scholarly journals INFLUENCE OF TITANIUM OXIDE IN CLINKER ON THE MINERAL COMPOSITION AND THE COMPRESSIVE STRENGTH OF CEMENT

2009 ◽  
Vol 63 (1) ◽  
pp. 114-119
Author(s):  
Takashi CHABAYASHI ◽  
Akinori NAKAMURA ◽  
Hiroyoshi KATO ◽  
Michihito NAKATANI
Keyword(s):  
Compressive Strength ◽  
Titanium Oxide ◽  
Mineral Composition

scholarly journals INFLUENCE OF TITANIUM OXIDE AND MANGANESE OXIDE ON THE MINERAL COMPOSITION AND THE PROPERTIES OF CEMENT

2013 ◽  
Vol 67 (1) ◽  
pp. 31-37
Author(s):  
Takashi CHABAYASHI ◽  
Akinori NAKAMURA ◽  
Hiroyoshi KATO ◽  
Kaori SADA
Keyword(s):  
Manganese Oxide ◽  
Titanium Oxide ◽  
Mineral Composition

scholarly journals The Effect of Soil Mineral Composition on the Compressive Strength of Cement Stabilized Rammed Earth

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 324 ◽  
Author(s):  
Piotr Narloch ◽  
Piotr Woyciechowski ◽  
Jakub Kotowski ◽  
Ireneusz Gawriuczenkow ◽  
Emilia Wójcik
Keyword(s):  
Compressive Strength ◽  
Mineral Composition ◽  
Cement Content ◽  
Rammed Earth ◽  
Compression Tests ◽  
Soil Mineral ◽  
Sem Images ◽  
Mineral Compositions ◽  
Strength Result ◽  
Distribution Water

Cemented stabilized rammed earth (CSRE) is a building material used to build load bearing walls from locally available soil. The article analyzes the influence of soil mineral composition on CSRE compressive strength. Compression tests of CSRE samples of various mineral compositions, but the same particle size distribution, water content, and cement content were conducted. Based on the compression strength results and analyzed SEM images, it was observed that even small changes in the mineral composition significantly affected the CSRE compressive strength. From the comparison of CSRE compressive strength result sets, one can draw general qualitative conclusions that montmorillonite lowered the compressive strength the most; beidellite also lowered it, but to a lesser extent. Kaolinite lightly increased the compressive strength.

scholarly journals INFLUENCE OF TITANIUM OXIDE AND DIPHOSPHORUS PENTAOXIDE ON THE MINERAL COMPOSITION AND THE STRENGTH DEVELOPMENT OF CEMENT

2010 ◽  
Vol 64 (1) ◽  
pp. 60-65
Author(s):  
Takashi CHABAYASHI ◽  
Akinori NAKAMURA ◽  
Hiroyoshi KATO ◽  
Kaori SADA
Keyword(s):  
Titanium Oxide ◽  
Mineral Composition ◽  
Strength Development

scholarly journals INFLUENCE OF TITANIUM OXIDE AND MAGNESIUM OXIDE ON THE MINERAL COMPOSITION AND THE PROPERTIES OF CEMENT

2012 ◽  
Vol 66 (1) ◽  
pp. 211-216
Author(s):  
Takashi CHABAYASHI ◽  
Akinori NAKAMURA ◽  
Hiroyoshi KATO ◽  
Kaori SADA
Keyword(s):  
Titanium Oxide ◽  
Magnesium Oxide ◽  
Mineral Composition

scholarly journals Groundmass Chromospinellides from Kimberlites of Khompu-May Kimberlite Field

2021 ◽  
Vol 906 (1) ◽  
pp. 012108
Author(s):  
Nikolay Oparin ◽  
Oleg Oleynikov
Keyword(s):  
Aluminum Oxide ◽  
Titanium Oxide ◽  
Mineral Composition ◽  
Structural Characteristics ◽  
Titanium Content ◽  
Current Paper ◽  
Oxide Content ◽  
Chromium Spinel ◽  
Two Stages ◽  
Kimberlite Field

