Article
Construction & Building Technology
Liang Bai, Hui Zheng, Xin Wang, Xingwen Liang, Shuai Hu
Summary: This study investigated the early water stability of Magnesium Potassium Phosphate Cement (MKPC) blended with Calcium Aluminate Cement (CAC) and Wollastonite (WS). The presence of CAC extended the setting time of MKPC macroscopically due to the stimulating effect of the admixture on the composite retarder. The synergistic effect between CAC and WS enhanced the early water stability and compressive strength of MKPC under water curing. Microscopically, CAC participated in the reaction of the MKPC system, producing crystalline and amorphous products, while WS inhibited crack development and strengthened the brittle matrix.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Chinedu A. Ajoku, Anaclet Turatsinze, Ariane Abou-Chakra
Summary: Calcium phosphate cement is a room-temperature hardening inorganic cement with low fracture behavior. By incorporating recycled rubber aggregates and corrosion-resistant fibers into the cement matrix, high-strength composites with improved strain capacities can be produced. The addition of inert inclusions improves the fracture properties of the plain cement.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sami Doner, Jonathan T. T. Villada, Sumanta Das
Summary: This paper evaluates the creep behavior of wollastonite-microfiber-reinforced hardened cement paste through parametric study. The results show significant improvement in compressive strength and creep modulus with the incorporation of 10% wollastonite fibers. The study establishes a cost-effective and efficient route to enhance the creep behavior of hardened cement paste for a wide range of infrastructural applications.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Melaku N. Seifu, Amanuel Bersisa, Ki-Yeon Moon, G. M. Kim, Jin-Sang Cho, Solmoi Park
Summary: This study investigates the effect of reaction and carbonation degrees on the reaction products of calcium silicate cement (CSC) during the hardening process in a high atmospheric CO2 concentration. The results show that stable C-S-H phase can form when the carbonation degree is less than one-third of the reaction degree. At higher carbonation degrees and depleted C-S-H, amorphous aluminosilicate and calcite become the main binding phases.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Materials Science, Ceramics
Zilgma Irbe, Dagnija Loca
Summary: Premixed calcium phosphate cement pastes have been proposed as biomaterials for bone tissue repair and regeneration, with alpha-Tricalcium phosphate (alpha-TCP) based cements setting to form calcium deficient hydroxyapatite. The use of mixture of basic and acidic potassium phosphate salts showed the best overall results in terms of cohesion, pH value, hydrolysis, and compressive strength of the cement.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Paper & Wood
Tianxing Gong, Xiujuan Ji, Xinyu Liu, Jingqiu Zhou, Jingshu Zhang, Yadong Chen, Qiong Wu
Summary: Aging-related abnormal bone metabolism can increase the risk of fractures in older population. Injectable bone cement has been used to augment porous and fragile bones, but its inadequate mechanical properties limit its applications. This study shows that the mechanical properties of the cement can be improved by adding cellulose nanofibers, with silanized CNFs having the strongest reinforcing effect. The resulting nanofiber-reinforced bone cement is biocompatible and has the potential to be a promising bone substitute biomaterial.
Article
Materials Science, Ceramics
Zepeng Cai, Zhiwen Wu, Yi Wan, Tao Yu, Changren Zhou
Summary: The study prepared micronano calcium phosphate (MNC) with different Ca/P ratio and added it to CPC and CSC, showing significant improvements in mechanical properties and setting time of the cement. MNC promoted hydration reaction, affected crystal growth, and reduced porosity in the cement, delaying degradation.
CERAMICS INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Yongxue Yan, Xiaohan Dong, Renshan Li, Yankuan Zhang, Shaokui Yan, Xin Guan, Qingpeng Yang, Longchi Chen, Yunting Fang, Weidong Zhang, Silong Wang
Summary: Enhancing rock weathering through the addition of silicate rock powder to soil has been proposed as an effective method to remove CO2 from the atmosphere. However, the impact of silicate rock powder on the stability of soil organic carbon and its effectiveness in mitigating CO2 emissions is not well understood. This study evaluated the response of soil CO2 efflux to wollastonite addition in different land-use types in a subtropical region of China. The results showed that wollastonite addition significantly increased soil CO2 efflux, with soil properties playing a major role in this response. The findings suggest that the application of wollastonite may lead to increased mineralization of soil organic carbon in acidic soil, potentially weakening the effectiveness of enhanced rock weathering as a CO2 sequestration tool.
