Study on mechanical properties and constitutive model of cement and polypropylene fiber improved loess considering freeze-thaw cycles

Construction and Building Materials, Год журнала: 2025, Номер 462, С. 140011 - 140011

Опубликована: Янв. 18, 2025

Язык: Английский

---

Optimization of Synergy Among Granulated Blast Furnace Slag, Magnesium Oxide, and Basalt Fiber for the Solidification of Soft Clay

Materials, Год журнала: 2025, Номер 18(7), С. 1577 - 1577

Опубликована: Март 31, 2025

In order to reuse granulated blast furnace slag (GBFS) and low-strength soft clay (SC), this study developed a curing material using magnesium oxide (MgO) as an alkali activator excite the GBFS basalt fiber (BF) reinforcing prepare SC. The mixing ranges of GBFS, MgO, BF were established 9.48%~14.52%, 0.48%~5.52%, 0%~1.00454% dry mass, respectively, ratios three optimized central composite design (CCD) test. Through analysis variance, factor interaction analysis, parameter optimization CCD test, optimal mass ratio was determined be 13.35:4.47:0.26. named GMBF mixed with SC solidified clay. An equal amount ordinary Portland cement (OPC) taken formed form OPC mechanical properties, durability, hydration products clarified by unconfined compressive strength (UCS) freeze–thaw cycle X-ray diffraction (XRD) scanning electron microscopy (SEM) UCS 1.08 MPa 2.85 at 7 91 days, which 45.9% 33.8% higher than that (0.74 2.13 MPa) same time. After ten cycles, decreased from initial 1.59 0.7 MPa, decreases 44.2% 67.1%, respectively. By XRD SEM, mainly calcium silicate hydrate gel hydrotalcite. interface bonding bridging effect between or products, indicating these interactions contributed enhanced structural integrity. This demonstrates approach provides solution for recycling GBFS. Laboratory tests confirm potential formulation practical engineering applications.

Язык: Английский

---

Simultaneous influences of nanomaterial and fiber reinforcement on enhancing the mechanical performance of geopolymer stabilized soft clayey soils

Journal of Central South University, Год журнала: 2025, Номер 32(2), С. 597 - 623

Опубликована: Фев. 1, 2025

Язык: Английский

---

Experimental study on the performance of basalt fiber combined with cement-based material solidified shield waste mud under the coupled effects of acid corrosion and dry-wet cycles

Construction and Building Materials, Год журнала: 2025, Номер 463, С. 140110 - 140110

Опубликована: Янв. 24, 2025

Язык: Английский

---

Self-curing strategy of granite waste powder by calcined and alkaline activation: Mechanical and durability properties

Journal of Building Engineering, Год журнала: 2025, Номер unknown, С. 112214 - 112214

Опубликована: Фев. 1, 2025

Язык: Английский

---

Research on strength characteristics and mechanism of cement stabilized phosphogypsum materials under dry and wet cycles

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Март 22, 2025

Phosphogypsum can be used for mine filling, ecological restoration materials, road construction soil conditioning agent, cement retarder, etc., the comprehensive utilization rate of only about 40%, less than 10% huge demand raw materials projects, obviously a drop in bucket. In order to solve accumulation problem phosphogypsum, this paper closely combines major needs national highway construction, actively responds call Guizhou Provincial People's Government and Guiyang Municipal on phosphogypsum resources, researches strength decay law cement-stabilized under dry–wet cycle, considering complex climatic characteristics cycle with prerequisite high mixing, reveals mechanism decay, establishes regression model, discusses suitability as pavement base (sub-base) materials. The model was established, stabilized layer (sub-base layer) discussed. results show that unconfined compressive material decreases increase number dry wet cycles, is faster first four then gradually tends level off. cycles fitted negative exponential function, fitting parameters are all greater 0.98 . Cement dosage had most significant effect F-value = 988.407, followed by compaction least effect. maximum values RMSE MAE were 0.0862 0.0776 multifactorial equation which indicated reliability. Through research paper, pavements various grades different mixing amounts traffic volume conditions.

Язык: Английский

---

Impact of Curing Age and Capillary Action on Microstructural and Stress–Strain Response of a Geopolymer-Stabilized Sandy Soil

Journal of Materials in Civil Engineering, Год журнала: 2025, Номер 37(6)

Опубликована: Март 27, 2025

Язык: Английский

---

Mechanical behavior and strengthening mechanism of loess stabilized with xanthan gum and guar gum biopolymers

Materials Research Express, Год журнала: 2024, Номер 11(10), С. 105305 - 105305

Опубликована: Окт. 1, 2024

Abstract The structural properties of loess are susceptible to change when subjected external loads and complex environments, leading various geological disasters. To investigate the mechanical behavior strengthening mechanism stabilized with biopolymers such as xanthan gum guar gum, especially for soils low bearing capacity stability in engineering applications, we conducted research on improvement soil tests including unconfined compressive strength, disintegration, direct shear, microstructure were conducted. Among four different dosages (0%, 0.5%, 1%, 2%) curing ages (1 day, 3 days, 7 14 days), 2% content biopolymer days had greatest impact loess, Both shear well water solidified improve higher or prolonged time; however, disintegration rate decreases. Microscopic analysis indicates that effectively fill gaps between particles attach particle surfaces, forming fibrous reticular structures interparticle bonding ultimately increase strength loess. Xanthan can enhance erosion resistance water-holding capacity. These outcomes suggest have potential serve environmentally sustainable alternatives conventional stabilizers.

Язык: Английский

---

Investigation on the solidification effect and mechanism of loess utilizing magnesium oxysulfate cement as a curing agent

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 175214 - 175214

Опубликована: Авг. 5, 2024

Язык: Английский

---

Durability against cyclic wetting-drying of cement-stabilized loess subgrade for railway in tropical semi-arid regions

Construction and Building Materials, Год журнала: 2024, Номер 455, С. 139123 - 139123

Опубликована: Ноя. 17, 2024

Язык: Английский

---