Effect of calcium aluminate cement on water resistance and high-temperature resistance of magnesium-potassium phosphate cement

2018 ◽  
Vol 175 ◽  
pp. 768-776 ◽  
Author(s):  
Xiao Zhang ◽  
Guoxin Li ◽  
Mengdie Niu ◽  
Zhanping Song
Keyword(s):  
High Temperature ◽  
Calcium Aluminate ◽  
Water Resistance ◽  
Potassium Phosphate ◽  
Calcium Aluminate Cement ◽  
Temperature Resistance ◽  
Magnesium Potassium Phosphate Cement ◽  
High Temperature Resistance ◽  
Aluminate Cement

High temperature properties of MDF composite based on calcium aluminate cement and polyvinyl alcohol

2013 ◽  
Vol 115 (2) ◽  
pp. 1245-1252 ◽  
Author(s):  
František Šoukal ◽  
Petr Ptáček ◽  
Jiří Másilko ◽  
Tomáš Opravil ◽  
Jaromír Havlica ◽  
...  
Keyword(s):  
High Temperature ◽  
Polyvinyl Alcohol ◽  
Calcium Aluminate ◽  
Calcium Aluminate Cement ◽  
High Temperature Properties ◽  
Aluminate Cement

scholarly journals Improvement of Calcium Aluminate Cement Containing Blast Furnace Slag at 50°C and 315°C

2022 ◽  
Vol 8 ◽  
Author(s):  
Wu Zhiqiang ◽  
Liu Hengjie ◽  
Qu Xiong ◽  
Wu Guangai ◽  
Xing Xuesong ◽  
...  
Keyword(s):  
Blast Furnace ◽  
High Temperature ◽  
Low Temperature ◽  
Calcium Aluminate ◽  
Heavy Oil ◽  
Blast Furnace Slag ◽  
Thermal Recovery ◽  
Calcium Aluminate Cement ◽  
Aluminate Cement ◽  
Furnace Slag

During the thermal recovery of heavy oil thermal recovery wells, improving the mechanical properties and integrity of the cement ring is of great significance for the safe and efficient exploitation of heavy oil resources. This paper studies the relative properties of calcium aluminate cement and three kinds of slags under the conditions of 50°C × 1.01 MPa and 315°C × 20.7 MPa. CAC-slag composite material performance was evaluated using the cement paste compressive strength and permeability tests to study the physical properties of CAC with blast furnace slag. X-ray diffraction analysis, scanning electron microscopy (SEM), and thermal analysis (DSC/TG) were carried out to investigate the mineralogical composition of CAC with blast furnace slag. Results show that adding blast furnace slag did not affect the performance of cement slurry. Moreover, C2ASH8 curing occurred at low temperature, the microstructure of CAC paste was compact, and the permeability resistance was improved, thus improving the low-temperature properties of neat CAC. When cured at a high temperature, the CAC paste was mainly hydrated with C3ASH4 and AlO(OH), which had a well-developed crystal structure. Adding blast furnace slag can improve the CAC resistance to high temperature.

scholarly journals Erratum to: High temperature properties of MDF composite based on calcium aluminate cement and polyvinyl alcohol

2016 ◽  
Vol 124 (1) ◽  
pp. 569-569
Author(s):  
František Šoukal ◽  
Petr Ptáček ◽  
Jiří Másilko ◽  
Tomáš Opravil ◽  
Jaromír Havlica ◽  
...  
Keyword(s):  
High Temperature ◽  
Polyvinyl Alcohol ◽  
Calcium Aluminate ◽  
Calcium Aluminate Cement ◽  
High Temperature Properties ◽  
Aluminate Cement

scholarly journals Preparation of Self-leveling Mortar Based on Anhydrite-II Phosphogypsum

2021 ◽  
Vol 2076 (1) ◽  
pp. 012035
Author(s):  
Yu Zhang ◽  
Jiahao Yang ◽  
Yu Liu ◽  
Bin Liu ◽  
Fengqing Zhao
Keyword(s):  
Sulfuric Acid ◽  
Calcium Aluminate ◽  
Water Resistance ◽  
Construction Material ◽  
Setting Time ◽  
Steel Slag ◽  
Calcium Aluminate Cement ◽  
Hydration Rate ◽  
Softening Coefficient ◽  
Aluminate Cement

Abstract The construction material from anhydrite-II phosphogypsum is dense in structure and has good water resistance. But its disadvantages are low hydration activity and long setting time. In this work, anhydrite-II phosphogypsum is modified by adding a composite activator, which is made of sulfuric acid modified steel slag, β-hemihydrate gypsum and calcium aluminate cement. With this, the hydration rate of anhydrite-II phosphogypsum is clearly increased and setting time shortened. The performance of self leveling mortar prepared is as per JC/T 1023-2021, with softening coefficient of 0.8.

scholarly journals Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3855
Author(s):  
Amirmohamad Abolhasani ◽  
Bijan Samali ◽  
Fatemeh Aslani
Keyword(s):  
Temperature Rise ◽  
Calcium Aluminate ◽  
Elevated Temperatures ◽  
Ultrasonic Pulse Velocity ◽  
Pulse Velocity ◽  
Calcium Aluminate Cement ◽  
Cement Concrete ◽  
Sem Images ◽  
Strength Deterioration ◽  
Aluminate Cement

One commonly used cement type for thermal applications is CAC containing 38–40% alumina, although the postheated behavior of this cement subjected to elevated temperature has not been studied yet. Here, through extensive experimentation, the postheated mineralogical and physicochemical features of calcium aluminate cement concrete (CACC) were examined via DTA/TGA, X-ray diffraction (XRD), and scanning electron microscopy (SEM) imaging and the variation in the concrete physical features and the compressive strength deterioration with temperature rise were examined through ultrasonic pulse velocity (UPV) values. In addition, other mechanical features that were addressed were the residual tensile strength and elastic modulus. According to the XRD test results, with the temperature rise, the dehydration of the C3AH6 structure occurred, which, in turn, led to the crystallization of the monocalcium dialuminate (CA2) and alumina (Al2O3) structures. The SEM images indicated specific variations in morphology that corresponded to concrete deterioration due to heat.

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