Modified cement-sodium silicate material and grouting technology for repairing underground concrete structure cracks

Zhang, Bin; Gao, Feng; Zhang, Xuefu; Zhou, Yuanfu; Hu, Beilun; Song, Heyang

doi:10.1007/s12517-019-4878-y

Cited by 16 publications

(6 citation statements)

References 8 publications

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“…Sang-SoonPark et al [13] impregnated concrete with water glass and found that the strength of the concrete was slightly increased, but the porosity of the concrete was improved more significantly, and its resistance to chloride ions was significantly increased. Bin Zhang et al [14] showed that the microcracking of concrete with the addition of sodium silicate material was less than that of conventional materials. Saud Al-Otaibi et al [15] used 4% and 6% water glass as activators to be added to the concrete, and the durability of the concrete was better in both cases.…”

Section: Introductionmentioning

confidence: 99%

Research on Capillary Water Absorption Characteristics of Modified Recycled Concrete under Different Freeze–Thaw Environments

Zhong,

Lu,

Mao

et al. 2024

Applied Sciences

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Recycled coarse aggregate is processed through the second crushing, which causes some internal damage, resulting in its physical indicators being far worse than natural coarse aggregate; its durability is relatively poor, and in the northern region, the soil contains a large number of acidic salt ions from the erosion of concrete, resulting in a decline in its durability. In this test, concrete was made from the single and composite immersion of recycled coarse aggregate using 5% water glass and 8% silane solution and subjected to a rapid freeze–thaw test in water, 3.5% NaCl solution, and 5% Na2SO4 solution, followed by a capillary water absorption test. The study was conducted to test the durability of recycled concrete, establish the initial capillary water absorption prediction model under freeze–thaw in different media, and analyze the internal structure of the RAC group after freeze–thaw using SEM. The test results showed that the composite-modified water absorption decreased the most, which can effectively improve the durability of recycled concrete, and the chloride salt caused the greatest erosion of recycled concrete and had the least clear water. The predictive model has high accuracy and can be used as a reference for capillary water absorption experiments on recycled concrete.

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Section: Introductionmentioning

confidence: 99%

Research on Capillary Water Absorption Characteristics of Modified Recycled Concrete under Different Freeze–Thaw Environments

Zhong,

Lu,

Mao

et al. 2024

Applied Sciences

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“…Predecessors have achieved plentiful and substantial outcomes of the research on grouting. To name a few, in terms of grouting theory, the classical permeation grouting theory, compaction grouting theory, fracture grouting theory, and their optimization are proposed [7][8][9][10][11][12][13][14]; in terms of grouting material, such as cement-based slurry, sodium silicate, silica sol, and other optimized slurry materials were studied [15][16][17][18][19][20]; in terms of diffusion mechanism of grouting slurry, the slurry diffusion mechanism has been studied considering the time-varying characteristics of viscosity [21][22][23], temperature-varying characteristics [24,25], and multi-field coupling [26,27]. In the research on permeation grouting with broken surrounding rock, Pan D.J.…”

Section: Introductionmentioning

confidence: 99%

Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock

Jiang

Pan²,

Zhang³

et al. 2022

Water

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Grouting can effectively seal and reinforce broken rock masses in deep geotechnical engineering, which have an important impact on groundwater-related disaster prevention and control. Based on multi-field coupling mechanics and rotational viscosity experiments, an advance grouting migration model of cement slurry in tunnels with high-stress broken surrounding rock is built against the background of the Xianglushan Tunnel for water diversion in central Yunnan Province. The influence characteristics of water–cement ratio, grouting pressure, and initial permeability on the process of grouting material migration are analyzed by combining classical column theory and spherical theory. The results show the following: Overall, the growth rate of grouting radius is fast during the earlier 5 min and slows down later. At the fifth minute, the normal grouting ranges are 22 cm, 51 cm, and 58 cm, at water–cement ratios 0.6, 0.8, and 1.0, respectively, while the normal grouting ranges are 58 cm, 51 cm, and 36 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; the normal grouting ranges are 58 cm, 24 cm, and 11 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. At the 60th minute, the normal grouting ranges are 47 cm, 133 cm, and 155 cm at water–cement ratios 0.6, 0.8, and 1.0, respectively; the normal grouting ranges are 155 cm, 131 cm, and 96 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; meanwhile, the normal grouting ranges are 155 cm, 63 cm, and 29 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. This study can provide theoretical guidance for on-site grouting design in unfavorable geological treatment projects.

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“…Cui et al [30] tested the setting time (the duration of solidification of grouting materials) of fly ashpromoted cement-based grouting mixtures. Zhang et al [31] modified the mixture ratio of cement-sodium silicate materials to satisfy the gelation time in concrete cracks reparation. Watterson and Siggard [32] investigated the compressive and time-dependent strength of fly ash-modified grouts.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Mixture Ratio and Diffusion Performance of Grouting Materials for Water Bursting Prevention in Coal Mines

Lian

Dai

et al. 2021

Advances in Materials Science and Engineering

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Grouting is a common and important technique for water bursting prevention in coal mines; the success of grouting in coal mines depends highly on the flowability of grouting materials and the strength of the hardened body as well. In this paper, a series of performance tests, in terms of the water-cement ratio, viscosity, drainage rate, presetting time, final setting time, compressive strength, and permeability were conducted on the cement-fly ash-based grout at various mixture ratios. The evolution of these performances versus different mixture ratios was analyzed; targeting at the reasonable flowability and hardened strength of grouting materials, an optimized mixture ratio was recognized for water bursting prevention in coal mines. Furthermore, the diffusion experiments of optimized grout material were designed taking into account the influence of confining and hydraulic pressure in the porous medium. As a result, the confining and hydraulic pressures have a linear negative correlation with the diffusion distance of grout materials. These results have guiding significance to water bursting prevention in coal mines.

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Modified cement-sodium silicate material and grouting technology for repairing underground concrete structure cracks

Cited by 16 publications

References 8 publications

Research on Capillary Water Absorption Characteristics of Modified Recycled Concrete under Different Freeze–Thaw Environments

Research on Capillary Water Absorption Characteristics of Modified Recycled Concrete under Different Freeze–Thaw Environments

Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock

Experimental Investigation on the Mixture Ratio and Diffusion Performance of Grouting Materials for Water Bursting Prevention in Coal Mines

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