Article
Construction & Building Technology
Miao-Miao Song, Feng Ji, Gui-Zhong Xu, Fa-Hong Wu, Da Yao
Summary: This research found that low-temperature curing has a detrimental influence on the unconfined compressive strength of cemented lean clay. However, an increase in strength was observed when the curing temperature rose to 20 degrees C, and the recovery depended on the initial low-temperature curing time.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Engineering, Environmental
Yousef Heidarizadeh, Seyed Hamid Lajevardi, Mohammad Sharifipour, Mohsen Kamalian
Summary: The study systematically investigated the small strain shear stiffness of soft clay stabilized with cement and nano-SiO2 through a series of bender element tests. Experimental results showed that the shear stiffness of the stabilized clay significantly increased with higher cement content, nano-SiO2 percentage, and longer curing time. The findings also suggested that nano-SiO2 can be used as a supplementary pozzolan to reduce the required cement content in the mixture for environmental considerations.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Construction & Building Technology
Zefeng Tao, Yu Zhang, Xinran Chen, Xiaoming Gu
Summary: The stability and durability of the subgrade structure in seasonally frozen areas can be enhanced by adding cement and fiber to silty clay. Results show that the mechanical properties of the composite treated soil change significantly after the first freeze-thaw process, but tend to stabilize after six cycles. Different types and dosages of fiber have an impact on the performance of the composite treated soil, with polypropylene fiber showing better results than basalt fiber.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Seyed Hassan Jafari, Seyed Hamid Lajevardi, Mohammad Sharifipour, Mohsen Kamalian
Summary: This study investigates the impact of adding nano-SiO2 and lime to the stabilization of clay soil, showing that a certain level of addition of these materials leads to a significant increase in soil characteristics and compressive strength. The correlation developed between small strain properties and unconfined compressive strength could serve as a quick and convenient reference for evaluating shear stiffness without the need for dynamic experiments.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Geological
Y. Heidarizadeh, S. H. Lajevardi, M. Sharifipour
Summary: This study investigates the dynamic properties of sandy soil mixtures with different cement contents and polypropylene fiber percentages. The results show that a mixture with 7% cement content and 0.4% polypropylene fiber reinforcement provides the best shear wave velocity and shear stiffness.
SOIL MECHANICS AND FOUNDATION ENGINEERING
(2022)
Article
Polymer Science
Jiahao Ye, Ping Jiang, Lejie Chen, Xuhui Zhou, Fei Rao, Xinyi Tang
Summary: Using fiber and cement to modify waste slurry and applying it to roads is an effective method of recycling waste slurry. This study prepared a new type of road material, fiber-cement-modified waste slurry (FRCS), and investigated the static and dynamic characteristics of the cement soil through tests. The results indicate that FRCS with an optimum fiber content of 0.75% exhibits enhanced tensile properties and improved ductility, making it suitable for road engineering applications.
Article
Engineering, Civil
Tennison Freire de Souza Junior, Karla Salvagni Heineck, Cezar Falavigna Silva, Francisco Dalla Rosa
Summary: This study focuses on the mechanical behavior of cohesive frictional soil in Passo Fundo, Brazil, improved by Portland cement of high initial strength. The results show the significant effects of cement content and dry density on soil behavior and provide normalized curves for practical dosages of ground improvement.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Engineering, Geological
Zi Ying, Yu-Jun Cui, Nadia Benahmed, Myriam Duc
Summary: Lime treatment can significantly increase the small strain shear modulus (G(max)) of soil, providing good resistance to wetting-drying cycles. However, the effect can be altered depending on factors such as wetting fluid and soil state. While untreated soil softens and damages during wetting-drying cycles, lime-treated soil maintains its resistance and reversible pore size distributions.
