scholarly journals Study on Strength Characteristics of Binary Blend Self Compacting Concrete Using Mineral Admixtures

2018 ◽  
Vol 7 (3.12) ◽  
pp. 264
Author(s):  
G J. Prasannaa Venkatesh ◽  
S S.Vivek ◽  
G Dhinakaran
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Rheological Properties ◽  
Mineral Admixtures ◽  
Self Compacting Concrete ◽  
Binary Blend ◽  
Split Tensile Strength ◽  
Slump Flow ◽  
Fresh State ◽  
Hardened State

Self-compacting concrete (SCC) is the flowable concrete which tends to fill the formwork under its weight without external compaction. In the present research, 9 different SCC mixes in binary blend along with control SCC and conventional vibrated concrete (CVC) mixes were developed. In binary combination, cement was partially replaced by SF from 7 to 21%, MK from 10 to 30% and GGBS from 20 to 60%. For the above 9 combinations of SCC mixes, the basic rheological properties test namely slump flow and T500 were carried out in the fresh state of SCC. The flowability was achieved using Superplasticizer and viscosity modifying admixture (VMA), added by the percentage of the weight of cement. In hardened state, the compressive strength of the cube specimens and the split tensile strength of the cylinder specimens were carried out.  

scholarly journals Effect of Glass Fibers on Self Compacting Concrete

2020 ◽  
Vol 170 ◽  
pp. 06018
Author(s):  
Sandeep L. Hake ◽  
S. S. Shinde ◽  
Piyush K. Bhandari ◽  
P. R. Awasarmal ◽  
B. D. Kanawade
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Glass Fibers ◽  
Extreme Condition ◽  
High Dispersion ◽  
Self Compacting Concrete ◽  
Split Tensile Strength ◽  
Glass Fiber Reinforced ◽  
Complex Structural

Self Compacting Concrete (SCC) is a specially developed concrete for concreting under extreme condition of inaccessibility from heights. It is capable to flow under influence of its own weight. It could be used when encountered with dense reinforcement and complex structural design. Problem of segregation as well as bleeding is eliminated and vibration is not required for compaction. As concrete is strong in compression and weak in tension. Hence to make it strong in tension, discontinuous Anti-Crack high dispersion glass fibers are added. SCC mix prepared with addition of discontinuous glass fibers is called as Glass Fiber reinforced Self Compacting Concrete (GFRSCC). In this paper an experimental study has been carried out to check the effect of Anti-Crack high dispersion glass fibers on the compressive strength, split tensile strength and flexural strength of SCC. The result show that, as compared to the Normal SCC, the compressive strength of GFRSCC increases by 2.80% and 12.42%, the split tensile strength of GFRSCC increases by 4.47% and 25.12% and the flexural strength of SCC increases by 6.57% and 14.34% when the Cem-FIL Anti-Crack HD glass fibers were added as 0.25% and 0.50% respectively by the weight of total cementitious material contents. The addition of 0.25% Cem-FIL Anti-Crack HD glass fibers to SCC has not much affect on the workability of Normal SCC. Whereas, addition of 0.50% Cem-FIL Anti-Crack HD glass fibers reduces the workability of SCC.

scholarly journals Flexural, Tensile and Compressibility Behavior of Self Compacting Concrete by using Glass Fibers

2019 ◽  
Vol 9 (2) ◽  
pp. 1094-1098
Keyword(s):  
Aspect Ratio ◽  
Volume Fraction ◽  
Glass Fibers ◽  
Fiber Reinforced ◽  
Self Compacting Concrete ◽  
Split Tensile Strength ◽  
Glass Fiber Reinforced ◽  
Fine Aggregates ◽  
Fresh State ◽  
Hardened State

“Fiber Reinforced Self Compacting Concrete” (FRSCC) is composed of cement, different sizes of coarse and fine aggregates, which integrate with fiber. In this current investigation, M40 grade Self Compacting Concrete reinforced with glass fibers has been developed using the Nan Su method. Fresh state and hardened state properties of Glass Fiber Reinforced Self Compaction Concrete are studied for glass fibers of different aspect ratio (875, 1285 & 1714) and percentage of volume fraction (0, 0.25, 0.5, 0.75 & 1). From the investigation carried out it is found that incorporation of glass fibers of aspect ratio 1285 and percentage of volume fraction 0.5 to SCC attains better compressive and flexural strength compared to other mixtures and also incorporation of glass fibers of aspect ratio 1285 and percentage of volume fraction 0.75 to SCC attains better split tensile strength compared to other mixtures.

