Properties and Microstructure Distribution of High-Performance Thermal Insulation Concrete

Mohammad, Malek; Masad, Eyad; Seers, Thomas; Al-Ghamdi, Sami G.

doi:10.3390/ma13092091

Cited by 19 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Replacing the aggregate with the EPS particles increased the total porosity of the samples and decreased the thermal conductivity. This results is in line with the literature [20]. Thus, as seen in Figure 1, there is a linear relationship between the unit weights of the samples and their thermal conductivity, as in many studies [19,21].…”

Section: Unit Weight Water Absorption and Thermal Conductivitysupporting

confidence: 91%

Comparison of Mechanical and Physical Properties of Screed with and without Expanded Polystyrene (EPS) Particles

KILIÇ

Yorulmaz

ÖZUZUN

et al. 2022

Environmental Research and Technology

View full text Add to dashboard Cite

In this study, in order to observe the mechanical and physical properties of normal screed, sandy-lightweight screed and lightweight screed samples, expanded polystyrene (EPS) was used as fine aggregate and lightweight screed systems was produced by replacing sand at 100%, 50% and 0% by weight. Samples of cement dosages of 250, 300, 350 kg/m3 were produced for lightweight screeds, sandy-lightweight screeds and normal screeds. Unit weight, water absorption capacity, flexural strength, compressive strength, fire resistance, abrasion and thermal conductivity tests were performed on the produced screed systems. As a result of the research, it was determined that as EPS ratio increases in screed system; unit weights decreased, water absorption rates increased. Besides, the flexural and compressive strengths, fire and abrasion resistance are also decreased. However, it was observed that the thermal conductivity coefficient reduced with the increment of EPS particles in the screed. In normal, sandy-lightweight and lightweight screeds, it was determined that as the cement dosage increased; the unit weights, flexural and compressive strengths, fire and abrasion resistance increased, water absorption capacity and the thermal conductivity coefficient decreased.

show abstract

Section: Unit Weight Water Absorption and Thermal Conductivitysupporting

confidence: 91%

Comparison of Mechanical and Physical Properties of Screed with and without Expanded Polystyrene (EPS) Particles

KILIÇ

Yorulmaz

ÖZUZUN

et al. 2022

Environmental Research and Technology

View full text Add to dashboard Cite

show abstract

“…The other correlation, Equation (5), is recommended by the American Concrete Institute (the red line in Figure 9). The equation proposed by the ACI committee [35] is recommended for non-structural lightweight concretes and seems to reflect the present results with satisfactory accuracy.…”

Section: Resultssupporting

confidence: 69%

“…Equation (4) was derived from 185 experimental data points [ 35 ]. This relationship is presented as a black line in Figure 9 .…”

Section: Resultsmentioning

confidence: 99%

“…The transient method is dependent on time and the temperature changes over time. Researchers have measured the conductivity of cement-based materials with transient methods, and results were presented in [ 35 ]. The availability and cost of equipment, time for experimental measurements and measurement ability for moist specimens may be some of the reasons for using this method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurements of Thermal Conductivity of LWC Cement Composites Using Simplified Laboratory Scale Method

et al. 2021

View full text Add to dashboard Cite

The implementation of low-energy construction includes aspects related to technological and material research regarding thermal insulation. New solutions are sought, firstly, to reduce heat losses and, secondly, to improve the environment conditions in isolated rooms. The effective heat resistance of insulating materials is inversely proportional to temperature and humidity. Cement composites filled with lightweight artificial aggregates may be a suitable material. Selecting a proper method for measuring the thermal conductivity of concrete is important to achieve accurate values for calculating the energy consumption of buildings. The steady state and transient methods are considered the two main thermal conductivity measurement approaches. Steady state is a constant heat transfer, whereby the temperature or heat flow is time independent. In the transient method, temperature changes over time. Most researchers have measured the conductivity of cement-based materials based on transient methods. The availability and cost of equipment, time for experimental measurements and measurement ability for moist specimens may be some of the reasons for using this method. However, considering the accuracy of the measurements, the steady state methods are more reliable, especially for testing dry materials. Four types of composites were investigated that differed in filler: natural aggregate, sintered fly ash filler, sintered clay and granular foam glass aggregate. The method of preparing the samples for testing is especially important for the obtained results. The samples, with a specific surface roughness, will show a lower coefficient of thermal conductivity by 20–30%; therefore, the selection of the type of contact layer between the plate of the measuring device and the sample is of particular importance.

show abstract

“…Expanded perlite has many uses, and as of present day 90% of its consumption is assigned to the building materials industry and the remaining 10% to agriculture and horticulture. Most applications of expanded perlite are related to its thermal insulation properties [37][38][39][40][41][42][43]. The perlite concrete block used for the study is a new product, currently in the testing phase, designed to function as a self-supporting wall with the thermal conductance determined by the regulations and adopted for passive and energy-efficient buildings.…”

Section: Methodsmentioning

confidence: 99%

Influence of Variable Moisture Conditions on the Value of the Thermal Conductivity of Selected Insulation Materials Used in Passive Buildings

et al. 2022

View full text Add to dashboard Cite

The interest in passive construction that has low demand for thermal energy continues to grow every year. It is related to both the reduction in maintenance costs of buildings and the growing environmental awareness in societies. Passive houses are characterised by very good thermal insulation properties of their external partitions. This paper presents the results of tests on the thermal conductivity for three different types of building materials, assuming their use as thermal insulation. The materials were subjected to water absorption tests during long-term immersion. The purpose of this study was to simulate water absorption caused by long-term water exposure. The tests were carried out on a perlite concrete block, a sheet of polyurethane foam applied by spraying and expanded clay in a loose form in three different fractions. The tested insulation materials were selected due to their different form, structure, and porosity characteristics, which largely determined the value of the thermal conductivity. A perlite concrete block is a new, innovative product, of which manufacturer’s data are not yet available as the product is currently at the stage of detailed research. The results were analysed statistically and used in graphs to show the dependence of the value of the thermal conductivity on moisture content of the samples. The purpose of this study was to indicate the importance of the proper incorporation of insulation materials into buildings, their storage before construction and use in the post-construction phase. Building standards for passive houses place high demands on materials used. In order to fully enjoy the advantages of passive buildings, i.e., lower energy consumption and benefits for the natural environment due to lower consumption of energy generated from non-renewable energy sources, it is necessary to use certified building materials and ensure proper use of objects. The studies quoted in this paper indicate to what extent the influence of moisture content negatively affects the properties of insulation materials in external partitions.

show abstract

Properties and Microstructure Distribution of High-Performance Thermal Insulation Concrete

Cited by 19 publications

References 37 publications

Comparison of Mechanical and Physical Properties of Screed with and without Expanded Polystyrene (EPS) Particles

Comparison of Mechanical and Physical Properties of Screed with and without Expanded Polystyrene (EPS) Particles

Measurements of Thermal Conductivity of LWC Cement Composites Using Simplified Laboratory Scale Method

Influence of Variable Moisture Conditions on the Value of the Thermal Conductivity of Selected Insulation Materials Used in Passive Buildings

Contact Info

Product

Resources

About