scholarly journals Development and Field Test of New Environmentally Friendly Water-Rich Sand Grout Material

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Wang Hongbo ◽  
Liu Rentai ◽  
Zhang Qingsong
Keyword(s):  
Fly Ash ◽  
Stone Formation ◽  
Poor Performance ◽  
Environmental Water ◽  
High Ratio ◽  
Common Source ◽  
Underground Engineering ◽  
Grouting Material ◽  
New Type ◽  
Grouting Materials

The water-rich sand layer is a common source for underground engineering disasters. Considering the poor performance, high cost, and serious environmental pollution of conventional grouting materials, based on the requirements of environmental grouting treatment, a new type of environmental water-rich sand grouting material was proposed, which was mainly based on fly ash and cement and supplemented by water glass. The performance of the slurry was studied. The parameters such as the initial set time, the ratio of stone, and the compressive strength of the material under different water contents and fly ash contents were determined by experiments. The new grouting material was obtained with rapid setting, early strength, high ratio of stone formation, and strength, which were less affected by water content. The successful application of the new environmental grouting material in the Qingdao Metro not only ensures the safety of the project but also meets the requirements of environmental protection. It also verifies the scientificity of the material and will be useful for the innovation of the water-rich sand grouting material.

Plugging Performance Optimization Tests of Grouting Material for Sudden Water Inflow of Underground Engineering Construction

2011 ◽  
Vol 306-307 ◽  
pp. 722-726 ◽  
Author(s):  
Li Ping Li ◽  
Shu Cai Li ◽  
Jin Sheng Cui ◽  
Zhao Li
Keyword(s):  
Performance Optimization ◽  
Water Pressure ◽  
High Water ◽  
Water Inflow ◽  
Karst Area ◽  
Seepage Water ◽  
Underground Engineering ◽  
Grouting Material ◽  
New Type ◽  
Plugging Performance

Sudden water inflow is the typical geological hazard during the construction period of underground, especially for the karst area. According to a new type of polymer chemical grout material called Malisan, plugging performance optimization tests of different grouting material had been carried out, such as ordinary cement, superfine cement and special cement of HSC, the geo time, consolidating strength, anti-erosion property and comprehensive properties of grouting harnessing had been systematically analyzed and compared. Test results showed that the new type of polymer chemical grout material has the significant characteristics of controllable gel time, high consolidating strength, anti-scour performance, water swelling and extremely strong permeability, it is more effective than conventional grouting material for grouting harnessing of seepage, water spraying and water inflow with high water pressure, in addition, it is convenient for transportation, material configuration and process operation.

Preliminary Study on Nanometer Grouting Materials

2011 ◽  
Vol 418-420 ◽  
pp. 139-142
Author(s):  
Li Guo ◽  
Bing Xie ◽  
Hong Fang Li
Keyword(s):  
Solid Particle ◽  
Underground Engineering ◽  
Water Shutoff ◽  
Grouting Material ◽  
Molecular Dimension ◽  
Particle Dimension ◽  
Preliminary Study ◽  
Grouting Materials ◽  
The Cost ◽  
Cost Of Construction

The application of grouting technology in the reinforcement and water shutoff of underground engineering is very extensive. The grouting technology mainly includes two aspects: grouting process and grouting material. The grouting material is a vital link in grouting. It affects the cost of construction directly, and determines the success or failure of the engineering. The smaller the molecular dimension of solution or solid particle dimension, the greater the scope that the grout can be injected into. And it is beneficial to the grouting effect. With the development of nanotechnology, the development of nanometer grouting materials is feasible, and is also a great breakthrough for the grouting technique.

Researching on a New Grouting Material and its Engineering Application

2015 ◽  
Vol 1088 ◽  
pp. 544-548 ◽  
Author(s):  
Jing Lei Dou ◽  
Jing Feng Dou ◽  
Yu Juan Guo
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Coal Mine ◽  
Engineering Application ◽  
The Body ◽  
Gas Explosion ◽  
Cement Material ◽  
Grouting Material ◽  
Grouting Materials

Water-irruption is the second to gas explosion of major security problems in coal mine. The grouting material is composed of fly ash and montmorillonite separately according to a certain proportion with pure cement material. On the site grouting test and compare the compressive strength of the stones of the body and the size of the diffusion radius, and compare the grouting materials with pure cement materials. Through the comparative and analysis, the reasonable grouting materials are choosen.

