Effect of specimen shape, silica fume, and curing age on durability properties of self-compacting concrete incorporating coarse recycled concrete aggregates

Sasanipour, Hossein; Aslani, Farhad

doi:10.1016/j.conbuildmat.2019.117054

Cited by 40 publications

(19 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Sasanipour H. et al research [12], the durability performance of self-compacting concretes containing coarse recycled concrete aggregates as a partial or total replacement of natural aggregates, and silica fume as a partial replacement of cement, was investigated. Replacing coarse recycled concrete aggregates decreased durability performance, but using silica fume in mixes significantly enhanced the electrical resistivity and chloride ion penetration resistance of self-compacting concrete.…”

Section: Aggregate Shapementioning

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

Section: Aggregate Shapementioning

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

show abstract

“…Even though these indirect measures have long been employed, their progress in relation to their use and application in construction has been remarkable since 2000 [19]. Some new trends in this field include their successful use at evaluating the compressive strength of concrete at early ages [20,21], to study the spatial variability of concrete strength [22,23], especially in beams [24], and high-precision detection of micro-cracking within the damaged concrete [2,25], especially with UPV analysis [26]. In addition, there is also a field of research regarding their applicability in concretes made with alternative materials [27,28], and in nonconventional concretes, such as high performance fiberreinforced concrete [29] and Self-Compacting Concrete (SCC) [30].…”

Section: Introductionmentioning

confidence: 99%

Models for compressive strength estimation through non-destructive testing of highly self-compacting concrete containing recycled concrete aggregate and slag-based binder

Revilla‐Cuesta

Skaf

Serrano-López

et al. 2021

Construction and Building Materials

View full text Add to dashboard Cite

“…The Rapid Chloride Penetration Test (RCPT), which is another such test, provides a diffusion-related conductivity measurement and index, where a higher RCPT value indicates greater concrete diffusion [ 26 ]. Factors that affect the RCPT include the compressive strength [ 26 ]; mineral admixtures such as fly ash [ 27 , 28 , 29 ]; aggregates [ 8 , 30 , 31 , 32 , 33 ]; curing conditions such as autoclaving, steam curing, and normal curing [ 34 ]; pore size [ 26 , 27 ]; RCA replacement ratio [ 35 , 36 , 37 ]; specimen temperature [ 38 , 39 , 40 ]; regional environment conditions [ 26 ]; test conditions [ 40 ]; multiple-stage mixing approaches [ 41 , 42 ]; and sodium silicate and silica fume coating of the RCA aggregate [ 41 , 42 ]. Especially, the RCA coating was observed to fill the cracks and pores using the ITZ of the concrete sample through microstructural analysis [ 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Drying Shrinkage and Rapid Chloride Penetration Resistance of Recycled Aggregate Concretes Using Cement Paste Dissociation Agent

Yang

Lee

2021

Materials

View full text Add to dashboard Cite

In the present study, a recycled concrete aggregate (RCA) coating treatment using a cement paste dissociation agent (CPDA) with different mixing methods was newly incorporated in RCA concrete mixtures. First, a preliminary test program was conducted to determine the proper dosage of the CPDA solution throughout its RCA concrete test results from compressive strength, flexural strength, and elastic modulus. Then, a series of experimental tests were carried out to investigate the effect of RCA coating treatment, different mixing method such as the equivalent mortar volume (EMV) method and conventional method, and different RCA replacement ratios on durability test results of RCA concrete such as drying shrinkage values and rapid chloride penetration test (RCPT) values. The test results showed that all RCA concretes mixed with the coated RCAs were found to be workable regardless of different mix methods, with the slump and air contents of all the mixes being almost identical. All the concrete specimens, which were mixed with the coated RCAs with CPDA solution, represented lower drying shrinkage and RCPT values than those mixed without RCA coating treatment, regardless of different mix proportioning methods or RCA replacement ratios. This holds for the concrete specimens proportioned with the EMV method, regardless of different RCA replacement ratios.

show abstract

Effect of specimen shape, silica fume, and curing age on durability properties of self-compacting concrete incorporating coarse recycled concrete aggregates

Cited by 40 publications

References 48 publications

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

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

Models for compressive strength estimation through non-destructive testing of highly self-compacting concrete containing recycled concrete aggregate and slag-based binder

Drying Shrinkage and Rapid Chloride Penetration Resistance of Recycled Aggregate Concretes Using Cement Paste Dissociation Agent

Contact Info

Product

Resources

About