Effects of Moisture on Concrete
What is a bad moisture reading?
Moisture intrusion in concrete structures can lead to severe consequences, affecting the integrity, performance, and durability of the concrete. Measuring the moisture content within the concrete is crucial for assessing its condition and determining if moisture mitigation measures are necessary.
A "bad" moisture reading typically indicates a high level of moisture content in the concrete. This can result from various factors, such as hydrostatic pressure, water leakage, condensation, or faulty construction practices. High moisture levels can significantly impact the concrete's properties and pose potential risks to its long-term performance.
Effects of High Moisture Content on Concrete
- Reduced Durability: Increased moisture content can accelerate the deterioration of concrete due to freeze-thaw cycles, corrosion of reinforcement steel, and leaching of soluble components.
- Structural Damage: Excessive moisture can weaken the concrete's structural integrity, leading to cracking, spalling, and even collapse in severe cases.
- Corrosion of Reinforcement Steel: Moisture can penetrate concrete and come into contact with steel reinforcement bars, initiating corrosion. This can significantly reduce the strength and durability of the steel, compromising the structural integrity of the concrete.
- Efflorescence: Moisture absorbed into concrete can dissolve soluble salts, which migrate to the surface and evaporate, leaving behind white or crystalline deposits.
- Mildew and Mold Growth: High moisture levels provide an ideal environment for mold and mildew growth, which can create health hazards and aesthetic concerns.
It's important to note that the specific threshold for a "bad" moisture reading can vary depending on the specific application and environmental conditions. However, in general, any moisture reading that significantly exceeds the recommended levels or indicates a steady increase over time should raise concerns and warrant further investigation.