Abstract The current paper presents the results of studying chromites of kimberlite mesostasis forming the Manchary, Aprelskaya, Erel, Turakhskaya, and Artemova pipes within the Khompu-May kimberlite field (central Yakutia). Despite shared texture and structural characteristics and mineral composition of the kimberlites, chromospinellide composition is distinctive in each pipe. Groundmass chromium spinel of the Aprelskaya and Erel kimberlite pipes is characterized by the highest aluminum oxide content (>10 wt. %). Chromites from the Erel and Turakhskaya pipes as well as a fraction of grains from the Manchary pipe with titanium oxide (<4 wt. %) form a field of common composition by Cr2O3 and TiO2 content. The Aprelskaya and Artemova pipes show up to 17 wt. % TiO2 in chromites. Such a difference in titanium content correlates with perovskite content in kimberlite groundmass of the Khompu-May field. The results of the study revealed two trends in evolution of chromospinellide microcrystals (R. Mitchell, 1986) – ulvöspinel associated with typical kimberlites and titanomagnetite characteristic of micaceous kimberlites. Chromospinellides of the Aprelskaya pipe demonstrate the ulvöspinel trend only, suggesting earlier spinel crystallization relative to groundmass mica. Spinellides from the Erel and Artemova pipes follow the titanomagnetite trend only, being crystallized after formation of mesostasis mica. Spinellides from the Manchary and Turakhskaya pipes meet the ulvöspinel and titanomagnetite trend, indicating two stages of mineral crystallization relative to phlogopite.

scholarly journals Significance of Rock Mineral Composition On Rock Mechanical Properties And Brittleness Evaluation of Roof And Floor of Broken Soft Coal Seam

2021 ◽  
Author(s):  
Guangqing Hu ◽  
Wenxu Liang ◽  
Qingting Shan ◽  
Meng Zhao ◽  
Xianzeng Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Coal Seam ◽  
Clay Minerals ◽  
Mineral Composition ◽  
Evaluation Method ◽  
Coalbed Gas ◽  
Soft Coal ◽  
Soft Coal Seam

Abstract Fracture of coal structure and low permeability were the main reasons for the “difficult to released gas” in broken soft coal seam. Exploration of horizontal well coalbed gas technology of roof and floor of broken soft coal seam provided a new technical way for coalbed gas development in broken soft coal seam. In this paper, taking Xinxie -1 drilling as an example, the evaluation method of fractured reservoirs in roof and floor of broken soft coal seam was improved. By systematic studied on mineralogy, petrology and engineering mechanics characteristics of top and bottom plates in broken soft coal seam, the influence of rock mineral composition on the rock mechanics properties of the roof and floor of coal seam was explored. In addition, By used correlation analysis and grey relational analysis, a brittle evaluation method of coal seam top and bottom plates based on mineral composition was established. The research results showed that: ①The main components of rock minerals in the top and bottom plates of broken soft coal seam were quartz and clay minerals, followed by plagioclase, siderite and pyrite. The main types of rock cementation were quartz enlargement and siderite cementation, and the pore damage caused by cementation was much greater than that of compaction; ②With the increased of rock particle size, compressive strength (CS) and elastic modulus (E) showed a gradual increase trend, Poisson's ratio (μ) showed a gradual decrease trend, other rock mechanical parameters had no obvious changes. The difference of mineral composition and cementation type was the key factor cause abnormal mechanical properties of rocks; ③Compared with clay minerals, the change of brittle mineral content such as quartz, plagioclase and siderite in rocks were sensitive to the mechanical properties of rocks. The sensitive minerals of compressive strength, shear strength, elastic modulus and softening coefficient were quartz, the sensitive minerals of compressive strength were plagioclase and siderite, and the sensitive minerals of Poisson's ratio are quartz and clay; ④The calculation results of the established mineral weight analysis method were more realistic. It could be concluded that the roof of 13-1 coal, 11-2 coal, 9-2 coal and 4-2 coal seams were more inclined to form fracture network during fracturing, which had guiding significance for the optimization of fracturing horizon.

scholarly journals Mechanical Performance and Durability Evaluation of Sandstone Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Fayong Yang ◽  
Haibin Li ◽  
Guijuan Zhao ◽  
Ping Guo ◽  
Wenbo Li
Keyword(s):  
Compressive Strength ◽  
Crack Resistance ◽  
Mineral Composition ◽  
Frost Resistance ◽  
Mechanical Performance ◽  
Low Cost ◽  
Mass Loss Rate ◽  
Raw Material ◽  
Inspection Time ◽  
Cement Stabilized Base

