Composite binders with superabsorbent polymers

Composite binders with superabsorbent polymers

Автор: Lesovik V.S., Popov D.Yu., Fediuk R.S., Usanova K.Iu.

Журнал: Строительство уникальных зданий и сооружений @unistroy

Статья в выпуске: 3 (107), 2023 года.

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The object of research is a composite binder with superabsorbent polymers. The work aims to research the combined action of composite binders and superabsorbent polymers. Methods. The particle sizes distribution of the composite binder was studied by laser granulometry. The fresh properties of the mix were determined by examining the slump flow. The average density was calculated by dividing the mass of the sample by its volume. The compressive strength was studied under a static load on the press on samples with a rib of 70 mm at 3, 7, and 28 days of age. Results. Obtaining polymineral composite binders was carried out by joint grinding of Portland cement CEM I 42.5 N and wet magnetic separation (WMS) waste to a specific surface area of ≈ 550 m2/kg in a vibration mill, followed by the introduction of pre-ground Opoka-like marl (Ssp ≈ 700 m2/kg) used as a mineral modifier. Joint grinding of cement and WMS waste in different percentages and introducing the optimal amount of a mineral modifier made it possible to identify the effect of the composition on the compressive strength. When tested on the 28th day of hardening of the compositions CB-3 and CB-2, an increase in the compressive strength by 82.2 and 60.3%, respectively, was found, while in the composition of CB-1, there was a decrease in the compressive strength by 14.5%. As a result of joint grinding to an equal specific surface, despite the different ratios of components and their hardness, an almost equal grain composition of polymineral composite binders was achieved. Taking into account the increase in the strength of the developed compositions of polymineral composite binders, optimized by the chemical modifier, and the losses caused by the introduction of SAP into the cement system, the effectiveness of the use of CB-2 and CB-3, due to strength compensation, in combination with SAP modification B3 (

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Concretes, composite, binder, superabsorbent, strength, polymer

Короткий адрес: https://sciup.org/143180503

IDR: 143180503   |   DOI: 10.4123/CUBS.108.3

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