Cellular concrete - A potential load-bearing insulation for cryogenic applications?

Richard, Thomas; Dobogai, J.; Gerhardt, T. D.; Young, W. C.

doi:10.1109/tmag.1975.1058746

Cited by 34 publications

(13 citation statements)

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“…In designing, the relationship between compressive strength and elastic modulus should be used instead as a study has indicated that compressive strength and elastic modulus have a positive relationship [51,60]. Under this circumstance, the minimum compressive strength can be used to achieve the desired modulus of elasticity.…”

Section: Pavement Design Methodsmentioning

confidence: 99%

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The potential use of lightweight cellular concrete in pavement application: a review

Oyeyi

Tighe

2020

Int. J. Pavement Res. Technol.

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Protecting the pavement subgrade to increase the service life of road pavements is an aspect currently being explored. Several alternative pavement subbase materials are being considered, including Lightweight Cellular Concrete (LCC). Due to its lower weight, LCC incorporating industrial by-product, making it sustainable, and ease of use amongst other benefits, is seen as a potential candidate. This paper reports reviewing the potential application of LCC within the pavement structure with a specific application as a subbase. It examines the various properties such as modulus of elasticity, compressive and tensile strength, Water absorption, and freeze-thaw resistance necessary for pavement application. It also assesses its use in the field in Canada considering the design methods utilized. Some limitations and gaps for LCC application in pavements are also established and recommendations on how to further its use and performance. This review concludes that LCC possesses potential as a pavement subbase alternative; however, other mechanical properties like LCC’s fatigue life is essential. A comparative field study is also recommended to monitor actual performance and various factors on performance.

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Section: Pavement Design Methodsmentioning

confidence: 99%

“…Thermal insulation decreases with a decrease in density and improves with a decrease in temperature. A reduction of 26% in thermal conductivity was observed for densities between 640 and 1,440 kg/m 3 when temperatures were reduced from 22 to -196 o C [51].…”

Section: Functional Properties 251 Thermal Insulation/conductivitymentioning

confidence: 97%

The potential use of lightweight cellular concrete in pavement application: a review

Oyeyi

Tighe

2020

Int. J. Pavement Res. Technol.

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“…e water-to-cement ratio was fixed at 0.19 [34]. Ordinary Portland cement was blended with sulfoaluminate cement at a weight ratio of 9 : 1 [1,37]. A series of FC specimens with the same density of 1500 kg/m 3 [34] were prepared by adding graduated dosages (0.0%, 2.5%, 3.0%, 3.5%, 4.0%, and 4.5%) of EP into the mixed cement.…”

Section: Proportionsmentioning

confidence: 99%

“…Foam concrete (FC) is a composite of cement slurry containing aggregates and foam. Foam concrete is characterized with favorable fluidity, fire, and heat resistance and is lightweight, environmentally-friendly, and cost effective [1]. Foam concrete has been traditionally used in separating panels, filling, and cushioning materials.…”

Section: Introductionmentioning

confidence: 99%

Minimizing Drying Shrinkage and Enhancing Impermeability of Foam Concrete Modified with Epoxy Resin

Gong

2020

Advances in Civil Engineering

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Relatively high drying shrinkage and permeability were two of the major challenges associated with foam concrete (FC), primarily due to its high porosity nature. This study was aimed at reducing the drying shrinkage and improving the impermeability of FC by blending and modifying it with epoxy resin (EP). Extensive laboratory testing yielded an optimum content of 4.0% EP, corresponding to a minimum drying shrinkage rate of 1.47 mm/m, which was 48% lower than that of the unmodified FC. At this optimum dosage of 4.0% EP, the permeability pressure was at a maximum level of 1.4 MPa, whereas the permeability coefficient was at its lowest value of 0.75 × 10−9 mm/h. Internal pore structure and EP distribution were characterized using the scanning electron microscopy and indicated that a microgrid structure of the FC was formed internally, featuring an increase in the number of pores, a reduction in the average pore size, and a uniform pore size distribution. Similarly, surface energy measurements using the tensiometry method yielded maximum surface energy values at 4.0% EP content, which could be used to explain the reduced drying shrinkage and the enhanced impermeability characteristics of the modified FC.

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“…Notably, the foam concrete has been known as a kind of sustainable lightweight construction material with some advantages of the cost decrease, the optimization of insulation, and enhancing the fire resistance of structures [4]. Moreover, it also provides a quick and settlement-free building with good thermal insulation [5]. However, global warming due to the construction process, especially the cement production impulses the co-friendly substitute development for cement, and the research of new construction material applications is a priority.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Pre-foamed Ultra-lightweight Composites Incorporating Various Proportions of Slag

Huynh

Pham

et al. 2020

Period. Polytech. Civil Eng.

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This research examines the feasibility of using a mixture of cement, fly ash, ground granulated blast-furnace slag, and river sand to manufacture pre-foamed ultra-lightweight composite (PULC). Four PULC specimens were prepared with the substitution of cement by slag at 0, 10, 20, and 30 % by weight. The engineering properties of PULC samples were evaluated through the tests of compressive strength, dry density, water absorption, drying shrinkage, and thermal conductivity. Besides, numerical simulation of heat transfer through the PULC brick wall and the microstructure observation were performed. The performance of PULC mixtures incorporating slag showed higher effectiveness than merely used cement. The substitution of 20 % cement by slag resulted in the highest compressive strength as well as the lowest value of water absorption of the PULC samples. Also, the efficiency of the thermal conductivity was in inverse proportion with the density of PULC specimens and it was right for water absorption and drying shrinkage. Moreover, numerical simulations showed that the temperature distribution values in the wall made by PULC material were smaller than in the wall made by the normal clay brick in the same position. Besides, the microstructure analysis revealed that the existence of slag generated a more dense structure of PULC samples with the addition of calcium-silicate-hydrate (C-S-H) gel, especially for a mix containing 20 % slag. Thus, the results of this study further demonstrated that a 20 % slag was the optimal content for the good engineering properties of the PULC samples.

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Cellular concrete - A potential load-bearing insulation for cryogenic applications?

Cited by 34 publications

References 1 publication

The potential use of lightweight cellular concrete in pavement application: a review

The potential use of lightweight cellular concrete in pavement application: a review

Minimizing Drying Shrinkage and Enhancing Impermeability of Foam Concrete Modified with Epoxy Resin

Performance Evaluation of Pre-foamed Ultra-lightweight Composites Incorporating Various Proportions of Slag

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