Polysaccharide derivatives having an adjusted particle morphology for hydrolytically setting compositions

A method of making a hydraulic setting composition, wherein the composition comprises a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, and, further wherein the method comprises ensuring that the particulate polysaccharide derivative has a median particle diameter DOP (50,3) of at least 38 micrometers and a median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers.

A method of adjusting the lump rating of a hydraulic setting composition, the method comprising the steps of:

• a) providing a hydraulic setting composition which is free of any particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, and
• b) adding a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters having an adjusted median particle diameter DOP (50,3) of at least 38 micrometers and an adjusted median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers to the hydraulic setting composition.

A hydraulic setting composition comprising a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, wherein the particulate polysaccharide derivative has a median particle diameter DOP (50,3) of at least 38 micrometers and a median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers.