Ground granulated blast furnace slag-modified magnesium phosphate cement used as grouting material: Workability, mechanical property and corrosion resistance optimization ... Ltd, China, having a medium diameter of 16.51 μm and a specific surface area of 461.6 m 2 /kg, with a purity of 90.71 %. The fly ash was sourced from Kunshan Jinguli ...
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The results show that the mixed slurry with a magnesium phosphate ratio of 1/3, a magnesium–boron ratio between 5% and 10%, and a water–cement ratio of 0.2–0.5 has better stability and mobility.
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Optimization of magnesium phosphate cement prepared by natural brucite using ultrafine metakaolin and metakaolin. Author links open overlay panel Shiru Long, Yue Li, Nan Wang, Hui Lin, Zigeng Wang. ... including prominent locations such as China, the United States, and Russia. It is a lamellar mineral with the highest magnesium content ...
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Research Status and Development Trend of Magnesium Phosphate Cement [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2017, 36 (4): 1245-1253. …
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Magnesium phosphate cement matrix is generally manufactured by combining the magnesium oxide and potassium dihydrogen phosphate [13,14]. This kind of cement ... China is used for making the magnesium phosphate cement (MPC). The purity and density of potassium dihydrogen phosphate are 98.5% and 2.238 g/cm3, respectively. Another power material ...
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Generally classified as magnesium-based cement, this material was used in historic times, dating back to ancient times in Europe, India, and China, among other countries. The Great Wall of China and many of the stupas in India, still standing today, were all …
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Construction of macroporous magnesium phosphate-based bone cement with sustained drug release. Author links open overlay panel Yanan Zhao a, Suchun Yu a, Xiaopei Wu a, Honglian Dai a b, Wenbin Liu c, Rong Tu a, Takashi Goto a d. ... China), the surface morphology of the composites was analysed by scanning electron microscopy (SEM; S ...
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The effects of nano-SiO 2 and hydroxypropyl methyl cellulose (HPMC) on the physical and mechanical properties of magnesium phosphate cement (MPC)-based mortar under salt corrosion environment were studied. The variation of strength under salt corrosion environment was compared and studied. The chloride ion permeability of modified MPC …
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Magnesium phosphate cement (MPC), a new type of inorganic cementitious material, is favored in engineering and construction because of its fast setting speed and high bonding strength, but is limited in practical application due to its high production cost and excessive release of hydration heat. ... Henan Province, China, with a specific ...
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The apparent changes in surfaces of magnesium ammonium phosphate cement (MAPC) and magnesium potassium phosphate cement (MKPC) mortars cured in different conditions at 28 …
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Magnesium phosphate cement (MPC) is produced by the hydration reaction of magnesium oxide and phosphate, which is a new type of cementitious material combined by …
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Magnesium phosphate cement, renowned for its exceptional fire resistance, has been a key area of research in fireproof coatings for steel structures. ... MH is a white powder sourced from Henan Zhengzhou Fengyue Chemical Co., Ltd. in P. R. China, with a median particle size of 9.44 μm. Dead-burned MgO is produced by calcinating magnesite ...
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Previous studies have established the strength development of magnesium ammonium phosphate cement (MAPC) concrete and magnesium potassium phosphate …
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In this study, the ablation and mechanical properties of magnesium phosphate cement (MPC) were enhanced by adding ZrB2. The effects of ZrB2 on the microstructure, …
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Magnesium phosphate cement (MPC), also known as chemically bonded ceramics [1], has gotten widely attention.MPC exhibits many excellent performances, such as rapid strength enhancement [2], higher fluidity [3], excellent volume stability [4] and strong bonding capacity with old substances [5].MPC is composed of 70–85 % MgO, 10–25 % acidic phosphates and small …
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Following GB/T 1346–2011 of China, "Test methods for water requirement of normal consistency, setting time and soundness of the Portland cement" [45], the setting time of magnesium phosphate cement (MPC) was evaluated using a Vickers meter (QX-42, Qinxing Science and Technology Company, China). Given that the initial setting time of MPC is ...
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Magnesium phosphate cement (MPC) shows many special properties, such as rapid hardening [14,15], ... which accords with GB/T 700 and is widely used in engineering in China, was adopted. A commercial inorganic coating was used for comparison. Ordinary Portland cement (OPC) was selected to be another binder compared with MPC.
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Magnesium phosphate cement (MPC) is a new cementing material with great development potential and excellent properties. In addition to traditional cement, MPC also has the characteristics of ...
