防渗土料在压实后，应具有足够的防渗性能和一定的抗风化能力。
After debulked, the material must be strong enough in antiseepage and resisting weathering.
对其性能测试表明，其主要指标超过了普硅325水泥的要求，其主要缺点是抗风化能力较差，不适于地表工程。
A performance test show that the material has indexes exceeding with the requirement of 325 Portland cement but a shortage of poor weather resistance, which makes it unfit to use for ground works.
长沙地区红砂岩层以软硬岩交互沉积而成，其软岩具有强度低、抗风化能力差、遇水软化和失水崩解等特殊力学性质。
The special mechanical properties of the soft layer has low strength, weak resistance to weathering, soften by water and collapse after losing water.
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