传统的保温砂浆是以膨胀珍珠岩为骨料。 因膨胀珍珠岩吸水率很高、脆性大、粘结强度低、抗裂性差，应用受到了很大的局限。

• The aggregate of traditional insulation mortar is pearlite, which has high water absorbing capacity, high brittleness, low bond strength and poor crack resistance, so its application have been restricted in some fields.