TY - JOUR

T1 - Rock Reinforcement by Stepwise Injection of Two-Component Silicate Resin

AU - Shilova, Tatiana

AU - Serdyukov, Aleksander

AU - Serdyukov, Sergey

AU - Ivanova, Oksana

N1 - Funding Information: Financial support for this work was provided by the Russian Science Foundation and the Government of the Novosibirsk Region, Russia under the grant No. 22-27-20126, https://rscf.ru/project/22-27-20126/ to Tatiana Shilova and Aleksander Serdyukov. Publisher Copyright: © 2022 by the authors.

PY - 2022/12

Y1 - 2022/12

N2 - Our research aims to improve the efficiency of the reinforcement of loose rocks with two-component polymer resins. The standard approach consists of the injection of two pre-mixed components into a rock massive. We propose a stepwise injection of individual components of a resin into the rock and deep extrusion of the solutions into the rock by gas between the injection stages. The experimental results indicate that the proposed method provides a reduction of polymer consumption per unit volume of the rock, and an increase in the impregnation depth, area of the resin impact, and the reinforced rock volume in comparison with the conventional method of prepared resin solution injection. The cured resin partially fills the sand rock pore space, binds the grains, and acts as a reinforcing frame. The highest reinforcement is achieved with the sequential stepwise injection of the resin by separate small portions of each component. We have shown the uniaxial compressive strength is on average more than twice as high that obtained with the conventional injection method. This can be explained by higher fracture toughness of the reinforced rock with a flexible hardened network of the cured resin in the structure.

AB - Our research aims to improve the efficiency of the reinforcement of loose rocks with two-component polymer resins. The standard approach consists of the injection of two pre-mixed components into a rock massive. We propose a stepwise injection of individual components of a resin into the rock and deep extrusion of the solutions into the rock by gas between the injection stages. The experimental results indicate that the proposed method provides a reduction of polymer consumption per unit volume of the rock, and an increase in the impregnation depth, area of the resin impact, and the reinforced rock volume in comparison with the conventional method of prepared resin solution injection. The cured resin partially fills the sand rock pore space, binds the grains, and acts as a reinforcing frame. The highest reinforcement is achieved with the sequential stepwise injection of the resin by separate small portions of each component. We have shown the uniaxial compressive strength is on average more than twice as high that obtained with the conventional injection method. This can be explained by higher fracture toughness of the reinforced rock with a flexible hardened network of the cured resin in the structure.

KW - extrusion of solutions by gas

KW - rock reinforcement

KW - sand rock

KW - stepwise injection

KW - strength properties

KW - structure

KW - two–component silicate resin

UR - http://www.scopus.com/inward/record.url?scp=85143611386&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/1365de04-88d2-3c56-a029-46fc3d3c8e0f/

U2 - 10.3390/polym14235251

DO - 10.3390/polym14235251

M3 - Article

C2 - 36501644

AN - SCOPUS:85143611386

VL - 14

JO - Polymers

JF - Polymers

SN - 2073-4360

IS - 23

M1 - 5251

ER -