Overview of trends in the application of waste materials in self-compacting concrete production

Adesina, Adeyemi; Awoyera, Paul O.

doi:10.1007/s42452-019-1012-4

Cited by 66 publications

(22 citation statements)

References 90 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While the increase in the workability with the incorporation of FA can be associated with the ability of the FA to reduce the rate of water absorption of the mixture. These observations corresponded to other studies where the incorporation of FA into conventional SCC mixtures resulted in higher workability [9,41,42]. Patel and Shah [31] observed a significant decrease in the workability when RHA was incorporated as partial replacement of the FA up to 25% in AASCC mixtures.…”

Section: Slumpsupporting

confidence: 89%

“…The advancement in concrete technology has also led to the development of a special type of concrete called self-compacting concrete (SCC). As the name implies, SCCs are very flowable and able to consolidate under their weight [9]. In addition, to their self-compacting ability, they possess high passing and filling ability coupled with outstanding segregation resistance which makes them suitable for various applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance and sustainability overview of alkali-activated self-compacting concrete

Adesina

2020

Waste Dispos. Sustain. Energy

Self Cite

View full text Add to dashboard Cite

Self-compacting concrete (SCC) has gained huge attention recently due to its high workability which eliminates the need for vibration and makes its placement easier compared to conventional concrete. However, the production of Portland cement (PC) which is the main binder in SCC is energy-intensive and one of the major contributors to the world's carbon dioxide emission. On the other hand, the use of alkali-activated binders (AABs) in concrete has been reported to reduce the energy consumption and carbon emission of concrete by more than 50%. Therefore, the use of AAB as a binder in SCC can help to achieve an eco-friendlier concrete. This paper gives a short overview of the performance of SCC made with AABs. The effect of various factors on the performance of alkali-activated self-compacting concrete (AASCC) was discussed and a simplified sustainability assessment of AASCC was carried out. Discussions from this paper showed that AASCC with acceptable fresh and hardened properties can be achieved with the proper selection of materials. In addition, the evaluation of the embodied energy and carbon of different types of concrete showed that AASCC is more sustainable. However, more research in this field is required to encourage its universal acceptance and large-scale application.

show abstract

Section: Slumpsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Performance and sustainability overview of alkali-activated self-compacting concrete

Adesina

2020

Waste Dispos. Sustain. Energy

Self Cite

View full text Add to dashboard Cite

show abstract

“…greater than 10%) was attributed to the formation of new phases which alters the decrystallization of gaylussite. This observation is similar to the effect of limestone powder when used as partial replacement of PC in cementitious composites [33].…”

Section: Limestone Powdersupporting

confidence: 78%

Influence of various additives on the early age compressive strength of sodium carbonate activated slag composites: An overview

Adesina

2020

Journal of the Mechanical Behavior of Materials

Self Cite

View full text Add to dashboard Cite

The use of sodium carbonate as an alkali activator for slag to produce alkali-activated slag is promising due to its sustainable, economic and user-friendly properties. However, the lower early age performance of composites made with such binder has limited its use especially in applications where higher early age is required. Hence, in order to propel the application of this sustainable binder, it is imperative to find ways in which the early age performance can be enhanced without having a detrimental effect on later age performance. One of the effective and sustainable ways to enhance the early age strength of sodium carbonate activated slag is by incorporation of various additives as partial replacement of sodium carbonate on/and slag. In order to propel more application of sodium carbonate slag for various applications, this current study was undertaken. In this paper, an overview of the types of various additives that can be used to enhance the early age compressive strength of sodium carbonate activated slag composites was discussed. The mechanism and dosage of each of the additives were briefly discussed alongside the limitation and advantages of the additives. Findings from this overview showed that the early age compressive strength of sodium carbonate activated slag can be enhanced with the use of additives such as calcium oxide, calcium hydroxide, Portland cement, sodium hydroxide and sodium silicate.

show abstract

“…This type of concrete flows within the formwork with no need for internal or external vibration, and is compacted solely under the influence of its own weight. The distinctive features of this type of concrete include high deformability, flowability and segregation resistance, which cause its widespread use in different types of structures [1,2]. Respecting SCC properties, behavioral features of conventional concrete and SCC cannot be assumed similar.…”

Section: Introductionmentioning

confidence: 99%

Experimental verification and simulation of fracture behavior of CFRP reinforced self-consolidating concrete beams with initial notch

et al. 2020

View full text Add to dashboard Cite

The current study presents numerical and experimental approaches in the assessment of fracture behavior of self-consolidating concrete beams strengthened with carbon fiber-reinforced polymer (CFRP) lamina. The failure modes, mid-span displacement, and the load-bearing capacity of specimens with initial notches at mid-span are analyzed by varying the notch length and the beam height. Furthermore, the effects of variations in CFRP and concrete mechanical properties, bond strength, and notch location are examined by using the non-linear finite element analysis. Findings reveal that stress concentration in concrete and CFRP, in the vicinity of initial notch, as well as the failure of specimens occur as a result of CFRP debonding and crack extension. Moreover, it is observed that load-mid-span displacement curves are characterized by two peak load points strength. At the first stage, the applied load increases up to one peak value and then at the second stage there is a drop in the load-caring capacity. The applied load is then improved to another peak value due to the relatively high cohesive effect of the CFRP sheet at the third stage. Among different variables, the second peak load shows higher sensitivity to variations of the elastic modulus of CFRP, and bond strength at interface. As the notch approaches the beam support, and hence the relative distance from mid-span changes from 0 to 2/3, the two peak loads are respectively escalated by 116 and 58%, and thus the inclined crack propagates toward mid-span.

show abstract

Overview of trends in the application of waste materials in self-compacting concrete production

Cited by 66 publications

References 90 publications

Performance and sustainability overview of alkali-activated self-compacting concrete

Performance and sustainability overview of alkali-activated self-compacting concrete

Influence of various additives on the early age compressive strength of sodium carbonate activated slag composites: An overview

Experimental verification and simulation of fracture behavior of CFRP reinforced self-consolidating concrete beams with initial notch

Contact Info

Product

Resources

About