Assessment of the fresh selfcompacting concrete properties utilizing different types of additives

Abstract

self-compacting concrete (scc) is characterized by unique workability properties. stagnation or segregation of scc must be avoided to obtain a homogenous and stable mixture. When scc is produced, it is essential that the concrete has all the adequate fresh properties at the time of placement. For a successful and reliable application of scc, the predication of scc fresh state properties is of crucial importance. this predictability is determined by the sensitivity of the rheological properties towards the affecting parameters in the mixture composition. experimental work was conducted to clarify the effects of the volumetric water to powder ratio and additives on the behavior of scc from the rheological point of view. therefore, the aim of this paper is to analyze the effect of different types of additives and paste contents on the fresh state response of scc; powder type. it was found that the additives can greatly influence the concrete workability. Along that, an extension of the workability window of scc is updated according to the acceptance criterion for.

Fresh properties of the selfcompacting high-performance concrete using recycled concrete aggregate

“…Processing window is a window created by mainly two coordinates, those coordinates are the slump flow (mm) in the x-axis and V-funnel time (s) in the y-axis, which could help to assess and limits the targeted values based on the upper and lower limits of the slump flow and for the V-funnel time tests. Some modifications have been suggested on the limited ranges EFNARC by a number of researchers who they investigated the fresh properties of SCHPC [16,17]. However, in the present study the suggested window EFNARC tested for its applicability in case of using RCA in the SCHPC.…”

“…The ability of concrete to remain uniform during and after placement without any loss of stability due to bleeding, mortar separation and coarse aggregate settlement is the segregation resistance [12]. Choosing better grading of aggregates, decreasing the maximum aggregate size, using cementing materials with cement, and decreasing the w/b ratio enhances the segregation resistance [16,17], where in case of SCHPC the low segregation resistance decrease the durability of concrete [18].…”

Assessment of Thermal and Mechanical Properties of Cement-Based Materials—Part 2: Perlite Concrete

“…Perlite, a naturally occurring alumino-siliceous amorphous volcanic material derived from crude perlite rock, is commonly used in construction and is found in various countries, including Italy, Hungary, Turkey, Greece, Japan, and the United States [5][6][7]. The global production of perlite is increasing, driven by rising demand.…”