1、Molecular elucidation of cement hydration inhibition by silane coupling

Here the authors show how silane coupling agents hinder calcium dissolution of tricalcium silicate from ab initio metadynamics simulations and hydration experiments.

2、Influence of silane on hydration characteristics and mechanical

In the present study, silane coupling agents (SCAs) were used as admixture in cement paste. The influence on the cement hydration in different stages as well as the mechanical properties were well investigated.

3、A cement paste–tail sealant interface modified with a silane coupling

Several studies of applying silane coupling agents to cement are reviewed herein.

Molecular elucidation of cement hydration inhibition by

Here we show dissolution behavior of tricalcium silicate (Ca 3 SiO 5) under 3-aminopropyl triethoxysilane impact using ab initio metadynamics, with experimental validation of the retardation effects in silane-treated pastes.

Molecular elucidation of cement hydration inhibition by silane coupling

Silane coupling agents retard early hydration when incorporated into fresh cement paste. Here the authors show how silane coupling agents hinder calcium dissolution of tricalcium silicate from ab initio metadynamics simulations and hydration experiments.

Effects of silanes and silane derivatives on cement hydration and

Less coupling reactions of the silane oligomers and silane nanoparticles with cement hydration products result in the mitigation on the retardation of cement hydration.

Surface modification of cured cement pastes by silane coupling agents

X-ray photoelectron spectroscopy (XPS) and static contact angle measurements were used to study the interaction between silane coupling agents and cured cement paste.

Effect of Silane Coupling Agent Treatment of Aggregates on

In recent years, silane coupling agents (SCAs) have been proven to be excellent surface modifiers [8, 9]. The silane functional groups in SCAs can chemically react with hydroxyl groups on the aggregate surface, forming chemical bonds or complexes.

Recent Progress in Silane Coupling Agent with Its Emerging

The methoxy-type silane coupling agent composites-based modification is discussed using diferent methods exhibiting higher reactivity towards hydrolysis.

(PDF) Recent Progress in Silane Coupling Agent with Its Emerging

This paper presents the effects of silane coupling agent, which includes interfacial adhesive strength, water treatment, polymer composites and coatings that make it valuable for...

Research Progress on the Reaction of Silane Coupling Agents with Cement

Abstract: Silane coupling agents (SCAs) are highly efficient surface modifiers widely used in the field of building materials. This paper reviews the research progress on the reaction of SCAs with cement, including their chemical structure, properties, and applications in cementitious materials. The chemical reaction mechanisms between SCAs and cement are discussed, and the effects of different types of SCAs on cement performance are analyzed. Additionally, application techniques for SCAs in the preparation and construction of cementitious materials are proposed. Finally, future research directions for the interaction between SCAs and cement are outlined.

Keywords: Silane coupling agent; Cement; Chemical reaction; Surface modification; Application techniques

Introduction: Silane coupling agents (SCAs), organic compounds containing silanol groups, exhibit excellent chemical stability, weather resistance, and adhesive properties. In recent years, with the development of high-performance concrete, self-healing concrete, and other advanced materials, the role of SCAs in cementitious systems has gained significant attention. This paper summarizes the progress in research on SCA-cement interactions, providing references for their application in cement-based materials.

1. Structure and Characteristics of Silane Coupling Agents SCAs primarily consist of silanol groups (-SiOH) and hydrocarbon chains (CₙH₂ₙ₊₁), with molecular structures containing one or more siloxane bonds (Si-O-Si). They exhibit both hydrophilic and hydrophobic properties, enabling reactions with various substances. SCAs also offer superior adhesion, aging resistance, and weatherability. By forming stable chemical bonds on the surface of cementitious materials, they enhance mechanical properties and durability.

2. Chemical Reaction Mechanisms Between SCAs and Cement The reaction mechanisms involve interactions between siloxane bonds in SCAs and hydroxyl groups on the cement surface:

• a) Hydrolysis: Siloxane bonds react with surface hydroxyls to form silicate gels, increasing material densification and strength.
• b) Esterification: Hydrocarbon chains in SCAs undergo esterification with hydroxyls, generating silanol groups that further improve densification and strength.
• c) Condensation: Siloxane bonds condense with hydroxyls to form siloxane chains, enhancing weather resistance and adhesion.
• d) Crosslinking: Hydrocarbon chains crosslink with hydroxyls, creating a three-dimensional network that boosts mechanical performance and durability.

3. Effects of Different SCAs on Cement Performance The impact of SCAs varies depending on their structure:

• SCAs with longer hydrocarbon chains typically enhance densification and strength.
• Highly reactive SCAs promote early-age strength development.
• Molecular structure adjustments can tailor weather resistance, adhesion, and durability of cementitious materials.

4. Application Techniques for SCAs in Cement-Based Materials To optimize SCA performance:

• Preparation: Control dosage, mixing time, and curing temperature to regulate SCA-cement reactions.
• Construction: Apply SCAs via spraying, brushing, or immersion to ensure uniform distribution and adhesion.
• Enhancement: Use supplementary methods like heating or pressure to accelerate reactions.

Research on SCA-cement interactions has provided new approaches for developing high-performance and self-healing concrete. Proper selection and application of SCAs can improve material properties, reduce costs, and align with green building requirements. gaps remain in understanding reaction mechanisms and influencing factors. Future studies should address these limitations to advance SCA applications in cementitious materials.