改良土二次掺灰工艺的石灰剂量检测方法

公路建设中路床和路基部分大量使用了石灰(或水泥)改良土，为了保证改良土中含灰量达到设计要求，需要在不同时间检测改良土的灰剂量，为适合二次掺灰工艺，提出了EDTA标准液消耗量随时间降低的标准曲线，把它应用于宁淮高速公路路基改良土现场灰剂量检测中，得到了合理的测试结果。结论对改进灰剂量检测方法和控制工程质量有重要意义。

Detecting method for lime content in the two-step lime mixing technology of stabilized soil

In expressway construction, lime or cement stabilized soils are widely used in subgrade section, and the detection of lime content should be performed frequently so as to ensure the lime content satisfying the design requirement. In this paper, a standard titration curve reflecting the reduction of the consumption of EDTA standard fluid with time is proposed for the two-step lime mixing technology and applied to field detection of lime content in stabilized soils of subgrade of the Ninghuai Expressway, and the detected results are reasonable. Conclusions drawn in this paper are of great significance to improvement of the detecting method of lime content and guarantee of project quality.