Experimental Study on Mechanical Characteristics of Stabilized Soil with Rice Husk Carbon and Calcium Lignosulfonate DOI Open Access

Haiying Zhang,

Hongxia Li,

Hongze Zhang

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5201 - 5201

Published: Oct. 25, 2024

In cold regions, the extensive distribution of silt exhibits limited applicability in engineering under freeze–thaw cycles. To address this issue, study employed rice husk carbon and calcium lignosulfonate to stabilize from areas. The mechanical properties stabilized conditions were evaluated through unconfined compressive strength tests triaxial shear tests. Additionally, scanning electron microscopy was utilized analyze mechanisms behind stabilization. Ultimately, a damage model for carbon–calcium constructed based on Weibull function Lemaitre’s principle equivalent strain. findings indicate that as content increases, rate improvement progressively accelerates. With an increase number cycles, deviatoric stress soil gradually diminishes; decline peak becomes more gradual, while reduction cohesion intensifies. decrease angle internal friction is relatively minor. Microscopic examinations reveal cycles pores tend enlarge multiply. established applied loads demonstrates similar pattern between experimental theoretical curves four different confining pressures, reflecting initial rapid followed by steady trend. Thus, it evident outperforms traditional constitutive models, offering accurate depiction variations observed.

Language: Английский

Numerical simulation study on the mechanical behaviors of frost‐damaged recycled sand powder concrete DOI Open Access

Quan Ma,

Jianzhuang Xiao, Wei Yang

et al.

Structural Concrete, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract This study established a multiphase, three‐dimensional finite element model of recycled sand powder concrete (RSPC) using the ABAQUS software. A freeze–thaw damage based on deterioration mechanical properties was developed from experimental test results and applied to micro‐scale numerical simulation. The indicated that RSPC deteriorate with increasing cycles, defects in micro‐powder fine aggregates become more pronounced during process. simulation showed maximum error 12.97% compared data (all within 15%), confirming validity model. Specimen failure primarily concentrated at bonding interface between new/old mortar, an overall “X‐shaped” pattern. Furthermore, as number cycles increased, ITZ2 (the interfacial transition zone old mortar) accelerated propagation concrete, significantly amplifying internal RSPC.

Language: Английский

Citations

0
Interfacial strength characteristics of steel fibers embedded in ultra-high-performance concrete under salt freeze-thaw environments DOI

Zihao Yu,

Junyi Yang, Jianguang Xu

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 475, P. 141215 - 141215

Published: April 11, 2025

Language: Английский

Citations

0
Salt-frost damage characterization of simulant multiple ITZs in nano-silica modified recycled aggregate concrete DOI
Hongrui Zhang,

Haidong Xu,

Jiuwen Bao

et al.

Materials Today Communications, Journal Year: 2024, Volume and Issue: 41, P. 110296 - 110296

Published: Sept. 4, 2024

Language: Английский

Citations

3
Experimental Study on Mechanical Characteristics of Stabilized Soil with Rice Husk Carbon and Calcium Lignosulfonate DOI Open Access

Haiying Zhang,

Hongxia Li,

Hongze Zhang

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5201 - 5201

Published: Oct. 25, 2024

In cold regions, the extensive distribution of silt exhibits limited applicability in engineering under freeze–thaw cycles. To address this issue, study employed rice husk carbon and calcium lignosulfonate to stabilize from areas. The mechanical properties stabilized conditions were evaluated through unconfined compressive strength tests triaxial shear tests. Additionally, scanning electron microscopy was utilized analyze mechanisms behind stabilization. Ultimately, a damage model for carbon–calcium constructed based on Weibull function Lemaitre’s principle equivalent strain. findings indicate that as content increases, rate improvement progressively accelerates. With an increase number cycles, deviatoric stress soil gradually diminishes; decline peak becomes more gradual, while reduction cohesion intensifies. decrease angle internal friction is relatively minor. Microscopic examinations reveal cycles pores tend enlarge multiply. established applied loads demonstrates similar pattern between experimental theoretical curves four different confining pressures, reflecting initial rapid followed by steady trend. Thus, it evident outperforms traditional constitutive models, offering accurate depiction variations observed.

Language: Английский

Citations

1