Qinyong Ma
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View article: Experimental study on the flexural performance of concrete hollow composite slabs with tightly connected panel sides
Experimental study on the flexural performance of concrete hollow composite slabs with tightly connected panel sides Open
The performance of joint connections in composite slabs is crucial for ensuring their bidirectional load-bearing capacity and overall structural integrity. To effectively address the challenge of protruding rebar in precast components, a n…
View article: Study on the performance mechanism of alumina-alkali activator synergistic solidified lunar soil simulant
Study on the performance mechanism of alumina-alkali activator synergistic solidified lunar soil simulant Open
The utilization of lunar in-situ resources is an important way to realize the construction and operation of Moon scientific research base. The effect of alumina-alkali activator on the mechanical properties of solidified lunar soil simulan…
View article: Experimental study on the flexural performance of concrete hollow composite slabs with tightly connected panel sides
Experimental study on the flexural performance of concrete hollow composite slabs with tightly connected panel sides Open
In order to investigate the mechanical performance and failure modes of laterally connected precast hollow core composite slabs with board-side dense splicing, static model bending performance tests were conducted on three tightly connecte…
View article: Damage constitutive model of lunar soil simulant geopolymer under impact loading
Damage constitutive model of lunar soil simulant geopolymer under impact loading Open
Lunar base construction is a crucial component of the lunar exploration program, and considering the dynamic characteristics of lunar soil is important for moon construction. Therefore, investigating the dynamic properties of lunar soil by…
View article: Performance of a New Grouting Material under the Coupling Effects of Freeze–Thaw and Sulfate Erosion
Performance of a New Grouting Material under the Coupling Effects of Freeze–Thaw and Sulfate Erosion Open
In order to study the performance of a new cement-based grouting material under the coupling of freeze–thaw cycle and sulfate erosion, tests related to the performance of the new grouting material were designed and carried out to analyze t…
View article: Mechanical Properties and Damage Evolution of Concrete Materials Considering Sulfate Attack
Mechanical Properties and Damage Evolution of Concrete Materials Considering Sulfate Attack Open
In order to study the durability of concrete materials subjected to sulfate attack, in a sulfate attack environment, a series of concrete tests considering different fly ash contents and erosion times were conducted. The mechanical propert…
View article: Effect of Basalt Fiber on Static and Dynamic Mechanical Properties of Metakaolin‐Based Cement Clay
Effect of Basalt Fiber on Static and Dynamic Mechanical Properties of Metakaolin‐Based Cement Clay Open
To investigate the effects of basalt fiber content on the mechanical properties and microstructure characteristic of metakaolin‐based cement clay, the static and dynamic uniaxial compressive and splitting tensile, nuclear magnetic resonanc…
View article: Effect of Polyester Fiber on Air Voids and Low‐Temperature Crack Resistance of Permeable Asphalt Mixture
Effect of Polyester Fiber on Air Voids and Low‐Temperature Crack Resistance of Permeable Asphalt Mixture Open
With the rapid development of asphalt pavement, the drainage capacity of asphalt pavement is becoming more and more demanding. Therefore, it is imperative to study the permeable asphalt mixture. The air voids and the connected air voids ar…
View article: Effect of hydrothermal coupling on energy evolution, damage, and microscopic characteristics of sandstone
Effect of hydrothermal coupling on energy evolution, damage, and microscopic characteristics of sandstone Open
Heat–cool (H–C) cycle is a serious natural weathering mechanism for rock engineering in temperate desert climate; meanwhile, engineering rocks usually involve responses to impact loads arising from blasting operation, mechanized constructi…
View article: Dynamic Behavior and Energy Evolution Characteristic of Deep Roadway Sandstone Containing Weakly Filled Joint at Various Angles
Dynamic Behavior and Energy Evolution Characteristic of Deep Roadway Sandstone Containing Weakly Filled Joint at Various Angles Open
Dynamic impact tests were carried out by implying split‐Hopkinson pressure bar (SHPB) apparatus under three‐dimensional stress state to investigate the influences of weakly filled joint at seven kinds of angles on dynamic behavior and ener…
