Comparative study of the mechanical and thermal properties of lightweight cementitious composites

Brooks, Adam L.; Zhou, Hongyu; Hanna, Dominic

doi:10.1016/j.conbuildmat.2017.10.102

Cited by 117 publications

(54 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Waste EPS beads do not contribute toward resisting the external deformation and produce greater strain under the same loading conditions. The present finding is consistent with those reached by previous works [21,23,69].…”

Section: Mechanical Propertiessupporting

confidence: 94%

“…Some studies have partially replaced mineral aggregates in concrete with waste EPS beads to improve building insulation properties, which reduces the amount of waste EPS beads discarded into landfills [20,21]. However, previous studies focused mainly on wall claddings, board, partitions, and other non-structural elements [11,[22][23][24][25][26]. Thermal conductivity, density, and compressive strength of EPS beads as reported in previous literatures are summarized in Table 1 [23,[27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…However, previous studies focused mainly on wall claddings, board, partitions, and other non-structural elements [11,[22][23][24][25][26]. Thermal conductivity, density, and compressive strength of EPS beads as reported in previous literatures are summarized in Table 1 [23,[27][28][29][30][31][32][33][34][35]. From Table 1, EPS beads improve the thermal insulation of concrete when serving as lightweight aggregates, but reduce its strength as the content increases.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

Long¹,

Lin²,

Tan³

et al. 2020

Materials

View full text Add to dashboard Cite

Development of low thermal conductivity and high strength building materials is an emerging strategy to solve the heavy energy consumption of buildings. This study develops sustainable alkali activated materials (AAMs) for structural members from waste expanded polystyrene (EPS) beads and reduced graphene oxide (rGO) to simultaneously meet the thermal insulation and mechanical requirements of building energy conservation. It was found that the thermal conductivity of AAMs with 80 vol.% EPS and 0.04 wt.% rGO (E8–G4) decreased by 74% compared to the AAMs without EPS and rGO (E0). The 28-day compressive and flexural strengths of E8–G4 increased by 29.8% and 26.5% with the addition of 80 vol.% EPS and 0.04 wt.% rGO, compared to the sample with 80 vol.% EPS without rGO (E8). In terms of compressive strength, thermal conductivity, and cost, the efficiency index of E8–G4 was higher than those of other materials. A building model made from AAMs was designed using building information modeling (BIM) tools to simulate energy consumption, and 31.78% of total energy consumption (including heating and cooling) was saved in the building operation period in Harbin City, China. Hence, AAMs made of waste EPS beads and rGO can realize the structural and functional integrated application in the future.

show abstract

Section: Mechanical Propertiessupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

Long¹,

Lin²,

Tan³

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…Regarding concrete with low thermal conductivity, some experimental studies have been performed [6][7][8][9][10][11]. Aghdam et al [6] performed an experimental study to estimate the effects of carbon nanotubes on the thermal conductivity of steel fiber-reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Thermal Properties of High-Strength Concrete Containing CBA Fine Aggregates

Yang

Park

2020

Materials

View full text Add to dashboard Cite

The thermal conductivity of concrete is a key factor for efficient energy consumption in concrete buildings because thermal conductivity plays a significant role in heat transfer through concrete walls. This study investigated the effects of replacing fine aggregates with coal bottom ash (CBA) and the influence of curing age on the thermal properties of high-strength concrete with a compressive strength exceeding 60 MPa. The different CBA aggregate contents included 25%, 50%, 75%, and 100%, and different curing ages included 28 and 56 days. For concrete containing CBA fine aggregate, the thermal and mechanical properties, including the unit weight, thermal conductivity, compressive strength, and ultrasonic velocity, were measured. The experimental results reveal that the unit weight and thermal conductivity of the CBA concrete were highly dependent on the CBA content. The unit weight, thermal conductivity, and compressive strength of the concrete decreased as the CBA content increased. Relationships between the thermal conductivity and the unit weight, thermal conductivity and compressive strength of the CBA concrete were proposed in the form of exponential functions. The equations proposed in this study provided predictions that were in good agreement with the test results. In addition, the test results show that there was an approximately linear relationship between the thermal conductivity and ultrasonic velocity of the CBA concrete.

show abstract

“…The spherical shape of the aggregate provides a greater plasticity of mixtures and a higher compressive strength. The introduction of hollow microspheres as a filler into the composition of dry masonry mixtures makes it possible to obtain an effective composite material with high strength and thermal properties [10][11][12][13]. One of the most effective methods of obtaining such mortars is the introduction of hollow ceramic microspheres and a complex of modifying additives into their composition [14].…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of masonry mortars based on ceramic microspheres

Semenov

2018

MATEC Web Conf.

View full text Add to dashboard Cite

Modern requirements in the field of energy and resource saving determines the need to apply effective fencing structures. To ensure the thermal homogeneity of the structures erected with small-piece masonry elements (ceramic and light-weight concrete units etc.), it is necessary to use lightweight mortars. One of the most effective methods to obtain such mortars is the introduction of hollow ceramic microspheres as a filler into their composition. The purpose of this work is studying of the composition and structure of a cement masonry mortar with hollow ceramic microspheres and modifying additives in correlation with its properties. The methods of thermogravimetric analysis, scanning electron microscopy, X-ray diffraction and standard test methods for the masonry mortars were used. The effect of the structural characteristics of the composite on the properties of final product was analyzed. It is established that the microstructure of the modified mortar samples is more compact in compare with basic composition, and the surface of the microspheres is covered by the products of the chemical interaction of its walls with the cement matrix. The aforesaid research allowed to obtain the high-performance lightweight mortars with hollow ceramic microspheres.

show abstract

Comparative study of the mechanical and thermal properties of lightweight cementitious composites

Cited by 117 publications

References 35 publications

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

A Study on the Thermal Properties of High-Strength Concrete Containing CBA Fine Aggregates

Structure and properties of masonry mortars based on ceramic microspheres

Contact Info

Product

Resources

About