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transverse reinforcement, the compressive strength of concrete, the spacing of hoops, the longitudinal reinforcement, hoop pattern. During earthquakes the failure in columns may occur due to poor or improper confinements see figure-18. In India and some other countries it is a practice to tie the compression members

Get PriceIn general, strength of concrete means compressive strength and flexure strength.In both cases, load is applied on concrete specimen at certain rate and applied until failure occurs. The range of usual speeds that are applied has significant effect on apparent strength of specimen.

Get Price[]### EFFECT OF CRUDE OIL CONTAMINATION ON THE

EFFECT OF CRUDE OIL CONTAMINATION ON THE COMPRESSIVE STRENGTH OF CONCRETE S. O. Osuji & E. Nwankwo Nigerian Journal of Technology, Vol. 34, No. 2, April 2015 260 drink and use for all their requirements. In April 1997, samples taken from water used for drinking and

Get Price[]### Effect of Rate of Loading on Compressive Strength of

In this project the effect of high rate of loading on compressive strength of concrete has been studied. As it has been observed that strength increases at higher rate of loading, it gives false strength which may prove hazardous. To avoid this, a suitable correction factor has been formulated which will enable us to obtain the true strength of concrete. II.

Get Price[]### Compressive strength of concrete after early loading

about 5% higher [compressive strength] for hand-rodded concrete, than that of companion unloaded cylinders . Abdel-Jawad and Haddad (1992) carried out tests which were similar to those reported here and concluded that loading concrete, beyond 8 h of casting, up to 90% of its compressive strength [at time of loading] has no effect on the strength of

Get PriceA Comparitative Study of Compressive Strength and Split Tensile Strength on Effect of Size of Coarse Aggregate in Hybrid Fiber Reinforced Concrete with Different Grades written by V. Naga Kalyani, K. Hari Krishna, A. Naga Sai published on 2017/06/10 download full article with reference data and citations

Get PriceDependence of compressive strength on mix parameters. The w/c is the single most important factor governing the strength of concrete. High w/c implies high porosity, and thus lowered strength. The trend shown in Figure 1 for the dependence of compressive strength on the w/c is

Get PriceOct 28, 2013 · Specified concrete compressive strength is the minimum compressive strength at which the concrete should fail in standard tests of 28-day-old concrete cylinders. A typical concrete compressive strength specification requires 4,000 to 5,000 psi at 28 days.

Get Price[]### Effect of Cold Joint on Strength Of Concrete

Table 2. Test results for compressive strength of fresh concrete Table 3. Test results for compressive strength of stained normal concrete Sr. No Failure Time lag, (min) (m Compressive strength of concrete, N/mm2 Full cube Diagonal Plane Plane Vertical Failure PlanePlane Horizontal Plane 1 0 34.84 34.84 34.84 34.84

Get PriceThe UPV measurement and compressive strength tests were carried out at the concrete age of 28 days. The experimental results show that the relationship between UPV and the compressive strength of concrete is significantly influenced by the coarse aggregate content.

Get Price[]### Effect of Cement-Water Ratio on Compressive

The compressive strength of concrete is determined by performing compression test on standard sizes of concrete either cubes or cylinders. The proportions of concrete affect partly the strength of concrete, however, water-cement ratio consider the most important factor affecting the strength of concrete [3].

Get Price[]### Compressive strength of concrete after early loading

Construction Materials Compressive strength of concrete after early loading Claisse and Dean 2. used on the displacement readings to account for machine stiffness. The specimens loaded to failure were loaded until a drop of 50 kN strength was recorded; this was to accommodate local failures in specimens.

Get PriceLaterized concrete is defined as concrete in which laterite fines replace sand. A previous paper highlighted only the salient points of difference between laterized and normal concrete. The results reported in this paper are mainly on the effect of water content on the compressive strength of laterized concrete.

Get Price[]### Impact of clay particles on concrete compressive strength

Compressive strength after 28days. Figure 5. Concrete compressive strength decrease at the age of 3 days. compressive strength is 11.16%. iv. When the clay content in aggregates is 7% the loss of compressive strength is 14.39%. v. When the clay content in aggregates is 10% the loss of compressive strength is 18.08%.

