

confidence: 99%

Performances of High Porous Cellular Concrete

Fediuk

Baranov

Ilinsky

et al. 2020

Construction Materials and Products

Self Cite

View full text Add to dashboard Cite

show abstract

“…Several factors affect the concrete thermal conductivity [55]. For instance, the type of aggregate [56,57], the properties of cementitious materials [58][59][60][61][62][63][64][65][66], moisture content [67,68], design buildup [69][70][71][72][73][74], temperature [75,76], concrete density [12,[77][78][79][80], etc. The measurement of concrete thermal conduction is divided into steady-state and transient methods [81].…”

Section: Thermal Conductivitymentioning

confidence: 99%

Thermal Behavior and Energy Efficiency of Modified Concretes in the Tropical Climate: A Systemic Review

et al. 2021

View full text Add to dashboard Cite

Concrete remains the most utilised construction material for building envelopes, which regulate the indoor temperature to achieve human thermal comfort. Often, the energy consumption for building performance appraisal is related to the thermal behaviour of building materials as heating, ventilation, and air conditioning systems all variously contribute to human comfort. Following the development of concrete technology, many types of concrete have been invented to serve several purposes in the construction industry. To clearly understand the concrete type tailored for the specifics of a construction project, the local climate, concrete mechanical properties, and concrete thermal behaviours should be primarily identified to achieve energy efficiency, which also suits the sustainability of global materials. This paper, therefore, reviews the modified concrete thermal behaviours in the tropical climate for more systematic city planning in order to achieve better energy efficiency. Urban heat islands in the tropics and contributing factors, as well as heat transfer mechanisms, are first highlighted. The requirements of concrete thermal behaviour for building envelopes are then discussed through specific heat capacity, thermal conductivity, thermal diffusivity, time lag, and decrement factor in the context of applications and energy consumption in the tropical regions. With a case study, it is found that concrete thermal behaviours directly affect the energy consumption attributed mainly to the use of cooling systems in the tropics. The study can be a reference to mitigating the urban heat island phenomenon in the planning of urban development.

show abstract

“…Numerous developments in recent years are devoted to expanding the raw material base of porous aggregates for lightweight concrete [40][41][42][43][44][45]. The technology of granulated glass-ceramic foam materials from silica industrial waste is actively developing [46,47].…”

Section: Introductionmentioning

confidence: 99%

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

2021

View full text Add to dashboard Cite

The article is devoted to the development of resource-saving technology of porous granular materials for energy-efficient construction. The relevance of the work for international research is to emphasize expanding the raw material base of porous lightweight concrete aggregates at the expense of technogenic and substandard materials. The work aims to study the processes of porization of glass crystalline granules from polymineral raw materials mixtures. The novelty of the work lies in the establishment of regularities of thermal foaming of glass crystalline granules when using waste of magnetic separation of skarn-magnetite (WMS) ores and lignite clay. Studies of liquid glass mixtures with various mineral fillers revealed the possibility of the formation of a porous structure with the participation of opoka, WMS and lignite clay. This is due to the presence in the materials of substances that exhibit thermal activity with the release of a gas phase. The foaming efficiency of the investigated materials increases when combined with glass breakage. The addition of WMS and lignite clay to the glass mixture increases the pore size in comparison with foam glass. The influence of the composition of raw mixtures on the molding and stability of granules is determined. The addition of sodium carbonate helps to strengthen the raw granules and reduce the softening temperature of the mass. The composition of the molding mixture of glass breakage, liquid glass and a multicomponent additive is developed, which provides an improvement in the molding properties of the glass mass, foaming of granules at a temperature of 750 °C. Foam glass crystalline granules have polymodal porosity, characterized by a density of 330–350 kg/m3, a compressive strength of 3.2–3.7 MPa, and a thermal conductivity of 0.057–0.061 W/(m·°C). Accordingly, the developed granules have a high potential use in structural and heat-insulating concretes.

show abstract

Effect of Porous Structure on Sound Absorption of Cellular Concrete

Cited by 12 publications

References 10 publications

Performances of High Porous Cellular Concrete

Performances of High Porous Cellular Concrete

Thermal Behavior and Energy Efficiency of Modified Concretes in the Tropical Climate: A Systemic Review

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

Contact Info

Product

Resources

About