Abstract
The utilization of natural and artificial lightweight aggregates in lightweight self-compacting concrete (LWSCC) is gaining popularity in research field. Extensive research has been carried out in the past decade all over the world to utilize lightweight aggregates (LWA) in self-compacting concrete (SCC). LWSCC, which uses renewable aggregates, has great potential to become an alternative material to conventional concrete. The paper is aimed to review the more recent research of physical properties of lightweight aggregates used in developing mix design of lightweight self-compacting concrete. In design, the mix proportion of LWSCC is a crucial factor to achieve the desired fresh and hardened concrete properties. The methods to develop LWSCC mix design with anticipated fresh and hardened concrete are reviewed. Research shows that the mix design LWSCC is preferably proportioned by aggregates packing concept. In addition, discussion on the fresh and hardened concrete properties is made and summarized in this paper. Studies indicate that there is a promising future for the use of lightweight aggregates in SCC as it shows satisfactory filling ability, passing ability, segregation resistance and compressive strength. Research gaps recommendations are then identified through this review to further discover lightweight self-compacting concrete in several aspects, particularly in term of sustainability.
Highlights
1.1 Concrete sustainability problem Concrete is a very common construction material which has been widely used throughout the world due to its versatility, availability and economy (Rodriguez de Sensale et al, 2015)
Compared to the methodology proposed by other researchers, this method is able to proportion the lightweight self-compacting concrete (LWSCC) mix design based on selected passing ability, density and compressive strength requirements
The resulting density is not within the upper limit of lightweight concrete in accordance to ASTM. It is clear from the research reviewed above that most of the proposed methodologies for proportioning LWSCC mix design are based on close aggregate packing principle
Summary
The paper is aimed to review the more recent research of physical properties of lightweight aggregates used in developing mix design of lightweight self-compacting concrete. The fresh and hardened state properties of LWSCC are highly depends on the physical properties of LWA used In this connection, specific gravity, size distribution, shape thickness and texture, bulk density and water absorption characteristic of lightweight aggregates will be elaborated. Aggregate specific gravity is important in the calculation of weight-to-volume relationships and to compute various volumerelated quantities such as voids presented in aggregate, and that the voids that must be filled by cementitious materials It affects the resulting workability and final density of designed LWSCC.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
