Estimating strength properties of self-compacting concrete incorporating cementitious materials based on ultrasonic waves

2020 ◽  
Author(s):  
Khalid M. Breesem ◽  
Manal M. Abood ◽  
A. B. M. A. Kaish
Keyword(s):  
Cementitious Materials ◽  
Strength Properties ◽  
Ultrasonic Waves ◽  
Self Compacting Concrete

scholarly journals The Strength Behavior of Self-Compacting Concrete Incorporating Bottom Ash as Partial Replacement to Fine Aggregate

2015 ◽  
Vol 773-774 ◽  
pp. 916-922 ◽  
Author(s):  
Norul Ernida Zainal Abidin ◽  
Mohd Haziman Wan Ibrahim ◽  
Norwati Jamaluddin ◽  
Kartini Kamaruddin ◽  
Ahmad Farhan Hamzah
Keyword(s):  
Bottom Ash ◽  
Cementitious Materials ◽  
Strength Properties ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Replacement Level ◽  
Self Compacting Concrete ◽  
Split Tensile Strength ◽  
Natural Sand ◽  
Set Up

Self-compacting concrete which commonly abbrevited as SCC is a special concrete that have the ability to consilodate fully under its own self-weight without any internal or external vibration. This paper presents the experimental investigation carried out to study the strength of self-compacting concrete incorporating bottom ash at different replacement level of natural sand. The composite cement was used and the replacement level of bottom ash to natural sand is set up to 30% by volume. The strength properties such as compressive strength, split tensile strength and flexural strength of the concrete at the age of 7 and 28 days of curing day were conducted. Results shows that the strength of the concrete with bottom ash increased up to replacement level 15% higher than control specimens. This show that bottom ash can be used as supplimentary cementitious materials, having the pozzolanic reactivty.

scholarly journals Experimental Researchon Flow and Strength Properties of Blended Fibre Reinforced Self Compacting Concrete

2019 ◽  
Vol 8 (6S4) ◽  
pp. 151-155
Keyword(s):  
Compressive Strength ◽  
Aspect Ratio ◽  
Considerable Increase ◽  
Mechanical Vibration ◽  
Strength Properties ◽  
Single Fiber ◽  
Moderate Increase ◽  
Fiber Reinforced ◽  
Self Compacting Concrete ◽  
Split Tensile Strength

Self compacting concrete achieves compaction by itself without using mechanical vibration techniques. Addition of fibers to SCC results in increased performance mainly in flexure, and also in compressive strength. In this study both the flow and strength properties of single Fiber and blended fiber reinforced self compacting concrete are examined in comparison with control self compacting concrete. crimpled steel fibers having size of 0.45mm diameter x 12.5mm length (aspect ratio 27.7) and 0.45mm diameter x 20 mm length (aspect ratio 44.44) are used in the SCC mix at various percentages by weight of cement i.e. 0%, 2%, 4% and 6%. From the obtained results it can be seen that there is aadverse affect on flow properties. There is a moderate increase in the compressive strength, split tensile strength and considerable increase in the flexural strength of the self compacting concrete using the blended fibers at different percentages i.e. at 2% and 4%, when compared to the single fiber reinforced self compacting concrete.

Rheological and strength properties of self-compacting concrete incorporating marble and granite powders

2020 ◽  
Vol 32 ◽  
pp. 1005-1013
Author(s):  
Miss Meera ◽  
Anuj ◽  
Ashish Kumar Dash ◽  
Supratic Gupta
Keyword(s):  
Strength Properties ◽  
Self Compacting Concrete

Suitability of Cordia millenii Ash Blended Cement in Concrete Production

2016 ◽  
Vol 22 ◽  
pp. 59-67 ◽  
Author(s):  
Olusola Emmanuel Babalola ◽  
Paul O. Awoyera
Keyword(s):  
Compressive Strength ◽  
Setting Time ◽  
Blended Cement ◽  
Cementitious Materials ◽  
Strength Properties ◽  
Supplementary Cementitious Materials ◽  
Sieve Analysis ◽  
Concrete Production ◽  
Alternative Materials ◽  
Concrete Control

Supplementary cementitious materials are most needed to enhance a sustainable development in poor communities. It is pertinent to investigate the suitability of such alternative materials for construction. The present study evaluates the strength characteristics of concrete made with varied proportion of Cordia millenii ash blended with Portland cement. Chemical composition of Cordia millenii and the setting time when blended with cement was determined. Other laboratory tests performed on Cordia millenii blended cement include: sieve analysis and specific gravity. Five replacement percentages of Cordia millenii (5%, 10%, 15%, and 20%) were blended with cement in concrete. Control specimens were also produced with only cement. Tests to determine the workability, air entrained, bulk density and compressive strength properties of the concrete were also conducted. Results obtained revealed that optimum Cordia millenii mix is 10%, which yielded the highest density and compressive strength in the concrete.

scholarly journals Self Compacting Concrete – an Analysis of Properties using Fly Ash

2018 ◽  
Vol 7 (2.24) ◽  
pp. 135
Author(s):  
Dasarathy A K ◽  
M Tamil Selvi ◽  
D Leela ◽  
S Kumar
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Cementitious Materials ◽  
The Self ◽  
Experimental Program ◽  
Reinforcing Bars ◽  
Self Compacting Concrete ◽  
Construction Market ◽  
Class F Fly Ash ◽  
Class F

Self  compacting concrete has ability involves not only high deformability of paste or mortar, but also resistance to segregation between coarse aggregate and  mortar  when the concrete flows  through the confined zone of reinforcing bars. Several researchers have employed the different methods to achieve self- compactability. In recent years, self-compacting concrete (SCC) has gained wide use for placement in congested reinforced  concrete structures with difficult casting conditions. For such applications, the fresh concrete must possess high fluidity and good cohesiveness. The initial results of an experimental program aimed at producing and evaluating SCC made with high volumes of fly ash are presented and discussed. Nine SCC mixtures and one control concrete were investigated in this study. The content of the cementitious materials was maintained constant (400 kg/m3), while the water / cementitious material ratios ranged from 0.35 to 0.45. The self-compacting mixtures had a cement replacement of 40,50 and 60% by Class F fly ash. Tests were carried out on all  mechanical properties of hardened concretes such as compressive strength were also determined. The self-compacting concretes developed a 28- day compressive strengths ranging from 26 to 48 MPa. The results show that an economical self-compacting concrete could be successfully developed by incorporating high-volumes of Class F fly ash. The present project investigates the making of self-compacting concrete more affordable for the construction market by replacing high volumes of Portland cement by fly ash. The study focuses on comparison of fresh properties of SCC containing varying amounts of fly ash with that containing commercially available admixture. Test result substantiate the feasibility to develop low cost SCC using Class F fly ash.  

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