### The effect of maximum size of aggregate on concrete strength

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 w/cm

More### Effect of Maximum Aggregate Size on the Strength of Normal

The strength of (normal or high-strength) concrete is affected by the maximum size of a well-graded coarse aggregate. Concrete mixes containing larger coarse aggregate particles need less mixing water than those containing smaller coarse aggregates, In other words, small aggregate particles have more surface area than a large aggregate particle.

More### Effect of Maximum size of Aggregate on Strength of Concrete #4

Mar 04, 2018· This video explains the concept of Effect of Maximum size of Aggregate on Strength of Concrete. This video explains the concept of Effect of Maximum size of Aggregate on Strength of Concrete

More### Influence of Aggregate Size on Concrete Strength and Shrinkage

3/4 in. (19.0 mm) maximum aggregate size, but the contractor wants to use a mixture with 3/8 in. (9.5 mm) nominal maximum aggregate size. As long as the water-cement ratio (w/c) is maintained, would there be any significant changes in the strength of the concrete or drying shrinkage? A. In general, a decrease in the maximum coarse

More### Effect of Aggregate Maximum Size upon Compressive Strength

Sep 26, 2020· Variation of concrete strength with MAS for the three mixes 1:1.5:3, 1:2:4 and 1:3:6 4. CONCLUSION 1. In general the concrete compressive strength increases when the maximum size of aggregate

More### Effect of Maximum Aggregate Size on the Bond Strength of

The bond between reinforcements and concrete is the only mechanism that transfers the tensile stresses from concrete to reinforcements. Several factors including chemical adhesion, roughness and reinforcement interface and bar bearing affect the bond strength of reinforcements with concrete. This work was carried out considering another varying factor which is maximum aggregate size.

More### Effect of Aggregate Size on Strength| Concrete

Mar 01, 1980· Q.: How much stronger is a floor made with 1/2-inch aggregate than one with 3/4-inch aggregate if all other ingredients remain the same? A.: If the quantities of coarse aggregate, fine aggregate, cement and water are the same for both mixes, the mix with l l/2-inch aggregate will have greater slump and will probably bleed more.

More### HOW AGGREGATE PROPERTIES AFFECTS CONCRETE

Feb 15, 2019· Size of aggregates. The nominal maximum size of coarse aggregate should be as large as possible within the limits specified, but in no case greater than 1/4th of the min. thickness of the member. For most works, 20 mm aggregate is suitable. 40 mm and 10 mm size

More### Effects Of Aggregate Sizes On The Concrete Strength

INSTRUCTIONS: Effects Of Aggregate Sizes On The Concrete Strength project material. Please, sit back and study the below research material carefully. DO NOT copy word for word. UniProjects aim of providing this Effects Of Aggregate Sizes On The Concrete Strength project research material is to reduce the stress of moving from one school library to another all in the name of searching for

More### Influence of Aggregate Size on Concrete Strength and

3/4 in. (19.0 mm) maximum aggregate size, but the contractor wants to use a mixture with 3/8 in. (9.5 mm) nominal maximum aggregate size. As long as the water-cement ratio (w/c) is maintained, would there be any significant changes in the strength of the concrete or drying shrinkage? A. In general, a decrease in the maximum coarse

More### Effect of Maximum Aggregate Size on the Strength of Normal

The strength of (normal or high-strength) concrete is affected by the maximum size of a well-graded coarse aggregate. Concrete mixes containing larger coarse aggregate particles need less mixing water than those containing smaller coarse aggregates, In other words, small aggregate particles have more surface area than a large aggregate particle.

More### (PDF) INFLUENCE OF MAXIMUM AGGREGATE SIZE ON STRENGTH

Abstract The main purpose of this research is to evaluate the effect of maximum size of coarse aggregate (MSCA) on the development of strength (compressive and tensile) of high strength concrete

More### EFFECTS OF MAXIMUM SIZE COARSE AGGREGATE AND

3.2.1 Maximum size of coarse aggregate In general, the effect of Variation in maximum size of coarse aggregate on concrete properties is well known. The increase in maximum size results in lower compressive strength in rich mixes and higher compressive strength in leaner mixes using rounded coarse aggregates (gravels) (1).

More### EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

increase in aggregate size results in a decrease in the compressive strength of concrete. Cook (1989) showed that, for compressive strengths in excess of 69 MPa (10,000 psi), smaller sized coarse aggregate produces higher strengths for a given water-to-cement

More### Effects of maximum size of brick aggregate on properties

Mar 01, 2017· Effects of maximum aggregate size (12.5 mm, 19.0 mm, 25.0 mm, 37.5 mm, and 50.0 mm) on properties of concrete made with different sand to total aggregate volume ratio (0.40 and 0.45), W/C ratio (0.45, 0.50, and 0.55), and cement content (375 kg/m 3 and 400 kg/m 3) were investigated.Considering the variables, a total of 552 concrete cylinder

More### Maximum Aggregate Size CivilWeb Spreadsheets

Optimizing the Maximum Aggregate Size in Concrete. The optimal maximum aggregate size needs to be determined both by the desired properties of the fresh and hardened concrete and by physical limitations. The physical limitations are typically the gaps between reinforcing steel bars or simply the depth of the slab for a concrete pavement or floor.

More### Scale and Aggregate Size Effects on Concrete Fracture

large microcracking zone (fracture process zone or FPZ) which is proportional to the maximum aggregate size (d max). This fracture process is accompanied by strain-softening in the form of microcracking and fractional slip. Experimentally, size effect in concrete is commonly studied by using geometrically similar

More### Effects of shape and size of aggregates in concrete

Effects of shape and size of aggregates in concrete. Q. How does the shape and size of coarse aggregates affect the properties of concrete? A. Aggregate shape and surface texture influence the properties of freshly mixed concrete more than the properties of hardened concrete. Rough-textured, angular, and elongated particles require more water

More### Maximum aggregate size Structural engineering general

1.5 X max aggregate size 1.5 X the bar diameter 1.5 inches Per the AASHTO spec, dropping to 3/4" max aggregate size doesn't help. That assumes the concrete will be vibrated. In drilled shafts, which do not get vibrated, the limit in the newer LRFD spec is 5 X the max aggregate size (it was 3 X in the older standard spec)

More### Aggregate size| Concrete Construction Magazine

3. The advantage of small aggregate in the water-ratio strength relationship may or may not be sufficient to offset the effects of its higher mixing water demand. It appears that optimum maximum size, so far as strength is concerned, will vary for different aggregates, different cement factors, different test ages and probably other conditions. 4.

More### HOW TO DECIDE MAXIMUM SIZE OF COARSE AGGREGATE TO

Mar 23, 2015· On the other hand in smaller size aggregates the surface area is increased which increases w/c ratio and lower strength is achieved. In general for strength upto 200 kg/cm 2 aggregates upto 40 mm may be used and for strength above 300 kg/cm 2 aggregate upto 20 mm may be used. Conditions That Decide Maximum Size of Coarse Aggregate to be Used

More### EFFECTS OF AGGREGATE SIZES ON THE CONCRETE STRENGTH

EFFECTS OF AGGREGATE SIZES ON THE CONCRETE STRENGTH. Abstract. In the sense that the materials involved in this project were capital intensive more especially cement, so in carrying out the work one must have to be careful in the selection and collection of materials to be used in the casting of the concrete.

More### The Effect of Maximum Coarse Aggregate Size on the

In a study to assess the effect of size of aggregate in higher grade concrete using high volume fly ash, Bhikshma and Florence (2013) found that aggregate sizes influence its strength and that maximum size of coarse aggregate of 12.5 mm gave the highest compressive strength, splitting tensile strength and flexural strength.

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