Common Defects in Concrete – Causes and Effects ✳️Concrete is a strong and durable construction material, but poor workmanship, improper mix design, or inadequate curing can lead to several defects that affect performance and durability. Understanding these defects helps engineers maintain better quality control on site. 1. Honeycombing Voids or cavities in concrete caused by poor compaction or insufficient vibration, resulting in weak concrete and possible exposure of reinforcement. 2. Segregation Separation of aggregates from the cement paste, usually due to excess water or improper handling, leading to a non-uniform and weak mix. 3. Bleeding When water rises to the surface of fresh concrete due to a high water–cement ratio, creating a weak and porous surface layer. 4. Cracks Concrete cracks may occur due to shrinkage, thermal stresses, overloading, or poor curing, which can reduce durability and structural performance. 5. Spalling Chipping or breaking of the concrete surf...
Gul Bahar Shah
Gul Bahar Shah
Key Function points of
AHU
FAHU
TFAHU
1. AHU – Air Handling Unit
Function:
Handles indoor air only. It recirculates air from inside the building, conditions it (cooling or heating), filters it, and supplies it back into the rooms.
Key Points:
Mostly uses return air from inside the building.
Limited fresh air.
Used in malls, offices, hospitals, airports.
Main job: temperature and humidity control.
2. FAHU – Fresh Air Handling Unit
Function:
Dedicated for fresh outside air. It takes 100% outdoor air, filters it heavily, cools it (or heats), and then supplies it into the building.
Key Points:
Takes only outdoor air.
Used where indoor air quality needs to be high.
Helps maintain oxygen level and positive pressure.
Often works together with AHU.
3. TFAHU – Treated Fresh Air Handling Unit
Function:
An upgraded version of FAHU. It not only cools and filters outdoor air but also dehumidifies and treats it to a higher standard before supplying.
Key Points:
100% fresh air.
Better filtration and moisture control than FAHU.
Popular in hot and humid regions like GCC countries.
Ensures fresh air with controlled humidity for energy efficiency and comfort.
hashtag#AHU hashtag#FAHU hashtag#TFAHU hashtag#HVAC hashtag#HVACSystems hashtag#FreshAirSystem
hashtag#BuildingManagement hashtag#MEP hashtag#MechanicalSystems hashtag#IndoorAirQuality
hashtag#FacilitiesManagement hashtag#FMIndustry hashtag#BMS hashtag#BuildingServices
FAHU
TFAHU
1. AHU – Air Handling Unit
Function:
Handles indoor air only. It recirculates air from inside the building, conditions it (cooling or heating), filters it, and supplies it back into the rooms.
Key Points:
Mostly uses return air from inside the building.
Limited fresh air.
Used in malls, offices, hospitals, airports.
Main job: temperature and humidity control.
2. FAHU – Fresh Air Handling Unit
Function:
Dedicated for fresh outside air. It takes 100% outdoor air, filters it heavily, cools it (or heats), and then supplies it into the building.
Key Points:
Takes only outdoor air.
Used where indoor air quality needs to be high.
Helps maintain oxygen level and positive pressure.
Often works together with AHU.
3. TFAHU – Treated Fresh Air Handling Unit
Function:
An upgraded version of FAHU. It not only cools and filters outdoor air but also dehumidifies and treats it to a higher standard before supplying.
Key Points:
100% fresh air.
Better filtration and moisture control than FAHU.
Popular in hot and humid regions like GCC countries.
Ensures fresh air with controlled humidity for energy efficiency and comfort.
hashtag#AHU hashtag#FAHU hashtag#TFAHU hashtag#HVAC hashtag#HVACSystems hashtag#FreshAirSystem
hashtag#BuildingManagement hashtag#MEP hashtag#MechanicalSystems hashtag#IndoorAirQuality
hashtag#FacilitiesManagement hashtag#FMIndustry hashtag#BMS hashtag#BuildingServices
- Get link
- X
- Other Apps
- Get link
- X
- Other Apps
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