目的 研究硫铝酸盐基土壤固化剂固化土的安定性、凝结时间、冻融循环性能,为公路工程提供一种新型土壤固化剂.方法 土壤取用北方常见土(黑土、黄土),按照《土壤固化剂标准》( CJ/T 3073- 1998)和《公路工程无机结合料稳定料试验规程》(JTJ057- 94)的相关要求测试土壤固化剂对固化土的安定性、凝结时间、冻融循环性能.结果 两种固化土经安定性试验,表面均完好无损.凝结时间试验中,黑土固化土强度损失9.2％,黄土强度损失8.92％,强度损失均小于l0％.结论 两种固化土安定性与凝结时间均符合相关标准要求.固化土经冻融循环后,与同类产品相比质量损失小,强度损失优于同类.固化土经安定性测试和冻融循环测试后,抗冻能力优于单独冻融循环.若在低温下施工,建议在早期改善养护条件、减短凝结时间、增长养护龄期,可以更好地达到固化土相关标准要求.%This paper aims at the research on the solidified-soil,which be solidified by sulphoaluminate base soil stabilizer,soundness,setting time,freeze-thaw cycles performances for providing a new soil stabilizer for Highway Engineering. The soil what we used is the northern common black soil and loess, and accordance with"the CJ/T 3073-1998 Soil stabilizer"and"JTJ057-94 Test Methods of Materials Stabilized with Inorganic Binders for Highway Engineering "of the relevant requirements of the soil stabilizer for the solidified-soil test of soundness, setting time, freeze-thaw cycles performances. Two kinds of solidified-soil surface are intact by soundness test. The strength loss of black soil solidified-soil was 9. 2% and the strength loss of loess was 8.92% by setting time test,both less than 10% strength loss. Two kinds of solidified-soils soundness and setting time were all in line with relevant standards. Solidified soil after the freeze-thaw cycles comparing with the same kind products, quality loss and strength loss were less than the similar. The freezing capability of solidified soil was superior to the separate freeze-thaw cycles after the soundness testing and freeze-thaw cycles testing. If in low temperature construction, it is recommended to improve the early curing conditions to improve the setting time and increase the curing age,which can better achieve solidified soil in the related standard requirements.
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