Effect of Additives, Cement Type, and Foam Amount on the Properties of Foamed Concrete Developed with Civil Construction Waste

The main objective of this study was to evaluate the use of additives in producing foamed concrete blocks, which were made by totally replacing natural sand with civil construction waste (CCW). The concrete blocks were developed in accordance with an experimental design that used the complete factor...

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Bibliographic Details
Published in:Applied sciences 2019, Vol.9 (15), p.2998
Main Authors: Lermen, Richard Thomas, Favaretto, Patrícia, Silva, Rodrigo de Almeida, Hidalgo, Gelsa Edith Navarro, Tubino, Rejane M. C., Tiecher, Francieli
Format: Article
Language:English
Subjects:
Absorption
Acoustics
Additives
Aerated concrete
Aggregates
Cement
civil construction waste
Civil engineering
Compressive strength
Concrete
Concrete construction
Construction industry wastes
Construction materials
Curing
foamed concrete
Heat conductivity
Lightweight concretes
Mechanical properties
Permeability
properties
Recycled materials
Superplasticizers
Sustainability
Waste disposal
Water absorption
Water reuse
Water-cement ratio
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Summary:The main objective of this study was to evaluate the use of additives in producing foamed concrete blocks, which were made by totally replacing natural sand with civil construction waste (CCW). The concrete blocks were developed in accordance with an experimental design that used the complete factorial statistical method, for which three factors with different levels were considered: cement type (CP-V, CP II-Z, and CP II-F); use of additive (without additive, plasticizer, air entrainment, and superplasticizer) and foam amount (5.7%, 7.7%, and 9.5% of the total mass). The influence of each factor and the interactions between them were assessed on the following response variables: compressive strength, dry and saturated density, air voids, water absorption, and thermal conductivity. The results show that all factors had a significant influence on the variable response. For example, the use of the superplasticizer additive resulted in higher compressive strength, lower density, lower air void, and lower thermal conductivity. Finally, the use of additives had little influence on the response variables in relation to the other factors.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9152998