Delayed-Expansion Capsule Sealing Material for Coal Mine Overburden Isolated Grouting DOI Creative Commons
Dayang Xuan, Xuewei Ning,

Kaifang Lu

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(24), P. 11595 - 11595

Published: Dec. 12, 2024

Grouting technology is an important method of ground reinforcement and can effectively improve the stability engineering rock mass. During overburden isolated grouting in coal mines, influence unexpected fractures may lead to substantial grout leakage, resulting ineffective grouting. The existing natural sedimentation sealing mainly applicable small low flow, while chemical-reagent rapid-sealing cause channel blocking, making it less suitable for This paper proposes a “capsule” method, detailing preparation material evaluation its properties through testing. material, prepared using air suspension was coated with paraffin on superabsorbent polymer (SAP) which has delayed expansion characteristics. Although this does not expand within rock, expands rapidly upon entering leakage channel, accumulating achieve effective sealing. A simulation experimental system designed simulate slurry characteristics were experimentally investigated. Under consistent particle size conditions, higher film cover ratio led more pronounced effect extended time required maximum expansion. When content sizes 20 mesh, 40 60 20% 1.0%, below 4 mm sealed. fracture aperture 4–6 mm, covering or 30% should have minimum 1.5%, 50% 2.0%. findings study outline prevention control abnormal engineering.

Language: Английский

Green Recycled Aggregate in Concrete: Feasibility Study DOI Open Access
Magdalena Bardan, L. Czarnecki

Materials, Journal Year: 2025, Volume and Issue: 18(3), P. 488 - 488

Published: Jan. 22, 2025

With increasing concrete production, CO2 emissions rise, and natural resources deplete, creating a need for new material solutions. This article analyzes the feasibility of using green materials, like recycled aggregate (RA) from construction demolition waste (CDW) to be incorporated into (RAC). The objective this paper is determine that use RA ensures receiving sustainable in comparison with NA LA. sustainability assessment was conducted based on an analysis life cycle terms environmental, economic, public perception aspects. Additionally, extended include two newly introduced indicators: quality aggregates performance. A proprietary scoring method ideal characteristics used, which enhanced by innovative multidimensional analysis, credits assigned literature review artificial intelligence (AI) statistical tools partially assist selection items. results could even show outperformed (NA) (light) (LA) environmental (over 80% results) as well economic 65%) categories 80%). However, ranked second behind performance, LA lowest. highlight RAC satisfactory option compared NAC, supporting circular economy reducing waste, emissions, resource consumption. best solution would hybrid containing partial substitute form aggregates, enabling advantages both types complement each other offset their limitations.

Language: Английский

Citations

2
Microwave sintering of fly ash-recycled concrete sludge cake-mixed powder for carbon fixation DOI

Takéshi Miyata,

Souma Yamamoto,

Keiichiro Kashimura

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 475, P. 141040 - 141040

Published: April 11, 2025

Language: Английский

Citations

0
Fenton-like catalytic cementitious coating with CoMnFe-LDH@recycled concrete powder for water treatment: In-situ degradation of oxytetracycline and enhanced carbonation curing DOI
Shengxian Cao, Anming She, Cheng Ye

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 472, P. 140908 - 140908

Published: March 26, 2025

Language: Английский

Citations

0
Eco-Friendly Foam Concrete with Improved Physical and Mechanical Properties, Modified with Fly Ash and Reinforced with Coconut Fibers DOI
Alexey N. Beskopylny, Sergey A. Stel’makh, Evgenii M. Shcherban’

et al.

Construction Materials and Products, Journal Year: 2025, Volume and Issue: 8(1), P. 1 - 1

Published: Jan. 17, 2025

The development of new types environmentally friendly and cost-effective building materials is currently a relevant topic actively developing throughout the world. In modern construction science, most popular direction concrete compositions using waste various origins. objective this study to develop foam local from fuel energy complex plant natural fibers. To determine optimal amount modifying additive fly ash (FA), 7 experimental with different percentages cement replacement by FA were made. content was established as optimal. Foam 15% has lowest density 1075 kg/m3 minimum thermal conductivity coefficient 0.248 W/m × °C, well increases in compressive bending strength 23.3% 21.7%, respectively. effect coconut fiber (CF) assessed on composition modified 15%. dosage CF 0.6%. As result modification dispersed reinforcement, obtained. increase 30.14% 72.83%, respectively, compared conventional concrete. decreased 9.8% 8.34%, results obtained during studies prove effectiveness proposed formulation solutions allow obtaining an energy-efficient composite improved characteristics.

Language: Английский

Citations

0
Delayed-Expansion Capsule Sealing Material for Coal Mine Overburden Isolated Grouting DOI Creative Commons
Dayang Xuan, Xuewei Ning,

Kaifang Lu

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(24), P. 11595 - 11595

Published: Dec. 12, 2024

Grouting technology is an important method of ground reinforcement and can effectively improve the stability engineering rock mass. During overburden isolated grouting in coal mines, influence unexpected fractures may lead to substantial grout leakage, resulting ineffective grouting. The existing natural sedimentation sealing mainly applicable small low flow, while chemical-reagent rapid-sealing cause channel blocking, making it less suitable for This paper proposes a “capsule” method, detailing preparation material evaluation its properties through testing. material, prepared using air suspension was coated with paraffin on superabsorbent polymer (SAP) which has delayed expansion characteristics. Although this does not expand within rock, expands rapidly upon entering leakage channel, accumulating achieve effective sealing. A simulation experimental system designed simulate slurry characteristics were experimentally investigated. Under consistent particle size conditions, higher film cover ratio led more pronounced effect extended time required maximum expansion. When content sizes 20 mesh, 40 60 20% 1.0%, below 4 mm sealed. fracture aperture 4–6 mm, covering or 30% should have minimum 1.5%, 50% 2.0%. findings study outline prevention control abnormal engineering.

Language: Английский

Citations

0