石灰固化海砂海泥混合料作为填料的室内试验研究

为解决沿海地区缺乏填料的问题,将海砂海泥按质量比1.5∶1进行掺合,将混合料作为填筑材料,采用石灰作为固化剂,开展了一系列室内试验,包括无侧限抗压强度试验、直剪试验以及压缩试验。结果表明,固化混合料的无侧限抗压强度随着石灰掺量增加不断提高,掺量5%~7%之间时,强度变化最明显;7 d养护龄期的混合料的强度约为28 d养护龄期的50%左右,强度增长较为缓慢;石灰掺量大于7%之后,其强度增长速率明显减缓,甚至有减小的趋势;石灰掺量低于5%时固化效果不明显,在7%~9%之间时接近低压缩性土。

Experimental study on lime curing sea sand-mud mixture using as filler

The sea sand and mud are blended as the mass ratio of 1.5:1 and the mixture are planning to use as a kind of filling material. Using lime as curing agent, a series of laboratory tests were carried out, including unconfined compressive strength test, direct shear test and compression test. The results showed that:the unconfined compressive strength of curing mixture increases with the rising content of lime, the strength change most as the lime content between 5%-7%; The 7d strength of the mix is about 50% of 28d and it grows slow; After lime content greater than 7%, the strength of the growth rate has slowed down significantly, and even a decreasing trend; The curing effect is not obvious when the lime content less than 5%,and it is almost a low compression soil when the lime content are between 7%-9%.