TƯƠNG QUAN GIỮA CHỈ SỐ CBR VÀ CIV TRONG XÁC ĐỊNH SỨC CHỊU TẢI NỀN ĐƯỜNG TRÊN ĐẤT BAZAN KHU VỰC TÂY NGUYÊN

Abstract

The California Bearing Ratio (CBR) test is used to evaluate the capacity bearing of road pavement. CBR test has been widely used in Vietnam and in the world as well. However, this test requires relatively high cost and time-consuming. Thus, Clegg Impact Soil Tester (CIV) which is simple and lightweight structure, cost-effective, time-saving, and high accuracy, has been developed to replace the CBR test in some countries. In order to meet the requirements of design and inspection standards of the road, it is necessary to find a correlation between the CBR and CIV indexes. In this study, both CBR and CIV tests are carried out on the road base in Dak Nong province under the same experimental conditions. By comparing the test results, a correlation between the CBR and CIV values is proposed, CBR=2,024e^0,085CIV. This correlation could be considered to apply for similar geological conditions.