Deflections Results for Beams of Self Compacted Concrete (SCC) and Normal Concrete for Period t = 400 Days (original) (raw)
Related papers
Development trends for high rise Building or structures, modern skyscrapers request the different workability of fresh concrete to cast in properly way and to achieve the requested results. The many of factors such are: highest of the cast concrete, sections of concrete elements, request the concrete with more plasticity and higher class of consistency, the smaller size of aggregate, the compacted process, etc. The fulfilling the previous condition, using the Self Compacted Concrete is one of the aims in this paper. Considering this fact, researches for deflections, mechanical characteristics of concrete and strains have been conducted worldwide. In this line, we conducted an experimental research to determine the deflections on beams of self-compacted concrete and compared it with conventional concrete. The experimentally-obtained results will be presented for both types of concrete for: module of elasticity and deflections tests for duration testing time t=40 days.
DEFLECTIONS IN BEAMS OF SELF-COMPACTING CONCRETE AND CONVENTIONAL CONCRETE FOR ALONG-TERM PROCESS
The developmental trends of high-rise construction require high-quality concrete because of the large amount of reinforcement in the cross sections of concrete elements. A potential solution for such construction is self-compacting concrete because of its ability to provide support without compaction and vibration. Therefore, studies of concrete deflection, cracking, mechanical characteristics and strain have been conducted worldwide. In this study, we conducted experimental research to determine the strains, deflections and cracks in beams of self-compacting concrete and compared these results to those of conventional concrete over short-and long-term processes. In this paper, we present the experimentally obtained results for both types of concrete, including the deflections, module of elasticity values and compression strength sover a long-term process.
Development trends for high rise constructions, modern skyscrapers are indicating that building of such constructions with normal concretes and low consistency is impossible, therefore there is a need for concrete with high processes because of great amount of reinforcement in cross section of concrete elements. Solution for such construction is self-compacted concrete because of ability to fill good formworks without compaction and vibration. In this line, we conducted an experimental research to determine the mechanical characteristics of concrete, cracks, strains, deflections, strains on long term process and strains at failure test. The experimentally-obtained results will be presented for both types of concrete for: compression strength, splitting tensile strength, strains on concrete and strains on reinforcement for duration failure testing time t = 40 days. .
FLEXURAL BEHAVIOUR OF SELF COMPACTING CONCRETE BEAMS
This paper presents the detailed investigation of the combined effect of the cementitious materials (Fillers) in the fresh and hardened properties of Self Compacting Concrete (SCC). The investigation includes blend of Ordinary Portland Cement (OPC) and Fly ash (FA) in which OPC is partially replaced with certain percentage of FA(25%, 30%, 35%, 40%, 45%).The Control mixture contained Ordinary Portland Cement (OPC) replaced with 20 % of Fly ash (FA) by the weight of OPC. The use of fillers (FA) reduced the hydration in cement and provides cohesion to the concrete. The total binder content of 550 kg/m 3 and water binder ratio of 0.34 were taken as constant for all the mixes. This paper presents the experimental investigation of fresh properties like Slump flow test, L Box, U Box ,V funnel and T 50 time and the Hardened properties in the strength aspects like Compressive strength, Split tensile strength and Flexure strength of beams for all the mixes were compared. Based on the results optimum replacement percentage of FA and flexural behaviour of beams was studied. But the mix with 35%FAexhibits better performance than all other mixes.
Mechanical Characteristics of Self-Compacting Concrete
Self-compacted concrete is a material that recently has been widely used in construction engineering structures and therefore research into its mechanical characteristics is of particular importance as the materials used for its manufacture in terms of quantity differ from composite materials of normal concrete. Based on this we have realized practical proofs for the analysis of these characteristics, which have been carried out according to the respective standards depending on the type of evidence. In this paper, we will present the laboratory results for solidity in printing, Solidity in curvature through cracking, solidity in curvature of curvature prism specimens, concrete precision, velocity of sound penetration in concrete samples, elastic modulus. In the wet concrete phase, self-compacted concrete has a certain number of tests that are not performed on normal concrete, thus we will present laboratory results for L-box, J-ring and V-funnel.
Mechanical and Structural Behavior of Reinforced Self-Compacting Concrete Beam
International Journal of Innovative Research in Engineering & Management (IJIREM), 2023
In this study, the punching shear of slabs and the flexural and shear behaviour of reinforced concrete beams were investigated in connection to the type of concrete (self compacting concrete (SCC) and normal concrete (NC)), and compressive strength (40 MPa). To achieve these objectives, two beam have been furnished, tested, and reviewed. First, one consists of SCC beam and the second one consists of NC beam. We are add admixtures like fly ash and GGBS. According to test results, for beams that failed in flexure, SCC beams showed a similar ultimate load to NC beams. When it came to slender beams collapsing in shear, NC beams showed a 6.75% higher ultimate load than SCC beams for beams , whereas beams with fc' 40 MPa showed nearly the same ultimate load value. The final loads for SCC and NC beams for beams did not differ noticeably. It was discovered that SCC slabs displayed a 17.25% higher ultimate punching shear load than NC slabs for the six geometrically similar slabs (three slabs made with SCC and three slabs made with NC of various concrete strengths) that were intended to fail in punching shear.
