Silica fume and waste glass in cement concrete production: A review

Mehta, Ankur; Ashish, Deepankar Kumar

doi:10.1016/j.jobe.2019.100888

Cited by 208 publications

(122 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The shrinkage during drying was also higher. The information on the use of microsilica in concrete with glass waste is widely discussed in [Mehta and Ashish, 2019].…”

Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

The Influence of Silica Fume on the Mechanical and Thermal Parameters of Portland Cement Concretes

Strzałkowski¹,

Garbalińska²

2019

J. Ecol. Eng.

View full text Add to dashboard Cite

The influence of the silica fume (SF) addition on the basic mechanical and thermal parameters of cement concrete was presented in this paper. Numerous studies show that the specific properties of silica fume allow producing concretes with increased strength and durability properties. However, the results of the authors' own studies demonstrated that under specific circumstances, the SF addition can negatively affect the strength of cement concrete. In this paper, the concretes made from two types of coarse aggregate, 4-8 mm fraction: reference ordinary gravel aggregate (Ref) and broken basalt aggregate (Bas) were tested. Comprehensive tests (microstructural, strength and thermal) were carried out on three formulas: the first one (Ref-0) did not contain any additives or admixtures. Silica fume and superplasticizer were used in the second formula (Ref-8), introduced in the amount of 8% and 0.75% of the cement's weight, respectively. The third formula, based on basalt aggregate (Bas-8), also contained silica fume and a superplasticizer, dosed in the same amount as in the second formula. Porosimetric studies showed that the use of silica fume in the Ref-8 formula resulted in a decrease in the number of pores smaller than 0.15 μm in comparison to the Ref-0 reference concrete without the silica fume. On the other hand, numerous additional pores with diameters ranging from 0.05 to 300 μm were found in the Bas-8 concrete. In turn, optical porosimetry proved that the basalt-based concrete had numerous pores in the range above 70 μm, which were not observed in the case of the concretes with ordinary pebble aggregate. In the case of the normal concrete, the addition of silica fume resulted in an increase in the compressive strength. However, the basalt-based concrete, due to its much higher porosity, achieved significantly lower strength values. The results showed that the observed changes in porosity, caused by the presence of silica fume, resulted in lower values of thermal conductivity and specific heat of mature composites that it had been added to. This was particularly evident for the basalt-based concrete.

show abstract

“…The shrinkage during drying was also higher. The information on the use of microsilica in concrete with glass waste is widely discussed in [Mehta and Ashish, 2019].…”

Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

The Influence of Silica Fume on the Mechanical and Thermal Parameters of Portland Cement Concretes

Strzałkowski¹,

Garbalińska²

2019

J. Ecol. Eng.

View full text Add to dashboard Cite

show abstract

“…Higher shrinkage was also observed after drying. Additional information about the properties of concrete with silica fume and waste glass has been discussed in [41]. Other supplementary cementitious materials, such as magnetite dust, whose effect on the properties of heavy concretes is shown in [42,43], were also tested.…”

Section: Highly Reactive Pozzolansmentioning

confidence: 99%

The Effect of Aggregate Shape on the Properties of Concretes with Silica Fume

Strzałkowski

Garbalińska

2020

Materials

View full text Add to dashboard Cite

The paper examines the impact of aggregate shape on the compressive strength and thermal properties of concretes with silica fume based on two different aggregates: natural round gravel aggregate and crushed basalt aggregate. Compressive strength and thermal properties of individual concretes were determined during the first year of specimens curing. Additionally, porosity tests were conducted using mercury intrusion porosimetry and optical porosimetry. Mercury porosimetry tests showed that the use of silica fume led to a decrease in the content of pores of size smaller than 0.15 µm compared to the reference concretes without the addition of silica fume. However, tests carried out on crushed basalt-based concrete showed the presence of numerous additional pores with diameters ranging from 0.05 to 300 μm. In case of natural round gravel aggregate-based concrete, the addition of silica fume brought about an increase in its compressive strength. In turn, basalt-based concrete exhibited notably lower compressive strength values due to significantly higher porosity within the range of more than 70 μm. In basalt concrete, the obtained λ values are much lower than in concretes with normal gravel aggregate. In addition, the specific porosity structure had its impact on the process of drying of specimens of each group which occurred at a significantly faster rate in the basalt-based concrete. In conclusion, it can be stated that the use of crushed basalt aggregate causes a significant aeration of concrete, even despite the use of silica fume. As a result, the concrete based on crushed aggregate is characterized by a definitely lower compressive strength, but also better thermal insulation properties compared to analogous concrete made on natural round gravel aggregate.

show abstract

“…Высокоэффективные минеральные добавки характеризуются аморфным строением и высокой дисперсностью. Последнее вызывает повышение водопотребности бетонных смесей, поэтому для высокофункциональных бетонов применяются комплексные органо-минеральные добавки, состоящие из поликарбоксилатного водоредуцирующего компонента и активной минеральной добавки, например, микрокремнезѐма [11,12].…”

Section: кв шулдяков ля крамар бя трофимов ам махмудовunclassified

Structure and Properties of Hardened Cement Paste With Modifying Agents

Shuldyakov¹,

Kramar²,

Trofimov³

et al. 2020

build

View full text Add to dashboard Cite

Рис. 6. Рентгенограмма цементного камня с добавкой 1 % АСЕ Рис. 7. Электронная микрофотография цементного камня с 1 % АСЕ Рис. 8. Электронный микроснимок цементного камня с добавкой 1 % АСЕ и 12 % МК Рис. 9. Электронный микроснимок цементного камня, модифицированного добавкой 1 % СП-1

show abstract

Silica fume and waste glass in cement concrete production: A review

Cited by 208 publications

References 73 publications

The Influence of Silica Fume on the Mechanical and Thermal Parameters of Portland Cement Concretes

The Influence of Silica Fume on the Mechanical and Thermal Parameters of Portland Cement Concretes

The Effect of Aggregate Shape on the Properties of Concretes with Silica Fume

Structure and Properties of Hardened Cement Paste With Modifying Agents

Contact Info

Product

Resources

About