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研究了以天然石灰和天然粉石英为基本原料，添加２ＣａＯ·ＳｉＯ_２对合成硬硅钙石型硅酸钙保温材料的影响。结果表明，随着２ＣａＯ·ＳｉＯ_２加入量的逐渐增多，硬硅钙石型硅酸钙保温材料的烘干收缩率逐渐降低；当添加量由０上升到５％时，制品的烘干收缩率由２．１９％降低到０．９２％，制品由不合格变为合格；烘干收缩率降低的原因是２ＣａＯ·ＳｉＯ_２的加入促进了二次粒子形成。
The effect of adding 2CaO · SiO_2 on the synthesis of xonotlite-type calcium silicate insulation with natural lime and natural powdered quartz as raw materials was studied. The results showed that the drying shrinkage rate of xonotlite-type calcium silicate insulation decreased with the increasing of the amount of 2CaO · SiO 2. When the dosage increased from 0 to 5%, the drying shrinkage of 2.19% to 0.92%, the product becomes unqualified qualified; drying shrinkage reduction is due to the addition of 2CaO · SiO 2 to promote secondary particle formation.