Article
Construction & Building Technology
B. V. Venkatarama Reddy, R. Sri Bhanupratap Rathod
Summary: The paper investigates the performance of steel studs embedded cement stabilised rammed earth (CSRE) in terms of compression, shear, and flexure. The results show that the introduction of shear studs significantly improves the shear and flexural strength of CSRE, and helps prevent catastrophic failures.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
R. Sri Bhanupratap Rathod, B. V. Venkatarama Reddy
Summary: Cement stabilised rammed earth (CSRE) is a load-bearing wall material used in buildings and structures, with increasing interest worldwide. The addition of short coir fibres in CSRE significantly improves its mechanical properties, such as failure strains, energy absorption capacity, and splitting tensile strength, and helps prevent sudden catastrophic failures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
R. Sri Bhanupratap Rathod, B. V. Venkatarama Reddy
Summary: The study focuses on the reinforcement effect of coir fibers on CSRE, revealing that adding 1% fiber volume fraction can enhance the compressive strength of CSRE. The addition of fibers also improves the ductility and energy absorption capacity of the material.
MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
Tiegang Zhou, Huiyuan Zhang, Zaiyu Zhang, Liangyi Zhang, Wei Tan
Summary: Rammed earth construction has unique advantages and has attracted attention for its energy-saving, environmental-friendly, low-cost, easily accessible materials, and suitability for living. The failure mode of rammed earth buildings after earthquakes is mainly shear failure, with significant slip failure at the interface of adjacent rammed layers. There is a lack of research on the cracking and slip phenomena between rammed earth layers and the shear parameters between and within rammed earth layers. This study compared the interlayer and intralayer shear behavior of rammed earth in four aspects and explored the causes and laws of interlayer interface and intra-layer shear failures. The results provided data for optimizing the interlayer interface and determining the shear resistance parameters of rammed earth.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Alexandra H. Meek, Christopher T. S. Beckett, Mohamed Elchalakani
Summary: Developing low-embodied energy building materials is crucial for reducing global greenhouse gas emissions. This study examines the corrosion of reinforcement embedded within rammed earth materials in different conditions. While alternative stabilisers show promising results, precautions should be taken to avoid corrosion of reinforcement, suggesting the use of galvanised, stainless steel or fibre reinforced polymers in place of mild steel.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Satya Sai Deep Raavi, Deb Dulal Tripura
Summary: This research investigates the effect of coir, bamboo and steel reinforcement on the compressive strength of cement stabilized rammed earth wallettes. The experimental results show that the addition of coir significantly improves the compressive strength of the samples and changes the failure mechanism from brittle to ductile. The study also found that rectangular samples have lower strength and higher deformation compared to square samples.
Article
Construction & Building Technology
Tausif E. Elahi, Azmayeen Rafat Shahriar, Mohammad Shariful Islam
Summary: The study investigates the performance of Compressed Stabilized Earth Blocks (CSEB) stabilized with cement and fly ash, as an alternative to traditional Fired Clay Bricks (FCB). Results show that addition of fly ash can improve strength characteristics and reduce cement content in the mix, while enhancing durability of the blocks. Life Cycle Analysis (LCA) reveals that CSEBs are environmentally superior to FCBs.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Lukasz Rosicki, Piotr Narloch
Summary: This study aims to test the deterioration of cement stabilized rammed earth in natural weather conditions and describe its long-term properties. The results show that despite minimal wear in appearance, the strength characteristics of the material deteriorate under natural weather conditions, especially in specimens with high cement content.
Article
Multidisciplinary Sciences
Mohammad Sharif Zami, Adeoluwa Oladapo Ewebajo, Omar S. Baghabra Al-Amoudi, Mohammed A. Al-Osta, Yassir Mubarak Hussein Mustafa
Summary: The practice of designing load-bearing walls with stabilized earth-based material is increasing in developed countries. This research aims to assess the compressive strength and durability of Hamrah Soil for construction. Stabilizing agents were added to enhance the structural properties of the soil. The study found that cement had a better effect on stabilizing the soil compared to lime.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Construction & Building Technology
Phuntsho Wangmo, Kshitij C. Shrestha, Takayoshi Aoki
Summary: This study conducted a series of element tests on rammed earth (RE) wallettes to evaluate compressive and shear strength, as well as explore strengthening techniques. By varying parameters like RE layer thickness and drying periods, the mechanical properties of RE wallettes were discussed, and finite element models were developed to simulate the results.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jelena Kaluder, Ivan Kraus, Ana Peric, Lucija Kraus
Summary: This study provides support for the conservation and preservation of traditional rammed earth houses in Croatia by analyzing and testing the materials and characteristics of these buildings.
APPLIED SCIENCES-BASEL
(2022)
Article
Soil Science
Damian Stefanow, Piotr A. Dudzinski
Summary: The paper discusses various methods for determining soil shear strength and highlights the significant impact of factors such as measurement speed and geometric parameters. It concludes with guidelines for selecting the most suitable method for accurately measuring soil traction properties.
SOIL & TILLAGE RESEARCH
(2021)
Article
Engineering, Civil
Moein Ramezanpour, Abolfazl Eslami, Hamid Ronagh
Summary: This experimental study investigates the in-plane seismic performance of unstabilised/stabilised rammed earth walls, finding that the level of vertical stress and stabiliser type affect the walls' hysteric response.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Liusheng He, Binod Khadka, Xiaobo Sun, Ming Li, Jiafei Jiang
Summary: This paper proposes the use of rammed earth filled steel tubular columns for sustainable building construction. Experimental tests were conducted to investigate both the material and member levels. The results show that adding cement significantly enhances the axial capacity of the rammed earth. A method to estimate the compressive strength considering the cement content is proposed. It is also suggested to control the strength ratio between the steel tube and infill rammed earth to fulfill the confinement effect.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Ceramics
Thanh-Phong Ngo, Vu To-Anh Phan, Dirk Schwede, Dang-Mao Nguyen, Quoc-Bao Bui
Summary: The study investigated the preparation and properties of geopolymer-stabilised compacted earth (GSCE). It was found that the chemical bond in the geopolymer had a significant impact on the compressive strength of GSCE. Results showed that the compressive strength of GSCE continued to increase over time, with a 20-25% increase observed after 28 days.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2022)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)