Enlarging local raw material utilization and reducing project costs is a new trend in the construction field. Under this background, sandstone was utilized in a cement-stabilized base in this study. The mineral composition of sandstone and the proportion of each mineral composition in the parent rock were analyzed using X-ray diffraction. To verify its feasibility, sandstone, syenite, marble, and basalt aggregates were selected to test the mechanical properties and road performance of the four aggregate concretes at 7, 28, 90, and 180 days. The test results showed that although the sandstone slump was the lowest at 60, the workability met the requirement. Compressive strength, tensile elasticity modulus, and axial tensile strength of concrete increased with age in all the concrete specimens, and the strength at each inspection time of sandstone was equivalent to that of marble, lower than that of basalt but higher than that of syenite. The early compressive strength of sandstone concrete is slightly lower than the compressive strength of marble concrete, and the 7 d and 28 d strengths were lower than 14% and 11%, respectively, but their 90 d and 180 d compressive strengths were the same. The crack resistance and frost resistance of sandstone were slightly inferior to those of syenite but better than those of basalt and marble. After 300 freeze-thaw cycles of the four aggregate concretes, the mass-loss rate of the test specimens was less than 5%, indicating that the frost resistance can meet the requirements. The various technical indexes of sandstone mixture could meet the current industry standards, and crack resistance, frost resistance, and fatigue resistance were good, which verified the feasibility of using sandstone for cement-stabilized base and provided a low-cost alternative for road construction.

scholarly journals Decreasing of Leaching and Improvement of Geopolymer Properties by Addition of Aluminum Calcium Cements and Titanium Oxide

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 495 ◽  
Author(s):  
Michał Łach ◽  
Kinga Korniejenko ◽  
Janusz Walter ◽  
Anna Stefańska ◽  
Janusz Mikuła
Keyword(s):  
Compressive Strength ◽  
Titanium Oxide ◽  
Aquatic Environment ◽  
Lower Risk ◽  
Strength Tests ◽  
Naoh Solution ◽  
Aluminum Calcium

The article presents the latest results of the leaching of alkali from geopolymers depending on the introduced additions in the form of aluminum calcium cement and nanometric titanium oxide. Aluminum calcium cements were introduced in two variants: G40 (>40% Al2O3) and G70 (>70% Al2O3) in amounts of 0%, 2%, and 4% by weight. Titanium oxide was also incorporated in amounts of 2% and 4% by weight. The results of conductivity tests of solutions in which geopolymers were immersed were carried out. On this basis, it was found that geopolymers cured in the aquatic environment have a lower risk of efflorescence in the later periods of their use due to leaching of compounds at the stage of aquatic curing. In addition, it was found that the addition of calcium aluminum cements decreases the leaching of substances from geopolymers. It was also found that geopolymers based on an 8 M NaOH solution have greater leaching than when using a 10 M solution. The results of the compressive strength tests for the tested samples were also presented.

Adverse Engineering Properties of Banxi Group Slatealong Changsha Metro Line 2

2012 ◽  
Vol 204-208 ◽  
pp. 1401-1404
Author(s):  
Chen An
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Rock Mass ◽  
Clay Minerals ◽  
Mineral Composition ◽  
Physical And Mechanical Properties ◽  
Engineering Properties ◽  
Test Results ◽  
Softening Coefficient ◽  
Comprehensive Study

For comprehensive study the adverse engineering properties of Banxi Group slate along Changsha Metro Line 2, slate samples were tested and analyzed to research their mineral composition, physical and mechanical properties, weathered properties and disintegration. Test results show that sandy slate and argillite interbedded with each other, the main minerals of slate are quartz and clay minerals, the oxide are SiO2、Al2O3, the natural compressive strength of sandy slate is five to eight times that of argillite, its softening coefficient is less than 0.75, slate is easy to soften, argillite is easy to disintegration and the disintegration of sandy slate is medium grade. The adverse engineering characteristics lead to slate rock mass uneven with hard-soft. Differential weather of slate causes there are some bedrock weathered slots along Changsha Metro Line 2. So during construction, appropriate process and tool must be selected, control the tunnel oriented, strengthen the protection and shorten the bare time of rock mass.

scholarly journals INFLUENCE OF TITANIUM OXIDE ON THE MINERAL COMPOSITION AND THE PROPERTIES OF CEMENT

2011 ◽  
Vol 65 (1) ◽  
pp. 203-208
Author(s):  
Takashi CHABAYASHI ◽  
Akinori NAKAMURA ◽  
Hiroyoshi KATO ◽  
Kaori SADA
Keyword(s):  
Titanium Oxide ◽  
Mineral Composition
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