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(一一六)为什么使用轻质多孔保温材料要控制含水率?屋面、墙体和容器等的保温,多用轻质多孔保温材料。它的主要优点是质轻、多孔、导热系数低、保温绝热性能好,但是,它们的吸水性都很强,极易吸收外界和空气中的水分,使含水率增大,例如,将膨胀蛭石在相对温度为95～100%的环境下经受24小时后,吸湿率可达1.1%。保温材料含有水分,会影响导热性能,水分含量的增长会导致导热系数增大,使保温绝热性能
(16) Why use lightweight porous insulation materials to control the moisture content? For insulation of roofs, walls, and containers, light porous insulation materials are used. Its main advantages are light weight, porous, low thermal conductivity, and good insulation and heat insulation properties. However, their water absorption is very strong. They can easily absorb moisture from the outside world and the air and increase the moisture content, for example, will expand. When the stone is subjected to a relative humidity of 95 to 100% for 24 hours, the moisture absorption rate can reach 1.1%. Insulation material contains moisture, which will affect the thermal conductivity. The increase of moisture content will lead to the increase of thermal conductivity, so that the thermal insulation performance