Study of inorganic powders used for preparation of waterproof coating to coal mine roadways

Song, Huiyu; Liu, Jianqiang; Xue, Fangbin; Cheng, Fangqin

doi:10.14314/polimery.2016.844

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…[ 26 ]. As can be seen in the figure, as the cement content increased, the tensile strength of the coating increased, and as the cement content increased, more hydrates were formed, including calcium silicates hydrates (CaH 2 O 4 Si) and calcium hydroxide Ca(OH) 2 [ 27 ]. The geometrically complex substances increased the material’s density and tensile strength.…”

Section: Resultsmentioning

confidence: 99%

Ameliorating the Mechanical Parameters, Thermal Stability, and Wettability of Acrylic Polymer by Cement Filling for High-Efficiency Waterproofing

et al. 2022

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Acrylic polymer/cement nanocomposites in dark and light colors have been developed for coating floors and swimming pools. This work aims to emphasize the effect of cement filling on the mechanical parameters, thermal stability, and wettability of acrylic polymer. The preparation was carried out using the casting method from acrylic polymer coating solution, which was added to cement nanoparticles (65 nm) with weight concentrations of (0, 1, 2, 4, and 8 wt%) to achieve high-quality specifications and good adhesion. Maximum impact strength and Hardness shore A were observed at cement ratios of 2 wt% and 4 wt%, respectively. Changing the filling ratio has a significant effect on the strain of the nanocomposites. The contact angle was increased as the concentration of additives and cement increased, indicating that the synthesized coating is not hydrophilic and does not allow water permeability through it. The results show that the acrylic polymer/cement with a cement ratio of 8 wt% is the best nanocomposite for high-efficiency waterproofing.

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Section: Resultsmentioning

confidence: 99%

Ameliorating the Mechanical Parameters, Thermal Stability, and Wettability of Acrylic Polymer by Cement Filling for High-Efficiency Waterproofing

et al. 2022

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“…(5) It is assumed that groundwater seepage has a stable flow and follows Darcy's law of seepage and hydraulic movement principles [22,23]. (6) It is assumed that the calculation parameters do not change with the groundwater environment after rock burst, and the calculation parameters are invariants in the calculation process [24][25][26].…”

Section: Basic Assumptions For Mechanical Calculationmentioning

confidence: 99%

Numerical Simulation of Cracking Failure and Weakening Law of Roadway Surrounding Rock under High Stress

Cheng

Chen

et al. 2021

Shock and Vibration

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In deep roadway mining, high water pressure causes rock mass cracking and weakens the overall strength, affecting the stability of underground metal mine mining roadways. Therefore, using a numerical simulation method, we analyzed the strain softening characteristics of rocks after the inflexion point of elasticity and studied the strain distribution and the minimum support resistance under high-pressure groundwater conditions. Considering the groundwater pressure and effective porosity on the strain softening characteristics of the surrounding rocks, we investigated the critical groundwater pressure under which the surrounding rocks would remain stable. Actual engineering verification helps to obtain the supporting characteristic curves under different influencing factors. We found that water pressure and effective porosity are the significant factors that decide the development scope of the plastic zone. The more significant the increase of the plastic zone, the more notable the changes in the support curve. Moreover, the plastic zone is likely to occur when the hydraulic head is between 30 and 50 m; when the hydraulic head exceeds 50 m, it is likely to produce a relaxation zone.

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“…Moreover, the good dispersion of the particles, leads to an increase in the surface area of the filler. Mechanical properties of the nano composites can be altered by various factor: properties of the matrix, filler particles size and morphology, particles loading and distribution, interfacial adhesion between filler particles and matrix [12]. Figure (3) shows that hardness values increase for both paints (nano and micro) after exposure to weather conditions.…”

Section: Adhesion Pull-offmentioning

confidence: 99%

Preparation of Nano Titanium Dioxide Using the Sol-Gel Method to Use in Friendly Environment Coatings

Saleh¹,

Abbas²,

Ibraheim

et al. 2021

IJOIR

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In this research, preparation of titanium dioxide nanomaterial (TiO2) using sol-gel method was achieved. 2.5 g weight of the titanium dioxide nanoparticles were added to the local paint using the casting method. Thin films were prepared by drop casting the paint onto the surface of pre-prepared samples, then several tests were carried out including adhesion test, hardness test (Shore B), brightness and whiteness, friction test, contact angle, and antibacterial activity. The nanomaterial at a percentage of 12% showed the best results when it was added to the paint. These results include adhesion strength, hardness strength, and exposing to weather conditions of temperature, and humidity. The adhesive strength increased when adding the nanomaterial from 112 to 139 before exposure to the weather and from 58 to 108 after exposure. The hardness also increased from 77.9 to 86.5 before exposure to the surrounding environment and from 94.2 to 96.8 after exposure. In addition, the paint with TiO2 nanoparticles exhibited antibacterial activity against two types of bacteria Escherichia coli (E. coli), staphylococcus aurous (S. aurous) and antifungal candida. Paint with TiO2 nanoparticles is more efficient as antibacterial agents with E. coli as compared with S. aurous and candida.

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Study of inorganic powders used for preparation of waterproof coating to coal mine roadways

Cited by 6 publications

References 1 publication

Ameliorating the Mechanical Parameters, Thermal Stability, and Wettability of Acrylic Polymer by Cement Filling for High-Efficiency Waterproofing

Ameliorating the Mechanical Parameters, Thermal Stability, and Wettability of Acrylic Polymer by Cement Filling for High-Efficiency Waterproofing

Numerical Simulation of Cracking Failure and Weakening Law of Roadway Surrounding Rock under High Stress

Preparation of Nano Titanium Dioxide Using the Sol-Gel Method to Use in Friendly Environment Coatings

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