Improper construction due to insufficient time between each plastering, excessive humidity in the environment, incorrect proportions of plastering material, or errors in the mixing process

Water Seepage Through Concrete Cracks

The main cause of concrete spalling is water seepage or leakage, which leads to the oxidation and rusting of the rebar, causing it to expand. The expanding rusted rebar then pushes against the concrete, resulting in the concrete spalling and cracking, at which point obvious cracks will appear.

Continuous leakage can affect the rebar within the concrete, especially if the concrete is mixed with saline water. This can lead to long cracks spanning across walls or beams, rust stains appearing at the cracks, or spalling due to excessive loads. Timely maintenance and repair work should be arranged to keep the building in good condition.

Common causes include

When the first batch of concrete has fully dried and the second batch is added (the mixture of water and cement powder generates an exothermic reaction), the temperature of the first batch is lower than that of the second batch. Due to the temperature difference, the two batches of concrete cannot bond properly, resulting in cracks

Between two different materials, such as brick and concrete, temperature changes cause contraction and expansion, leading to cracks at the connection points

Due to factors such as excessive load on the concrete, foundation settlement, earthquakes, or human-induced vibrations, the building structure is affected, leading to cracks that compromise safety. A survey to investigate the causes must be conducted, and repairs should be made as soon as possible

When the alkalinity in the cement is too high, the reactive silica components in the sand can undergo a chemical reaction with the alkalis, causing the concrete to expand unevenly and develop cracks

After plastering (applying a cement-lime finish to the walls), it will 'shrink' as it loses moisture. The plaster will shrink with decreasing humidity, causing the wall paint to develop shrinkage marks

Cold Joint

Thermal Joint

Structural Joint

Plastering Issues

Alkali-silica Reaction

Improper Construction

Common features

Cracks spanning
multiple areas

Cracks show
rust stains

Concrete
Spalling

Penetrates effectively into the concrete to a depth of approximately 40mm

Product Selling Points

High
Permeability

Features seamless integration between new and old concrete, effectively repairing damaged concrete

Product Selling Points

Repair
Function

Product Selling Points

Moisture-proof, dust-proof, while also preventing the infiltration of oil, grease, and acidic substances

Barrier
Against
Infiltration

It fully dries and hardens into crystals within 21-28 days, effectively preventing water from seeping into cracks and accumulating beneath the surface

Product Selling Points

Quick
Drying

Short construction period with high cost-effectiveness

Short
Construction
Period

Product Selling Points