Research on Grouting Materials for Underground Construction Projects

2021 ◽  
Vol 1036 ◽  
pp. 319-326
Author(s):  
Hao Ran Duan ◽  
Peng Zhao ◽  
Lei Qin ◽  
Feng Jiao Shi
Keyword(s):  
Environmental Pollution ◽  
Large Scale ◽  
Raw Materials ◽  
Development Trend ◽  
Engineering Practice ◽  
Underground Engineering ◽  
Chemical Grouting ◽  
Cement Grouting ◽  
Grouting Material ◽  
Grouting Materials

The engineering practice shows that the application of grouting technology to treat underground engineering has strong applicability and is one of the most commonly used technical means at present. Based on the underground engineering, this paper introduces the research achievements of grouting materials in recent years, including cement-based grouting materials, mixed grouting materials, anti-scouring grouting materials, and ultra-fine cement grouting materials. Current demand of grouting materials in underground engineering, there exists large dosage of cement, high content, high cost, serious environmental pollution problems, such as looking for alternatives or mixed with other raw materials for preparation of cementation material become the development trend, compared with the cement grouting material, chemical grouting material with higher performance, but in smaller projects within the scope of application. How to reduce the production cost of chemical grouting materials, simplify the production process, overcome the existing toxicity, reduce environmental pollution and improve the durability of solidified body has become the bottleneck of its popularization and application. Some achievements have been made in the modification of cement or chemical materials by nanometer components, but there is still a long way to go before the large-scale application of grouting engineering.

scholarly journals Optimization of Grouting Material Mixture Ratio Based on Multi-Objective Optimization and Multi-Attribute Decision-Making

2021 ◽  
Vol 14 (1) ◽  
pp. 399
Author(s):  
Luchang Xiong ◽  
Zhaoyang Zhang ◽  
Zhijun Wan ◽  
Yuan Zhang ◽  
Ziqi Wang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Environmental Pollution ◽  
Material Properties ◽  
Raw Materials ◽  
Multi Objective Optimization ◽  
Mixture Ratio ◽  
Multi Objective ◽  
Grouting Material ◽  
Regression Functions ◽  
Grouting Materials

As a solid waste produced by coal combustion, fly ash will cause serious environmental pollution. However, it can be considered as a sustainable and renewable resource to replace partial cement in grouting materials. Fly ash grouting materials re-cement the broken rock mass and improve the mechanical properties of the original structure. It can reinforce the broken surrounding rock of mine roadway. The utilization of fly ash also reduces environmental pollution. Therefore, this paper establishes a new material mixture ratio optimization model to meet the requirement of material property through combining the methods of experimental design and numerical analysis. Based on the Box–Behnken design with 3 factors and 3 levels, a mathematical model is constructed to fit the nonlinear multiple regression functions between material properties and raw materials ratios. The influence of raw materials is analyzed on material properties (the material’s 7-day uniaxial compressive strength, initial setting time, and slurry viscosity). Then, 80 Pareto solutions are obtained through NASG-II algorithm which takes the regression functions as the objective functions for multi-objective optimization of the grouting material ratio. Finally, the best ratio solution of water-cement ratio—0.71, silica fume content—1.73%, and sodium silicate content—2.61% is obtained through the NNRP-TOPSIS method.

