scispace - formally typeset
Search or ask a question
Topic

Silica fume

About: Silica fume is a research topic. Over the lifetime, 10177 publications have been published within this topic receiving 173857 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors developed a numerical model that simulates the hydration of concrete containing silica fume, fly ash or slag, and determined the heat evolution rates of these admixture-blended concrete were determined by the contribution of both cement hydration and the reaction of the mineral admixtures.
Abstract: Silica fume from certain metallurgical operations, granulated slag from metal industries and fly ash from the combustion of coal are industrial by-products that have been widely used as mineral admixtures in normal- and high-strength concrete. Due to the reaction between calcium hydroxide (CH) and mineral admixtures, the hydration of concrete containing mineral admixtures is much more complex compared with that of Portland cement. In this paper, the production of CH in cement hydration and its consumption due to the reaction of mineral admixtures is considered in order to develop a numerical model that simulates the hydration of concrete containing silica fume, fly ash or slag. The heat evolution rates of these admixture-blended concrete were determined by the contribution of both cement hydration and the reaction of the mineral admixtures. The proposed model was verified with experimental data on concrete with different water/cement ratios and mineral admixture substitution ratios.

126 citations

Journal ArticleDOI
TL;DR: In this paper, the compressive strength, Ca(OH) 2 and non-evaporable water contents and pore-size distribution were monitored up to 180 days with 0, 10 and 30 percent silica fume.

125 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of silica fume on workability level and its maintenance of fresh concrete; strength development, strength optimization and elastic modulus of hardened concrete; and chemical and mechanical durability of mortar.
Abstract: Proper introduction of silica fume in concrete improves both the mechanical and durability characteristics of the concrete. This paper presents the results of research effort conducted at the American University in Cairo using Egyptian silica fume in concrete. The program investigated various characteristics of silica‐fume concrete. It emphasized the effect of silica fume on workability level and its maintenance of fresh concrete; strength development, strength optimization and elastic modulus of hardened concrete; and chemical and mechanical durability of mortar. The experimental program comprised six levels of silica‐fume contents (as partial replacement of cement by weight) at 0% (control mix), 5%, 10%, 15%, 20%, and 25%, with and without superplasticizer. It also included two mixes with 15% silica fume added to cement in normal concrete. Durability of silica‐fume mortar was tested in chemical environments of sulfate compounds, ammonium nitrate, calcium chloride, and various kinds of acids. It was foun...

125 citations

Journal ArticleDOI
TL;DR: In this article, the effect of viscosity modifying agent (VMA) and silica fume on the rheological and mechanical properties of self compacting concrete is investigated.

124 citations

Journal ArticleDOI
TL;DR: In this article, the influence of silica fume on the hydration heat of concrete was evaluated using a semi-adiabatic calorimetric method for 10 days at 20°C.

124 citations


Network Information
Related Topics (5)
Compressive strength
64.4K papers, 1M citations
89% related
Ultimate tensile strength
129.2K papers, 2.1M citations
76% related
Fracture mechanics
58.3K papers, 1.3M citations
75% related
Corrosion
152.8K papers, 1.9M citations
74% related
Fracture toughness
39.6K papers, 854.3K citations
74% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023485
2022944
2021621
2020726
2019779