Fresh and hardened state performance of self-compacting slag based alkali activated concrete using nanosilica and steel fiber

2021 ◽  
pp. 002199832110323
Author(s):  
Necip Altay Eren ◽  
Radhwan Alzeebaree ◽  
Abdulkadir Çevik ◽  
Anıl Niş ◽  
Alaa Mohammedameen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Aspect Ratio ◽  
Failure Modes ◽  
Steel Fiber ◽  
Specimen Thickness ◽  
Shear Cracks ◽  
Fresh State ◽  
Hardened State ◽  
Alkali Activated

This study investigates the fresh and hardened state performance of slag-based self-compacting alkali-activated concretes (SCAAC) reinforced with steel fibers (SF) and nano-silica (NS), cured at an ambient temperature. Two different hooked-end SF with two fiber volumes and NS were used to examine the combined effect of the SF volume ratio, SF aspect ratio, and NS on the fresh and hardened state performance of SCAAC. In extension, the influence of specimen thickness to steel fiber length (d/FL) ratio on the failure modes of the bending specimens was evaluated. The fresh state properties were evaluated via T50 value, slump flow, V-funnel, and L-Box tests, while the hardened state properties were studied through compressive strength, splitting tensile strength, modulus of elasticity, and flexural tensile strength tests. The relationship analyses were carried out among fresh and hardened state properties, and scanning electron microscopy (SEM) was also conducted to examine the microstructure. The results indicated that fresh state performance was favorably affected by NS inclusion but adversely influenced by SF content and aspect ratio. The hardened state performances enhanced with a higher amount of SF volume and an aspect ratio. Also, the NS improved the splitting tensile and flexural strength but decreased the compressive strength and elasticity modulus of the specimens. The d/FL ratio was found a significant parameter on failure modes, and the specimens having a d/FL ratio of 3.33 showed flexural cracks. In contrast, the specimens having a d/FL ratio of 1.25 exhibited inclined flexural-shear cracks, especially for 1% SF.

Properties and Behavior of Starch Biopolymer Concrete

2020 ◽  
Vol 38 (10A) ◽  
pp. 1414-1420
Author(s):  
Waleed A. Abbas ◽  
Hawraa M. Mohsen
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Corn Starch ◽  
Splitting Tensile Strength ◽  
Natural Polymer ◽  
Mix Proportion ◽  
Fresh State ◽  
Hardened State ◽  
And Behavior

Starch act as natural polymer has been got from Wheat, Tapioca, and Corn. Corn starch has been investigated as biopolymer and has been added to concrete in different percentages (0%, 0.5%, 1%, and 1.5%) by cement weight and the study shows the effect of using starch on some properties of concrete in the fresh state ( slum and fresh density) and at hardened state (compressive strength, splitting tensile strength and flexural strength) at 28 days. The mix proportion was(1:2.3:2.3) (cement: sand: gravel) respectively and at constant w/c equal to 0.47.The results indicate that the optimum percentage of starch addition was 0.5%, so it showed an increase by 50%in compressive strength and splitting tensile strength; while, the increases in flexural strength were 26%. Slump showed a 25% increase and fresh density showed a 2.5% increase at 0.5% addition of starch.

scholarly journals The Influence of the Addition of Fibers on Properties of Self-Compacting Concrete Produced with Recycled Coarse Aggregate

2019 ◽  
Vol 8 (3) ◽  
pp. 5140-5146
Keyword(s):  
Coarse Aggregate ◽  
Environmental Issues ◽  
Mineral Admixtures ◽  
Polypropylene Fibers ◽  
Self Compacting Concrete ◽  
Fresh State ◽  
The World ◽  
Comparable Performance ◽  
Hardened State ◽  
Hardened Properties

