When was Mbagathi road built?
August 2005
Nairobi — The Government has promised that Mbagathi Way, which is being rebuilt, will be finalised by April. The deadline for completing the the road, which began in August 2005, expired in August 2006, but some works still remain. They include the drainage and a footpath.
Who built Mbagathi Road Nairobi?
Kabuitu Construction Ltd
A contract was recently awarded to the Nairobi-based Ministry of Roads’ category ‘A’ contractor Kabuitu Construction Ltd for Mbagathi Road, a 2km dual carriage road at a cost of Ksh450m (US$5.8m).
What is the depth of concrete road?
The surface course can vary in thickness but is usually between 150 mm (6 inches) (for light loading) and 300 mm (12 inches) (for heavy loads and high traffic).
How many layers does a concrete road have?
The sub-base may consists of any one of the following layers : A layer of well graded soil-gravel mixture of maximum thickness 15 cm. Brick soling with one layer of W.B.M. of maximum total thickness 10 cm. Two layers of W.B.M. of maximum total thickness 15 cm.
What are the four layers of road?
The road pavement structure layers are as follows.
- Subgrade or road bed.
- Sub base course.
- Base Course.
- Surface coarse or wearing course.
What is the thickness of CC road?
A typical CC road pavement consists of 75‐100 mm layer of PCC (1:2:4) over a lean PCC (1:3:6) layer laid over 50‐100 mm sand. Concrete cores have been taken from the CC road pavements to find out the composition of the layers.
What is thickness of WBM?
The WBM Course shall be constructed in layers such that thickness of each compacted layer is not more than 100 mm for grading 1. The compacted thickness of layer shall be 75 mm for grading 2 and grading 3.
How do you calculate cc of a road?
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 RCC road?
Roller compacted concrete (RCC) is a tough, durable type of concrete pavement that is well suited for heavy industrial applications, as well as low-speed roads and arterial roads. Roller compacted concrete draws its name from the construction practices used to place and finish the material.
What are the 3 major structural parts of a roadway?
Components of Road Structure | Methods of Construction of Road Structure
- Sub Grade: Subgrade is the foundation of the road, thus its the lowest and most important component of road structure.
- Sub Base: Consists of:
- Road Base: Due to quality of material used in the road base it is divided into.
- Surfacing:
What is the size of WBM?
Quantity of materials
| Type | Size range, mm | Sieve size, mm |
|---|---|---|
| Coarse aggregate | 63 to 45 mm | 0.91 to 1.07 |
| Stone screening type-B | 11.2 mm | 0.20 to 0.22 for base coarse 0.16 to 0.18 for surface course |
What is the minimum width of WBM road?
In general, for minor or ordinary roads, the thickness of a single compacted layer should be 75 mm and is sufficient.
How do you calculate PCC?
Suppose we have project of making concrete pavement of area 100m2 and slab thickness of PCC is 150 mm. Now we have to calculate dry volume calculating dry volume we should multiply a cofactor 1.54 in wet volume. Mix ratio in M15 grade = 1:2:4 one part cement two part is sand and 4 part is aggregate.