Alkali activated lightweight mortars for passive fire protection: A preliminary study

Carabba, Lorenza; Moricone, Raffaela; Scarponi, Giordano Emrys; Tugnoli, Alessandro; Bignozzi, Maria Chiara

doi:10.1016/j.conbuildmat.2018.11.005

Cited by 54 publications

(13 citation statements)

References 41 publications

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“…The waste density, 3.02 g/cm³, is within the range of 2.1 and 3.3 g/cm³, which is considered suitable for refractory materials (SMITH; HASHEMI, 2010). The density is related to the thermal conductivity, since the higher the density, the greater the thermal conductivity (CARABBA et al, 2019). The waste refractory also showed low loss on ignition, which leads us to believe that it has considerable thermal stability and little presence of organic matter.…”

Section: Resultsmentioning

confidence: 99%

Resíduos refratários para argamassa para proteção passive contra incêndio

et al. 2020

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Resumo A proteção passiva contra incêndio (PPCI) é um campo de estudo aplicado à indústria da construção civil. Os resíduos de tijolos refratários contêm elementos que podem contribuir para as propriedades necessárias à PPCI. Diante disso, o trabalho desenvolveu uma argamassa com resíduos de tijolos refratários para utilização como PPCI. As 4 formulações propostas tiveram a resistência à compressão e flexão, densidade e porosidade aparente, condutividade térmica e variação linear avaliadas antes e após tratamento térmico a 600 °C e a 1100 °C. A densidade não apresentou significativas diferenças entre as formulações. A porosidade aumentou após o tratamento térmico. A mistura que apresentou maior contração a 1100 °C foi aquela com maior teor de gesso e todas as demais apresentaram valores de contração menores que o máximo permitido pela C195. A proporção que utilizou maior quantidade de gesso foi o que obteve a menor condutividade térmica. Portanto, conclui-se que a utilização do resíduo refratário é viável para PPCI, uma vez que atendem aos requisitos normativos.

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Section: Resultsmentioning

confidence: 99%

Resíduos refratários para argamassa para proteção passive contra incêndio

et al. 2020

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“…Due to the absence of organic particles, it has been applied in products with an improved fire resistance [112][113][114][115][116]. The current state of the art indicates the development of heat-resistance geopolymers [112,[117][118][119][120], binder formulas, and concrete mixes, which are suitable and applicable in the production of fire-proof rainscreens [121], small masonry elements [122], spray-applied fire-resistive material (SFRM) [122], and intumescent coatings [123,124]. A mix of metakaolin and GGBS filler applied in 10 mm thick geopolymer panels showed a great performance against a 1100 • C flame [125].…”

Section: Fire Resistance Of Concretes Based On Alkali-activated Binde...mentioning

confidence: 99%

Eco-Concrete in High Temperatures

Sundin¹,

Hedlund²,

Ćwirzeń³

2023

Materials

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Concrete technology is becoming more and more sustainable and ecological following more extensive and focused research. The usage of industrial waste and by-products, such as steel ground granulated blast-furnace slag (GGBFS), mine tailing, fly ash, and recycled fibers, is a very important step toward a good transition of concrete into a “green” future and significant improvement in waste management in the world. However, there are also several known durability-related problems with some types of eco-concretes, including exposure to fire. The general mechanism occurring in fire and high-temperature scenarios is broadly known. There are many variables that weightily influence the performance of this material. This literature review has gathered information and results regarding more sustainable and fire-resistant binders, fire-resistant aggregates, and testing methods. Mixes that utilize industrial waste as a total or partial cement replacement have been consistently achieving favorable and frequently superior outcomes when compared to conventional ordinary Portland cement (OPC)-based mixes, especially at a temperature exposure up to 400 °C. However, the primary emphasis is placed on examining the impact of the matrix components, with less attention given to other factors such as sample treatment during and following exposure to high temperatures. Furthermore, there is a shortage of established standards that could be utilized in small-scale testing.

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“…In addition, the room temperature curing generates a product less prone to cracking than heat curing when exposed to high temperature [38]. Considering the good performance of AAM as fire resistant materials [165][166][167], research has also focused on the use of lightweight AAM for steel protection (passive fire protection systems) [168][169][170]. Heat-induced cracking in fly ash-based alkali-activated pastes and lightweight mortars was analyzed by in situ acoustic emission detection during complete heating-cooling cycles [171].…”

Section: Durability Of Special Mixtures 81 Fly Ash-based Geopolymersmentioning

confidence: 99%

The Improvement of Durability of Reinforced Concretes for Sustainable Structures: A Review on Different Approaches

et al. 2022

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The topic of sustainability of reinforced concrete structures is strictly related with their durability in aggressive environments. In particular, at equal environmental impact, the higher the durability of construction materials, the higher the sustainability. The present review deals with the possible strategies aimed at producing sustainable and durable reinforced concrete structures in different environments. It focuses on the design methodologies as well as the use of unconventional corrosion-resistant reinforcements, alternative binders to Portland cement, and innovative or traditional solutions for reinforced concrete protection and prevention against rebars corrosion such as corrosion inhibitors, coatings, self-healing techniques, and waterproofing aggregates. Analysis of the scientific literature highlights that there is no preferential way for the production of “green” concrete but that the sustainability of the building materials can only be achieved by implementing simultaneous multiple strategies aimed at reducing environmental impact and improving both durability and performances.

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Alkali activated lightweight mortars for passive fire protection: A preliminary study

Cited by 54 publications

References 41 publications

Resíduos refratários para argamassa para proteção passive contra incêndio

Resíduos refratários para argamassa para proteção passive contra incêndio

Eco-Concrete in High Temperatures

The Improvement of Durability of Reinforced Concretes for Sustainable Structures: A Review on Different Approaches

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