Rehabilitation of Existing base course by Pavement Recycling Process For Wangthong – Khek Noi section of Highways No. 12

Abstract

The objective of this research is to study the appropriate quantity of cement and mixing ratio of soil cement and crushed rock to rehabilitate the damage soil cement base on Wangthong – KhekNoi section of Highways No.12 by cold in – place recycling process. To obtain the require unconfined compressive strength (UCS) in accordance with the standard of The Department of Highways, for 4 mixing forms (soil cement : crushed rock) of 100 : 0, 75 : 25, 50 : 50 and 25 : 75 together with 3 – 7% of Portland Cement Type 1 were used to mix 144 samples. The sample were cured for 1, 3, 5, 7, 14 and 28 days and tested. The 50 : 50 proportion of soil cement : crushed rockand 4% of Portland Cement Type 1 at 5 days curing time yielded unconfined compressive strength of more than 24.50 Kilogram Per Square Centimeter (ksc) .