Aggregate Crushing Value:
Aggregate Crushing Value:
Aggregate crushing value test on coarse totals gives a relative measure of the protection of a total smashing under step by step connected compressive load.
Coarse Aggregate smashing worth is the rate by weight of the pulverized material got when test totals are subjected to a predetermined load under institutionalized conditions.
Total pulverizing esteem is a numerical file of the quality of the total and it is utilized as a part of development of streets and asphalts.
Pulverizing estimation of totals shows its quality. Lower pounding esteem is suggested for streets and asphalts as it demonstrates a lower pulverized division under load and would give a more drawn out administration life and a more conservative execution.
The totals utilized as a part of streets and asphalt development must be sufficiently solid to withstand squashing under roller and activity. On the off chance that the total smashing quality is 30 or higher' the outcome might be strange and in such cases, the 10% fines esteem ought to be resolved.
Goal Of Aggregate Crushing Value Test:
Decide the total pulverizing estimation of coarse total
Survey reasonableness of coarse totals for use in various sorts of street
Device
A steel barrel 15 cm distance across with plunger and base plate.
A straight metal packing bar 16mm distance across and 45 to 60cm since quite a while ago adjusted toward one side.
An adjust of limit 3 kg decipherable and precise to one gram.
IS sifters of sizes 12.5mm, 10mm, and 2.36mm
A pressure testing machine.
Round and hollow metal measure of adequate unbending nature to hold its form under unpleasant utilization and of 11.5cm distance across and 18cm stature.
Dial check.
Inspecting of Aggregates:
Coarse total passing 12.5mm IS sifter and held on a10mm IS strainer are chosen and warmed at 100 to 110°C for 4 hours and cooled to room temperature.
The amount of total might be to such an extent that the profundity of material in the chamber, in the wake of packing as portrayed beneath should be 10 cm. The fitting amount might be discovered advantageously by filling the barrel.
Measure in three layers of roughly square with profundity, each layer being packed 25 times with the packing pole lastly leveled off utilizing the packing pole as a straight edge.
Care being taken on account of weaker materials not to break the particles. The heaviness of the material including the test might be resolved (weight An) and a similar weight of test should be taken for the rehash test.
Methodology of Aggregate Crushing Value Test:
Set the barrel in place on the base plate and measure it (W).
Put the example in 3 layers, each layer being subjected to 25 strokes utilizing the packing bar. Care being taken on account of powerless materials not to break the particles and measure it (W1).
Level the surface of total precisely and embed the plunger so it lays on a level plane at first glance. Care is taken to guarantee that the plunger does not stick in the barrel.
Place the chamber with a plunger on the stacking stage of the pressure testing machine.
Apply stack at a uniform rate with the goal that an aggregate heap of 40T is connected in 10 minutes.
Discharge the heap and expel the material from the barrel.
Sifter the material with 2.36mm IS strainer, mind being assumed to stay away from loss of fines.
Measure the portion going through the IS sifter (W2).
Figuring of Aggregate Crushing Value:
The proportion of the weight of fines framed to the heaviness of aggregate example in each test might be communicated as a rate, the outcome being recorded to the main decimal place.
Total squashing esteem = (W2 x 100)/(W1-W)
W2 =Weight of the division going through the fitting strainer
W1-W =Weight of surface dry example.
The mean of two outcomes to closest entire number is the total pounding esteem.
Result:
The total smashing estimation of the given sample=
Total Crushing Values for Roads and Pavement Construction
The table underneath demonstrates cutoff points of total smashing an incentive for various sorts of street development:
Sorts of Roads/Pavements Aggregate Crushing Value Limit
Adaptable Pavements
Soling 50
Water bound macadam 40
Bituminous macadam 40
Bituminous surface dressing or thin premix carpet 30
Thick blend carpet 30
Unbending Pavements
Other than wearing course 45
Surface or Wearing course 30
Aggregate crushing value test on coarse totals gives a relative measure of the protection of a total smashing under step by step connected compressive load.
Coarse Aggregate smashing worth is the rate by weight of the pulverized material got when test totals are subjected to a predetermined load under institutionalized conditions.
Total pulverizing esteem is a numerical file of the quality of the total and it is utilized as a part of development of streets and asphalts.
Pulverizing estimation of totals shows its quality. Lower pounding esteem is suggested for streets and asphalts as it demonstrates a lower pulverized division under load and would give a more drawn out administration life and a more conservative execution.
The totals utilized as a part of streets and asphalt development must be sufficiently solid to withstand squashing under roller and activity. On the off chance that the total smashing quality is 30 or higher' the outcome might be strange and in such cases, the 10% fines esteem ought to be resolved.
Goal Of Aggregate Crushing Value Test:
Decide the total pulverizing estimation of coarse total
Survey reasonableness of coarse totals for use in various sorts of street
Device
A steel barrel 15 cm distance across with plunger and base plate.
A straight metal packing bar 16mm distance across and 45 to 60cm since quite a while ago adjusted toward one side.
An adjust of limit 3 kg decipherable and precise to one gram.
IS sifters of sizes 12.5mm, 10mm, and 2.36mm
A pressure testing machine.
Round and hollow metal measure of adequate unbending nature to hold its form under unpleasant utilization and of 11.5cm distance across and 18cm stature.
Dial check.
Inspecting of Aggregates:
Coarse total passing 12.5mm IS sifter and held on a10mm IS strainer are chosen and warmed at 100 to 110°C for 4 hours and cooled to room temperature.
The amount of total might be to such an extent that the profundity of material in the chamber, in the wake of packing as portrayed beneath should be 10 cm. The fitting amount might be discovered advantageously by filling the barrel.
Measure in three layers of roughly square with profundity, each layer being packed 25 times with the packing pole lastly leveled off utilizing the packing pole as a straight edge.
Care being taken on account of weaker materials not to break the particles. The heaviness of the material including the test might be resolved (weight An) and a similar weight of test should be taken for the rehash test.
Methodology of Aggregate Crushing Value Test:
Set the barrel in place on the base plate and measure it (W).
Put the example in 3 layers, each layer being subjected to 25 strokes utilizing the packing bar. Care being taken on account of powerless materials not to break the particles and measure it (W1).
Level the surface of total precisely and embed the plunger so it lays on a level plane at first glance. Care is taken to guarantee that the plunger does not stick in the barrel.
Place the chamber with a plunger on the stacking stage of the pressure testing machine.
Apply stack at a uniform rate with the goal that an aggregate heap of 40T is connected in 10 minutes.
Discharge the heap and expel the material from the barrel.
Sifter the material with 2.36mm IS strainer, mind being assumed to stay away from loss of fines.
Measure the portion going through the IS sifter (W2).
Figuring of Aggregate Crushing Value:
The proportion of the weight of fines framed to the heaviness of aggregate example in each test might be communicated as a rate, the outcome being recorded to the main decimal place.
Total squashing esteem = (W2 x 100)/(W1-W)
W2 =Weight of the division going through the fitting strainer
W1-W =Weight of surface dry example.
The mean of two outcomes to closest entire number is the total pounding esteem.
Result:
The total smashing estimation of the given sample=
Total Crushing Values for Roads and Pavement Construction
The table underneath demonstrates cutoff points of total smashing an incentive for various sorts of street development:
Sorts of Roads/Pavements Aggregate Crushing Value Limit
Adaptable Pavements
Soling 50
Water bound macadam 40
Bituminous macadam 40
Bituminous surface dressing or thin premix carpet 30
Thick blend carpet 30
Unbending Pavements
Other than wearing course 45
Surface or Wearing course 30
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