2019
DOI: 10.3390/app9152998
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Effect of Additives, Cement Type, and Foam Amount on the Properties of Foamed Concrete Developed with Civil Construction Waste

Abstract: 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)… Show more

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Cited by 7 publications
(4 citation statements)
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“…Figure 2 shows the experimental apparatus used to determine thermal conductivity, which was done by using a hot thermal wire on the surface. This technique has already been corroborated as a variant of the parallel hot wire by several authors (GRAZZINI;BALOCCO, 1995;AKIYOSHI et al, 2001;SANTOS, 2002;FRANCO, 2007;SACHT et al, 2010;LERMEN et al, 2019) and is characterized as being a direct method that detects the transient temperature. The experimental system consists of two multimeters to determine the electric current and voltage; two samples in the form of a parallelepiped; a hot wire (0.5 mm diameter kanthal) connected to a power source; four temperature sensors (NTC); and a data acquisition system.…”
Section: Characterization Of the Blocksmentioning
confidence: 88%
“…Figure 2 shows the experimental apparatus used to determine thermal conductivity, which was done by using a hot thermal wire on the surface. This technique has already been corroborated as a variant of the parallel hot wire by several authors (GRAZZINI;BALOCCO, 1995;AKIYOSHI et al, 2001;SANTOS, 2002;FRANCO, 2007;SACHT et al, 2010;LERMEN et al, 2019) and is characterized as being a direct method that detects the transient temperature. The experimental system consists of two multimeters to determine the electric current and voltage; two samples in the form of a parallelepiped; a hot wire (0.5 mm diameter kanthal) connected to a power source; four temperature sensors (NTC); and a data acquisition system.…”
Section: Characterization Of the Blocksmentioning
confidence: 88%
“…Como se esperava, as densidades diminuíram com o aumento da quantidade de espuma, pois aumentando a quantidade de espuma, aumenta a inserção de bolhas de ar no interior do concreto e consequentemente aumenta a quantidade de poros. Isso está de acordo com os estudos de Favaretto, et al (2017) e Lermen, et al (2019). Em relação ao percentual de substituição, pode ser visto que aumentando a susbtituição da areia natural pelo RAVF as densidades (seca e saturada) aumentam.…”
Section: Densidades Seca E Saturadaunclassified
“…A Figura 8(a) mostra o gráfico de absorção de água em relação a quantidade de espuma visualizado, onde é possível visualizar que o aumento da quantidade de espuma adicionada aumenta a absorção de água. Segundo Gomes et al (2015) e Lermen et al (2019), esse fenômeno ocorre devido ao aumento da quantidade de vazios total e do aumento da conectividade entre os poros.…”
Section: Absorção De áGuaunclassified
“…It has also been proven that casein does not significantly reduce the vapor permeability of clay plaster [22]. In the technology of building materials, proteins are used for aerating and foaming concrete [23,24]. When casein is dissolved, air bubbles form as the mixture is mixed.…”
Section: Introductionmentioning
confidence: 99%