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 MoreA. Concrete Compressive Strength According to the different used temperatures the values of compressive strength are obtained of specimens confined with different shapes of CFRP and unconfined specimens. The values of compressive strength are plotted versus temperature as shown in figure (8).

Get Morestrength of the concrete. This study is an attempt to explain the impact of a nano-silica on the compressive strength of concrete by explaining its microstructure. 1.3 OBJECTIVE OF THE STUDY The main objectives of the present study are as mentioned below: To study the effect of nano-silica on the compressive strength of concrete.

Get MoreThe specification for the floor of a maintenance building called for a inch slab thickness and concrete with a design compressive strength of 3000 psi. The actual average cylinder strength for the floor concrete was 3630 psi. Four months after the floor was placed, 10 cores were drilled, measured, and tested in compression.

Get MoreThe compressive strength of concrete is given in terms of the characteristic compressive strength of 150 mm size cubes tested at 28 days (fck). The characteristic strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall.

Get MoreTo evaluate the in-place concrete strength for acceptance for a structural member with potentially substandard strength, the compressive strength of cores may be required for assessment. Depending on the geometry and size of the core specimen, the compressive test results may need adjustment to characterize the in-place concrete strength.

Get MoreThe compressive strength of concrete is the most common performance measure used by the engineer in designing buildings and other structures. The compressive strength is measured by breaking cylin-drical concrete specimens in a compression-testing machine.

Get MoreSize and Shape Effects on the Compressive Strength of High Strength Concrete J.R. del Viso, J.R. Carmona & G. Ruiz, ... 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. ... This size effect on the compressive strength manifests that the specimen is ...

Get MoreEffect of Curing Methods on Compressive Strength Of Concrete 15 2. Review of Related Literatures In concrete technology, the maintenance of the drying and setting process is referred to as

Get MoreThe compressive strength decreased by 9–14% for concrete mixes mixed by fresh water and cured in seawater at different curing ages ( Table 4). In conclusion, mixing and curing concrete in seawater increases the early compressive strength, but the seawater has a negative effect on the compressive strength of concrete at ages over 28 days.

Get MoreThe compressive strength of concrete depends on the aggregate grading, aggregate/cement ratio as well as the water/cement ratio. The freshly mixed concrete should be workable to be properly placed and the hardened concrete needs to be durable and attain a specific compressive strength [1].

Get MoreThe compressive strength of concrete depends on the water to cement ratio, degree of compaction, ratio of cement to aggregate, bond between mortar and aggregate, and grading, shape, strength and size of the ... (vertisol) were incorporated to examine the effect on concrete strength. The concrete cubes were casted using steel of 150 x 150 x ...

Get MoreConcrete retempering was incorporated into the study because it has previously been linked to air void clustering. In addition to compressive strength testing at 7 and 28 days, an automated air void analysis, including a new method of clustering evaluation, was performed.

Get More2. Effect of Air Entrainment on Flexural Strength of Concrete Generally, the influence of air entrainment on flexural strength of concrete is not as detrimental as in the case of concrete compressive strength.

Get MoreThe factors that were studied to evaluate the effect of cylinder size on concrete compressive strength were aggregate size, technician, compressive strength, and age of specimen at testing. It was determined that compressive strength was the only factor significant in affecting the ratio of 4 x 8

Get MoreFactors Affecting Strength Test Results of Concrete Compressive strength is the most important property of concrete. The compressive strength of concrete is determined in the laboratory in controlled conditions. On the basis of this test result we judge the quality of concrete.

Get MoreEffect of Cube Size on the Compressive Strength of Concrete 1Misba Gul, 1Assistant Professor 1Department of Civil Engineering 1Islamic University of Science & Technology, Awantipora, India. _____ Abstract - In this paper the influence of the size of the cube specimens on the compressive strength of concrete has been investigated.

Get Morecompressive strength of concrete cast and cured at high temperature was lower than concrete cast and cured at 23°C (73”F). Concrete cast and cured at low temperature had initial strength lower than concrete cast and cured at 23°C (73°F). However, later age strength either equaled or exceeded that of concrete cast at 23°C (73”F).

Get MoreEffect of aggregate type on Compressive strength of concrete Abdullahi. M International Journal of Civil and Structural Engineering Volume 2 Is 794 (Olanipekun, Olusola, and Ata 2006; Neville, 1995). This further buttresses the point that the aggregates can be used for construction work.

Get MoreThe compressive strength of concrete batches FF agrees with the value of the compressive strength of 1:2:4 mix at 28days, of about 20N/mm2.The strength of concrete batches cast with salt water and cured with fresh water (SF) was also observed to have increased even …

Get Moreand fresh water on the compressive strength of concrete, concrete cubes were made, in which some of concrete cubes were casted and cured with fresh water and remaining concrete cubes were casted and cured with sea water. The amount of salt (NaCl) used in water was (25, 30, 35, 40, 45) grams/litre.

