Cellular concrete review: New trends for application in construction

Chica, Lina; Alzate, Albert

doi:10.1016/j.conbuildmat.2018.12.136

Cited by 186 publications

(55 citation statements)

References 62 publications

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“…Limited experimental results were found related to lightweight concrete resistance against accelerated carbonation [31,32] and freeze-and-thaw cycles [33]. Amran et al [13] indicated that foamed concrete exhibited high resistance to accelerated carbonation.…”

Section: Introductionmentioning

confidence: 99%

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Production of Lightweight Alkali Activated Mortars Using Mineral Wools

et al. 2019

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This experimental study aimed to develop a fiber-reinforced lightweight mineral wool-based alkali activated mortar. The lightweight mineral wool-based alkali activated mortars were produced using premade foam and reinforced by polypropylene (PP) fibers. They were assessed in terms of fresh and hardened-state properties. Fresh-state properties were investigated by mini-slump tests. Hardened-state characteristics were assessed by ultrasonic pulse velocity, dry density, compressive and flexural strengths, drying shrinkage, efflorescence, water absorption, and permeable porosity. For the first time, the resistance of the synthesized lightweight mineral wool-based alkali activated mortars against harsh conditions (carbonation, freeze and thaw, and high temperature) were evaluated. The porous structures of the developed lightweight alkali activated mortars were also analyzed using an X-ray micro-computed tomography (CT) technique. Lightweight mix compositions with densities in a range of 770–1510 kg/m3, compressive strengths of 1–9 MPa, and flexural strengths of 2.6–8 MPa were developed. Increases in both density and strength after carbonation were also recorded, while a decrease of strength was noticed after exposure to freeze/thaw and high temperatures of up to 500 °C.

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Section: Introductionmentioning

confidence: 99%

“…For instance, the closed pore structure leads to lower permeable porosity and water absorption and therefore lower damage due to the increased volume of frozen water at freeze/thaw conditions. Positive effects of the closed pore structure on increasing freeze and thaw resistance were detected in [33].…”

Section: Introductionmentioning

confidence: 99%

Production of Lightweight Alkali Activated Mortars Using Mineral Wools

et al. 2019

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“…Essas bolhas devem permanecer intactas durante todo o processo de produção. Segundo Chica et al (2019), essa inserção do agente espumígeno determina algumas características do material, como baixo peso, baixa condutividade térmica, alta resistência ao fogo, baixa resistência à compressão. Raj et al (2019), recentemente, apresentaram uma revisão sobre as características dos concretos espumígenos, na qual constaram que a estabilidade da espuma é um aspecto significativo que afeta amplamente a resistência mecânica do concreto espumígeno.…”

Section: Figura 1 -Materiais Para Confecção Do Concreto Espumígenounclassified

Utilização do Resíduo de Areia Verde de Fundição no Desenvolvimento de Concreto Espumígeno

Lermen

Bonatto

Silva

2020

arqimed

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O principal objetivo deste trabalho foi avaliar a substituição da areia natural pelo resíduo de areia verde de fundição na fabricação de concreto espumígeno. O projeto experimental foi constituído de dois fatores com diferentes níveis: proporção de resíduo de areia verde de fundição em cinco níveis (0%, 25%, 50%, 75%, 100%) e quantidade de espuma em quatro níveis (5%, 10%, 15%, 20% em relação à massa total). A substituição da areia natural foi feita em relação a massa de material. As influências de cada fator sobre a resistência à compressão, densidade (seca e saturada), índice de vazios e absorção de água foram avaliadas. A partir dos resultados, pode-se observar que todos os fatores tiveram influência significativa sobre as variáveis respostas, isto é, aumentando a quantidade de espuma, a resistência à compressão, a densidade seca e a densidade saturada diminuíram em média 32,9%, 21,0% e 14,5%, respectivamente. Já o índice de vazios e a absorção de água tiveram um aumento, em média, de 44,1% e 76,9%, respectivamente, com o aumento da quantidade de espuma. Também se observou que aumentando o percentual de substituição do resíduo em relação a quantidade de areia natural a densidade seca aumentou, em média 23,7% e a densidade saturada aumentou, em média, 14,1%. A resistência à compressão, o índice de vazios e a absorção de água diminuíram, 29,1%, 31,0% e 43,5%, respectivamente, com o aumento do percentual de substituição. De acordo com os resultados é possível verificar que o resíduo de areia verde de fundição tem potencial para ser utilizado na fabricação de blocos de concreto espumígenos, porém estudos avaliando a durabilidade e os efeitos ambientais devem ser realizados, assim como em estudos anteriores que utilizam esse resíduo em concreto e argamassas convencionais e também em pavimentos.

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“…The density of foamed concrete ranges from 300 to 1800 kg/m3, which is foamed concrete has the main advantage as roof material because of its low density and low thermal conductivity. The thermal conductivity of foamed concrete ranges of 0.1 -0.7 W/m.K for a dry density of 600-1600 kg/m3, decreasing according to its density [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of precast foam concrete integrated with green roofs system

Munir¹,

Abdullah²,

Afifuddin³

et al. 2020

Proceedings of the EduARCHsia &Amp; Senvar 2019 International Conference (EduARCHsia 2019)

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The increase in urban temperature because of the urban heat island phenomenon affected energy usage for the building sector. Most of the energy usage in the building is for the air conditioning system to achieve thermal comfort. It is necessary to reduce the cooling load by minimizing heat gain to the building so that the air conditioning system uses less energy consumption. Passive design with a green roof system offers a solution to reduce heat gain from solar radiation through the roof. However, only a few buildings have implemented a green roof system in the tropics, especially in Indonesia, and the literature found on this subject is also inadequate. This research studies the thermal performance of precast lightweight foamed concrete as a roof structure integrated with a green roof system through experimental modeling. We constructed two prototype rooms with the precast foam concrete panel as the roof. One prototype uses a green roof and the other without a green roof. We expose the prototypes to an open environment with direct sunlight for 3 days. The air and surface temperatures inside and outside the models were measured continually at the 10-second intervals. The thermal performance of the green roof is evaluated by comparing the thermal responses of the models during the exposure. The results show that the green roofs significantly reduce the heat load from solar radiation during the day.

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Cellular concrete review: New trends for application in construction

Cited by 186 publications

References 62 publications

Production of Lightweight Alkali Activated Mortars Using Mineral Wools

Production of Lightweight Alkali Activated Mortars Using Mineral Wools

Utilização do Resíduo de Areia Verde de Fundição no Desenvolvimento de Concreto Espumígeno

Thermal performance of precast foam concrete integrated with green roofs system

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