Article
Construction & Building Technology
Tao Li, Gang Chen, Jianming Yang, Linlin Chong, Xiamin Hu
Summary: This study investigated the effects of different curing conditions on the hydration performance and mechanical properties of magnesium potassium phosphate cement (MKPC). The results showed that early moist air curing and low-temperature water-bath curing improved the compressive strength and volume stability of the MKPC paste. However, water immersion and high-temperature water-bath curing had detrimental effects. Microstructural analysis indicated the instability and partial dissolution of K-struvite in water, with the formation of new precipitates. Early moist air curing and low-temperature elevating curing resulted in faster strength development and good volume stability for the MKPC paste, but further increase in humidity and curing temperature led to porous structures and negative effects on dimensional stability and strength.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Xiaobing Dai, Wenxiao Ren, Jihui Qin, Xingwen Jia, Jueshi Qian
Summary: This study investigated the impact of borax content on the physic-mechanical properties and microstructure of MKPC at high temperatures. Borax influenced the performance of MKPC by altering the phase composition and structure at elevated temperatures. At around 800 degrees C, borax could react with magnesia to form Mg3B2O6. The porosity of MKPC decreased at temperatures higher than 900 degrees C due to the melting of Mg3B2O6. With an increase in borax content from 3% to 15%, MKPC exhibited a denser structure and higher strength at 1100 degrees C. Excellent dimensional stability of MKPC at high temperatures can be achieved with a low borax content.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yijie Zhang, Jing Wang, Liping Li, Chuanyi Ma, Dongshuai Hou, Kai Wang, Shugang Wang
Summary: This study investigated the feasibility of using phosphate cement to plug water gushing in karst pipelines, finding that quick setting and hardening can be achieved under high water-cement ratio conditions using light burned magnesia. It was also observed that the molar ratio of MgO to KH2PO4 plays a significant role in the performance of the slurry.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Bo Pang, Runqing Liu, Yunpeng Cui
Summary: In this study, the early solidifying behaviors of chemically bonded phosphate ceramics (CBPC) solidifying Pb2+ were systematically studied. The results showed that Pb2+ delayed the reaction of CBPC, resulting in changes in hydration heat release and microstructure. The solidified product was Pb3(PO4)2 with low solubility.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Shanliang Ma, Zengqi Zhang, Xiaoming Liu, Yantian Li, Qingsen Zeng, Wei Zhang
Summary: This study proposes a new method of reusing red mud as a mineral admixture in magnesium potassium phosphate cement (MKPC), which improves its performance and reduces preparation cost. The addition of red mud increases the fluidity and prolongs the setting time of MKPC paste, and also enhances the microstructure of MKPC through physical filling effects and chemical effects.
JOURNAL OF BUILDING ENGINEERING
(2022)
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)
Article
Engineering, Environmental
Xihuai Huang, Hao Wu, Duyou Lu
Summary: A novel chemically bonded ceramic (novel-CBC) was prepared using an acid-base reaction of alkali metals in steel slag (SS) and oxalate anion in potassium hydrogen oxalate (PO). The optimal formula with a SS/PO ratio of 3.0 and a W/S ratio of 0.20 exhibited setting within 10 minutes and compressive strengths of 18.0, 25.0, 39.8 and 49.0 MPa at 1, 3, 7 and 28 days. The main reaction products were calcium oxalate monohydrate crystals and agglomerates composed of various elements.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Construction & Building Technology
Yanjiao Zhu, Zhen Wang, Zhifeng Li, Haibin Yu
Summary: By partially replacing magnesium oxide (MgO) with gold mine tailings (GT) in cement, the paper found improved workability and compressive strength, along with a denser microstructure. Incorporating GT in the cement structure leads to the formation of new types of hydrates, enhancing compressive strength. Partial replacement of M reduces costs and enhances the mechanical properties of MKPC.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Miaomiao Wang, Qing Liu, Xiaoxu Liang, Jianyu Xu, Zongjin Li, Rui Liang, Guoxing Sun
Summary: This paper investigates the effect of metakaolin on the performance of high water-to-solid ratio magnesium potassium phosphate cement (MKPC). The presence of metakaolin improves the compressive strength of MKPC and reduces chloride diffusion, but decreases the fluidity of MKPC slurry.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Materials Science, Ceramics
Mazen Alshaaer
Summary: The microstructure of a wollastonite chemically bonded phosphate ceramic (WCPC) includes brushite, wollastonite, and an amorphous phase, with the transformation of brushite and amorphous matrix to a more stable CaP phase taking place over time. The mechanical performance of the ceramic improves with thermal aging, leading to denser, more stable phases and increased stiffness. However, the primary disadvantage of using this material in construction is its relatively high shrinkage due to chemical and physical factors.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Construction & Building Technology
Biwan Xu, Barbara Lothenbach, Zongjin Li
Summary: The effects of seawater on properties and hydrates of MKP cement are complex, including prolonging setting time, slowing down heat release, increasing compressive strength, but decreasing water resistance. The main hydrate formed in seawater is K-struvite, with additional minor components present.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Chemistry, Physical
Kuisheng Liu, Shanliang Ma, Zengqi Zhang, Fanghui Han
Summary: This study focuses on the contributions of granulated blast-furnace slag with various finenesses to the performance development of magnesium potassium phosphate cement (MKPC). It was found that the addition of slag could increase the setting time and decrease the fluidity of MKPC mortar. The physical contributions of slag to the early performance of MKPC mortar are substantial, while the chemical contributions are relatively small.