Article
Materials Science, Multidisciplinary
Ilayda Duru, Nisa Irem Buyuk, Gamze Torun Kose, Dylan Widder Marques, Karina Ann Bruce, John Robert Martin, Duygu Ege
Summary: In this study, fullerenol (Ful), a water-soluble derivative of C-60 fullerene with antioxidant activity, is incorporated into calcium phosphate cements (CPCs) to enhance their osteogenic ability. The addition of Ful in CPCs results in improved mechanical performance, antioxidant activity, and cellular osteogenesis. The results suggest that Ful-loaded cements can be a promising additive for bone reconstruction procedures.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Biomedical
Paritat Thaitalay, Oranich Thongsri, Rawee Dangviriyakul, Sawitri Srisuwan, Louise Carney, Julie Elizabeth Gough, Sirirat Tubsungnoen Rattanachan
Summary: In this study, three different modified cements were evaluated for their physical properties and the response of primary human osteoblast cells and mesenchymal stem cells. Polyacrylic acid was found to improve the compressive strength and Young's modulus of the cement, but it had negative effects on apatite phase formation, setting time, and degradation. The addition of bioactive glass improved the physical properties of the cement and enhanced cell proliferation and differentiation, making it a promising formula for bone repair applications.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2023)
Article
Biochemistry & Molecular Biology
Claudia Morilla, Elianis Perdomo, Ana Karla Hernandez, Ramcy Regalado, Amisel Almirall, Gaston Fuentes, Yaima Campos Mora, Timo Schomann, Alan Chan, Luis J. Cruz
Summary: The study shows that the addition of sodium alginate allows calcium phosphate cements to set quickly, with high injectability and compression resistance values between 1.6 and 2.6 MPa. The drug release ranges from 12.6% to 13.2% after 7 days, with all antibiotic-containing cements exhibiting antimicrobial activity and cell viability above 70%. The addition of sodium alginate and tetracycline was observed to improve cell viability.
Article
Materials Science, Ceramics
Paritat Thaitalay, Oranich Thongsri, Rawee Dangviriyakul, Sawitri Srisuwan, Chutima Talabnin, Sanong Suksaweang, Nuan La-ong Srakaew, Sirirat Tubsungnoen Rattanachan
Summary: The addition of PAA and Na2HPO4 mixture into biphasic calcium phosphate cement was found to enhance mechanical strength and cell viability while maintaining bioactivity.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Construction & Building Technology
Ting Zhang, Baoguo Ma, Hongbo Tan, Huahui Qi, Tao Shi
Summary: This study found that sodium carbonate and sodium phosphate have different effects on the hydration of cement based on the structure of the precipitates formed, where calcium carbonate precipitate accelerated cement hydration while calcium phosphate precipitate retarded it. The composition and structure of the precipitates were responsible for these effects, with calcium carbonate providing interspace for easier ion dissolution and calcium phosphate forming a more compact layer structure that hindered the transport of water molecules and ions.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Robbie M. Damiani, Paramita Mondal, David A. Lange
Summary: The reuse of waste tires in the form of waste rubber in concrete has been attempted to address environmental concerns, but it results in a drastic decrease in compressive strength. This study investigates the effect of expansive cement on the performance of rubberized cement samples and the interfacial transition zone, showing that the use of expansive cement can decrease the interfacial gap at the rubber-paste interface and improve mechanical performance. The experimental results support the hypothesis that expansive cement enhances the mechanical properties of rubberized concrete samples.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jincheng Yu, Jueshi Qian, Huaxin Chen, Yongan Ji, Dongliang Kuang, Xingwen Jia, Bowen Guan
Summary: This study aims to introduce CSA into MPC to improve its thermal properties at elevated temperatures. It was found that the proper addition of CSA could form new amorphous phases, reduce open porosities, promote sintering progress, and enhance strengths at elevated temperatures. It is recommended to replace 10% and 30% of dead burned MgO with CSA in MPC pastes at exposure temperatures above 1000°C and below 400°C, respectively.
CONSTRUCTION AND BUILDING MATERIALS
(2023)