Reuse of 3D Additive Manufacturing Concrete Scrap in Construction

Lesovik, Valery; Tolypina, N. M.; Glagolev, E.S.; Tolypin, D.A.

doi:10.1007/978-3-030-72910-3_1

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Бетонный лом изделий и конструкций 3D-аддитивного производства представляет собой мелкозернистый бетон, твердевший в воздушных условиях, что обусловливает наличие в цементной матрице значительного количества негидратированных клинкерных частиц, способных после измельчения гидратироваться с образованием новой структуры твердения. После кратковременного помола в вибрационной мельнице бетонный лом содержит частично очищенный и измельченный кварцевый песок, тонкодисперсную цементную матрицу с примесью пылевидного кварца и клинкера [1][2]. Полифракционный гранулометрический состав многокомпонентной смеси способствует образованию полидисперсной структуры, в которой более мелкие частицы располагаются в пустотах крупных частиц, при этом обеспечивается минимизация пустотности пылевидной фракции, что положительно влияет на прочность образцов мелкозернистого бетона [3][4][5][6][7].…”

Section: влияние полидисперсного бетонного лома 3d-печати на структурообразование бетонаunclassified

The Effect of Polydisperse Concrete Scrap of 3d Printing on the Structure Formation of Concrete

Tolypina

Tolypin

2021

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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The article considers the influence of polydisperse concrete scrap of 3D printing on the structure formation of concrete during its repeated application. It is established that the favorable effect on the strength is due to the presence of thin layers on the surface of the secondary fine aggregate in the form of hydrate phases that enhance adhesion to the forming cement matrix. At the same time, an important multifunctional role is played by a fine fraction consisting of a cement matrix with a small amount of pulverized clinker and quartz. It increases the volume of the binder part; performs the function of the centers of crystallization of hydrate phases; promotes the formation of a compact and homogeneous structure by filling the pores; increases the strength due to the hydration of the minerals alite and belite. It is shown that the minimization of the voidness of the fine-grained part of the concrete scrap is largely due to the polymodal grain composition, which contributes to the optimization of the structure of fine-grained concrete and increases the strength. The features of the microstructure of fine-grained concrete samples are established. Artificial conglomerate based on concrete scrap is characterized by a compact structure, due to the high adhesion of the fine aggregate to the cement matrix of concrete, filling the pores with hydrate phases and fine particles, in contrast to the samples of fine-grained concrete of the control composition, which structure is characterized by a weak contact zone between the aggregate and the cement matrix.

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Section: влияние полидисперсного бетонного лома 3d-печати на структурообразование бетонаunclassified

The Effect of Polydisperse Concrete Scrap of 3d Printing on the Structure Formation of Concrete

Tolypina

Tolypin

2021

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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An Effective Way to Recycle 3d Printing Concrete Scrap

Tolypin

Tolypina

2021

Construction Materials and Products

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the article proposes a rational method for processing 3D printing concrete scrap using vibration equipment, which allows obtaining a multicomponent building material with minimal electricity consumption. As a crite-rion for the degree of grinding of concrete scrap, it is proposed to use the specific surface area of the finely dispersed part of concrete scrap, which should correspond to 400-500 m2/kg. The possibility of reusing the resulting product instead of the traditional fine aggregate of quartz sand is shown. It was found that the con-crete scrap without the addition of Portland cement hardens, reaching up to 48% of the compressive strength of the control samples by 28 days. When 10% of the binder CEM I 42.5 N was added to the concrete scrap processing product, the compressive strength of fine-grained concrete increased by 106.6%, and 20% of Portland cement - by 112.2 %, compared to the strength of control samples of a similar composition on tra-ditional quartz sand after 28 days of hardening. It is noted that this is primarily due to the weak contact zone of quartz sand and the cement matrix of concrete. The use of the product of processing concrete scrap al-lows obtaining building composites based on it with the complete exclusion of natural raw materials

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Reuse of 3D Additive Manufacturing Concrete Scrap in Construction

Cited by 2 publications

References 5 publications

The Effect of Polydisperse Concrete Scrap of 3d Printing on the Structure Formation of Concrete

The Effect of Polydisperse Concrete Scrap of 3d Printing on the Structure Formation of Concrete

An Effective Way to Recycle 3d Printing Concrete Scrap

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