Research on Properties of Pressed Silicate Materials of Non-autoclave Hardening with the Addition of Synthetic Tobermorite-Like Calcium Hydrosilicates

2021 ◽  
pp. 309-315
Author(s):  
A. A. Volodchenko
Keyword(s):  
Calcium Hydrosilicates ◽  
Silicate Materials

scholarly journals NON-AUTOCLAVE SILICATE COMPOSITES USING NON-TRADITIONAL RAW MATERIALS AND CRYSTAL FILLER

2020 ◽  
pp. 8-17
Author(s):  
A. Volodchenko
Keyword(s):  
Structure Formation ◽  
Raw Materials ◽  
Raw Material ◽  
Formation Processes ◽  
Product Density ◽  
Hardening Process ◽  
Calcium Hydrosilicates ◽  
Synthetic Crystal ◽  
Silicate Materials ◽  
Crystalline Growth

In the construction of buildings and structures, many wall materials are used, including silicate products of various functional purposes. In traditional production technology of such materials, the hardening process occurs due to the formation of a crystal structure in the CaO-SiO2-H2O system. There are various ways to modify the crystalline growth of the cementing substance, one of which is the use of various kinds of crystal seedings, in particular the use of natural and synthetic calcium hydrosilicates. The purpose of the experiments is to study the possibility of improving the performance properties of non-autoclave silicate composites by modifying the structure formation in the "lime-non-traditional aluminosilicate raw materials" system, which consists in the crystal-chemical regulation of the structure formation processes with a synthetic crystal filler CaO-SiO2-H2O (C-S-H). The use of synthetic crystalline filler C-S-H synthesized by hydrothermal synthesis in an autoclave at a pressure of 1 MPa and a temperature of 175 °C from a mixture of Ca(OH)2 and crystalline silica in a ratio different C/S=1 in the technology of non-autoclave silicate materials on the basis of alternative aluminium raw material allows to increase the operational indicators resulting products to 18 % or more. The optimal content of CaO and crystal filler C-S-H at which the maximum strength characteristics are provided is 8 % and 2.5 %, respectively, which allows to develop optimal compositions of raw materials for the technology of producing high-density non-autoclave silicate materials based on non-traditional aluminosilicate raw materials with a compressive strength of at least 20 MPa and more, with an average product density of no more than 2000 kg /m3.

scholarly journals INFLUENCE OF ARTIFICIAL CALCIUM HYDROSILICATES ON THE HARDENING PROCESSES AND PROPERTIES OF NON-AUTOCLAVE SILICATE MATERIALS BASED ON UNCONVENTIONAL ALUMINOSILICATE RAW MATERIALS

2020 ◽  
Vol 3 (2) ◽  
pp. 19-28 ◽  
Author(s):  
A. Volodchenko
Keyword(s):  
Structure Formation ◽  
Building Materials ◽  
Raw Materials ◽  
Strength Increase ◽  
Isothermal Exposure ◽  
Moisture Treatment ◽  
Calcium Hydrosilicates ◽  
Clay Rocks ◽  
Heat And Moisture ◽  
Silicate Materials

one of the possible ways to improve the properties of building materials is to modify the processes of structure formation, which can be realized through the use of crystalline primers. In this regard, it is urgent to study the effect of artificial calcium hydrosilicates on hardening processes, as well as the properties of non-autoclave silicate materials based on non-traditional aluminosilicate raw materials. Studies have shown that the addition of artificial calcium hydrosilicates (CSH) in an amount of 1-1.5 wt. %, when the content in the mixture of CaO is less than 10 wt. %, effectively increases the strength parameters of products at all stages of heat and moisture treatment from 8 to 16%. The most intense increase in strength is observed during the heat-moisture treatment (TBO) from 3 to 6 hours and is at least 13%, while in samples without the addition of artificial calcium hydrosilicates, the strength increase is 6%. The addition of artificial calcium hydrosilicates intensifies the processes of structure formation, which ensures an increase in crystalline matter, and, due to the fibrous structure, acts as a fiber, which contributes to the nano-reinforcement of the cementing substance formed from neoplasms in the CaO-SiO2(Al2O3)-H2O system based on clay rocks and calcium oxide. Due to the accelerated set of strength, it is possible to reduce the duration of isothermal exposure while maintaining the necessary performance characteristics.

