Due to the individualization of family, their gathering place in a house has been changing from a Living room to a Dining-kitchen. In this research, we survey family's communication style in their house. At the same time, we examine "Center-kitchen" that has the promotional communicating function for the future fireside place of family. It is not the most important point if people use Center-kitchen or not, but its image is, "the space where each family member can have a good communication and has enough space not to disturb family's activity." In the family who use Center-kitchen, we can see that everyone naturally help housework, they share the good time in the kitchen, and having meals together is becoming the most important time for their life. Center-kitchen hasn't been valued because people are distressed about arrangements. Although kitchen is becoming opened-space today, most of people still think it is an occupied space by housewives or women. However, since Center-kitchen satisfies people's food-centered life, an influence of physical aspect is compensated. It is predicted each family's life style will be diversified from now on, and at the same time, the concept of how kitchen should be will be variously changed. We need to notice an importance of choosing the most suitable kitchen for each family.

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　本研究は硬化コンクリートを粉砕し，圧縮成形を行なうことで，骨材の選別・分別等を行わずに成形体としての再生を試みたものである．成形体の圧縮強度性状の把握と強度改善方法および体積制御方法の検討，また成形中に粉体に生じる現象の観察を行なった．検討の結果，コンクリートのみを粉砕して単に成形した場合，成形体の強度は不十分であるが，スラッジやセメントペーストとの置換や炭酸化処理等により成形体の強度向上が可能であることを確認した．成形圧力の増加によっても強度向上は期待できる．また成形前の粉末に対して適切な乾燥処理を行うことで，水分移動による成形体の体積変化を制御可能であることを示した．

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