As a new type of filling materials, the aerated concrete has the features of low density, low strength, good absorption of water and great contraction.

加气混凝土作为一种新型的墙体填充材料，具有容重小、强度低、吸水率高，收缩性大等特性。

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Oxman estimates that making concrete columns this way with low-density porous concrete in the center could reduce the amount of concrete needed by more than 10 percent, a significant savings on the scale of a construction project.

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