Size Control of Block Polymer Templated Mesoporous Silicate Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Takeo Yamada ◽  
Keisuke Asai ◽  
Kenkichi Ishigure ◽  
Akira Endo ◽  
Hao S. Zhou ◽  
...  
Keyword(s):  
Mesoporous Materials ◽  
Molecular Sieve ◽  
Mesoporous Material ◽  
Triblock Copolymer ◽  
Size Control ◽  
Block Polymer ◽  
New Class ◽  
Mesoporous Silicate ◽  
Cubic Structure ◽  
Silicate Materials

ABSTRACTMesoporous materials have attracted considerable interest because of applications in molecular sieve, catalyst, and adsorbent. It will be useful for new functional device if functional molecules can be incorporated into the pore of mesoporous material. However, it is necessary to synthesize new mesoporous materials with controlled large pore size. Recently, new class of mesoporous materials has been prepared using triblock copolymer as a template. In this paper, we reported that hexagonal and cubic structure silicate mesoporous materials can be synthesized through triblock copolymer templating, and their size was controlled by synthesis condition at condensation.

Research on Two Traditional Silicate Materials in China’s Ancient Building

2011 ◽  
Vol 26 (12) ◽  
pp. 1327-1334 ◽  
Author(s):  
Lin-Yi ZHAO ◽  
Li LI ◽  
Zui-Xiong LI ◽  
Jin-Hua WANG
Keyword(s):  
Silicate Materials

Electroconducting metal-silicate materials

1997 ◽  
Vol 51 (1) ◽  
pp. 39
Author(s):  
M.G. Galuzinskiy
Keyword(s):  
Metal Silicate ◽  
Silicate Materials

Organic/Inorganic Hybrid Silicate Materials for Optical Applications; Highly Fluorinated Hybrid Glasses Doped with (Erbium-ions/CdSe nanoparticles) for Laser Amplifier Material

2004 ◽  
Vol 846 ◽  
Author(s):  
Kyung M. Choi ◽  
John A. Rogers
Keyword(s):  
Fluorescence Intensity ◽  
Nano Particles ◽  
Laser Amplifier ◽  
Inorganic Hybrid ◽  
New Family ◽  
Erbium Ions ◽  
Optical Applications ◽  
Hybrid Silicate ◽  
Chemical Strategy ◽  
Silicate Materials

A new family of organic/inorganic hybrid silicate materials, bridged polysilsesquioxanes, was designed and synthesized through a molecular-level mixing technique. Since hybrid materials in the molecular-composite level, whose domain sizes are in the nanometer-scale, and whose constituents often lose individual identities and thus create new properties, we obtained a set of improved properties from those organically modified glasses. By modifying the Si-O-Si polymeric network, in this study, we produced controllable, porous hybrid glasses for facile and uniform doping of various ions, metals or semiconductor particles. By taking advantage of void volume created in those molecularly modified silicate systems, novel optical materials with designed properties can thus be achieved. Via a chemical strategy, we designed hexylene- or fluoroalkylene-bridged hybrid glasses doped with both Er+3 ions and CdSe nano-particles for the development of new laser amplifier materials. In photoluminescence experiments, a significant enhancement in fluorescence intensity at 1540 nm has been obtained from the fluoroalkylene-bridged glass. The presence of CdSe nano-particles, by virtue of their low phonon energy, also appears to significantly influence the nature of the surrounding environment of Er+3 ions in those modified silicate systems, resulting in the increased fluorescence intensity.

Ordered Mesoporous Silicate Materials from a Template of Triblock Copolymer (II): Synthesis of Film and Application for Gas Sensor

2001 ◽  
Vol 206-213 ◽  
pp. 1985-1988
Author(s):  
Hao Shen Zhou ◽  
Takeo Yamada ◽  
Keisuke Asai ◽  
Itaru Honma ◽  
H. Uchida ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Triblock Copolymer ◽  
Mesoporous Silicate ◽  
Ordered Mesoporous ◽  
Silicate Materials
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