The Develop Testing of Field CBR Testing Tools

Abstract

Today the testing of Field CBR tool takes a long time to setup and unsafe. It might damage the installed tool. The researchers designed the Developed tested Field CBR tool by using iron water drain wide 125 mm, high 65 mm, thick 8 mm, weight 13.4 km/m and length 1,000 mm. Welded the irons that support under the beams and an equipment hold with the beams of 10 wheels truck (about 25 tons). This research analyses discriminations and comparison of working efficiencies of the tools. Duplicated a testing field with laterite and mixed stones among 0 + 075 km to 0 + 550 km of tarry road construction at Ban Rattanaburi – Ban Rawiang Tambol Rattanaburi Amphur Rattanaburi Surin province. Using original tested Field CBR tool, developed tested Field CBR tool, Dynamic Cone Penetrometer (DCP) and Sand cone test to test the road constructional material in each level for 10 times. Keeping samples from testing field to test for engineering basically qualifications in laboratory. This research indicated that the tested CBR tool in testing field with original tool and developed tool were closely values and discrimination of developed tool less than original tool. The developed CBR tool worked faster than the original tool and more safety since having locks stick with the beams, cannot move. The results of this study indicate that the developed Field CBR tool was more convenience, faster, safety and take less time to test than the original Field CBR tool.