Abstract
Lightweight concretes have been successfully applied in the building constructions for decades because of their favourable material properties, especially their low specific weight in connection with a high strength, a high capacity of thermal insulation and a high durability. The development leading to light weight self compacting concrete(LWSCC) represents an important innovative step in the recent years. This concrete combines the favourable properties of a lightweight concrete with those of a self compacting concrete. Research work is aimed on development of (LWSCC) with the use of light aggregates ‖Light expand clay aggregate (LECA)‖. In this investigation, first by specific gravity factor method, Twenty different mixes design of (LWSCC) were casted and tested to find out the values of slump flow, G-ring , V-funnel and 28 day compressive strength. Based on the results obtained, the best mix design was selected for further investigation. For the selected mix we study the effect of changing the reinforcement ratio on reinforced two way slabs when the dimensions were kept constant.
Highlights
Lightweight self-compacting concrete (LWSCC) is expected to provide high workability without segregation and high durability with reduced weight
Expanded clay (LECA) and other light weight aggregates such as: expanded shale, pumice, slate, perlite, bottom ash etc. have been successfully used in the production of lightweight concretes (LWCs) over the decades [1,2,3,4,5,6]. Use of these aggregates has contributed to the sustainable development by conserving energy, maximizing structural efficiency and increasing the service life of structural lightweight concrete (LWC)
By the standard mix we study the effect of changing reinforcement ratio of two way slabs reinforced by welded wire mesh with variable diameter of wire
Summary
Lightweight self-compacting concrete (LWSCC) is expected to provide high workability without segregation and high durability with reduced weight. The use of expanded clay aggregate with other quality supplementary cementing materials (such as fly ash and silica fume) can provide highly workable and durable LWSCCs. Expanded clay (LECA) and other light weight aggregates such as: expanded shale, pumice, slate, perlite, bottom ash etc. Sika viscocrete 3425 was used as viscosity enhancing agent (VEA) It contains a polycarboxylic -based copolymer-based mixture and modified cellulose product to achieve the dual action effect of high-range water reducer and viscosity-modifying admixture, respectively.it meets the requirements for super plasticizers according to swiss specification [ SIA 162(2989)] , EUROPE specification [EN934-2] , and American specification [ ASTM- C-494 type G and F ).
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