laitance

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İngilizce - İngilizce
A weak layer of cement and aggregate fines on a concrete surface that is usually caused by an overwet mixture, overworking the mixture, improper or excessive finishing or combination thereof
An accumulation of fine, powdery aggregate particles on fresh cement caused by the upward movement of water; indicates that too much water was used in the mix resulting in poor surface adhesion for a waterproofing layer
A layer of weak and non-durable material containing cement and fines from aggregates, brought by water migrating to the top of over-wet concrete, due to over-working or over-manipulating during finishing
a condition occurring when concrete is mixed too wet, causing cementitious materials to concentrate and leaving portions of the mix cement-poor
laitance