Get MoreFactors Affecting Strength Test Results of Concrete Compressive strength is the most important property of concrete. The compressive strength of concrete is determined in the laboratory in controlled conditions. On the basis of this test result we judge the quality of concrete.

Get MoreThe primary objective of this study is to investigate the effects of cylinder size (150 by 300 mm and 100 by 200 mm) on empirical equations that relate static elastic moduli and compressive strength and static and dynamic elastic moduli of concrete.

Get Moreconcrete at elevated temperatures. Along with the compressive strength, change in appearance & colour was also noted down. A careful study of these tables & graphs would reveal that, up to 350°C, the fall in compressive strength was negligible at less than 10%. At 500°C, the values of cube compressive strength became conscious

Get MoreFactors Affecting Strength Test Results of Concrete Compressive strength is the most important property of concrete. The compressive strength of concrete is determined in the laboratory in controlled conditions. On the basis of this test result we judge the quality of concrete.

Get MoreEffect of age on the compressive strength of ultra-high-performance fiber-reinforced concrete. ... 0%–40% of the compressive strength of concrete. Strain values were electronically measured from the initiation of loading at a rate of 0.3 MPa/s until the peak compressive strength was reached.

Get More9.5mm, 13.2mm and 19.0mm aggregates. Results indicates that compressive strength of concrete increased with increase in aggregate size. Rozalija and Darwin [12] studied the effect of Aggregate type, size and content on concrete strength and fracture energy. The results indicates that compressive strength of both normal and high strength concrete is

Get MoreThe specification for the floor of a maintenance building called for a inch slab thickness and concrete with a design compressive strength of 3000 psi. The actual average cylinder strength for the floor concrete was 3630 psi. Four months after the floor was placed, 10 cores were drilled, measured, and tested in compression.

Get MoreThis has necessitated the need to check the effect admixtures have on some properties of concrete. This study investigated the effect of calcium chloride (CaCl2) as an admixture on the compressive strength of concrete produced from Dangote, Elephant …

Get MoreThe SI unit for concrete strength measurement is the Mega Pascal, although 'Newtons per square millimetre' is still widely used as the numbers are more convenient. Thus 'Fifty Newton concrete,' means concrete which has achieved 50 Newtons per square millimetre, or 50 Mega Pascals.

Get Moreeffect on the compressive strength of the lateritic concrete mixes. This is in contrast to the performance of the concrete mixes which shows consistent decrease of compressive strength in water-cement ratio. Also, the degrees of workability of both concrete …

Get MoreThe effects of aggregate type, size, and content on the behavior of normal and high-strength concrete, and the relationships between compressive strength, flexural strength, and …

Get MoreUsing 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 30% ...

Get MoreWhat is the effect of coarse aggregate size in compressive strength of concrete? Update Cancel. ... greater the compressive strength of concrete. But this is valid only up to a certain limit, after which, the compressive strength of concrete starts to decrease as the MSA increases. ... to take into account all the effects of MSA on compressive ...

Get Morecubes were crushed on 7 & 28 days for compressive strength estimation. The results showed that the compressive strength of the concrete cubes made with mineral water, tap water, well water, waste water increased with days & not having much variation in their compressive strength.

Get MoreEffect of Rate of Loading on Compressive Strength of Concrete Saurah Mali, Tushar Pachpande and Ashwini Jogi Kothrud, Pune, India ABSTRACT: To accurately predict the behavior of a reinforced concrete structure subjected to dynamic loads, effect of change in …

Get MoreTitle: Effect of Curing Condition on Compressive Strength of Fly Ash Geopolymer Concrete. Author(s): Hongen Zhang, Xiaoshuang Shi, ... Additionally, the compressive strength of the 5HWC series is higher than that of the HSC series but lower than that of the 5HSC series, which indicates that cement will weaken the negative effect of wet curing ...

Get Morefor the design of high strength concrete M30. After lot of trials the combination of 1:1.3:2.6 of cement, fine Aggregates and Coarse Aggregates with 10% of Silica Fume the desired results i.e. 14 Days Compressive strength of the Concrete cubes was found to be nearly 37.53 MPa. Hence the study

Get MoreThe Effects of Plasticizer on the Compressive Strength of Concrete Six concrete cylinders were mixed with plasticizer, six with the normal concrete contents. After 7, 14, and 28 days, four of the cylinders were broken using a compression machine. The PSI was recorded to determine the effect of the plasticizer on strength.

Get MoreThis 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

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