Influence of pumice on mechanical properties and durability of high performance concrete

Tran, Quang; Ghosh, Pratanu

doi:10.1016/j.conbuildmat.2020.118741

Cited by 32 publications

(20 citation statements)

References 16 publications

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“…Two approaches, chloride profiling according to the immersion test NT Build 443, and electrical resistivity measurement, are utilized. NT Build 443 lasts a relatively long time, requires intensive labor and is The coefficient of aging (see Table 2) was used to recalculate the diffusion coefficient obtained by NT Build 443 to the reference time of 28 days after casting via Equation (4). After that, the correlation coefficient was calculated as the ratio between the diffusion coefficient from the resistivity test measured in 28 days and from NT Build 443 test.…”

Section: Discussionmentioning

confidence: 99%

“…One should note that the diffusion coefficient of SLWAC measured by the procedure of NT Build 443 is about 60% higher (3.48 × 10 −11 m 2 s −1 in 168 days) in comparison to the diffusion coefficient obtained by resistivity measurements (1.39 × 10 −11 m 2 s −1 in 161 days), but in case of OPC, the results of the diffusion coefficient measured by the two methods are closer to each other: the difference is approximately 15% (see Figure 7). The coefficient of aging (see Table 2) was used to recalculate the diffusion coefficient obtained by NT Build 443 to the reference time of 28 days after casting via Equation (4). After that, the correlation coefficient was calculated as the ratio between the diffusion coefficient from the resistivity test measured in 28 days and from NT Build 443 test.…”

Section: Correlation Coefficientmentioning

confidence: 99%

“…Therefore, recycling and reusing waste or unsuitable building materials as a total or partial replacement of traditional concrete ingredients are of the highest interest. New concrete mixes present unique challenges, as standard procedures for measuring mechanical and durability parameters may not be appropriate and sufficient [3,4]. These properties are important not only in terms of classification among other concrete mixtures but also in terms of numerical analysis [5], which today offers enormous opportunities for improving the sustainability of a design because it is included in the preparation of structures and the analysis of existing structures.…”

Section: Introductionmentioning

confidence: 99%

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Durability Characteristics of Concrete Mixture Based on Red Ceramic Waste Aggregate

Horňáková

Lehner

et al. 2020

Sustainability

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The article aims to observe durability parameters of red ceramic waste aggregate concrete based on a measured chloride profile by the standardized NT Build 443 method, and to compare the results to the values measured by a test based on electrical resistivity measurements. The parameters related to the chloride ion diffusion are investigated on the new type of concrete designed in the previous project, which contains waste material–red ceramics fine aggregate, and artificial expanded clay coarse aggregate. Ceramic materials contribute to the highest percentage of the construction and demolition wastes and, in most cases, this type of waste is disposed of in landfills. Significant factors limiting the use of the studied material are the unavailability of standards, avoidance of risk, and lack of knowledge and experience in using ceramic wastes for construction purposes. The obtained results of the studied mixture are compared to a reference concrete in terms of mechanical properties and durability parameters. The calculated diffusion coefficient is a crucial input parameter for modeling of the degradation process and the prediction of concrete durability; therefore, proper identification is of interest in order to allow for a broader application of ceramic waste aggregate-based concrete. The research showed unproportionality of results measured by the two methods in the case of waste aggregate concrete (60% difference in comparison with reference concrete), therefore it was proved that the electrical resistivity measurements need correlation of the resulting diffusion coefficient for proper modeling.

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Section: Discussionmentioning

confidence: 99%

Section: Correlation Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Durability Characteristics of Concrete Mixture Based on Red Ceramic Waste Aggregate

Horňáková

Lehner

et al. 2020

Sustainability

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“…The porous structure of pumice is due to the formation of bubbles or air voids when gases contained in the molten lava flowing from volcanoes are entrapped on cooling [23]. About 40% of world pumice reserves are present in Turkey [24] which provides several opportunities for its efficient utilization in concrete generally as a lightweight aggregate [25][26][27][28] or as a cement replacement material [23,24,29,30].…”

Section: Introductionmentioning

confidence: 99%

Pumice as Precursor in Geopolymer Paste and Mortar

Kabay¹,

Mert²,

Miyan³

et al. 2021

J. Civ. Eng. Constr.

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Natural rocks of magmatic origin are alternative precursors in alkali-activated materials and provide opportunities in the search for more environmentally friendly binders compared to portland cement. The pumice is one of these rocks and its amorphous structure and chemical composition make it one of the candidates as a precursor in producing geopolymer binder when finely ground. Since the majority of the pumice reserves are located in Turkey increases its potential utilization in this area, even more. This paper evaluates the physical, mechanical, and microstructural properties of geopolymer pastes and mortars manufactured with pumice powder (PP) and ground granulated blast furnace slag (BFS) with the activating agents sodium hydroxide (NaOH), potassium hydroxide (KOH), and sodium silicate (SS) solution. The experimental results showed that the compressive strength of the geopolymer pastes was mainly affected by the activator concentration and the PP ratio, rather than the activator type, for single activator mixes. However, the incorporation of SS changed this trend as the KOH and SS combination resulted in higher compressive strength compared to the NaOH and SS. The gradual increase of the PP ratio in the mix design decreased the density and thermal conductivity, on the other hand, increased the water absorption values of the geopolymer mortars. However, the physical properties were insignificantly changed in geopolymer mortars incorporating 60, 70, and 80% of PP in the binder.

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“…Often, this concrete contains a bulky quantity of powder materials, which are necessary for maintaining adequate yield value, in addition to the viscosity of the fresh mixture, and thereby decreasing segregation, bleeding, and settlement. Using fine materials of industrial waste, such as silica fume, western parts of the United States [12] are found abundant amounts of VA classified as a natural pozzolanic material, whose physical and chemical characteristics showed that there is great potential for using it as a supplementary, cementitious material.…”

Section: Introductionmentioning

confidence: 99%

The effect of varied types of steel fibers on the performance of self-compacting concrete modified with volcanic pumice powder

Magbool

Zeyad

2021

Materials Science-Poland

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The aim of this work involves studying the impact of varied types of steel fibers (SF) on the performance of self-compacting concrete (SCC), containing volcanic pumice powder (VPP). In this study, five types of steel fiber, which had a hooked end with two lengths of (SF1) and (SF3), flat end of length (SF2), in addition to the pointed end of (SF4) and (SF5) by 1% of volume fraction, were used. In addition, hybrid steel fiber (a mixture of all the steel fiber types) by 0.2% of volume fraction of concrete volume was used. Moreover, VPP was utilized by 30% cement mass as a substitute material for producing SCC. The impact of steel fiber properties in the shape of SF on the fresh concrete properties as slump flow and segregation were investigated. In addition to their influence on the compressive strength, split tensile strength, flexural strength, toughness, porosity, water absorption, and bulk density were examined. The results showed that SF led to decreasing the SCC fresh properties. Utilizing SF, on the other hand, improved the SCC hardened properties, as well as the toughness indices.

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Influence of pumice on mechanical properties and durability of high performance concrete

Cited by 32 publications

References 16 publications

Durability Characteristics of Concrete Mixture Based on Red Ceramic Waste Aggregate

Durability Characteristics of Concrete Mixture Based on Red Ceramic Waste Aggregate

Pumice as Precursor in Geopolymer Paste and Mortar

The effect of varied types of steel fibers on the performance of self-compacting concrete modified with volcanic pumice powder

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