Article
Construction & Building Technology
Anjaneya Dixit, Hongjian Du, Juntao Dang, Sze Dai Pang
Summary: Adding fly ash (FA) to limestone-calcined clay (LC) blends improves the rheology of the concrete, with the LCF concrete demonstrating better performance in both early-age and later-age characteristics.
CEMENT & CONCRETE COMPOSITES
(2021)
Review
Construction & Building Technology
Xu-Jing Niu, Qing-Bin Li, Yu Hu, Yao-Sheng Tan, Chun-Feng Liu
Summary: Nano-clay and calcined nano-clay are new types of nano-materials with high pozzolanic activity, which can improve the properties of cement-based materials. Studies have shown that their mechanism of action mainly includes filling effect, pozzolanic effect, nucleation effect, bridging effect, and barrier effect.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Lei Wang, Zhou Zhu, Ameer Hamza Ahmed, Marco Liebscher, Xiaohong Zhu, Viktor Mechtcherine
Summary: Self-healing is a crucial characteristic of cement-based composites, which affects the safety and durability of construction materials. This study investigated the self-healing behavior of ordinary Portland cement (Ref) and Limestone Calcined Clay Cement (LC3) high-strength, strain-hardening cement-based composites (HS-SHCC) under different exposure conditions. The experimental results showed that wet-dry cycles facilitated crack healing in both Ref and LC3 HS-SHCC, but the healing was not strong enough to prevent re-cracking during re-loading. Ref composites displayed improved flexural strength after wet-dry cycles, while LC3 composites showed desirable self-healing performance after freeze-thaw cycles.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Nsesheye S. Msinjili, Nico Vogler, Patrick Sturm, Markus Neubert, Hans-Jurgen Schroeder, Hans-Carsten Kuehne, Klaus-Jurgen Huenger, Gregor J. G. Gluth
Summary: Calcined brick clays have been understudied compared to other calcined clays in terms of CO2 emission reduction potential. However, blended cement mortars made with mixed brick clays and Portland cement show promise in terms of improved chloride penetration resistance and potentially sustainable use.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
R. Shamseldeen Fakhri, E. Thanon Dawood
Summary: Cement is widely used in construction, but the accumulation of waste has impacted cities' appearance. To reduce waste and greenhouse gas emissions, it is necessary to use industrial waste by-products to replace cement. This study aims to design green concrete with different cement contents that satisfy structural application requirements and eliminate negative environmental impacts. The results show that adding limestone powder, calcined clay, and steel slag as partial cement replacements can decrease slump properties of fresh concrete, requiring an increased dosage of superplasticizer. Green concrete with certain cement replacement percentages showed higher strength values compared to normal concrete. The evaluated reduction of carbon dioxide emissions study indicated that green concrete can significantly decrease CO2 emissions.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Run-Sheng Lin, Seokhoon Oh, Wei Du, Xiao-Yong Wang
Summary: Adding nano silica can significantly enhance the compressive strength, accelerate hydration reaction, refine microstructure, and improve durability and carbonation resistance of LC3 cement mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Divino Gabriel Lima Pinheiro, Matheus Ian Castro Sousa, Fernando Pelisser, Joao Henrique da Silva Rego, Amparo Moragues Terrades, Moises Frias Rojas
Summary: This article evaluates a ternary cement with 23% calcined clay and 2% nanosilica to replace 25% of Ordinary Portland Cement. Tests show that the ternary cement has a high surface area, accelerates silicate formation, and reduces hydration products. Additionally, a significant reduction in total porosity and the conversion of macropores into mesopores and gel pores were observed.
Article
Engineering, Multidisciplinary
Yingwu Zhou, Guoqiang Gong, Bin Xi, Menghuan Guo, Feng Xing, Cheng Chen
Summary: This study proposes the use of LC3 and FAC to produce sustainable lightweight ECC, investigating the effect of LC3 weight fraction on its properties and microstructure. Replacing OPC with LC3 slightly decreased compressive and tensile strength, but increased ductility. The high reactivity of LC3 decreased porosity and pore size.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Construction & Building Technology
Sumaiya Afroz, Yingda Zhang, Quang Dieu Nguyen, Taehwan Kim, Arnaud Castel
Summary: This study examines the shrinkage properties of two sustainable aluminosilicate blends, namely fly ash and limestone-calcined clay (LC3). Paste and concrete samples were tested to determine the maximum replacement of binder while maintaining strength. The study analyzed the chemical and autogenous shrinkage of paste samples, and further investigated hydration using thermogravimetric analysis and Fourier transform infrared spectroscopy. By comparing different types of shrinkage, such as autogenous, drying, and total shrinkage, for concrete with specific compressive strength, the study found that LC3 exhibited higher autogenous shrinkage due to faster hydration compared to fly ash. Despite this, LC3 had lower drying shrinkage, making it a more sustainable and eco-friendly alternative to fly ash concrete when considering cement replacement levels, shrinkage, and ecological impact.
MATERIALS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Wu-Jian Long, Can Lin, Jie-Lin Tao, Tao-Hua Ye, Yuan Fang
Summary: A modified limestone calcined clay cement composite for 3D printing is developed by introducing silica fume and particle packing theory, which significantly improves dynamic yield stress, static yield stress, and structural recovery. The embodied energy and embodied carbon emissions per cubic meter are greatly reduced, contributing to the development of eco-efficient printable materials.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Obinna Onuaguluchi, Nemkumar Banthia
Summary: This study investigated the effect of Nano-Fibrillated Cellulose (NFC) on the sulfate resistance of cement composites. The results showed that the cement composites prepared with 0.1% NFC exhibited superior sulfate attack resistance and helped mitigate crack propagation in cement pastes. Microstructural analysis confirmed the modification effect of NFC on the cement matrices.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Construction & Building Technology
Ran Li, Lei Lei, Tongbo Sui, Johann Plank
Summary: This study found that using calcined clay in composite cements significantly increases water demand, while PCE superplasticizers have a significant impact on flow properties. The research suggests that commercially available PCE products can effectively improve the flow performance of OPC/CC blended cements.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Chemistry, Physical
Yongjie Bian, Yongbo Huang, Fuxin Li, Dong Dong, Honggen Zhao, Piqi Zhao, Lingchao Lu
Summary: By studying the preparation, hydration, and properties of PVA-modified CSA cement repair mortar, as well as the mechanism by which PVA improves bonding strength, it was found that PVA can prolong setting time, reduce mechanical strength initially, and enhance bonding strength in later stages.
Article
Construction & Building Technology
Wenhua Chen, Juntao Dang, Hongjian Du
Summary: This paper reports the use of waste clay to produce low-carbon and lightweight cement composites. The research found that the clay reacts with cement hydration products, resulting in pore refinement and lower density of the concrete. Partial cement replacement improves the strength and ductility of the concrete, but excessive replacement leads to reduced strength. Additionally, replacing cement with clay significantly reduces carbon emissions.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Physical
Viviana L. Bonavetti, Cristina C. Castellano, Edgardo F. Irassar
Summary: Common raw clays can be transformed into sustainable general use cement through thermal treatment. Adding calcined illite clay and limestone filler as partial replacements improves the performance of the cement. By adjusting the content of limestone filler and illite clay, the strength and hydration rate of the cement can be modified.
APPLIED CLAY SCIENCE
(2022)
