According to the test results, the size effect in the concrete strength was closely related to the ratio of the diameter of specimen to that of aggregate (D/d). The compressive strength of river sand and gravel concrete and glass ball concrete increases with the increase of the size of specimen provided that the value of D/d is smaller than ...

False strength of concrete proves fatal as it may fail due to various factors in the long terms. Therefore, to ensure the functional performance and safety of structure it is necessary to determine the true strength of concrete. In this project the effect of high rate of loading on compressive strength of concrete has been studied. As it has

Keywords: compressive strength; flexural strength; stress concentration. Date: 3/1/2000. Abstract: In estimation of the ultimate strength of a concrete flexural member, the effect of member size is usually not considered. For various types of loading, however, the strength …

Effect of shape of the specimen on the compressive strength of concrete has been widely studied and different relationships have been proposed between the cube compressive strength and cylinder strength. As per Indian Standards 150mm cubes are used for determining the compressive strength of concrete. Use of I00 mm cubes has its advantages.

The crushing strength of concrete at temperatures up to 600°C was independent of the water/cement ratio used but was influenced by the aggregate/cement ratio. Concrete specimens loaded to produce normal design compressive stress during the period of heating showed less reduction in strength than specimens without imposed load.

Highest compressive strength was achieved from concrete containing crushed quartzite, followed by concrete containing river gravel which indicated that aggregate type also has effect on the ...

The use of RCA did not have a significant effect on the rate of concrete compressive strength or stiffness gain, but it did have a small effect on the strand bond strength. For the materials tested, RCA from precast concrete performed better than RCA from returned ready-mixed concrete and demolished concrete…

11/11/2014· For m2, compressive strength is increased to 50.15 MPa, it also showed an increase in compressive strength. Compressive strength of m3 is decreased to 49.3 MPa that showed a decrease n compressive strength. So the results of test show that compressive strength does not follow a regular trend from m0 to m3.

Vilane et al. (2016) studied the effect of aggregate size on the compressive strength of concrete. The experiment had three treatments, which were the aggregate sizes (9.5 mm, 13.2 mm and 19.0 mm ...

Abstract- The paper deals with the effects of addition of various proportions of polypropylene fiber on the properties of high strength concrete m20 mixes.An experimental program was carried out to explore its effects on compressive strength under different curing condition. the main aim of the investigation program is to study the effect of ...

The study present the effect of different curing methods on the compressive strength of concrete using Portland cement and finally identifies the most effective curing process for normal concrete. MATERIALS AND METHODS Locally available crushed granite stones and fine aggregate (quartzite sand)were used as coarse and fine aggregate respectively.

Curing also plays an important role in achieving compressive strength of the concrete. It wa s also discussed that how curing in water and air affects the compressive strength of the concrete. The methodology included 3 different design mixes o f concrete. The tests were conducted on all the 3 different types of design mixes concrete.

CD06-011 EFFECT OF REBAR ON COMPRESSIVE STRENGTH OF CONCRETE CORES M. Tadayon1, H.T.P Moghadam2, M.H. Tadayon3 1Associate professor, Civil Eng. Dept., Engineering Faculty, Bu-AliSina University, Hamedan, Iran 2Graduate of Iran University of Science and Technology Civil Engineering Faculty, Tehran, Iran 3M.S. Student, Dept of civil Eng., Engineering Faculty, …

3/3/2015· The impact of calcium chloride admixture on the compressive strength of concrete made from these brands of cement was compared with the compressive strength of concrete without calcium chloride. Sieve analysis, natural moisture content and specific gravity tests were carried out on the aggregates used in the production of the concrete and the ...

"Effect Of Salt Water On Compressive Strength Of Concrete"

The compressive strength and velocity are dependent, i.e. as the compressive strength increases the velocity also increases or as the velocity increases the compressive strength increases. The Geopolymer binder may be treated as future environment friendly alternative to Portland cement in certain industrial applications. References

effect of aggregate Flakiness on the Compressive strength of Concrete Cubes 29 with concrete made from quartzite aggregate tracked by river gravel and then granite aggregate. Compressive strength models were proposed as a function of age at curing. Where concrete practitioners have options, aggregate made

The particle size of silica fume is 100 times smaller than cement particles i.e. its fine as cigarette smoke. Its a highly effective pozzolanic material, which improves the properties of concrete such as improved compressive strength, bond strength, abrasion resistance, dense concrete that results in protection of reinforcement against corrosion.

Compressive Strength The main measure of the structural quality of concrete is its compressive strength. This property of concrete is commonly considered in structural design. Depending on the mix (especially the water-cement ratio) and time and quality of the curing, compressive strength of concrete can be obtained up to 14,000 psi or more. Commercial production of concrete with ordinary ...

The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete. ... The compressive aggregate strength is an important factor in the selection of ...

Using higher number of fines modulus without decreasing amount of mixing water, decrease the compressive strength of concrete. Shape And Size Effect On Concrete Strength. Aggregates shape and size has a strong influence on properties of concrete. Rough surface textured particles increase the compressive strength of concrete up to 20-30% ...

[2] J.J. Brooks, M.A. MegatJohari, M. Mazloom "Effect of Admixtures on the Setting Times of High-Strength Concrete" Cement & Concrete Composites 22 (2000) 293-301. [3] Vilas V. Karjinni and Mushtaq Ahmed Bhavikatti "Effect of Non-Chloride Hardening Accelerator on the Compressive and Flexural Strengths at Early and

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