PROBLEM TO BE SOLVED: To provide an artificial soil material or artificial pumice stone by manufacturing a porous lightweight sintered foamed body using waste glass, clay and waste material-utilized woody charcoal as raw materials.SOLUTION: A method of manufacturing the porous lightweight material is carried out by kneading the waste glass powder, clay powder, the woody charcoal powder and a foaming agent with water, granulating the kneaded product and then firing the granule. A layered nearly spherical body is formed because the energy transfer of each material occurs by heat of firing in foaming step occurs and then the clay useful for the growth of plant gathers to the outside, the glass gathers in the middle and the woody charcoal gathers in the center to form layer distribution.COPYRIGHT: (C)2007,JPO&INPIT【課題】廃ガラスと粘土と廃材利用木質炭を原料にして多孔質軽量の焼結発泡体を製造し、人工土壌材ないし人工軽石を実現する。【解決手段】廃ガラス粉体と粘土粉体と木質炭の粉体と発泡剤とを水で混練し造粒した後、焼成することを特徴とする多孔質軽量材の製造方法である。焼成熱によって発泡時に各物質のエネルギー移動が起こるため、外側に植物の栽培に有用な粘土質が集中し、中間にガラス質が集中し、中心に木質炭が集中して層分布が生じた層状のほぼ球状体となる。【選択図】 図2
