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The production of extracellular polysaccharide, EPS WN9, fromPaenibacillus sp. and its suitability as a viscosity modifying admixture for cement mortar mixing were investigated. After 48 h culture in an optimized medium, cell growth and EPS production were 1,2 g/L and 4.0 g/L, respectively. By adding EPS WN9 to mortar, it was possible to prepare a homogeneous mortar without material segregation and...