Study of Rheological Properties of Carbon Nanotube-Reinforced Ultrafine Cement Grouting Materials

2021 ◽  
pp. 1-44
Author(s):  
Yunxiao Liu ◽  
Jiahang Zhang ◽  
Yinyin Chi
Keyword(s):  
Carbon Nanotubes ◽  
Rheological Properties ◽  
Polyvinyl Pyrrolidone ◽  
Cement Grouting ◽  
Grouting Material ◽  
Multi Walled Carbon Nanotubes ◽  
Different Diameters ◽  
Grouting Materials ◽  
Walled Carbon Nanotubes ◽  
Ultrafine Cement

In this study, three different diameters of multi-walled carbon nanotubes (MWCNTs) dispersed by polyvinyl pyrrolidone (PVP) were used to reinforce superfine cement grouting materials. The effect of MWCNTs and polyvinyl pyrrolidone (PVP) on the rheological properties of grouting material were accordingly studied. It was found that the yield stress (τ0) and plastic viscosity (η) were slightly decreased when PVP content was low and increased when the PVP content increased. The effect of MWCNT diameter on τ0 was not found to be clear but was more significant on η. The smaller MWCNT diameter was, the more quickly η increase. It was also found that the thixotropic ring area was increased as the MWCNTs content increased. The addition of PVP and MWCNTs caused an increase in the number of entanglement points in different scales, which was the main reason for the viscosity and thixotropy increase. Therefore, the rheological properties of superfine cement grouting material should be adjusted when MWCNTs were added as a reinforcing component. Due to the wrapping of PVP on cement particles which isolates the contacting part between the water and the cement particles, it slows down the cement's hydration rate thus slows down the fluidity loss of the slurry.

Monitoring of Chemical Resistance of New Grouting Materials

2021 ◽  
Vol 898 ◽  
pp. 27-33
Author(s):  
Petr Figala ◽  
Rostislav Drochytka ◽  
Vit Černý ◽  
Radek Hermann ◽  
Jiří Kolísko
Keyword(s):  
Fly Ash ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Waste Glass ◽  
Sulphate Solution ◽  
Sulphate Attack ◽  
Glass Waste ◽  
Foundry Sand ◽  
Waste Foundry Sand ◽  
Grouting Materials

This paper deals with the study of chemical resistance of new cement-based grout for invert grouting. The aim of this work is to verify new mixtures with specific admixtures. The study monitors resistance to external sulphate attack. Specimens were placed into sulphate solution 29.8 g∙l-1 (44 g∙l-1 Na2SO4) according to DIN19753 standard. Based on the results gained, new mixtures will be designed and optimized by addition of suitable secondary raw materials (fly ash, waste foundry sand, waste glass, waste filers).

scholarly journals Polyurethane/Red Mud Composites with Flexibility, Stretchability, and Flame Retardancy for Grouting

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 906 ◽  
Author(s):  
Chunjing Zhang ◽  
Bo Shuai ◽  
Xuefeng Zhang ◽  
Xinxin Hu ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Flame Retardancy ◽  
Red Mud ◽  
Three Dimensional ◽  
Engineering Application ◽  
Synergistic Interactions ◽  
Grouting Material ◽  
Dimensional Network ◽  
Grouting Materials ◽  
Inorganic Composite

Flexibility, stretchability, and flame retardancy are of ever increasing importance in constructing grouting materials. Herein, a simple and effective strategy to make organic-inorganic composite grouting material in a “flexible, stretchable, and flame retardant” way was based on the excellent synergistic interactions among polyurethane prepolymer, red mud, polyethylene glycol, and trimethylolpropane. The resultant polyurethane/red mud composite grouting material with three-dimensional network structure presented a favorable flexibility, desirable compressive strength of 29.2 MPa at 50% compression state, and a good elongation at 15.1%. The grouting material was mainly composed of amorphous polyurethane and crystalline red mud, and its probable formation mechanism was reaction of prepolymer with H2O, polyethylene glycol and trimethylolpropane under vigorous stirring in the presence of catalyst. Furthermore, the grouting material possessed favorable thermal stability, flame retardancy and repairment performance for roadway cracks. This work may open a simple and convenient avenue for the massive engineering application of red mud and preparation of flexible organic-inorganic hybrid grouting material.

Development of Grouting Material for Fly Ash Backfilling by Application of Chemical Injection

2014 ◽  
pp. 403-410
Author(s):  
Hideki Shimada ◽  
Yasuhiro Yoshida ◽  
Yasutaka Maeda ◽  
Takashi Sasaoka ◽  
Shuichi Fujita ◽  
...  
Keyword(s):  
Fly Ash ◽  
Grouting Material
Sign in / Sign up

Export Citation Format

Share Document