Abstract:The scope of this study is twofold: first to present the current state-of-knowledge on lightweight aggregate selfcompacting concrete (LWASCC) and second to discuss the development of pumice aggregate self-compacting concrete (PASCC) falling in the LC20/22 strength class and D1.4 density class (as per EN 206-1). Former studies have showed that the commonly accepted range of values derived from fresh-state tests on normal weight self-compacting concrete (NWSCC) is also attainable for LWASCC, the majority of whic… Show more
“…Workability is very important for SCLC [35]. Slump flow test and V-funnel test are usually performed to determine the fluidity of SCLC, and L-box test and J-ring test can be used to evaluate the ability of passing through steel bars [31][32][33][34][35][36][37][38][39][40]. Moreover, sieve segregation and settlement column tests are conducted to evaluate the segregation resistance of SCLC [36].…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, self-compacting lightweight concrete (SCLC) has been gradually applied in practical engineering particularly in large-span bridge structures due to the light self-weight, ease of construction, lower on-site noise level, etc. Coarse aggregates used in SCLC often include expanded shale [31], expanded clay ceramsite [32], pumice [33], expanded polystyrene [34], etc. All the coarse aggregates are so light that they may float in the cement paste.…”
“…Workability is very important for SCLC [35]. Slump flow test and V-funnel test are usually performed to determine the fluidity of SCLC, and L-box test and J-ring test can be used to evaluate the ability of passing through steel bars [31][32][33][34][35][36][37][38][39][40]. Moreover, sieve segregation and settlement column tests are conducted to evaluate the segregation resistance of SCLC [36].…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, self-compacting lightweight concrete (SCLC) has been gradually applied in practical engineering particularly in large-span bridge structures due to the light self-weight, ease of construction, lower on-site noise level, etc. Coarse aggregates used in SCLC often include expanded shale [31], expanded clay ceramsite [32], pumice [33], expanded polystyrene [34], etc. All the coarse aggregates are so light that they may float in the cement paste.…”
“…It is known that cork contributes to enhancement of these properties when included in construction materials. Other researchers have produced Lightweight Self Compacting Concrete (LSCC) using different types of lightweight aggregate and a combination of fine materials including cement and ground calcite filler [32,33], flyash [34,35], silicafume [33; 35, 36], glass powder [33] and also filler from recycled old concrete [35].…”
“…Lightweight pumice aggregates have many pores on its surface, as shown in Figure-1. Thus, pumice aggregate coating with a thin cementitious crust appears to increase the workability of pumice aggregate self compacting concrete [9].…”
The porous surface of lightweight aggregate is the main weakness property for producing lightweight concrete. Thus, the filling porous in lightweight aggregate and creating thin layer surrounds aggregate produce stronger lightweight concrete. Therefore, the influence of silica fume and Sika level 100T on the tensile and compressive strengths of lightweight concrete is highlighted in this investigation. For this reason, it was cast and tested 84 lightweight concrete cubes and prisms. It was found that the compressive strength improves up to 22.73% and 34.57% due to inclusion 7.23% of silica fume and 9.6% of Sika level 100T, respectively. While the flexural strength enhances up to 5.4% and 25.72% due to adding 7.23% of silica fume and 9.6% of Sika level 100T, respectively. In addition, the curve fitting software was used in the formulation of the proposed models to verify this improvement and it was found that the proposed model has a good agreement with the test results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.