Maximum compressive strength was found 3.87 ksi for concrete having fineness modulus for fine and coarse aggregate as 3.0 and 7.5 respectively with mix ratio 1:2:4. Compressive strength of ...
Compressive strength tests were carried out on all 18 test cubes and their compressive strength values were recorded. The compressive strength was found to increase with increase in coarse aggregate size with19mm gravel having as much as 36.31N/mm 2 .
Cordon and Gillespie [ 5] found that compressive strength of concrete decreases as the maximum size of aggregate increases which is most likely due to a higher number of microcracks at the ITZ for concrete made with larger aggregates as compared to those made with smaller aggregates [ 14 ].
Coarse aggregate is a type of aggregate used in concrete that is larger than 4.75 mm in size. It is typically made up of crushed stone, gravel, or recycled concrete, and is used to provide bulk to the concrete mixture, …
The optimum maximum coarse aggregate size for the best compressive strength of 28 day concrete was therefore found to be 8mm for the water/cement ratio of 0.63. The analysis further shows that as heterogeneity increases the compressive strength of concrete reduces. Keywords: Gneiss, compressive strength, aggregate sizes, slump, …
This study investigates the effect of aggregate size on the compressive strength of concrete. Two nominal mixes, that is, 1:2:4 and 1:3:6 were used in the study. Concrete cubes were produced with 6, 10, 12.5, 20 and 25 mm aggregates for the two nominal mixes and they were subjected to compressive strength test after curing for 7, 21, 28 and 56 …
The compressive strength and flexural strength therefore play a crucial role. Effect of varying coarse aggregate size on the flexural and compressive strengths of concrete …
ACI Mix Design Example. A concrete mix is to be designed for use in a 250 mm (10 inch) thick JPCP pavement. The desired properties are: Slump = 25 mm (1.0 inch) Average 28-day flexural strength of at least 4.5 MPa (650 psi) Coarse aggregate: nominal maximum size = 37.5 mm (1.5 inch), dry-rodded weight = 1600 kg/m 3 (100 lb/ft 3 ), specific ...
It establishes that the size of aggregates plays a crucial role in determining the compressive strength, flexural strength, and splitting tensile strength properties of …
The permeability and strength of PCPB with different sizes of coarse aggregate was presented in this study. Three different sizes of coarse aggregate were used namely passing 10 mm retained 5 mm ...
This paper investigates the effects of steel fiber content and coarse aggregate size on the mechanical properties of high-strength concrete with a specified compressive strength value of 60 MPa.
The paper examined the impact of coarse aggregates on the compressive strength of concrete. Slump and compaction factor tests were conducted on the mixture of quartzite and crushed granite coarse ...
This paper investigates the effects of steel fiber content and coarse aggregate size on the mechanical properties of high-strength concrete with a specified compressive strength value of 60 MPa. The paper also explores the correlation between the compressive and flexural toughness of high-strength steel fiber-reinforced …
To investigate the size effect of self-ignition coal gangue coarse aggregate concrete, this experiment employed three different sizes of cubic specimens. The compressive …
Samples with graded coarse aggregate achieved compressive strength higher than those with 4.75mm and 6.7mm coarse aggregate size respectively, but lower than the rest of the …
The relationship between compressive strength and the change in the maximum size of coarse aggregate with constant fineness modulus of sand and varied cement content (For normal strength concrete)
The rational range of the ratio of steel fiber length to coarse aggregate maximum size is 1.25–3 for the considerable strengthening effect of steel fiber on splitting tensile strength and flexural performances of concrete and 1–4 for that on fracture characteristics respectively.
A consistent type of expanded clay lightweight fine aggregate was used in casting the reinforced ALWAC specimens. Additionally, a natural CA was included for comparative …
The compressive strength and flexural strength therefore play a crucial role. Effect of varying coarse aggregate size on the flexural and compressive strengths of concrete beam was investigated.
Request PDF | Effect of Maximum Coarse Aggregate Size on Dynamic Compressive Strength of High-Strength Concrete | Dynamic increase factor (DIF) is a measure of the rate effect in the analysis and ...
It was found that the size of the coarse aggregate that offered a maximum compressive strength is in the range of 12.5–25 mm. Furthermore, the size of the coarse aggregate does not affect the trend results on ambient vs. oven-cured specimen, as well as the days of curing.
Even so, it was hypothesised that as the standard deviation of the water absorption of recycled coarse aggregate increases over a wide range, the compressive strength of HPC will first increase ...
The investigation results indicated that the compressive strength, MOE, digital rebound hammer number, ultrasonic pulse velocity, and electrical resistivity decreased with the increasing percentage replacement, whereas the 5–12 mm coarse aggregate size mixes showed better performance than the 12–20 mm aggregate mixes.
For each combined sizes of coarse aggregates, 21cubes (150×150mm) were cast to allow the compressive strength to be monitored at 7, 14 and 28 days respectively.
The main aim of this study is to carryout comparative analysis of concrete strength made from various sizes of crushed coarse aggregate.
A. As the nominal maximum size of the aggregate is increased, the amount of water needed for the same workability is reduced. At the same cementitious material content, strength is therefore greater because the w/cm is lower. But in the high-strength range, over 40 MPa (5800 psi), higher compressive strengths are usually obtained at a given …
This research aimed to assess and quantify the effect of various mixture proportions on the compressive strength of steel slag concrete when coarse aggregate is substituted, including the water ...
The compressive strength and flexural strength therefore play a crucial role. Effect of varying coarse aggregate size on the flexural and compressive strengths of concrete beam was investigated.
Given the critical role that the interfacial transition plays in high-strength concrete, the mechanical properties of coarse aggregate will have a more pronounced effect than they would in conventional-strength …
Considering their superior compressive strength and excellent permeability, PCs with 50% RCA as coarse aggregate, and 7% SF and 20% GGBS as SCMs, are practical for the production of eco-friendly permeable paving blocks, which seems to be promising for application in building construction.
Feature sensitivity analysis identified the volume fraction of steel fibers, water reducer amount, and silica fume content as the three most influential factors affecting the compressive strength of UHPC-CA. Finally, the interaction among the content of aggregate, the strength of aggregate, and the volume fraction of steel fibers was …
