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. Gap-graded aggregate are used to obtain uniform textures in exposed aggregate concrete.

For water-cement ratio below 0.4 the use of crushed aggregate has resulted in strength up to 38 percent higher than the rounded aggregate. When gap-graded aggregate are specified, certain particle sizes of aggregate are omitted from the size continuum. Absorption relates to the particle's ability to take in a liquid. Also read: Crushing Value Test of Aggregates 13. COURSE LAYOUT. Properties of Aggregates also has effect on resulting concrete. variation in size, grading, texture, shape and strength of aggregates means variation in the properties of resulting concrete. The ANN model, run in a Matlab platform, was used to predict the compressive strength of the recycled aggregate concrete. In general, if the water-cement ratio is chosen correctly, a wide range in grading can be used without a major effect on strength. Concrete Technology by Dr. B. Bhattacharjee,Department of Civil Engineering,IIT Delhi.For more details on NPTEL visit httpnptel.ac.in. The size, the number, and the continuity of the pores through an aggregate particle may affect the strength of the aggregate, abrasion resistance, surface texture, specific gravity, bonding capabilities, and resistance to freezing and thawing action.

While irregular aggregate will interlock somewhat better than rounded aggregate, it still won't be able to promote the kind of strength necessary for roadways and other heavy-duty applications. For water-cement ratio below 0.4 the use of crushed aggregate has resulted in strength up to 38 percent higher than the rounded aggregate. to the course;

Concrete is a mixture of cementitious material, aggregate and water. Aggregates comprise as much as 60% to 80% of a typical concrete mix, so they must be properly selected to be durable, blended for optimum efficiency, and properly controlled to produce consistent concrete strength, workability, finishability, and durability (Photo 1).

Aggregate surface textures can increase the skid resistance of asphalt pavements, and large particle sizes can increase its ultimate load capacity.

which affects concrete strength and durability in many ways.

Gap-graded aggregate are used to obtain uniform textures in exposed aggregate concrete. Effect of Aggregate Size on Strength 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? Two nominal mixes, that is, 1:2:4 and 1:3:6 were used in the study. All measured properties were highly variable.

Aggregate is the component of a composite material that resists compressive stress and provides bulk to the composite material. These effect of aggregate properties on concrete are discussed in detail. sieve and retained on 10 mm I.S. Other research has compared the effects of limestone and basalt on the compressive strength of high-strength concrete (Giaccio,

Coarse aggregates have properties such as size, shape, moisture contents, specific gravity, density etc.

The results show that ANN has good potential to be used as a tool for predicting the compressive strength of recycled aggregate concrete prepared with varying types and sources of recycled aggregates.