Em-Hydrotec Engineering LTD

19/09/2025

Na here we dey

01/08/2025

COMPONENTS OF ROAD PAVEMENTS

The road components are crucial for insuring road durability, each part of the road plays a vital role in road section. Understanding these components and their functions helps in maintaining effective road performance
In general term, road pavement is applied to the whole construction of road, but the pavement can be classified as:-

A. Flexible pavement.
B. Rigid pavement.

Here is an overview of the typical structure of the road pavements.

FLEXIBLE PAVEMENTS
1. Sub-base : The sub-base for a flexible pavement is laid directly onto the formation level and should consist of a well compacted granular material such as a quarry or crushed stone. Its role is to spread load evenly on the subgrade.

2. Subgrade: The subgrade is the natural soil or prepared surface which supports the entire pavement structure. It is covered with a sub-base, a base course and a wearing course.
The main function of the subgrade is to give adequate support to pavement and stability under loading conditions.

3. Base course: The base course of the surfacing can consist of rolled asphalt, dence tarmacadam or dence bitumen macadam. Base course which lies below the surface may consists of crushed stone or slag.
This course ensure efficient distribution of the traffic loading and sub surface drainage.

4. Surface course : The surface course or wearing course is usually laid by machine and provides the water protection for the base layers .
It should also have non- skid properties, reasonable resistance to have good riding properties and have a good life expectancy.
Materials which give these properties include hot asphalt, bitumen macadam, dence tar surfacing.

LAYER THICKNESS
The image shown below doesn't reflect the actual layer thickness for each pavement.
These are only general guidelines, and actual thickness may vary depending on the specific project requirements, local regulations, and design specifications.

Here is a general breakdown of a typical thickness for each layer in a pavement construction.
1. Surface Course : 25-100 mm (1-4 inches)
2. Base Course : 100-300 mm (4-12 inches)
3. Subbase Course : 100-500 mm (4-20 inches)
4. Subgrade : Variable, but typically compacted to a thickness of 300-600 mm (12-24 inches) or more, depending on the soil conditions and design requirements

22/04/2024

. *Hot sale 🔥*

Over 150 Sharp plots of land along the Tarred Road Located *at Ogbaku*
Good for any Purposes...

Very Sharp and Hot 🔥

Price: *2.5m* per plot

Book for inspection now let's close the deal 🤝

28/03/2024

15/08/2023

Today's Teaching!!!

Here is Fidel Castro. Former president of Cuba. He was the loudest voice against western aggression. He sent over 20 thousand Cuban soldiers to Angola to fight colonialism for free . He died at age 90 after surviving over 200 assassination attempts. Teach your kids about Fidel. History will never forget Fidel Castro.

08/08/2023

This is pure Engineering

08/07/2023

08/07/2023

Is it true that "highlight" is the new thing to boost your notification. Oya let's do it. Press @ and click highlight, they said it gives more followers.

09/05/2023

Sweet Deal 🔥
Sharp 10 plots of land strategically located in a fast developing environment at Avu off ph-road owerri for sale.
Title: power of attorney
Price: 3.5m per plot
Note : Only minimum of five (5) plots can be sold . An opportunity that doesn't come always here in Owerri, very affordable 08066562566, after now the price will not remain the same so rush let's close this deal

09/05/2023

Hot Sale!!!🔥 Two storey building of 6 flats of 3 bedroom and 1 storey building of 4 flats of 2 bedroom together in the same compound. Total of 10 flats at Spibat with steady power supply. Well fenced with gate. Title: C of O *Price: 85M net* An opportunity to own, you Can buy and resale with a huge profit here in Owerri, very affordable 08066562566

09/05/2023

An opportunity to own a property here in Owerri, very very affordable, this type of opportunity doesn't come always. Change in price !
👇
Distress sale!
Oji ya n’ olu bad 🔥
Fenced and gated building consisting of
* Three (3) bedrooms upstairs
* Four (4)self contained downstairs
This house is located in a cool environment at umuonyealiugo mbieri by spilbat owerri
Title: power of attorney
Price: 25m last price (not negotiable)
Rush now 08066562566

09/05/2023

An opportunity to own a property here in Owerri, very affordable 08066562566. Price: 6m each