Provided herein are defoaming agents that comprise lecithin and a solvent. Optionally, they may comprise hydrophobic particles. One embodiment provides a defoaming agent that comprises lecithin and a solvent.

 
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> Ultra high strength fiber-reinforced cement composition, ultra high strength fiber-reinforced mortar or concrete and ultra high strength cement additives

> Very fast setting cementitious composition with high early-age compressive strength
~ 00585