All over the world, wide amount of demolishing waste is being generated posing lot of environmental issues. To address these issues, Self-Compacting Concrete (SCC) was made by replacing cement partially with mineral admixtures and NCA with RCA. The fresh and hardened properties for M30 grade of SCC made with NCA and RCA were evaluated. Cement in SCC was recouped partly with 30% Fly Ash, 20% GGBS by weight of the cement. Polypropylene fibers at 0.1% were added to study their influencing nature on the hardened state and fresh state properties of the SCC mix. Four sequences of SCC mixes of M30 were prepared by substituting the NCA with RCA at 25%, 50%, 75% and 100% derived from the dismantled concrete waste of M30 parent grade. SCC produced with the RCA up to 50% and with 0.1% addition of Fibers demonstrated comparable performance as that of SCC with NCA.

scholarly journals Experimental Investigation of Flow and Mechanical Properties of Fibrofor Fiber Reinforced Self-Compacting Concrete

2019 ◽  
Vol 8 (2) ◽  
pp. 8-15
Author(s):  
H. R. Arun Kumar ◽  
B. Shivakumaraswamy
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Volume Fraction ◽  
Working Environment ◽  
Fiber Reinforced ◽  
Self Compacting Concrete ◽  
Split Tensile Strength ◽  
Hardened Properties

Self Compacting Concrete is a material used in the construction that has excellent deformability in the fresh state and high resistance of segregation, and can be replaced and compacted under its self-weight without applying vibration which leads to substantial advantages related to better homogeneity, enhancement of working environment and improvement in the productivity by increasing the speed of construction. Concrete can be formulated with high compressive strength but always has lower tensile strength. Tensile strength and other properties of concrete can be enhanced by adding fibers due to which the workability of concrete mix reduces and in order to achieve the desired Workability super-plasticizers is added. In the present work the use of fibrofor fiber in the production of self-compacting concrete (SCC) has been studied to identify how fresh and hardened properties of SCC are affected by the addition of fibers. The fibrofor fiber of 19mm standard length is incorporated into the SCC mixtures as 0.5kg/m3, 1.0kg/m3, 1.5kg/m3of concrete. Test on fresh SCC like slump Flow test, T50, V-Funnel test, J-Ring slump test and L-Box test were performed for an understanding of flow of SCC and tests on hardened properties like flexural strength, compressive strength and split tensile strength have been conducted to identify the hardened properties of SCC produced with fibrofor fiber. A comparative study between plain concrete, SCC without fiber and SCC with fiber has been done. Mix design for M40 grade concrete has been done according to EFNARC guidelines. The results reveal that the use of fibro for fiber decreases the workability but increases the mechanical properties of SCC. The optimum volume fraction of fibrofor fiber is determined as 1kg/m3 considering the optimized flexural strength and split tensile strength based properties of SCC. Due to increase in strength properties of fiber reinforced SCC that can be used for pavement construction and various other structures such as buildings, water retaining structures, reservoir structures and tunnel etc.

scholarly journals Workability dan Sifat Mekanik Self Compacting Geopolimer Concrete (SCGC)

Jurnal CIVILA ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 267
Author(s):  
Rita Hardianti Aris ◽  
Erniati Bachtiar ◽  
Ritnawati Makbul
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Mechanical Characteristics ◽  
Geopolymer Concrete ◽  
Split Tensile Strength ◽  
Slump Flow ◽  
Flow Test ◽  
Strength Tests ◽  
Compressive Strength Of Concrete ◽  
The Relationship

The purpose of this study was to investigate the relationship between molarity and workability in Self-Compacting Geopolymer Concrete (SCGC), as well as mechanical properties. Compressive strength and split tensile strength tests are used to characterize the mechanical characteristics in this research. Additionally, the study investigates the optimal molarity for self-compacting geopolymer concrete. Fly ash was used in lieu of cement in this research. On new concrete self-compacting geopolymer, workability is determined using the EFNARC standard, which includes the Slump Flow, V-Funnel, and L-Box tests. ASTM 39/C 39M-99 standard is used to determine the compressive strength of self-compacting concrete geopolymer. On new concrete, workability is determined using the EFNARC standard, which comprises the Slump Flow Test, a V-funnel, and an L-Box. The compressive strength of concrete samples is determined according to the ASTM 39/C 39M – 99 standard. The SNI 03-2491-2002 standard is used to determine the split tensile strength of concrete. At the ages of 7, 14, and 28 days, tests were conducted. The findings indicated that new concrete at 11M-13M satisfied the criteria for SCGC workability. The compressive and split tensile strengths of SCGC grow as the concrete ages. In self-compacting geopolymer concrete, the optimal molarity is 13 M.

