Article
Construction & Building Technology
Anderson S. H. Chu
Summary: Concrete mixture design is the foundation of cement and concrete research. The current methods for concrete mixture design vary in the literature, compromising the accuracy and consistency in interpreting concrete properties. The volume-based mixture design method is superior to the mass ratio-based method in terms of simplicity, accuracy, and consistency. This research contributes to a unified volume-based design method to bridge the research community and the construction industry.
ACI MATERIALS JOURNAL
(2023)
Article
Construction & Building Technology
Yi Fang, Jialai Wang, Xin Qian, Liang Wang, Yijia Dong, Pizhong Qiao
Summary: This study investigates the use of tannic acid as an admixture in concrete to enhance its performance and eco-efficiency by modifying the structure of hydration products. Tannic acid can reduce total porosity and capillary pores in mortar, as well as increase packing densities and elastic modulus of hydration products. Additionally, the presence of tannic acid results in more uniform distribution of stress in concrete, leading to better mechanical performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ye Shi, Guangcheng Long, Xiaohui Zeng, Youjun Xie, Huihui Wang
Summary: GUHPC, with very low cement content, shows good mechanical performance and low environmental impact. Enhancing chemical effects through nanomaterials and chemical activator, along with multi-scale particles system, can improve the initial packing density of GUHPC.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ye Shi, Guangcheng Long, Xiaohui Zeng, Youjun Xie, Huihui Wang
Summary: The development of Green Ultra-High Performance Concrete (GUHPC) has attracted attention in the construction industry, with the potential to achieve high mechanical performance and low environmental impact by adding nanomaterials and chemical activator. Experimental results show that GUHPC with good mechanical properties and low environmental impact can be prepared with low cement content.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Automation & Control Systems
Swamy Naga Ratna Giri Pallapothu, Rathish Kumar Pancharathi, Rakesh Janib
Summary: This study presents an innovative approach using machine learning techniques and particle packing theories to predict concrete compressive strength, offering a more efficient and reliable method compared to traditional empirical models. The results demonstrate significant advancements in accurately estimating concrete strength, with the potential to revolutionize concrete mix design and improve construction practices.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Computer Science, Artificial Intelligence
Hossein Moayedi, Loke Kok Foong, Binh Nguyen Le
Summary: This paper presents three ANN-based prediction models to efficiently anticipate the compressive strength of concrete. Comparison of the prediction accuracies of these techniques is made, and the ERWCA-MLP method is found to be superior. Experimental results demonstrate the robust prediction capability of the ERWCA-MLP method.
NEURAL COMPUTING & APPLICATIONS
(2023)
Article
Construction & Building Technology
Jian Liu, Tiange Ge, Yuedong Wu, Rui Chen
Summary: In foam concrete, the water-to-cement ratio (R-wc) affects compressive strength and the sand-to-cement ratio (R-sc) influences this relationship. When R-wc is between 0.5-1.0, compressive strength increases with R-wc. However, when R-wc is larger than 1, the enhanced effect from decreasing small holes almost offsets the weakening effect on strength. Cement can be replaced by sand in the increase stage.
Article
Construction & Building Technology
Ahmed M. Tahwia, Mohamed A. Hamido, Walid E. Elemam
Summary: This study examines the impact of using alternative filler materials as a cement replacement in ultra-high performance concrete (UHPC) on its mechanical characteristics and durability. The results show that using quartz powder (QP), limestone powder (LP), basalt powder (BP), and granite powder (GP) as a partial replacement for cement can improve UHPC's sustainability and reduce its environmental impact. These alternative materials, along with silica fume (SF), result in UHPC with low environmental impact, high compressive strength, and improved durability.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
M. H. Lai, K. J. Wu, X. Cheng, J. C. M. Ho, J. P. Wu, J. H. Chen, A. J. Zhang
Summary: This paper investigates the effects of silica fume (SF) and fly ash (FA) on the properties of heavy-weight concrete. The results demonstrate that SF can improve the passing ability and wet packing density (WPD) simultaneously, while FA can improve the passing ability but not necessarily the WPD. The passing ability of heavy-weight concrete is positively correlated to its WPD.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Badr Aouan, Saliha Alehyen, Mouhcine Fadil, Marouane El Alouani, Hamid Saufi, M'hamed Taibi
Summary: This study focuses on the development of a geopolymer paste with optimized mechanical properties using mixture design. The study investigates the synthesis factors, such as kaolin, metakaolin, and fly ash, and analyzes the structural and microstructural properties of the materials. The results show that the optimized geopolymer paste, with a mixture of 75% fly ash and 25% metakaolin, has excellent mechanical properties and a non-porous structure. The practical application of this study includes the development of efficient geopolymer pastes for construction and civil engineering applications.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Laid Karboua, Melik Bekhiti, Rebih Zaitri
Summary: This research aims to predict the mechanical properties of clayey soil using mix design approach. The study found a good correlation between bentonite, polyvinyl chloride (PVC), cement and the mechanical responses. The results showed that PVC waste can be utilized to improve the mechanical behavior of clay soils and assess the values of maximum dry density, cohesion, and compressive strength of mixtures not made in the laboratory.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Construction & Building Technology
Min Zhou, Zemei Wu, Xue Ouyang, Xiang Hu, Caijun Shi
Summary: A highly efficient mixture design for concrete should balance workability, strength, durability, economic efficiency, and sustainability. Ultra-high-performance concrete (UHPC) requires a thoughtful approach that integrates different design methods to meet specific requirements efficiently.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Levent Koroglu, Derya Over Kaman, Erhan Ayas
Summary: The study found that heat-treated boron derivative wastes used as replacements for Portland cement significantly affected the strength of mortars due to their particle size distribution. Smaller particle sizes decreased the strength of mortars, while larger particle sizes reduced the strength significantly.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Shuaiyu Zhao, Dongpo Zhang, Yaqiang Li, Hang Gao, Xinmiao Meng
Summary: The study focused on the use of magnesium ammonium phosphate cement (MPC) to prepare porous ecological concrete in order to reduce the environmental impacts of construction with ordinary Portland cement (OPC). The pH value, compressive strength, pore structure, chemical composition, morphology, and planting characteristics of the MPC-based concrete were analyzed.
Article
Construction & Building Technology
Baoying Yu, Jianwei Zhou, Baojun Cheng, Wen Yang
Summary: The study found that the hardened MPC stone is a ceramic-like structure, which will be disrupted when aggregate is added, resulting in a weak interface transition zone, but still maintaining a high compressive strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)