porous cement

Methane leakage is observed eventually on sludge digester of concrete structure, because the aperture of the porous formed in the cement condensation is bigger than the diameter of the methane molecule.

混凝土结构的污泥消化池在使用中池体严重泄漏沼气，其原因是水泥凝结时形成的毛细孔孔径远大于甲烷分子直径所致。

Early cylinders were completely filled with a porous filler material consisting of diatomaceous earth, charcoal, asbestos, and cement.

每个钢瓶都彻底填满了由硅藻土、木炭、石棉和水泥组成的多孔渗水材料。

Research on Indoor Shaping Methods of Porous Lean Cement Concrete Used as a Base Material

多孔贫混凝土排水基层材料室内成型方法的研究

The various factors effects on the thermal of porous cement concrete pavement and Portland cement concrete pavement were analyzed.

对影响多孔水泥混凝土路面和普通水泥混凝土路面热效应的各种因素进行了分析。