Which factor is considered for design of CC pavement?
Traffic and loading Traffic is the most important factor in the pavement design. The key factors include contact pressure, wheel load, axle configuration, moving loads, load, and load repetitions.
What is pavement quality index?
To determine the order and priorities of which streets will receive a pavement treatment, a Pavement Quality Index (PQI) score is developed for each street segment, which is measured 0-100 (Poor to Excellent).
What is pavement PCC?
Portland cement concrete (PCC) pavements (or rigid pavements) consist of a PCC slab that is usually supported by a granular or stabilized base, and a subbase. In some cases the PCC slab may be overlaid with a layer of asphalt concrete.
How do you calculate PCI pavement?
For PCI values as a whole on certain road segments shown by the following equation: PCI = ∑ PCI (s) / N (3) Where: PCI = overall pavement PCI value. PCI(s) = Pavement Condition Index of pavement section N = Number of units PCI values obtained are used to assess pavement conditions.
What are the major stresses in CC pavement?
What are the major stresses in CC pavement? Explanation: The major stress is caused due to wheel load and temperature, remaining all are the minor stresses.
What is CBR in pavement design?
The california bearing ratio test is penetration test meant for the evaluation of subgrade strength of roads and pavements. The results obtained by these tests are used with the empirical curves to determine the thickness of pavement and its component layers.
What is PCI value of road?
The Pavement Condition Index (PCI) is a numerical indicator that rates the general surface condition of a pavement or road. It is a statistical measure which requires manual/visual inspection and survey of the required roads, and was developed by the United States Army Corps of Engineers.
How is PCI value calculated?
The PCI is computed using the relation PCI = 100 − CDV. where PCIf = PCI of pavement section, PCI1 = average PCI of random samples, PCI2 = average PCI of additional samples, N = total number of samples in the section, and A = number of additional samples inspected.
What is the ratio of PCC?
PCC Ratio. PCC concrete mix ratio is 1:5:10, which Means 1 part of cement, 5 parts of sand, and 10 parts of aggregate.
How do you prepare a road estimate for CC?
Qty of Cement = 1/7 of the Dry of volume = 1/7 x 1.54 = 0.22 M3. for 1200 Cum of Concrete, No. of bags = 1200*6.4 = 7680 Bags.
What is PCI value?
The final calculated PCI value is a number from zero to 100, with 100 representing a pavement in excellent condition. The pavement condition rating is determined from a correlation that presents pavement condition rating as a function of the PCI value.
What are the warping stresses how they are developed in CC pavement?
WARPING STRESS Warping of the pavement slab is caused by a difference in temperature between top and bottom of the slab. At day time the pavement slab gets heated under sunlight which tensile upwards while the bottom of the slab remains colder where compress stress develops.
How is PCI determined?
The PCI of each tested sample unit is calculated using the method defined in the standard. In summary this involves calculating the distress quantities and the distress densities for each tested unit. These values are used to determine a deduct value and this deduct value is subtracted from 100 to give the PCI value.
What is IRI in pavement?
The International Roughness Index (IRI) is used by highway professionals throughout the world as a standard to quantify road surface roughness. A continuous profile along the road is measured and analyzed to summarize qualities of pavement surface deviations that impact vehicle suspension movement.
What is PCC thickness?
The Thickness of PCC: The thickness of PCC is normally 50mm over Brick Flat Soling (BFS). If you don’t use BFS below PCC then the thickness should be 75¬mm. When the PCC is used in car parking area then the thickness should be 75mmover BFS.
What is PCC and RCC ratio?
Concrete mix ratio is used as PCC (plain cement concrete) in Roadways Pathwas formation and for flooring of house and also concrete mix ratio is used as RCC for the formation of roof slab, Foundation, footing, beam and column. PCC ratio for footing:– generally concrete mix ratio used as PCC for footing is 1:3:6 (M10).
What is CC road?
Road having their wearing surface consisting of cement concrete slab are called as cement concrete road. Cement concrete roads are considered as most serviceable and rigid pavements.
What does the pavement condition unit do?
The Pavement Condition Unit conducts annual surveys of the entire State highway system in support of the Department’s Pavement Management Program. The data collected (in terms of crack, ride, and rut measurements) is used to assess the condition and performance of the State’s roadway as well as to predict future rehabilitation needs.
What is a Pavement Condition Index?
A pavement condition index is simply the scale, or series of numbers, used to describe a pavement condition. Typical pavement condition indices may be based on a scale of 0 to 5 or perhaps 0 to 100.
What is a pavement condition score?
This score, sometimes called a pavement condition rating, quantifies a pavement’s overall performance and can be used to help manage pavement networks. By carefully choosing the rating scale (called the condition index), pavement condition scores can be used to (Deighton, 1997 [1] ):
How is the condition of the whole pavement evaluated?
In the windshield method, the condition of the whole pavement segment is evaluated with a real- time PCI score on the field laptop by a qualified pavement condition rater at the site. This provides a more representative condition rating of the whole segment.