Application of Different Fibers to Reduce Plastic Shrinkage Cracking of Concrete

Rahmani, Tara; Kiani, Behnam; Bakhshi, Mehdi; Shekarchizadeh, M

doi:10.1007/978-94-007-4566-7_62

Cited by 27 publications

(9 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As expected, after the end of the test and up to 24 h, none of the cracks showed any significant increase in width. These results are in agreement with other similar studies [ 18 , 81 , 82 ].…”

Section: Resultssupporting

confidence: 94%

“…Soon after casting and during the initial setting time (2–4 h) (see Figure 1 ), the denser solid constituent materials tend to sink and can become unable to hold onto excess mixing water. This water migrates towards the surface and some bleeds out of the mix onto the surface [ 18 ]. The rate of bleeding depends on the water content, particle size distribution, viscosity, and rate of hydration of cement.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance of Manufactured and Recycled Steel Fibres in Restraining Concrete Plastic Shrinkage Cracks

2023

View full text Add to dashboard Cite

Early-age plastic shrinkage cracks can reduce the durability of concrete slabs by creating direct paths for the ingress of aggressive agents and thus accelerating degradation due to environmental attack, in particular, in hot and windy environments. The elimination of such cracks is essential for durable and sustainable concrete structures. This paper parametrically investigates the effect of manufactured steel fibres (MSF) and recycled tyre steel fibres (RTSF) on restraining plastic shrinkage and micro cracks at different dosages (10, 20, and 30 kg/m3). The plastic shrinkage tests were carried out in a specially designed chamber, according to ASTM C1579. Various environmental conditions are examined, and their impact on compressive strength and crack potential is assessed. A digital image analysis technique is used to measure length, width, and the area of the crack on the exposed surface to gain additional insights into crack behaviour. The results show a slight early-age (one-day) increase in compressive strength for the concrete exposed to the various environmental conditions, mostly as a result of higher temperatures. Through the use of the crack reduction ratio (CRR), both RTSF and MSF are shown to be successful in controlling plastic shrinkage and micro cracks, with the RTSF being superior due to the fact that they are better distributed in the concrete volume. The addition of 30 kg/m3 of RTSF was effective in preventing crack development in most environments or restraining cracks in extremely harsh environments. The adoption of these results will lead to more sustainable concrete slabs in the harsher environmental conditions created by climate change.

show abstract

Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Performance of Manufactured and Recycled Steel Fibres in Restraining Concrete Plastic Shrinkage Cracks

2023

View full text Add to dashboard Cite

show abstract

“…Furthermore, it is well known that in concrete repairs, cracking due to restrained shrinkage can reduce the performance of a structure and create a direct path for penetration of corrosive ions into the concrete that can in turn reduce the service life performance of the structure. Creep can significantly reduce the shrinkage-induced tensile stresses and delay or prevent the formation of cracks in repaired concrete [30][31][32][33][34][35][36].…”

Section: Big Data Handling In Gpmentioning

confidence: 99%

Genetic programming for experimental big data mining: A case study on concrete creep formulation

Gandomi

Sajedi

Kiani

et al. 2016

Automation in Construction

Self Cite

View full text Add to dashboard Cite

This paper proposes a new algorithm called multi-objective genetic programming (MOGP) for complex civil engineering systems. The proposed technique effectively combines the model structure selection ability of a standard genetic programming with the parameter estimation power of classical regression, and it simultaneously optimizes both the complexity and goodness-of-fit in a system through a non-dominated sorting algorithm. The performance of MOGP is illustrated by modeling a complex civil engineering problem: the timedependent total creep of concrete. A Big Data is used for the model development so that the proposed concrete creep model-referred to as a "genetic programming based creep model" or "G-C model" in this study-is valid for both normal and high strength concrete with a wide range of structural properties. The G-C model is then compared with currently accepted creep prediction models. The G-C model obtained by MOGP is simple, straightforward to use, and provides more accurate predictions than other prediction models.

show abstract

“…Lif kullanımı PRÇ riskini önlemede kullanılan en etkili yöntemlerden biridir [6]. Bilindiği üzere plastik haldeki betonun çekme dayanımı çok düşüktür ve artan su/bağlayıcı oranıyla birlikte daha da düşmektedir [7].…”

Section: Introductionunclassified

Agrega Tane Boyut Dağılımı ve PP Lif Kullanımının Betonda Plastik Rötre Çatlağı Oluşumu Üzerine Etkileri

Turkmenoglu

Atahan

2022

DÜMF MD

View full text Add to dashboard Cite

Plastik rötre betonun henüz sertleşmediği zaman diliminde meydana gelen yüzeysel bir çatlak türüdür. Temel nedeni beton yüzeyindeki buharlaşma hızının betonun terleme hızından yüksek olmasına bağlı olarak yüzeyin kurumasıdır. Böylece beton yüzeyi büzülmeye başlarken, alt kısımlarda kalan beton plastik kıvamda olduğu için yüzey ile benzer büzülmeyi gösteremez ve yüzeyde harita şeklinde çatlaklar oluşur. Yapılan çalışmada, toplam agrega hacminin sabit olduğu 3 farklı agrega dağılımına sahip beton ve 2 farklı polipropilen lif değişik oranlarda kullanılarak plastik rötre üzerine etkileri incelenmiştir. Deneylerde yöntem olarak ASTM C1579 standardı esas alınmış olup çatlak parametreleri deney sırasında çekilen fotoğraflar işlenerek elde edilmiştir. Elde edilen sonuçlar daha iri agrega dağılımının çatlak oluşumunu önlemede daha başarılı olduğunu ortaya koymuştur. Fakat çatlağı önlemek için kullanılan liflerin etkinliği agrega dağılımı irileştikçe azalmıştır. Diğer yandan kullanılan lifler plastik rötre çatlağını belirgin bir şekilde engellemişlerdir fakat aynı boydaki liflerden narinliği daha yüksek olan monofilament lifin kullanıldığı betonlardan daha iyi sonuçlar elde edilmiştir.

show abstract

Application of Different Fibers to Reduce Plastic Shrinkage Cracking of Concrete

Cited by 27 publications

References 7 publications

Performance of Manufactured and Recycled Steel Fibres in Restraining Concrete Plastic Shrinkage Cracks

Performance of Manufactured and Recycled Steel Fibres in Restraining Concrete Plastic Shrinkage Cracks

Genetic programming for experimental big data mining: A case study on concrete creep formulation

Agrega Tane Boyut Dağılımı ve PP Lif Kullanımının Betonda Plastik Rötre Çatlağı Oluşumu Üzerine Etkileri

Contact Info

Product

Resources

About