This study considered the effect of different methods of curing on density and compressive strength of concrete. Concrete cube specimens of mix 1:2:4 were prepared with water-cement ratio of 0.65. The cubes were cured using six methods (air curing, water-submerged curing, spray curing, polythene curing, moist sand curing and burlap curing) until testing …
In this CDP model, the stress-strain curves in compressive behavior and tensile behavior during the softening phase (after stress reaches peak strength) consider the effect of mesh size in Finite Element model. Through recently published results, these curves show many advantages compared to the previous studies.
81 concrete prism specimens under axial compression were tested to invesgigate the size effect on the axial load stength. Three different kinds of specimens with the dimension 100×100×300mm, 150×150×300mm, 200×200×400mm were tested. The parameters including compressive strength of concrete and aggregate composition …
This paper detailed the importance of and benefits of admixtures on concrete. It is utilized as an admixture in the concrete blend and show significant effects on the properties of the material.
While traditional concrete normally has a compressive strength ranging anywhere from 2,500 to 5,000 psi, UHPC can have a compressive strength of up to 10 times that of traditional concrete. After just 14 days of curing, UHPC has a compressive strength of 20,000 psi.
This study reports the laboratory results of the effect of curing methods on the compressive strength as well as the density of concrete. A total of 72 cubes of mix ratio 1:2:4 were investigated ...
The compressive strength of the concrete cube test provides an idea about all the characteristics of concrete. By this single test one judge that whether Concreting has …
The compressive resistance of concrete in new structures is usually characterized on the basis of tests performed on concrete cylinders or cubes under relatively rapid loading …
The quality of these material components-cement, aggregates, admixtures, and water-holds significant influence over the physical and strength attributes of concrete [1] [23].
The compressive strength of concrete depends on factors such as water-cement ratio, cement strength, quality of coarse and fine aggregate materials, quality control during the production of concrete, etc.
Thus, increase in number of voids decreases the compressive strength of concrete. Thus it is important to balance the strength and workability requirement for concrete work.
The dynamic increase factor (DIF) of the concrete material strength, obtained using a split Hopkinson pressure bar (SHPB), includes structural effects that do not precisely reflect the real strain-rate effect of concrete. To further clarify the real strain-rate effects of rubberised concrete (RC), an experimental investigation regarding the …
This work investigated the effect of clay on the compressive strength of concrete. A total number of 36 concrete cubes of 150 mm were cast, cured, and crushed.
In this research paper, effect of textile waste on compressive strength of concrete cubes are analyzed.
These results suggest two important points in terms of estimating the characteristic compressive strength of concrete as follows: 1-. In this framework, the asymptotic strength σ ∞, which is by construction independent of system size, appears as the genuine characteristic compressive strength of concrete; 2-.
The compressive strength of concrete refers to how many pounds per square inch (psi) it can handle when force is applied. It is a reliable indicator of how it will perform under heavy loads or internal pressures caused by freeze-thaw cycles. Understanding what the different psi ratings mean is essential for specifying the right …
The compressive strength of the concrete cube test provides an idea about all the characteristics of concrete. By this single test one judge that whether Concreting has been done properly or not. Concrete compressive strength for general construction varies from 15 MPa (2200 psi) to 30 MPa (4400 psi) and higher in commercial and industrial structures.
To include this effect, Fracture-toughness tests were conducted on different concrete mixtures, including those with different aggregate types and proportions, with the same compressive strength at the time of testing.
Concrete is one of the most commonly used materials in construction engineering, and its compressive strength is an important reference index for structural design and construction. As a ...
DOI: 10.14359/11850. Date: 4/1/1953. Abstract: The effect of the rate of application of load was investigated using bonded wire strain gages in compressive tests of two concretes having approximate compressive strengths of 2500 and 6500 psi. The concrete was tested in the form of 3 x 6-in. cylinders at rates of straining ranging from 10-^6 to ...
The test cylinders were left for 7, 14, 21 and 28 days for curing. After curing, the compressive strength was measured on hardened concrete cylinders accordingly.
In the study conducted by Shoukry, et al. [48] who studied the effects of elevated temperatures on the compressive and tensile strength of concrete. They developed a formula for predicting the relationship between compressive and tensile strength of concrete at elevated temperatures.
Concrete compressive strength is an important indicator to deterioration resistance since the increase of cement content and the reduction of w/c ratio improves the compressive …
Hence in this experimental study, the behavior of coconut fibre on the compressive strength of concrete was analyzed by partially replacing the cement with CF (2%, 3.5%, 5%).The cubes are tested ...
Concrete structures are subjected to loadings which can be static or dynamic and in most cases, both. Deeper understanding on how concrete behaves to different modes of loading needs to be assessed, particularly the rate; and to study its effects, a property of concrete such as its compressive strength requires to be examined in …
The hollow concrete block samples were tested for compressive strength after 28 days of curing period and a notable increase in compressive strength is observed for all the percentage addition of fibres when compared with the hollow concrete block without fibres.
How does air content affect strength? A. Intentionally entrained air voids improve the resistance of concrete to damage from cycles of freezing and thawing. Any air voids reduce the strength of concrete, with about a 5% reduction in strength for each 1% increase in the volume of air voids. Air voids, however, also improve the workability of ...
Higher curing temperatures promote an early strength gain in concrete but may decrease its 28-day strength. Effect of curing temperature on compressive strength development is presented in Figure 2.
ween various cylinder and cube sizes on the compressive strength of concrete. For standard concrete mixtures, at normal compressive strength levels, it was generally …
This study would test the compressive and flexural strength due to the effect of cold joint in concrete. The period of the casting between two concrete (cold joint) was 120 minutes and 240 minutes ...
These results suggest two important points in terms of estimating the characteristic compressive strength of concrete as follows: 1-. In this framework, the asymptotic …
The effect of steel fibers on the static compression strength of concrete and mortar was studied. . .Values for Young's modulus and Poisson's ratio for the various fiber percentages are also given.
This paper presents an experimental study on the compressive strength and fracture properties of PFRC experiencing different temperatures with different fiber contents and lengths. It was shown that the fracture path of concrete becomes longer after experiencing high temperatures.
Concrete structures are subjected to loadings which can be static or dynamic and in most cases, both. Deeper understanding on how concrete behaves to different modes of …