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Introduction. Magnesium phosphate cement (MPC) is composed of magnesium oxide, phosphate, retarding agent, and mineral admixture in specific proportions (Qiao et al., 2010; Haque and Chen, 2019).After adding water, the raw materials will undergo an acid-base reaction and hydration reaction, and then harden by physical action of coagulation (Sugama and Kukacka, 1983; Liu …
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The use of recycled coarse aggregates (RCAs) in concrete often results in a decrease in mechanical properties due to the poor bonding performance between new and old interfaces. This study impregnated RCA with low-alkali sulfoaluminate (LASAC) and magnesium phosphate cement (MPC) to improve the mechanical properties of RCA, and the axial …
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Magnesium phosphate cement (MPC) is known to have the potential to be an attractive repair material in practice, and has recently evolved as a fast-moving research area for this and other applications. ... Secondly, MgO reserves are limited (most MgO comes from Russia and China), and deposits are distributed heterogeneously (e.g., not many ...
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1 Introduction The production of Portland cement consumes huge amounts of energy and produces billions of tons of solid waste, even contributing 6–8% of the global anthropogenic carbon dioxide emissions. 1–3 Therefore, it is urgent to develop sustainable green building materials that can replace Portland cement. Magnesium phosphate cement (MPC) is …
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1. Introduction. Magnesium phosphate cement (MPC) is widely used as the rapid repair material for airport runways, bridges, piers, highways, and other infrastructures because of its fast hardening, early strength, high bonding strength, and wide adaptability to many environments, which significantly shortens repair times [1,2,3,4].Control of the setting time and fluidity is …
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High permeability and strength magnesium phosphate cement (MPC) with porosity, average pore size, and compressive strength varied from 63.2% to 74%, 138.7 μm to 284.7 μm and 2.3 MPa to 4.7 MPa, respectively, were successfully prepared by combining the physical ing method and chemically entrained gas method at room temperature.The effects of …
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Active artificial bone substitutes are crucial in bone repair and reconstruction. Calcium phosphate bone cement (CPC) is known for its biocompatibility, degradability, and ability to fill various shaped bone defects. However, its low osteoinductive capacity limits bone regeneration applications. Effectively integrating osteoinductive magnesium ions with CPC …
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Magnesium phosphate cement (MPC), as a artificial bone substitutes, has been a potential biomaterial for repairing bone defects, but its clinical application is limited by insufficient mechanical strength and poor osteoinductive activity. ... This research was financially supported by National Natural Science Foundation of China (No. 52171236 ...
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The early strength of magnesium phosphate cement (MPC) decreases sharply in severe cold environments ≤−10 °C, with the 2 h compressive strength falling to 3.5 MPa at−20 °C. ... The setting time of the MPC, which was the initial setting time, was measured using a Vicat apparatus (Chongqing, China). The soundness of the MPC was tested ...
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Magnesium phosphate cement (MPC) is a new type of inorganic cementitious rapid repair material, but it has poor toughness and is easy to crack. According to our previous research, these problems can be ameliorated by adding natural coir fiber (CF) into MPC. ... China), which is calcined at 1700 °C to form the dark yellow re-calcined magnesium ...
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Effects of sulfuric acidity (pH = 2–7) on the properties of magnesium ammonium phosphate cement (MAPC) and magnesium potassium phosphate cement (MKPC) were investigated. ... d 90: 27.85 μm) was purchased from Haicheng city, Liaoning Province, China, and its chemical compositions analyzed by X-ray fluorescence (XRF) were shown in Table 1. …
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2 Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, ... Magnesium-calcium phosphate cement (MCPC) has been reported as a promising candidate for bone repair with promoted osteogenesis both in vitro and in vivo. However, relatively little is known about the effects of MCPC ...
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Magnesium phosphate cement (MPC), as a new type of cementitious material, is difficult to be popularized in practical applications due to its short setting time, high cost, and poor water resistance.
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Magnesium phosphate cement (MPC) as repair materials of the structures or package materials for wastes may be exposed to elevated temperatures during fire attack. ... China). The chemical compositions of the dead burned MgO and CSA were determined by X-ray fluorescence analysis and presented in Table 1. The particle size distributions of dead ...
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The magnesium phosphate cement's hydration products first increased and then decreased with increasing M/P, with the highest values between 2:1 and 3:1. The difference in strength between the two is the different contents of MgO. The matrix interior of MPC consists of K-struvite and unreacted MgO.
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