Andreasen Particle Packing Method on the Development of Geopolymer Concrete for Civil Engineering

Borges, Paulo Henrique Ribeiro; Fonseca, Lucas Furtado da; Nunes, Vitor A.; Panzera, Túlio Hallak; Martuscelli, Carolina Coelho

doi:10.1061/(asce)mt.1943-5533.0000838

Cited by 37 publications

(19 citation statements)

References 14 publications

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“…The particle size distribution of the dry mix (binder + aggregates) used in this study (hereafter referred to as Geopolymer PSD curve) has been used in a previous article (Borges et al, 2014); it will also be used in this study for all geopolymer formulations containing either quartz aggregate or jig and spiral waste. In other words, the aggregates will not be used as collected, but rather sieved and mixed in fixed proportions to build the PSD curve (Sieves (% retained): 4.8 (15.3%); 2.4 (12.77%); 1.2 (10.85%); 0.6 (9.22%); 0.3 (7.83%); 0.15 (6.66%) and <0.075 (37.63%)).…”

Section: Experimental Factors Levels and Responses (Properties)mentioning

confidence: 99%

“…The solution to binder ratio (s/b) of geopolymers is determined according to the fineness of the precursor. Borges et al (2014) studied the activation of the same MK and found that geopolymers with good workability were produced with s/b ratio ranging from 1.2 to 1.5. However, the choice of the s/b ratio is also a function of the density of the aggregates employed.…”

Section: Experimental Factors Levels and Responses (Properties)mentioning

confidence: 99%

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Reuse of iron ore tailings in the production of geopolymer mortars

et al. 2019

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A great variety of silica and alumina-rich materials have been investigated in the production of alkaline activated binders (or geopolymers) with low environment impact, e.g. low CO 2 emissions. Geopolymer mortars and concretes may be more environmentally friendly if not only Portland cement but also natural aggregates (sand, gravel) are replaced with waste materials. This article presents results of geopolymers made with tailings from the iron mining industry. The geopolymer matrices are composed of metakaolin (MK) activated with a sodium silicate + sodium hydroxide solution. Two different iron ore tailings replaced a natural quartz aggregate in the geopolymers' formulation. The hardened properties assessed were compressive strength, water absorption, apparent density and porosity. Scanning electron microscopy (SEM) and x-ray micro computed tomography (μ-CT) were used to assess the changes in the microstructure when the tailings were incorporated into the geopolymers. Results show that the employment of iron ore tailings is not detrimental to the mechanical strength of geopolymers; however, geopolymers containing those alternative aggregates may present higher water absorption and porosity, and durability studies are required.

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Section: Experimental Factors Levels and Responses (Properties)mentioning

confidence: 99%

Section: Experimental Factors Levels and Responses (Properties)mentioning

confidence: 99%

Reuse of iron ore tailings in the production of geopolymer mortars

et al. 2019

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“…The densest packing theory is considered as one of the basic principles for the production of RPC. It is commonly accepted that an optimal packing of granular ingredients is of crucial importance for achieving excellent mechanical strength and durability of cement-based materials (Borges et al 2014;Brouwers and Radix 2005;de Larrard and Sedran 1994;Féret 1892;Fuller and Thompson 1907;Hüsken and Brouwers 2008;Ng and Foster 2013;Peng 2009;Su et al 2001). This can be achieved by optimizing the particle size distribution, and thus obtaining a much denser particle-packing of concrete ingredients (de Larrard 1989;Féret 1892;Van-Tuan et al 2011;Wu and Lian 1999;Yu et al 2014Yu et al , 2015.…”

Section: Introductionmentioning

confidence: 99%

Optimization for Mix Proportion of Reactive Powder Concrete Containing Phosphorous Slag by Using Packing Model

Peng

Liu

et al. 2020

ACT

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A mix-design method based on packing model was used to optimize the mix proportion of Reactive Powder Concrete (RPC) containing phosphorous slag in this paper. The design aimed to achieve a densely compacted matrix by applying the modified Andreasen particle packing model, i.e., the Dinger-Funk particle size distribution (PSD) equation. MAT-LAB and Excel Solver Tool were utilized to implement the calculation of the design with four steps. The outcome of the design was quite similar to another two results obtained respectively through the method for minimum water demand of paste and through the orthogonal design for mix proportion of RPC. According to these three mix proportions, RPC specimens with volume fraction of steel fiber of 1% were produced after they had been cured in 95°C steam for 72 hours. Their compressive and flexural strength are more than 180 MPa and 28 MPa, respectively. Microstructural investigation of specimens through mercury intrusion porosimetry and scanning electron microscopy confirms the very low porosity and quite compact microstructure of the RPC.

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“…The choice of the aggregate is important, since it has an impact in cost and workability of the fresh concrete, and may also influence mechanical strength, dimensional stability, and durability of the hardened concrete. The granulometric distribution affects directly the workability of the concrete, seeing that it is directly linked to particle packing [1,3]. In addition, the roundness of the particles must also be considered, i.e.…”

Section: Introductionmentioning

confidence: 99%

New mathematical modelling for grain size distribution adjustment in concrete

et al. 2019

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Concrete used in civil engineering is a composite obtained from the combination of coarse and fine aggregates, cement and water, and its cost and quality are normally associated to the proportion of its constituents (ceramic formulation), as well as the reduction of water consumption. The aggregates used in concrete may have diverse origins, and the syenite extracted at Pedra Branca Alkaline Massif is one of the materials that can be used for this substitution. In order to do so, a reference formulation of concrete was calculated and optimized using the mathematical models of Andreasen, and syenite was added substituting 25, 50, 75 and 100% of the fine aggregate. In order to maintain the original granulometric distribution, an algorithm was developed to compensate the different particle size distributions. The grain size correction guaranteed the maintenance of the original properties of the concrete, reaching values of mechanical strength above 35 MPa.

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Andreasen Particle Packing Method on the Development of Geopolymer Concrete for Civil Engineering

Cited by 37 publications

References 14 publications

Reuse of iron ore tailings in the production of geopolymer mortars

Reuse of iron ore tailings in the production of geopolymer mortars

Optimization for Mix Proportion of Reactive Powder Concrete Containing Phosphorous Slag by Using Packing Model

New mathematical modelling for grain size distribution adjustment in concrete

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