几种工业固体废弃物对土壤的固化作用

以北京某公路施工工地黄土为土样,用矿渣、粉煤灰和脱硫石膏等工业固体废弃物对其进行了固结试验,并对固结土的固化机理进行了探讨。通过正交试验,确定了固结土抗压强度影响因素的重要性排序为石灰掺量粉煤灰掺量矿渣掺量脱硫石膏掺量;当矿渣、粉煤灰、脱硫石膏和石灰的掺量(与土样的质量比)分别为3.6%,0.3%,0.6%和1.5%时,固结土的抗压强度高达6.26MPa。

Solidification of Soil with Industrial Solid Wastes

Taking the soil of a Beijing highway as samples, the solidification tests of Beijing soil with such industrial soil wastes as slag, fly ash and desulfurized gypsum etc.were carried out, and the solidification mechanism of solidified soil was discussed.The influence order of the industrial solid wastes to the compressive strength is investigated by the orthogonal design, showing like lime, fly ash, slag, desulfurized gypsum size down.The compressive strength of solidified soil reached 6.26 MPa when the additive proportion of slag, fly ash, desulfurized gypsum and lime (with the soil samples) was 3.6%, 0.3%, 0.6% and 1.5%.