Article
Engineering, Biomedical
Fupo He, Xinyuan Yuan, Wenhao Fu, Wenhao Huang, Tengyun Chen, Songheng Feng, Huaiyu Wang, Jiandong Ye
Summary: In this study, lithium-containing magnesium phosphate-based ceramics were prepared at a low sintering temperature using lithium/magnesium-containing phosphate glasses as additives. The ceramics showed nano-size grains and abundant micropores, and the addition of phosphate glasses significantly increased their porosity and compressive strength. The sustained release of Mg, P, and Li ions from the ceramics created a Mg-rich ionic microenvironment, which improved cellular proliferation, osteogenic differentiation, and proangiogenic capacities. The ceramics with high compressive strength, osteostimulation, and proangiogenic effects are expected to efficiently regenerate bone defects.
BIOMEDICAL MATERIALS
(2023)
Article
Construction & Building Technology
Biwan Xu, Frank Winnefeld, Bin Ma, Daniel Rentsch, Barbara Lothenbach
Summary: Aluminum sulfate has a positive effect on preventing efflorescence of magnesium potassium phosphate cements by modifying the cement properties and hydration process.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Baki Aykut Bilginer, Sinan T. Erdogan
Summary: The study found that factors like magnesium-to-phosphate ratio and water-to-binder ratio have significant effects on setting time and early strength of MKPC pastes, while the addition of borax, fly ash, and sand does not significantly alter the mineralogy of hydrated pastes.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Biomaterials
Mohammadreza Kasravi, Alireza Yaghoobi, Tahereh Tayebi, Mahsa Hojabri, Abdolkarim Talebi Taheri, Fatemeh Shirzad, Bahram Jambar Nooshin, Radman Mazloomnejad, Armin Ahmadi, Fatemeh A. Tehrani, Ghasem Yazdanpanah, Mohammad Hadi Farjoo, Hassan Niknejad
Summary: As a promising approach in translational medicine, the decellularization of discarded livers to produce bioscaffolds that support recellularization has potential in overcoming the limitations of conventional liver transplantation. In this study, the researchers investigated the use of matrix metalloproteinase (MMP) inhibition to preserve the extracellular matrix (ECM) during liver decellularization. The results demonstrated that the application of an MMP inhibitor significantly improved the preservation of ECM components and mechanical properties of the bioscaffolds, which supported cell viability and function in vitro. The study also confirmed that the MMP inhibition led to the inhibition of MMP2 and MMP9, providing a novel method to enhance ECM preservation during liver decellularization.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Mohammadsadegh Nadimifar, Weiguang Jin, Clara Coll-Satue, Gizem Bor, Paul Joseph Kempen, Ali Akbar Moosavi-Movahedi, Leticia Hosta-Rigau
Summary: This study presents a metal-phenolic self-assembly approach that can prepare nanoparticles fully made of hemoglobin. The nanoparticles exhibit good oxygen binding and releasing capabilities.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jyoti Kumari, Roel Hammink, Jochem Baaij, Frank A. D. T. G. Wagener, Paul H. J. Kouwer
Summary: Fibrosis is the formation of fibrous connective tissue in response to injury, leading to organ dysfunction. A novel hybrid hydrogel combining synthetic polyisocyanide with hyaluronic acid has been developed, showing strong antifibrotic properties.
BIOMATERIALS ADVANCES
(2024)
Letter
Materials Science, Biomaterials
Melissa Machado Rodrigues, Cristian Padilha Fontoura, Charlene Silvestrin Celi Garcia, Sandro Tomaz Martins, Joao Antonio Pegas Henriques, Carlos Alejandro Figueroa, Mariana Roesch Ely, Cesar Aguzzoli
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jessica Polak, David Sachs, Nino Scherrer, Adrian Suess, Huan Liu, Mitchell Levesque, Sabine Werner, Edoardo Mazza, Gaetana Restivo, Mirko Meboldt, Costanza Giampietro
Summary: Human skin equivalents (HSEs) play a crucial role in tissue engineering. This study introduces a 3D-printed culture insert to apply a static radial constraint on HSEs and examines its effects on tissue characteristics. The results show that the diameter of the culture insert significantly influences tissue contraction, fibroblast and matrix organization, keratinocyte differentiation, epidermal stratification, and basement membrane formation. This study provides important insights for the design of skin tissue engineering.
BIOMATERIALS ADVANCES
(2024)
Review
Materials Science, Biomaterials
Shiliang Chen, Tianming Du, Hanbing Zhang, Jing Qi, Yanping Zhang, Yongliang Mu, Aike Qiao
Summary: This paper reviewed the primary methods for improving the overall properties of biodegradable zinc stents. It discussed the mechanical properties, degradation behavior, and biocompatibility of various improvement strategies. Alloying was found to be the most common, simple, and effective method for improving mechanical properties. Deformation processing and surface modification further improved the mechanical properties and biological activity of zinc alloys. Meanwhile, structural design could endow stents with special properties. Manufacturing zinc alloys with excellent properties and exploring their interaction mechanism with the human body are areas for future research.
BIOMATERIALS ADVANCES
(2024)
