Bài viết Đánh giá vai trò của phụ gia polyme trong việc gia cố đất bằng xi măng để nâng cao sức chịu tải nền đường sắt giới thiệu những kết quả nghiên cứu bước đầu về việc sử dụng phụ gia polyme trong gia cố nền đường sắt bằng xi măng trên đoạn tuyến Hà Nội – Đồng Đăng, đây là đoạn tuyến xuất hiện nhiều vị trí nền đường bị phá hoại do đất có độ trương nở lớn, sức chịu tải kém. | Transport and Communications Science Journal Vol 72 Issue 5 06 2021 660-671 Transport and Communications Science Journal ASSESSMENT OF THE ROLE OF POLYMER ADDITIVE IN TRACK BED REINFORCEMENT BY CEMENT IN IMPROVING THE BEARING CAPACITY Tran Quoc Dat1 Nguyen Thanh Minh1 Trong Kien Duong2 1 University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam 2 University of Transport Technology No 3 Trieu Khuc Street D. Thanh Xuan Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 08 03 2021 Revised 25 05 2021 Accepted 27 05 2021 Published online 15 06 2021 https Corresponding author Email dattq@ Tel 0904895218 Abstract. The application of inorganic binders in soil reinforcement has been widely used in traffic construction in Vietnam. On the other hand polymer materials are also used in civil construction and in the production of construction materials for example the polymer additives used in cement-reinforced soil are also initially researched to pilot on some rural roads. However the application of inorganic polymer additives in railway reinforcement with respect to its practical characteristics of working conditions and load has not been carried out in Vietnam yet. Here we introduces the first research on the use of polymer additive in the railway reinforcement by cement on the Hanoi - Dong Dang route where many locations of the bed of railway are damaged due to the large swelling of the soil and poor bearing capacity. Based on the experimental studies in the laboratory on soil samples taken at the bed of track the effect of polymer additives on the improvement of physical and mechanical properties related to the bearing capacity of railway bed has been evaluated. From that we proposed the suitable mixture of cement content and polymer additives in order to improve the bearing capacity of the railway bed in the studied area to achieve the specified technical standards. Keywords track bed polyme admixture .