ENGINEERING GEOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Chunlei Li, Long Yu, Xianjing Kong, Heyue Zhang
Summary: This study simulated the continuous penetration of a spherical penetrometer (ball) into softening and rate-dependent soil, revealing three stages from shallow failure mechanism to deep flow-round mechanism. The effects of strain rate and softening parameters on the failure mechanism and the evolved bearing factor profile were investigated. The dimensionless soil strength sum /gamma ' D and the frictional condition of the soil-ball interface were explored as well. Empirical formulas were developed to estimate the critical depths of the ball penetration test. A practical interpretation framework, incorporating the effects of strain rate and softening, was developed to assess the soil undrained shear strength using the ball penetrometer.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Environmental
Seyed Hassan Jafari, Seyed Hamid Lajevardi
Summary: This study investigates the effect of freeze-thaw cycles on the strength and stiffness properties of clay soil stabilized with nanosilica and lime. The results show that adding nanosilica and lime can improve the strength and small strain shear modulus of the clay, but freeze-thaw cycles lead to a reduction in these properties.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Construction & Building Technology
Lei Zhang, Jun Shi, Qianzhuo Peng, Cheng Chen
Summary: This study investigates the dynamic behavior of cement-treated marine clays through cyclic triaxial tests and considers the effects of factors such as confining pressure, loading frequency and cycle, cement content, strain amplitude, and curing period on their dynamic properties. The results show that the cement content and strain amplitude have the most significant influence on the dynamic properties of cement-treated clays. The equivalent shear modulus and damping ratio decrease significantly within the first few loading cycles and then remain relatively unchanged.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Peiling Tan, Fuming Wang, Chengchao Guo, Jun Liu
Summary: This study investigates the dynamic properties and microstructural mechanisms of using permeable water-soluble polyurethane (PSP) to improve red clay. The inclusion of PSP significantly enhances the mechanical properties of red clay and under specific conditions, further improves its engineering performance.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Construction & Building Technology
Yuan-shun Shen, Yong Tang, Jie Yin, Mei-ping Li, Ting Wen
Summary: The experimental investigation showed that adding lime or cement at a certain fiber content significantly increased the strength properties of the soil, with cement having a better improvement effect than lime. Fiber-reinforced specimens with lime or cement treatment exhibited strain-softening behavior, with higher residual strength compared to untreated specimens. The stress and strain curve for specimens with higher fiber content was higher than those with lower fiber content, indicating a better improvement effect in engineering applications.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jianqiang Wang, Yu Song, Shuaishuai Dong, Song Ding, Yukun Geng, Xiaotong Gao
Summary: Temperature, zinc contamination concentration, and surrounding pressure have significant effects on the mechanical properties of Guilin red clay. The stress-strain curves of the red clay show strain-hardening behavior, with increase in temperature and zinc contamination concentration resulting in increased shear strength. Furthermore, the deformation modulus tends to increase initially with increasing strain but then decreases.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Jue Li, Junfeng Qian, Chengjun He
Summary: This study comprehensively quantifies the potential of cement-treated red sandstone coarse-grained soil as a subgrade filler in highway engineering. The compaction characteristics and shear strength of the soil improved by cement are investigated. The results show that the CBR value and maximum dry density of the soil increase with cement content. Moreover, the addition of cement increases the shear strength and reduces the dilatancy of the soil. The electron microscopy scanning results indicate that the crystallites produced by cement hydration are the main reason for improving the shear strength of the soil.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Geological
Negin Zhalehjoo, Didier Bodin, Geoffrey Jameson, Andrew Papacostas, Ross Guppy
Summary: Foamed bitumen stabilization is a sustainable solution for construction and rehabilitation of pavements, and it improves pavement performance. This paper focuses on the development of a fatigue relationship for Foamed bitumen stabilized (FBS) materials, which will assist in thickness design of FBS flexible pavements.
GEOTECHNICAL TESTING JOURNAL
(2024)
Article
Engineering, Geological
Alejandra Lopez Ramirez, Yinning Zhang, Juha Forsman, Leena Korkiala-Tanttu
Summary: This paper presents the results of an extensive testing program on the stabilization of Finnish soft clay using low emissions binders. The alternative binders, including by-products and pozzolanas, showed higher strength than traditional binders at various densities. Additionally, a simplified CO2 emissions calculation procedure for DDM design and different emissions factors for the investigated binders were proposed.
GEOTECHNICAL TESTING JOURNAL
(2024)
Article
Engineering, Geological
Ashray Saxena, V. Vinay Kumar, Natalia S. Correia, Jorge G. Zornberg
Summary: Reclaimed asphalt pavement (RAP) is widely used in road construction due to its economic and environmental benefits. This study evaluates the millability and recyclability of asphalt layers with paving interlayers (GRAP). It finds that GRAP can be reused in base and surface courses, leading to sustainable roadway construction practices.
GEOTECHNICAL TESTING JOURNAL
(2024)
Article
Engineering, Geological
Buddhima Indraratna, Chathuri M. K. Arachchige, Cholachat Rujikiatkamjorn, Ana Heitor, Yujie Qi
Summary: This article discusses the recycling of waste materials produced in the coal and steel industry as well as the reusing of waste tires, which is a high priority in Australia's urban infrastructure development for environmental preservation. The practical applications of these waste materials in coastal reclamation and road and rail construction are presented, along with comparisons to traditional quarried materials. The research outcomes demonstrate that properly engineered waste mixtures can exceed current technical standards and reduce maintenance intensity, supporting sustainable solutions for future transportation infrastructure development.
GEOTECHNICAL TESTING JOURNAL
(2024)