Impact of Admixtures on Strength Properties of Concrete
The test results indicate that the compressive strength & flexural strength of HSC is about 33.69 & 13.09% are more than conventional concrete and Percentage mass loss is less when immersed in ...
Effect of Aggregate Type and Specimen Configuration on Concrete …
In this paper, concrete mixes utilizing two sizes of natural aggregate and two sources of lightweight and recycled aggregates were used to investigate the effect of aggregate type and specimen size and shape on the compressive strength of concrete. In addition, samples from ready-mix concrete producers with different strengths were …
Structural effects and real strain-rate effects on compressive strength
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 …
Factors affecting the results of concrete compression
The strength of concrete affects the influence of size and shape effects on the compressive strength of a specimen. Also, the size effect is dependent on the maximum aggregate size for both medium and high strength concrete.
Effects of Environmental Factors on Concrete Carbonation Depth …
Temperature can influence the chemical reaction significantly. In this paper, the influences of temperature (10 °C, 20 °C and 30 °C) on concrete carbonation were analyzed by the changes of carbonation depth and compressive strength of concrete, which had been carbonized for 28 d under 70% relative humidity and a 20% CO 2 …
EFFECT OF CURING METHODS ON THE COMPRESSIVE STRENGTH OF CONCRETE
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 ...
Effects of Environmental Factors on Concrete Carbonation Depth …
The influence of temperature, CO2 concentration and relative humidity on the carbonation depth and compressive strength of concrete was investigated. Meanwhile, phase composition, types of hydration products and microstructure characteristics of samples before and after the carbonation were analyzed by XRD and ESEM. Research …
(PDF) Analysis on Compressive Strength of Concrete …
The 28 days compressive strength was found as 2862 psi for concrete cast with Sylhet sand, which was 12.51%, 15.65% and …
Compressive Strength of Concrete and Concrete Testing
The compressive strength of the concrete and concrete testing is must known information in structural design. Compressive strength is initially checked by doing mix design to make sure the grade of concrete considered in the structural design is achieved. ... In addition, curing affects the durability of concrete. The effect of moist …
Effects of Fibers on Compressive Strength of Concrete
Effects of Fibers on Compressive Strength of Concrete 1. Introduction. The concrete, which is free from fibers, lead in the development of cracks because of fictile...
Effects of Curing Condition and Curing Period on the Compressive
The effect of curing conditions on compressive strength of ultra high strength concrete with high volume mineral admixtures. Building and E nvironment 2007; 42: 2083-2089.
(PDF) Effect of fly ash on compressive strength, carbonation and
Also, this review analyzes the impact of FA as a partial replacement of cement in concrete and its effect on the depth of carbonation in concrete elements and the corrosion rate of embedded steel ...
(PDF) Temperature effect on concrete
Effect of compressive strength . ... The results also revealed that the relative strength of concrete decreased as the exposure temperature increased. The effect of high temperatures on the ...
Key Factors Affecting Strength of Concrete
Bulk weight. The above mention characteristic influences workability, finishability, bleeding, and segregation of fresh concrete effects the strength, shrinkage, density, and durability of hardened concrete. 2. Water Cement Ratio. The water-cement ratio is one of the most important factors affecting strength of concrete.
The Compressive Strength of High-Performance Concrete and
Between one and about ten days, the compressive strength increases linearly according to the logarithm of time . The coefficient represents the kinetics of the hydration reaction. …
Compressive strength, flexural strength, and durability of
Concrete's compressive strength increases over time regardless of the amount of fly ash in it, according to Table 3. Concrete mixtures' early age (3 and 7 days) compressive strength decreases with increased fly ash percentage. ... Effect of fly ash on strength of concrete. In: Ghosh SK and Kumar V (ed) Circular economy and fly ash ...
The Time Variation Law of Concrete Compressive Strength: A …
Concrete is a building material that is most widely used because of its excellent mechanical performance and durability. Compressive strength is an essential property of concrete, which changes with time under various factors. In this paper, the time variation law of the compressive strength of concrete was reviewed from three …
Effect of Curing Regime on Compressive Strength of Geopolymer Concrete
M30 grade concrete mix with the equivalent GPC is developed. From the experimental results, it was found that compressive strength was effected by curing temperature and curing time at 3, 7 and 28 ...
Influence of different curing methods on the compressive strength …
1. Introduction. Ultra-high-performance concrete (UHPC) is a new class of concrete developed in France in the 1990s with superior characteristics, including high workability, high compressive strength, increased ductility, and high resistance to environmental attacks [1], [2], [3].UHPC is generally defined as concrete with a …
A concrete damage plasticity model for predicting the effects of
At the same time, the influence of the initial static load on dynamic compressive strength of concrete could be reduced when the strain rate was increased. Ref. [26] investigated the dynamic compressive behavior of high-strength concrete with three different strengths: 60 MPa, 80 MPa and 110 MPa, with labels; C60, C80, C100, …
IOP Conference Series: Materials Science and Engineering
3.1. Compressive strength According to Kodur, V[15]the compressive strength of concrete can be reduced if it is exposed to high temperature. In this study, the effects of heating durations to normal concrete (NC) compressive strength can be determined. The average compressive strength of normal concrete before and after fire
Effects of loading rates on concrete compressive strength
Aside from the number of confinement layers, various loading speeds can influence how concrete fractures grow in terms of crack intensity and crack velocity. The compressive strength increases ...
Effect of Superabsorbent Polymer (SAP) Size on Microstructure …
The compressive strength of cement paste, even after 28 days, is slightly reduced following the introduction of SAPs. However, the strength of concrete, due to the naturally occurring pores eliminating the negative effects of the pores produced by SAPs, is significantly increased following the introduction of SAPs, especially 400 µm SAP.
Effects of Compressive Strength of Concrete on RC Columns
At 800 °C, the concrete lost its compressive strength drastically, irrespective of the grade of concrete. At 1000 °C, the residual compressive strength …
Revisiting the concept of characteristic compressive strength of …
Characteristic compressive strength Size effect Finite-size scaling Concrete Strength variability 1. Introduction In civil engineering, concrete is mostly …
(PDF) THE EFFECT OF CURING METHODS ON COMPRESSIVE STRENGTH …
This experiment work was carried out to investigate the effect of concrete strength in terms of compressive strength for M25 and M30 concrete by adopting immersion curing, wet gunny bags curing and steam curing as per IS 10262-2009. Traditionally quality of concrete in construction work is calculated in terms of its 28 days compressive strength.
The Effect of Polypropylene and Steel Fibers on the
The compressive strength of concrete decreases considerably due to freezing and thawing, but for reinforced concrete, this decrease is lower than plain concrete. Due to PPF addition, there is a negligible effect of the freeze–thaw cycle on the compressive strength of concrete (Richardson 2006). There is improvement in the …
Shape and size effects on the compressive strength of high …
In this paper we investigate the influence of the shape and of the size of the specimens on the compressive strength of high-strength concrete. We use cylinders …
(PDF) Effect of Specimen Size and Shape on Strength of Concrete
In fact, the size effect seems to be more evident in cubic specimens more than cylindrical ones [2, 21, 95]. Thus, the concrete compressive strength is also dependent on the shape, although ...
Shape and size effects on the compressive strength of high-strength
1. Introduction. By far the most common test carried out on concrete is the compressive strength test. The main reason to understand this fact is that this kind of test is easy and relatively inexpensive to carry out [1].Testing standard requirements use different geometries of specimens to determine the compressive concrete strength, f …