This paper has made a thorough study on its properties and delved further into its mechanism of compensation on cement concrete shrinkage by adding concrete expansive agent.

本文通过在普通混凝土中掺加膨胀剂对补偿收缩混凝土的性质进行了研究，并就膨胀剂对混凝土补偿收缩的机理进行了探讨。

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To improve the impermeability of concrete, and reduce cracks in concrete created by the shrinkage, expansive agent is often added.

为了提高混凝土的抗渗性能，以及减免由于混凝土收缩而产生的裂缝，在混凝土中经常加入膨胀剂。

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The double mix of expansion agent and shrinkage-reducing agent is an effective way to reduce the drying shrinkage fall of expansive concrete.

膨胀剂和减缩剂双掺使用是减少膨胀混凝土干燥收缩落差的有效措施。

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