Get PriceThat tensile strength is the basis for its ability to resist bending, or its flexural strength. ACI 207R, Effect of Restraint, Volume Change, and Reinforcement on Cracking of Mass Concrete, states in Chapter 3 that concrete's tensile strength is often taken as 6.7 times the square root of its compressive strength. It also notes that where a conservative estimate is in order, you can use a minimum tensile strength of 4

Get PricePublished in American Journal of Civil Engineering and Architecture · 2017Authors Bayan Alnuman · Bestoon R Aziz · Sabr A Abdulla · Sirwan E KhaleelAffiliation Ishik UniversityAbout Nondestructive testing### Hardened Concrete Strength

Tensile strength of concrete. Generally, the tensile strength is only 1/10 to 1/7 of the compressive strength. Three methods are commonly used to determine the tensile properties Direct tension, Split tension, and Flexure. The direct tension method is the most accurate for measuring the tensile response of

Get Price[]### Effect of moisture content on compressive and split

that the moisture content in concrete does have a significant effect on the compressive strength of concrete, but has a much lesser effect on the split tensile strength. As the specimen degrees of saturation increased, the compressive strength fell. However, at nearly saturated condition, an increase in compressive strength can be found.

Get Price[]### Effect of Cube Size on the Compressive Strength of

Compressive strength of concrete can be determined using different shapes of specimens. Most commonly used specimens are cylinders and cubes. In United States compressive strength of concrete is determined by applying compressive force on cylindrical specimens of

Get Price[]### The Effect of Maximum Coarse Aggregate Size on the

The Effect of Maximum Coarse Aggregate Size on the Compressive Strength of Concrete Produced in Ghana Anthony Woode* David Kwame Amoah Issaka Ayuba Aguba Philip Ballow Department of Civil Engineering, Accra Polytechnic, P.O.Box 561 Accra, Ghana *Email of Corresponding Author [email protected] Abstract

Get Price[]### The Effect of Aggregate Size on The Strength of Concrete

size can achieve compressive strength up to 160 Mpa at 28 days [3]. Mineral content in coarse aggregate also influence to the bond strength of the aggregate-concrete mix. Normal concrete compressive strength at 28 days for the granite aggregate is 30 MPa [4]. Aggregate shape and texture can help to improve the strength of concrete. Spherical shape suitable

Get PriceAbdullahi M. Effect of Aggregate Type on Compressive Strength of Concrete. International Journal of Civil and Structural Engineering, 2(3), 2012, pp 791-800. DOI 10.6088/ijcser.00202030008. Neetu and Rabbani A. Influence of size of aggregates on the Compressive strength of concrete.

Get Price[]### Effect of Specimen Size and Shape on the Compressive

Keywords High strength concrete, compressive strength, size effect, shape effect INTRODUCTION In Saudi Arabia concrete is the dominant construction material for all types of buildings and other structures. Most of the structural concrete elements are made with a compressive strength of20 to 35 MPa. Lately, there is an increase

Get Price[]### EFFECT OF SPECIMEN SIZE AND SHAPE ON

EFFECT OF SPECIMEN SIZE AND SHAPE ON COMPRESSIVE STRENGTH OF SELF-COMPACTING CONCRETE Diyala Journal of Engineering Sciences, Vol. 07, No. 02, June 2014 17 expected that the strengths of cubes and cylinders made from the same concrete differ from one another (2).

Get PriceDependence of compressive strength on mix parameters. The w/c is the single most important factor governing the strength of concrete. High w/c implies high porosity, and thus lowered strength. The trend shown in Figure 1 for the dependence of compressive strength on the w/c is

Get Price[]### EFFECT OF SPECIMEN SIZE AND SHAPE ON

EFFECT OF SPECIMEN SIZE AND SHAPE ON COMPRESSIVE STRENGTH OF SELF-COMPACTING CONCRETE Diyala Journal of Engineering Sciences, Vol. 07, No. 02, June 2014 17 expected that the strengths of cubes and cylinders made from the same concrete differ from one another (2).

Get Price[]### The Effect of Capping Condition on the Compressive

effect of capping and capping materials on the compressive strength of Concrete hollow blocks, while the effect of cylinder end condition prior to capping on strength test results has been reported by

Get Price[]### EFFECT OF REBAR ON COMPRESSIVE STRENGTH OF

966 / Effect of Rebar on Compressive Strength . Cores and Sawed Beams of Concrete" (ASTM C 42) shall be permitted [1,3,4]. If by structural analysis, again it

Get PriceNov 08, 2017 · EFFECT ON COMPRESSIVE STRENGTH OF CONCRETE BY USING WASTE RUBBER AS PARTIAL REPLACEMENT OF FINE AGGREGATE A Review Aniruddh1, Mr. Abhishek Kumar2, Mohd. Afaque Khan3 1.

Get PriceDec 24, 2014 · Introduction The aim of this study was to evaluate the compressive strength of calcium-enriched mixture (CEM) cement in contact with acidic, neutral and alkaline pH values. Methods and Materials The cement was mixed according to the manufacturer's instructions, it was then condensed into fourteen split molds with five 4×6 mm holes.

Get PriceMay 06, 2017 · Effect of Elevated Temperature on Concrete Strength Concrete structures could be exposed to high temperatures due to different reasons, mainly during exposure to fire; another one could be when the structure or its elements are a part of industrial installations.

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