Abstract
There are a large number of high liquid limit soil distributed in southern China. As one of the special soils
commonly seen in highway construction, high liquid limit soil cannot be used in subgrade filling directly due to its special
engineering properties. With the idea of saving engineering investment and protecting environment, high liquid limit soil
must be improved to be qualified subgrade filling material. First, detailed laboratory tests are carried out to reveal the special
properties of high liquid limit soil. Then, based on the characters of high liquid limit soil, the improving tests of liquid
plastic limit, unconfined compressive strength, CBR and compaction are completed by adding different percentages of
quicklime and white lime to the high liquid limit soil to study the change in the physical and mechanical properties and
strength. The results show that, after being improved by lime, the high liquid limit soil can be used as subgrade filling of
expressway as its liquid limit, plastic index being reduced, the strength increased and the value of CBR increased remarkably,
and modified effectiveness of quicklime is better than that of white lime. Through comparison and analysis of
the test results, it is found that high liquid limit soil with 5% quicklime can be used as subgrade filling material for highway
since it is not only economical but also qualified to meet the requirement of improvement and strength.
Publisher
Bentham Science Publishers Ltd.
Subject
Building and Construction
Cited by
2 articles.
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