Abstract: Provided are a gypsum hardened product and a method for producing the same, whereby, in bubble-containing gypsum hardened products of the same density and the same average bubble size, strength of the gypsum hardened product can be enhanced by controlling a coefficient of variation of bubble size. A gypsum hardened product containing bubbles, wherein a density of the gypsum hardened product is 0.4 g/cm3 or more and 0.8 g/cm3 or less, and in the gypsum hardened product, an average bubble size is 200 ?m or more and 600 ?m or less, and a coefficient of variation of bubble size is 0.30 or more and 0.48 or less.

Abstract: Provided are a bubble-containing gypsum slurry and a method for producing the same, whereby, in bubble-containing gypsum slurries of the same specific gravity, a bubble size in the gypsum slurry can be increased with a small amount of a foaming component. A bubble-containing gypsum slurry containing, a hydraulic powder containing gypsum, water, the following component (A1), optionally the following component (A2), and the following component (B), component (A1): an alkyl or alkenyl sulfate or a salt thereof, component (A2): one or more selected from surfactants other than component (A1), and component (B): a nonionic compound with a Log P of 0 or more and 3.0 or less, wherein a mass ratio of a content of component (B) to a total content of components (A1) and (A2), (B)/[(A1)+(A2)], is 0.05 or more and 0.5 or less.

Abstract: A foaming agent composition for hydraulic compositions incudes component (A1): one or more selected from the group consisting of an alkyl sulfate having an alkyl group with 8 or more and 10 or less carbons, a salt thereof, an alkenyl sulfate having an alkenyl group with 8 or more and 10 or less carbons, and a salt thereof; component (B): a monohydric alcohol with 6 or more and 10 or less carbons; and optionally, component (A2): one or more surfactants other than the component (A1). A mass ratio of a content of the component (A1) to a total content of the components (A1) and (A2), (A1)/[(A1)+(A2)], is 0.8 or more and 1 or less.

Abstract: Provided are a rheology modifier and a method for modifying water rheology for imparting thixotropy and viscosity to water, and a slurry composition having high viscosity and excellent resistance to separation in water and a method for producing such a slurry composition. A rheology modifier containing: (A) a sulfate or a salt thereof having a hydrocarbon group with 12 or more and 22 or less carbon atoms and an average number of moles of added alkylene oxide of 0 or more and 25 or less; and (B) a fatty acid alkanolamide having a fatty acid moiety with 10 or more and 22 or less carbon atoms.