Development of Green Cementitious Materials by Using the Abrasive Waterjet Garnet Wastes: Preliminary Studies

Baeră, Cornelia; Vasile, Vasilica; Matei, Claudiu Lucian; Gruin, Aurelian; Szilagyi, Henriette; Perianu, Ion Aurel

doi:10.4028/www.scientific.net/amr.1164.87

Cited by 7 publications

(7 citation statements)

References 11 publications

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“…AWJ material processing represents a relatively new and extremely efficient method in the specific industries, implying various applicability areas, attributed to different materials, with different properties and domains of use, Figure 2. The material processing, besides cutting includes drilling, milling, sandblasting and cleaning as well, as the versatility of the technique and the associated research for continuous improvement determines its large applicability in many complementary or distinct fields [13][14][15][16]. The use of waterjets is not new: the Egyptians used it also combined with sand for mining and cleaning purposes; when the technology allowed the increase of water pressure, the technique was adapted for forestry activities, as well.…”

Section: Abrasive Waterjet (Awj) Methods For Materials Industrial Pro...mentioning

confidence: 99%

Research on valorisation of spent garnets as addition in cementitious materials – preliminary experimental evaluation

Baeră

Chendes

Gruin

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Abrasive waterjet (AWJ) material processing represents a relatively new and extremely efficient method in the specific industries, implying various applicability areas, attributed to different materials, with different properties and domains of use. Besides numerous advantages of the AWJ cutting and generally of the material processing techniques, they also involve the waste generation: the abrasive sands are converted into sludge material, collected into recipients and further on, after natural drying, they become waste dumps randomly deserted. The enlargement of the AWJ techniques in the latest years determines the corresponding increase of the associated Garnet wastes (Spent Garnets, SG), thus leading towards the clear need of identifying opportunities for their recycling and valorisation. Aggregates are basic raw materials in the production of concrete, mortar and plasters, composite cementitious and/or cement-free materials (geopolymer concrete) in the building materials and generally, in the construction industry. The rapid growth of the population, recorded mainly in urban areas, determines an increasing demand on housing facilities and consequently, on concrete production and aggregates consumption. Aggregates and sand, mainly exploited from riverbeds or quarries, represent exhaustible natural resource for which substitution solutions need to be found, in order to control and reduce their extraction from the natural landscape. Considering the superposition of this independent cause and effect situations, the rapid growth of Spent Garnets (SG) landfills, generated by AWJ processes, and, on the other hand, the need to substitute the natural aggregate in construction industry, a reliable solution could emerge from the potential valorisation of SG wastes as partial or even complete substitution of sands / aggregates in the composition of construction materials. The present paper offers a preliminary overview regarding the possibility of incorporating SG wastes of local production in usual cement-based materials, as partial substitute of the aggregate, for the double purpose of waste management implementation and natural resources protection, on the transition path towards the implementing the Circular Economy (CE) concept in the Romanian industry.

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Section: Abrasive Waterjet (Awj) Methods For Materials Industrial Pro...mentioning

confidence: 99%

Research on valorisation of spent garnets as addition in cementitious materials – preliminary experimental evaluation

Baeră

Chendes

Gruin

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Considering their ability to generate steady abrasive flows, with no blockages occurring in the focusing tubes, Garnets can be successfully used to gain edge cutting accuracy as complementary waterjet cutting operations for diverse materials stone, granite and marble cutting, metalworking (Carbon and Stainless Steel, Aluminum, Copper), ceramic and glass, FRP and Carbon fibre, plastic and timber cutting etc.) [9,17,18]. According to last decade data, worldwide, there are four dominant Garnet producing countries: India (700 000 metric tonnes), China (470 000 metric tonnes), Australia (150 000 metric tonnes), and the United States (54 000 metric tonnes) [16,19].…”

Section: Abrasive Garnet Sands For Industrial Application and The Der...mentioning

confidence: 99%

“…Recently, the studies performed in the topic of valorising Garnet-type wastes in mortars and concrete increased, proving the growing interest of academia and also the industry, on both directions: the alkali activated materials and also the cement-based ones. The initial studies available till 2019 were quite scarce and offered a preliminary preview regarding the potential of Garnet wastes as a partial substitute of the aggregate (fillers) in concrete [9]. Recent studies confirmed this potential and validated some of initially launched assumptions, offering complementary information and guiding lines for further investigation.…”

Section: Introductionmentioning

confidence: 98%

Valorization of Abrasive Waterjet Garnet Wastes by Innovative Integration in Building Materials

Baeră

Szilagyi

Gruin

et al. 2022

SSP

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The current study focusses on possibilities of valorizing the spent Garnets produced by waterjet cutting operations, by integrating it in construction materials, as raw material substitution. The waterjet material processing by the use of abrasive Garnets is also in continuous expansion, due to its versatility and quality performance, this also generating large quantities of waste: the initial waterjet sludge collected in recipients during the process of material processes, dries and gradually turns into waste dumps, usually randomly deserted, especially in countries lacking specific legislation ad applicability methods. Therefore, converting the spent Garnets into filler replacement into concrete mixes could represent a huge benefit for both industries: constructions, lacking fillers, as sand replacement in concrete mix, possibly improving the material durability as well, and also material processing industry, by solving the waste generation problem. The initial, preliminary results, favorable to the use of spent Garnets in concrete and mortars, are confirmed by supplementary, international research, determining local interest for such valorization of the Garnet waste. This paper presents the latest research achievements in this topic and also, the derived possibilities regarding multidisciplinary studies which could determine the applicability of the waste in the construction industry, in Romania.

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“…Such an analysis helps civil engineers in optimizing the process of structural intervention by deepening the understanding of how the building works from the structural point of view and also considering the concrete mix design and the associated physical, mechanical, and durability characteristics. Therefore, the interventions can be targeted on those elements that have a deficient behavior, which can induce negative effects into the structure [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The viability of the method should also be verified on various types of concrete mix design developed with different additions, waste, or by-products (mineral, rubber, plastic, glass, etc. ), which gained large diversity in recent years due to www.videleaf.com environmental protection requirements and Circular Economy implementation [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity

Bolborea¹,

Baeră²,

Dan³

et al. 2021

Statistical Inference for Ergodic Algorithmic Model (EAM), Applied to Hydrophobic Hydration Processes

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Developing non-destructive methods (NDT) that can deliver faster and more accurate results is an objective pursued by many researchers. The purpose of this paper is to present a new approach in predicting the concrete compressive strength through means of ultrasonic testing for non-destructive determination of the dynamic and static modulus of elasticity. For this study, the dynamic Poisson's coefficient was assigned values provided by technical literature. Using ultra-sonic pulse velocity (UPV) the apparent density and the dynamic modulus of elasticity were determined. The viability of the theoretical approach proposed by Salman, used for the air-dry density determination (predicted density), was experimentally confirmed (measured density). The calculated accuracy of the Salman method ranged between 98 and 99% for all the four groups of specimens used in the study. Furthermore, the static modulus of elasticity was deducted through a linear relationship between the two moduli of elasticity. Finally, the concrete compressive strength was mathematically determined by using the previously mentioned parameters. The accuracy of the proposed method for concrete compressive strength assessment ranged between 92 and 94%. The precision was established with respect to the destructive testing of concrete cores. For this research, the experimental part was performed on concrete cores extracted from different elements of different structures and divided into four distinct groups. The high rate of accuracy in predicting the concrete compressive strength, provided by this study, exceeds 90% with respect to the reference, and makes this method suitable for further investigations related to both the optimization of the procedure and = the domain of applicability (in terms of structural aspects and concrete mix design, environmental conditions, etc.).

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Development of Green Cementitious Materials by Using the Abrasive Waterjet Garnet Wastes: Preliminary Studies

Cited by 7 publications

References 11 publications

Research on valorisation of spent garnets as addition in cementitious materials – preliminary experimental evaluation

Research on valorisation of spent garnets as addition in cementitious materials – preliminary experimental evaluation

Valorization of Abrasive Waterjet Garnet Wastes by Innovative Integration in Building Materials

Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity

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