Effectiveness of fly ash on the restrained shrinkage cracking resistance of self-compacting concrete

Altoubat, Salah; Junaid, M. Talha; Leblouba, Moussa; Badran, Deena

doi:10.1016/j.cemconcomp.2017.01.010

Cited by 74 publications

(28 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…concrete are 256×10 -6 and 296×10 -6 , respectively, showing decreases about 4 % and 5 % compared with those of C35 and C45 concrete, respectively, indicating that the incorporation of fly ash may be able to compensate the negative effect of silica fume on drying shrinkage to some extent. This trend is in good agreement with the findings reported by Altoubat et al 42 .…”

Section: Resultssupporting

confidence: 94%

“…2 -6 , respectively, which are about 42×10 -6 and 34×10 -6 smaller than those of control concrete (C45 and C35). This is likely due to the fact that partial replacement of fly ash for cement could decrease cement content and hinder the cement hydration, thereby alleviating the development of shrinkage 20,42 . With prolongation of hydration time, the pozzolanic reaction of fly ash at late age would optimize the pores and improve the resistance to shrinkage to some extent 43,44 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

et al. 2021

View full text Add to dashboard Cite

Dam concrete suffers from serious abrasion damages in southwestern China, the abrasion resistance of concrete is therefore one of the most important factors determining the reliability even the safety of the dams. In the present work, the effects of fly and/or silica fume on the mechanical properties, drying shrinkage, as well the cracking and abrasion resistance of concrete were investigated, then the pore structures of concrete added with fly ash and silica fume and the pore surface fractal dimensions (Ds) were determined by the mercury intrusion porosimetry (MIP) method and a fractal model, respectively. Finally, the relationships between the abrasion resistance of concrete and the porosity as well as the Ds were revealed and discussed. The results indicate that silica fume significantly increases the drying shrinkage especially at early age, while the incorporation of fly ash and silica fume together can decease the early plastic shrinkage-induced cracking risk and the final shrinkage to some degrees. Besides, the utilization of 5 wt% silica fume and 20 wt% fly ash together increases the abrasion resistance and mechanical property by about 4-9 % at various ages. In addition, the compressive strength and the abrasion resistance of concrete are linearly correlated with the concrete porosity and the Ds. Both the fly ash and silica fume could decrease the porosity of concrete and increase the Ds, therefore the concrete containing fly ash

show abstract

Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The current standards suggest that a non-reactive and non- [19] absorptive material should be used for the outer ring, such as PVC or steel and provide guidance regarding its minimum thickness depending on the material used. In the majority of the studies there is no explicit description of the materials used for the outer rings, whilst indeed PVC [14,16,20,24,26,30,52,61,68,79] and steel [37,45,47,62,69,77,80,82,[85][86][87][88][89] is reported in studies in which this matter is accounted for, with the exception of a few studies reporting a cardboard tube as an outer ring [46,57,72,74].…”

Section: Figure 4: Resulting Stress Development In the Restrained Conmentioning

confidence: 99%

Assessment of behaviour and cracking susceptibility of cementitious systems under restrained conditions through ring tests: A critical review

Kanavaris

Azenha

Soutsos

et al. 2019

Cement and Concrete Composites

View full text Add to dashboard Cite

Cracking occurrence due to shrinkage related effects is a widely recognised issue which is frequently evaluated with the shrinkage restraining ring test. This paper provides a state-of-the-art review of the ring test method, which has been used for the last four decades. The last review on such matter was conducted only in early 2000s; however, a significant amount of studies has been conducted since then and considerable advancements or modifications in this testing method have taken place over the last decade. Studies on the traditional ring test, i.e. a circular concrete ring cast around a steel ring, are identified and the history, tendencies, practices and quantitative methods are analysed thoroughly. Furthermore, any modifications/advancements in the testing method with respect to their purpose, applications and capabilities based on current knowledge, are addressed. Finally, an insight on the challenges that the developers of testing methods for restrained shrinkage are facing with is given together with perspectives for their future potential improvement.

show abstract

“…Altoubat et al [14] in a study investigated the effect of fly ash (FA) on cracking and relaxation behavior of various SCC mixes. e experimental results revealed that adding FA can improve the cracking resistance and relaxation behavior of SCC mixes.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Plastic Shrinkage Cracking of Self‐Compacting Concrete

Ghoddousi

Abbasi

Shahrokhinasab

et al. 2019

Advances in Civil Engineering

View full text Add to dashboard Cite

Concrete exposed to hot climatic conditions is prone to plastic shrinkage after casting within the first few hours due to the water evaporation and restraining conditions of concrete. This cracking is more commonly observed in concrete elements with a large surface area exposed to drying. In this research, plastic shrinkage of 13 self-compacting concrete samples with different cement paste volumes and various coarse to total aggregate ratios was studied. Test specimens of fresh concrete were subjected to a wind tunnel, which simulated hot dry environmental condition immediately after casting. It can be observed from the test results that the relationship between free plastic shrinkage and the difference between bleeding and evaporation is direct and linear. Finally, a model for plastic shrinkage estimation was suggested by considering the effect of free plastic shrinkage strain, restraining factor, and tensile strain capacity of self-compacting concrete.

show abstract

Effectiveness of fly ash on the restrained shrinkage cracking resistance of self-compacting concrete

Cited by 74 publications

References 7 publications

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

Assessment of behaviour and cracking susceptibility of cementitious systems under restrained conditions through ring tests: A critical review

Prediction of Plastic Shrinkage Cracking of Self‐Compacting Concrete

Contact Info

Product

Resources

About