scholarly journals Behavior of the self-compacting mortar with sugarcane bagasse ash in the fresh and hardened state

2019 ◽  
Vol 12 (1) ◽  
pp. 179-198
Author(s):  
V. C. SANTOS ◽  
R. D. VANDERLEI ◽  
K. K. MORAES ◽  
E. T. D. F. ROSINA ◽  
G. M. BALBINO
Keyword(s):  
Compressive Strength ◽  
Sugarcane Bagasse ◽  
Natural Sand ◽  
Conventional Concrete ◽  
Limestone Filler ◽  
Small Aggregate ◽  
Slump Flow ◽  
Fresh State ◽  
Hardened State ◽  
Sugarcane Bagasse Ash

Abstract Self-compacting concrete (SCC) is a material with high workability and moderate viscosity when compared to conventional concrete. Due to its advantages, the SCC has been investigated in the last decades and the research studies the use of new components in its structure and the search for the improvement of its performance, both in the fluid and in the hardened state. The goal of this study was to evaluate the behavior of self-compacting mortars with limestone filler and with the addition of sugarcane bagasse ash (SBA) partially replacing the small aggregate. To reach this goal, initially, a rate of replacement of natural sand by SBA was set. Afterwards, slump-flow and funnel-V tests were carried out in order to check the behavior of the mortars in the fresh state. After checking the behavior of the mortars in their fresh state, the different mix proportions that achieved the best aspects of fluidity and viscosity was selected, and, for self-compacting mortars, specimens were molded to determine tensile strength at 28 days, and compressive strength at 7 and 28 days. The experimental analyses demonstrated an increase in viscosity and reduction in fluidity with increasing content of limestone filler, facilitating the obtaining of self-compacting mortars. Regarding the performance of the material in the hardened state, the mortars showed a slight increase in tensile and compressive strength due to the filler effect of fines. It was possible to replace 40% of the small aggregate with SBA.

Influence of Ground Clay Brick on the Properties of Fresh and Hardened Self Compacting Lightweight Concrete (SCLC)

2015 ◽  
Vol 1106 ◽  
pp. 57-60
Author(s):  
Sandra Juradin ◽  
Katarina Grbeša
Keyword(s):  
Compressive Strength ◽  
Dynamic Modulus ◽  
Lightweight Concrete ◽  
Visual Assessment ◽  
Clay Brick ◽  
Self Compacting Concrete ◽  
Slump Flow ◽  
Ring Method ◽  
Hardened State ◽  
Box Method

This paper aims to investigate influence of ground cay brick as filler or as aggregate on the workability and compressive strength of self-compacting lightweight concrete. Ground red brick was combined with other additives like: silica fume, stone powder and filler which was obtained by recycling old concrete. For this purpose, several mixtures of self-compacting concrete were prepared and tested. Properties of fresh mixture were determined by slump flow method, visual assessment of stability, T50 time, V-funnel method, L-box method and J-ring method. Also, in hardened state, compressive strengths and dynamic modulus of elasticity after 7 and after 28 days were determined.

scholarly journals Effect of Temperature on the Rate of Gain of Strength of Concrete

2019 ◽  
Vol 8 (6) ◽  
pp. 3906-3911
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Effect Of Temperature ◽  
Strength Parameters ◽  
Split Tensile Strength ◽  
Different Temperatures ◽  
Zero Degree ◽  
Hardened State ◽  
Compressive Strength Of Concrete

This paper presents the effect of temperature on the rate of gain of strength of concrete. Different samples of concrete were cast at different temperatures and various properties of concrete in fresh and hardened state were determined. It was observed that the three strength parameters viz. the compressive strength, the split tensile strength and the flexural strength of concrete are adversely affected when the temperature during first 24 hours is less than or equal to zero degree Celsius. The compressive strength of concrete was determined using 100mm and 150 mm cubes and a comparison was made between the two. It was observed that the strength of 100 mm cubes was greater than that of 150 mm cubes. Later a relationship was developed between 7 days,14 days and 28 days strength.

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