ArticleMaterials (Basel, Switzerland)2022
Influence of Silica Fume on High-Calcium Fly Ash Expansion during Hydration.
Article in Materials (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 11 citations in OpenAlex.
- Formation of the Structure and Properties of Building Ceramics Based on Coal Ash and Metallurgical Slags: A Review of Modern Research.Materials (Basel, Switzerland) · 2026Review
- Influence of colloidal nano silica on solidification mechanisms and hydration process of nano modified cement.Scientific reports · 2025Article
- Diatomaceous Earth-Lightweight Pozzolanic Admixtures for Repair Mortars-Complex Chemical and Physical Assessment.Materials (Basel, Switzerland) · 2022Article
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Authors and funding
2 authors at 1 institution in 1 country.
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Abstract
The purpose of this work was to study the possibility of neutralizing high-calcium fly ash expansion during hydration. The object of the study was the fly ash of Berezovskaya GRES, which is capable of independent setting and hardening. The test in the Le Chatelier molds showed that the divergence of indicator arms was 90-100 mm 1 day after mixing with water. The expansion and cracking of the fly ash could be completely prevented by silica fume addition in an amount of 42.9% by weight of the fly ash. At the same time, the compressive strength of specimens from the fly ash-sand paste in a ratio of 1:5 at the age of 28 days was 1.47 MPa. The isothermal heat release at a temperature of 20 °C for 10 days reached 500 kJ/kg. XRF and DTA results showed that free lime in the fly ash was completely hydrated in 11 days and gave the greatest expansion in the absence of silica fume. The presence of silica fume made the lime hydration incomplete and decreased the expansion. Unslaked free lime remained in the system. Exothermic data showed that silica fume inhibited CaO hydration from the reaction start.
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Registered trials
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