Concrete is a material which has found a wide usage in engineering especially in construction engineering and road infrastructure facilities. Development trends for high rise constructions, modern skyscrapers indicate that building such constructions with normal concretes and low consistency is impossible, therefore there is a need for concrete with high processes because of great amount of reinforcement in cross-section of concrete elements. Solution for such construction is self-compacting concrete because of its ability to fill good formworks without compaction and vibration. Considering this fact, researches for cracks, mechanical characteristics of concrete and deformations have been conducted worldwide. In this line, we conducted an experimental research to determine the cracks on beams of selfcompacting concrete and compared it with conventional concrete. The experimentallyobtained results will be presented for both types of concrete for: module of elasticity, compression strength, crack with and cracks spacing for duration failure testing time t = 400 days.
Abstract: Self- Compacting Concrete (SCC) is a special type of concrete that is able to flow and compact under its own weight and can occupy all the spaces in the form without any vibration effect and at the same time cohesive enough to be handled without bleeding or segregation. SCC is a highly flowable concrete which is able to fill the formwork with admixtures such as Fly Ash (FA), Silica Fume (SF), Ground Granulated Blast Furnace Slag (GGBFS), and Metkaolin (MK) etc. There are no standard mix design procedures available for SCC. In the present work, Normal Vibrated Concrete (NVC) and SCC were developed for M30 grade. NVC is designed by using IS code method and SCC is designed by using Nan Su method. Study of SCC with and without mineral admixtures such as SF and FA was made separately at different percentages as 10%, 20%, and 30% respectively by using appropriate dosage of super plasticizers (SP) and viscosity modifying agent (VMA).The workability properties of SCC such as filling ability, passing ability and segregation resistance are evaluated using workability tests such as slump flow, V-funnel and L-Box tests. Strength properties such as compressive strength, split tensile strength and flexural strength of NVC and SCC were also studied. Keywords: The Self-Compacting Concrete (SCC), Normal Vibrated Concrete (NVC), Fly Ash (FA), Silica Fume (SF), super plasticizers (SP). Title: A Comparative Study on Mechanical Properties of Normal Vibrated Concrete and Self Compacting Concrete Author: Asha Deepthi. Deva, Gopala Krishna Sastry. K. V. S International Journal of Civil and Structural Engineering Research ISSN 2348-7607 (Online) Research Publish Journals
A Study on the Flexural Behavior of Plain Cement Concrete with Self Compaction Concrete
International Journal for Research in Applied Science and Engineering Technology (IJRASET), 2021
To study the flexural behaviour of plain cement concrete with self-compaction concrete using three point loading. We are using two different types of concrete (Plain Cement Concrete and Self Compaction Concrete). For this we are using M20 grade concrete. We cast cubes and beams of sizes 150x150x150mm and 150x150x700mm respectively.Based on the test results it is concluded that the flexural strength of the self-compaction concrete beams is more than the plain cement concrete beams. And in the combination also the flexural strength is more when the plain cement concrete layer is at the bottom while the selfcompaction concrete layer is at top. I.
Flexural behavior of self-compacted reinforced concrete beams
Journal of Environmental Studies, 2013
Eight reinforced concrete rectangular beams were designed and tested to study the effect of using selfcompacted concrete (SCC) on the flexural behavior under two concentrated load. All beams have the same longitudinal and vertical steel ratio and gross section area of (150000) mm 2. The tested beams were divided into two groups; the first group consist of four (SCC) beams while the second group consist of four normal strength concrete (NSC). Each group was divided into two series according to clear span to effective depth ratio (ln/d), each series consist of two compressive strength (). It was found that the ultimate and cracking moment capacity predicted from ACI318M-08 is conservative prediction than experimental result for both SCC beams and NSC beams, the beams which made from SCC were more stiffer as compared with the beam which made from NCC with same of the clear span to effective depth ratio, longitudinal steel ratio, vertical steel ratio and relative compressive strength. the experimental ultimate moment capacity and cracking moment predicted from SCC beams were greater than the ultimate moment capacity predicted from NSC beams, , the ultimate load capacity of SCC increased about 28.89%, 25% when the clear span to the effective depth ratio (ln/d) decreased from 10 to 8.4 at compressive strength () 23.81 and 17.9 MPa respectively while the ultimate load capacity of NSC increased about 26.3%, 21.21% when the clear span to the effective depth ratio (ln/d) decreed from 10 to 8.4 at compressive strength () 22.41 and 16.2 MPa respectively, and the ultimate load capacity of SCC increased about 10%, 12.5% when the compressive strength () increased from (17.9) to (23.81) MPa at clear span to effective depth ratio (ln/d) (8.4),(10) respectively while the ultimate load capacity of NSC increased about 14.28%, 15.15% when the compressive strength () increased from (16.2) to (22.41) MPa at clear span to effective depth ratio (ln/d) (8.4),(10) respectively.