View article: Effect of Basalt Fiber Addition on Static‐Dynamic Mechanical Behaviors and Microstructure of Stabilized Soil Compositing Cement and Fly Ash
Effect of Basalt Fiber Addition on Static‐Dynamic Mechanical Behaviors and Microstructure of Stabilized Soil Compositing Cement and Fly Ash Open
The purpose of this article is to evaluate the influence of basalt fiber content on the static‐dynamic mechanical properties and microstructure of cement‐fly ash‐stabilized soil. The optimum mixed contents of cement and fly ash were obtain…
View article: Dynamic Mechanical Properties and Failure Mode of Artificial Frozen Silty Clay Subject to One‐Dimensional Coupled Static and Dynamic Loads
Dynamic Mechanical Properties and Failure Mode of Artificial Frozen Silty Clay Subject to One‐Dimensional Coupled Static and Dynamic Loads Open
The dynamic stress‐strain relationship of artificial frozen silty clay under one‐dimensional coupled static and dynamic loads is obtained using modified split Hopkinson pressure bar (SHPB) equipment. The variation in dynamic compressive st…
View article: Effect of Nonparallel End Face on Energy Dissipation Analyses of Rocklike Materials Based on SHPB Tests
Effect of Nonparallel End Face on Energy Dissipation Analyses of Rocklike Materials Based on SHPB Tests Open
To evaluate the effect of nonparallel end face of rocklike specimens in SHPB tests, the characteristics of energy dissipation are analyzed based on numerical simulations for end‐face nonparallelism from 0% to 0.40% and Young’s modulus from…
View article: Coupled Effect of Water Temperature and Cyclic Wetting and Drying on Dynamic Mechanical Characteristics of Sandstone
Coupled Effect of Water Temperature and Cyclic Wetting and Drying on Dynamic Mechanical Characteristics of Sandstone Open
Considering the periodical moisture variation in deep rock masses, cyclic wetting and drying under high geothermal condition is a vital issue for the safety and stability of deep rock engineering. To investigate the coupled effect of water…
View article: Stress Uniformity Analyses on Nonparallel End‐Surface Rock Specimen during Loading Process in SHPB Tests
Stress Uniformity Analyses on Nonparallel End‐Surface Rock Specimen during Loading Process in SHPB Tests Open
To investigate the influence of nonparallel end‐surface on stress uniformity during loading process in rock SHPB test, SHPB numerical simulations have been carried out by LS‐DYNA when end‐face nonparallelism is within 0.40% and Young’s mod…
View article: Experimental Research on Microstructure and Physical‐Mechanical Properties of Expansive Soil Stabilized with Fly Ash, Sand, and Basalt Fiber
Experimental Research on Microstructure and Physical‐Mechanical Properties of Expansive Soil Stabilized with Fly Ash, Sand, and Basalt Fiber Open
Expansive soil is a source of risk to the foundations or subgrade engineering. Stabilization of expansive soil is imperative for practical engineering. A series of laboratory experiments were performed to analyze the physical‐mechanical pr…
View article: Experimental Study on Thermal Damage and Energy Evolution of Sandstone after High Temperature Treatment
Experimental Study on Thermal Damage and Energy Evolution of Sandstone after High Temperature Treatment Open
Thermal damage and energy evolution characteristics in process of impact failure of sandstone after high temperature treatment were studied by split Hopkinson pressure bar (SHPB) system. The ultrasonic P‐wave velocity, density, porosity, p…
View article: Energy Absorption Characteristics of Frozen Soil Based on SHPB Test
Energy Absorption Characteristics of Frozen Soil Based on SHPB Test Open
Dynamic compressive tests are performed in three frozen soil types under different stress states at freezing temperatures of −5°C and −15°C with impact loading pressures from 0.3 MPa to 0.6 MPa. The effects of frozen soil type, freezing te…
View article: Energy absorption characteristics of cement-soil under confining pressure based on SHPB test
Energy absorption characteristics of cement-soil under confining pressure based on SHPB test Open
Cement-soil has been widely used for engineering application. However, no attention has been paid to the energy absorption characteristics of cement-soil under impact loading. In this paper, a series of split Hopkinson pressure bar (SHPB) …
View article: Experimental research on the microstructure and compressive and tensile properties of nano-SiO2 concrete containing basalt fibers
Experimental research on the microstructure and compressive and tensile properties of nano-SiO2 concrete containing basalt fibers Open
Urban underground space resources are gaining increasing attention for the sustainable development of cities. Traditional concrete cannot meet the needs of underground construction. High-performance concrete was prepared using varying dosa…