Related Experiment Video
Updated: Jun 23, 2026
08:04
Preparation of Functional Silica Using a Bioinspired Method
Published on: August 1, 2018
Sodium Silicate Grouting: Mechanisms, Environmental Impacts, and Research Directions.
Mohammad Valibeknejad1, Thomas Sweijen1, Alraune Zech1
1Environmental Hydrogeology Group, Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands.
Transport in Porous Media
|June 22, 2026
Summary
Sodium silicate grouting inconsistently reduces soil permeability due to soil and groundwater variations. This review synthesizes research to improve reliability and environmental compatibility of this soil stabilization technique.
Area of Science:
- Geotechnical Engineering
- Environmental Science
- Materials Science
Background:
- Sodium silicate grouting is widely used for soil permeability reduction and reinforcement.
- Field performance is inconsistent, affected by soil heterogeneity, groundwater, and contaminants.
- Environmental risks of silica gels, including leaching and degradation, require further understanding.
Purpose of the Study:
- To provide a comprehensive review of sodium silicate grouting since the 1990s.
- To examine coupled processes governing injection, gelation, and post-gelation evolution.
- To identify parameters controlling performance and evaluate environmental impacts.
Main Methods:
- Integration of scientific studies, field applications, and industry practice.
- Analysis of micro-, pore-, and field-scale processes.
- Evaluation of sand-gel interactions, microstructural development, and strength enhancement.
Main Results:
- Key hydraulic, chemical, thermal, and environmental parameters influencing grouting performance were identified.
- Mechanisms of permeability reduction and strength enhancement were detailed.
- Electrical Resistivity Tomography (ERT) potential for monitoring grout continuity was discussed.
Conclusions:
- Critical research is needed to develop constitutive relationships for grout properties and improve predictive modeling.
- More reliable, sustainable, and environmentally compatible applications of silicate grouting are achievable.
- Addressing inconsistencies and environmental risks is crucial for advancing grouting technology.
Related Concept Videos
01:26Alkali Aggregate Reaction in Concrete
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
01:22Effect of Sea Water on Concrete
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks, which undergo...
Concrete in areas between tide marks, which undergo...
01:28Effects of Air-entrainment in Concrete
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
01:22Waterproofing and Anti-Bacterial Admixtures in Concrete
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
01:30Superplasticizers
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
01:21Pozzolans
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is a...
Fly ash is a...