Table of Contents
What is particle breakage?
In the fundamentals of particle breakage, the crushability of granular soil is mainly related to the physical nature and mechanical properties of soil, the stress-strain state on soil and the surrounding environment on soil, which were always interpreted by the energy theory and fractal theory.
What is gap graded soil?
A gap-graded soil is a soil that has an excess or deficiency of certain particle sizes or a soil that has at least one particle size missing. An example of a gap-graded soil is one in which sand of the no. 10 and no. 40 sizes are missing, and all the other sizes are present.
What are the advantages of gap grading?
Advantages of Gap Grading Requirements of sand is reduced by 26 to 40%. Specific area of area of total aggregates will be reduced due to less use of sand.. Point contact between various size fractions is maintained, thus reducing the dying shrinkage.
How do I know if my soil is gap graded?
A soil is said to well grade if it has a good representation of all grain sizes. If the soil grains are approximately of same size, then the sample is described as poorly graded. A soil is said to be gap graded if the intermediate grain sizes are absent.
What are the merits and demerits of gap graded aggregate?
Gap-graded concretes also show less segregation, tend to be more workable at given slumps, permit lower water-cement ratios and develop required strength with lower cement factors. Creep and shrinkage are also less in gap-graded concrete than in comparable standard mixes.
What is gap graded aggregate used for?
Gap-graded mixes are used to obtain uniform textures for exposed-aggregate concrete and can also increase strength and reduce creep and shrinkage.
What is gap grading of aggregates?
Gap grading of the aggregates results in lower requirement of water content, and hence lower water-cement ratio, and permits a higher aggregate-cement ratio to achieve the same workability as its continuously graded counterpart with equal cement content and equal maximum size of coarse aggregate.
What are the advantages of a gap-graded mix?
What is gap-graded aggregate used for?
What are the advantages of a gap graded mix?
What do you mean by Gap graded and uniformly graded?
This means that the particles pack together, leaving relatively large voids in the concrete. It is also called “uniform-graded”. It is characterized by steep curve. • Gap graded : Gap-graded aggregate consists of aggregate particles in which some intermediate size particles are missing.
Where is gap graded aggregate used?
Gap grading is defined as grading where one or more intermediate-size fractions are absent. This type of concrete is obtained when gap-graded aggregates are used in concrete production. In the case of spaced hierarchies, some undesirable size aggregates are omitted from conventional continuous hierarchies.
What is the problem with Gap graded aggregate?
A word of caution while using gap grading is that, sometimes it may lead to segregation and may even alter the anticipated workability. Therefore tests must be conducted before adopting this gradation.