Article
Chemistry, Physical
Jerzy Kukielka, Wojciech Bankowski, Krzysztof Mirski
Summary: The study described the properties of asphalt-cement concrete (ACC) with reclaimed asphalt pavement (RAP), Portland cement, sand, and rubber powder as a material for road pavements, and analyzed the laboratory test results.
Article
Construction & Building Technology
Bin Lei, Qianghui Xiong, Hanbing Zhao, Wenkui Dong, Vivian W. Y. Tam, Zhihui Sun, Wengui Li
Summary: This study investigates the feasibility of using recycled concrete powder (RCP) as fillers in asphalt mortar to achieve sustainable and economical asphalt production. The physical properties of limestone powder (LSP) and RCP are analyzed and compared, including surface roughness, pore structures, and particle size. It is found that RCP is more effective than LSP in enhancing the performance of asphalt mortar. The interactions of RCP and LSP with asphalt mainly depend on physical interactions rather than chemical reactions. The use of RCP as fillers can improve the high-temperature rutting resistance of asphalt mortar.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Polymer Science
Sang-Yum Lee, Young-Man Yun, Tri Ho Minh Le
Summary: This research demonstrates the quantitative impact of incorporating epoxy resin and crumb rubber powder into cement asphalt mortar for railway track stabilization. The modified mortar exhibits improved flowability, mixing stability, and compressive strength compared to traditional formulations. It also showcases robust resistance to environmental challenges, including acid and freeze-thaw conditions, and effectively prevents settlement in a mock-up test simulating real-world conditions.
Article
Construction & Building Technology
Haoxin Li, Dayou Ni, Guangwei Liang, Yuchen Guo, Biqin Dong
Summary: Increasing curing temperature can enhance the strength of cement paste/mortar modified by VAEC dispersible powder, but excessively high temperature may have adverse effects. Elevated temperatures facilitate the formation of carboxyl-containing substances, refine pores, reduce the thickness of the polymer film, and increase pores in the polymer film.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yunliang Li, Chengyu Tian, Yubo Fu, Yiqiu Tan
Summary: This study investigates the fracture parameters and influencing factors of cement asphalt mortar (CAM) with high asphalt content using the semi-circular bending (SCB) test. The results show that temperature, loading rate, notch depth, and material ratio all have an impact on the fracture parameters of CAM. Additionally, the microstructure and pore characteristics of CAM were examined to gain a better understanding of its fracture performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Shuqing Yang, Jian-Xin Lu, Chi Sun Poon
Summary: The study found that recycling waste glass into cement mortar can improve its high temperature compressive strength, but excessive use of glass materials can soften the mortar, requiring careful control of the dosage.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Construction & Building Technology
Jihane Moudar, Nisrine El Fami, Abdeljebbar Diouri, M'hamed Taibi
Summary: The purpose of this study is to utilize waste glass and shells as alternative raw materials for the production of belite-rich clinkers, and investigate the hydration characteristics of resulting mortars. The raw materials were ground, mixed, and synthesized through heat treatment to form the belite phase. Various proportions of belitic clinker were mixed with shell powder and gypsum to synthesize the cements. The mineralogy and mechanical strength of the hydrated samples were analyzed using XRD, SEM, EDS, FT-IR, and measured at different curing times.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Huasheng Zhu, Xiaohui Zeng, Xuli Lan, Hao Song, Guangcheng Long, Youjun Xie
Summary: This study found that high temperatures significantly increase the creep degree and rate of CA mortar, resulting in changes in its mechanical properties and microstructure.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
Cong Ma, Xiaoming Zhao, Jinyan Shi, Jing Tao, Haijun Zhou, Biqin Dong, Yanliang Du
Summary: A novel magnesium phosphate cement-based CEA (MEA) mortar was prepared and its properties were systematically investigated. The MEA mortar exhibited a setting time within 30 min and a compressive strength of 15-45 MPa. Increasing the emulsified asphalt to cement ratio reduced the strength, water resistance, and frost resistance of the MEA mortars, while adding emulsified asphalt with low water content improved the setting time and failure strain compared to plain magnesium phosphate cement. This study provides an alternative material for track slab maintenance.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
S. H. Chu
Summary: Built on the VCD approach, this study aims to assess the sustainability and robustness of mortar mixtures by varying the paste and aggregate phases. The use of sand as a replacement for cementitious paste volume (CPV) effectively reduces cement consumption for improved sustainability. However, decreasing CPV leads to decreased workability, especially when it falls below a certain limit. To address this issue, concurrent paste replacement and sand proportioning methods were proposed for optimal mortar performance with minimal cement content. An experimental program was conducted to investigate the effects of CPV and sand proportioning on sustainability, workability, and strengths, and the optimal values were identified for the design of ULCC. Furthermore, the ULCC mechanism was explained based on particle packing and film thickness theory.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Yongliang Liu, Mulan Mu, Junjie Wang
Summary: The compressive deformation and failure modes of cement-asphalt mortar (CAM) with different asphalt-cement ratios (A/Cs) were studied, showing that CAMs with low A/Cs exhibited quasi-brittle failure, while CAMs with high A/Cs showed ductile behavior. Temperature had a negligible effect on low A/C CAMs, but a significant effect on high A/C CAMs. Microstructural models demonstrated that the deformation and failure of CAMs depended on their matrix composition. The boundary A/C value between CAMs with different behavior was around 0.6.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Engineering, Civil
Huasheng Zhu, Xiaohui Zeng, Xuli Lan, Guangcheng Long, Youjun Xie
Summary: This study investigated the effect of various stress levels on the creep of CA mortar and proposed a new and more accurate creep model based on the micro-meso structure characteristics.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Review
Construction & Building Technology
Shunjun Jiang, Jiusu Li, Zhu Zhang, Hongshan Wu, Guanlan Liu
Summary: CEAM is an essential component in the ballastless slab track system, with various important functions. The mass ratio of asphalt to cement has the most significant influence on CEAM performance. Future research should focus on sustainability and further analyze the interaction mechanism between materials from a microscopic perspective.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Chaofeng Liang, Xin Liu, Zhiyu Zhang, Changqing Wang, Zhiming Ma
Summary: The reuse of geopolymer waste as a supplementary cementitious material has been examined in this study. The addition of geopolymer waste negatively impacted the paste micro-structure and increased the percentages of harmful and more harmful pores. The use of active admixtures improved the performance of WGP blended mortar.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Zuzanna Zofia Wozniak, Adrian Chajec, Lukasz Sadowski
Summary: The waste granite powder from the production of granite can cause health problems for people living nearby. However, it can be partially used as a replacement for cement in masonry mortars, although it may affect the properties of the mortar.
