STUDY ON THE TEST METHOD FOR COMPACTABILITY OF FRESH CONCRETE

It has been reported that, depending on the material used, batches of concrete having the same slump value behave differently when vibrated. It is therefore to be expected that batches of concrete having the same slump value and containing the same amount of powder will have different properties depending on the material used. However, these batches of concrete are treated as concrete of the same quality since, at present, no alternative test method has yet been established as a substitute for the slump test. This study proposed new simplified experimental methods for vibration properties of fresh concrete. By using these methods, the vibration characteristics of fresh concrete containing fly ash (FA) and containing a large amount of cement were exhibited.

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Advances in Research on Correlation of Workability and Rheology of Fresh Concrete: A Review

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.405-406.77 ◽

2009 ◽

Vol 405-406 ◽

pp. 77-82

Author(s):

Gai Fei Peng ◽

Zhan Qi Guo ◽

Piet Stroeven ◽

Ri Gao ◽

Guang Hua Huang

Keyword(s):

Literature Review ◽

High Performance ◽

High Performance Concrete ◽

Fresh Concrete ◽

Experimental Tests ◽

Test Method ◽

Future Research ◽

Specific Method ◽

Self Compacting Concrete ◽

The Relationship

A literature review was carried out to identify advances in research on workability of fresh concrete via both experimental tests and modeling, especially high performance concrete and self-compacting concrete. It is concluded that, in order to achieve better understanding of fresh concrete, especially self-compacting concrete (SCC) and high-performance concrete (HPC), a clear methodology of research should be established as the first step. It is suggested that there is no unique workability test method suitable for all the range of fluidity of fresh concrete, and a specific method should be identified for a proper range of fluidity. As to the relationship between fluidity of concrete and that of paste, future research can be conducted in two aspects, i.e. one is the influence of the quantity of paste in concrete, and another is the influence of fluidity of paste affected by a couple of factors.

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A Test Method to Measure the Freeze Thaw Durability of Fresh Concrete Using Overpressure

T&DI Congress 2014 ◽

10.1061/9780784413586.008 ◽

2014 ◽

Cited By ~ 2

Author(s):

M. Tyler Ley ◽

Bradden Tabb

Keyword(s):

Fresh Concrete ◽

Test Method ◽

Freeze Thaw

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Effect of Nanomaterial on the Properties of Ultra High Performance Concrete

Iraqi Journal of Industrial Research ◽

10.53523/ijoirvol8i2id76 ◽

2021 ◽

Vol 8 (2) ◽

pp. 1-10

Author(s):

Nada Mahdi Fawzi Aljalawi

Keyword(s):

High Performance ◽

High Performance Concrete ◽

Fresh Concrete ◽

Concrete Strength ◽

Cement Industry ◽

Test Method ◽

Limestone Powder ◽

Negative Effects ◽

Ultra High Performance Concrete ◽

Powder Lead

In recent years, there is a great interest in many countries to use the limestone powder in produce concrete by the replacing it as a proportion of cement weight able to improving the properties of the concrete as well as this type of powder lead to the reducing concrete cost and the CO2 emissions through the process of cement industry. This study examined of the effect of the limestone powder indifferent proportion (5, 10, 15, and 20) % replaced by the weight of cement on the properties of Ultra High Performance Concrete). Where it included five tests consisted of workability of fresh concrete (slump test method), compressive strength, tensile strength, water absorption, and density. The Results show the possibility of replacing 15% of the cement weight with limestone powder lead to improving of concrete strength but negative effects on the properties observed as the amount of limestone powder exceeds this ratio.

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Determining the Rheological Properties of Fresh Concrete using Concrete Shear Box

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a9345.109119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 351-360

Keyword(s):

Rheological Properties ◽

Research Study ◽

Fresh Concrete ◽

Relative Yield ◽

Test Method ◽

Portland Cement Concrete ◽

Test Device ◽

Model Study ◽

Repeatability And Reproducibility ◽

Shear Box

A test method which is accurate, viable and is based on the fundamental scientific description and at the same time the results are independent of the test device can go a long way in better understanding of the workability of fresh concrete. The principal objective of this research study is to assess the feasibility of concrete shear box to measure the rheological properties of fresh Portland cement concrete using Bingham model. Study assesses the repeatability and reproducibility of the results. The repeatability values of relative yield stress and relative plastic viscosity are 97.63% and 91.49% and reproducibility values are 91.68% and 95.51% respectively and the results reinforce the effectiveness of using concrete shear box.

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A new test method to characterize the pressure-dependent shear behavior of fresh concrete

Construction and Building Materials ◽

10.1016/j.conbuildmat.2019.117255 ◽

2020 ◽

Vol 233 ◽

pp. 117255

Author(s):

Tilo Proske ◽

Moien Rezvani ◽

Carl-Alexander Graubner

Keyword(s):

Fresh Concrete ◽

Shear Behavior ◽

Test Method

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Study on Workability High Strength Concrete Containing Pineapple Leaf Fiber (PALF)

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1200/1/012006 ◽

2021 ◽

Vol 1200 (1) ◽

pp. 012006

Author(s):

J. Hadipramana ◽

F. V. Riza ◽

T. Amirsyah ◽

S.N. Mokhatar ◽

M. Ardiansyah

Keyword(s):

High Strength Concrete ◽

Fresh Concrete ◽

Concrete Strength ◽

High Strength ◽

Test Method ◽

Concrete Mixture ◽

Sieve Analysis ◽

Strength Concrete ◽

Pineapple Leaf Fiber ◽

Leaf Fiber

Abstract The addition of fibers in concrete increases bridging force in interfacial transition zones inside the concrete matrix. Pineapple Leaf Fiber (PALF) is a natural fiber that has the potential to replace artificial fibers as reinforcement on concrete. As reinforcement fiber in concrete, PALF will undergo fibrillation and water absorption in concrete mixture and will change the mechanical properties of fresh concrete. So, the purpose of this study is to study the workability characteristics of fresh state concrete given PALF. Some variations of PALF composition are 0.04, 0.09, and 0.15 % wt. of cement is mixed into fresh concrete mixture with water-cement (w/c) ratio variations of 0.35, 0.38, and 0.41. The planned concrete is high-strength concrete, then the provisions of determination of coarse and fine aggregates using sieve analysis according to high-strength concrete material standards and concrete mixtures are given superplasticizer 0.09% wt. of cement constantly for all mixtures. A slump test method is still an option in this study, where this method becomes the standard to determine workability effectively. The results showed that an increase in concrete strength was achieved in the addition of PALF composition in concrete compared to control (normal concrete), in addition to the tendency of the relationship between w/c ratio, slump value, and compressive strength in all PALF variations achieved in this study.

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