Bài viết Đánh giá tính chất cơ học của cấp phối đá dăm gia cố xi măng có trộn thêm cốt liệu cao su ở phòng thí nghiệm và ngoài hiện trường được nghiên cứu nhằm góp phần thúc đẩy sử dụng cốt liệu cao su được nghiền từ lốp xe phế thải trong xây dựng đường, góp phần hạn chế các vấn đề môi trường do lốp xe phế thải gây ra. | Transport and Communications Science Journal Vol 73 Issue 8 10 2022 735-751 Transport and Communications Science Journal MECHANICAL PROPERTIES OF CEMENT-TREATED BASE MATERIALS INCORPORATING RUBBER AGGREGATES FROM LABORATORY EVALUATION TO FIELD EXPERIMENT VALIDATION Pham Ngoc Phuong1 Nguyen Van Tai1 2 Tran Thi Thu Thao1 1Facultyof Road and Bridge Engineering The University of Danang University of Science and Technology 54 Nguyen Luong Bang str. Danang Vietnam 2Binh Minh General Consulting Co. Ltd. 68 Pham Tuan Str. Quang Ngai Viet Nam ARTICLE INFO TYPE Research Article Received 26 07 2022 Revised 04 10 2022 Accepted 10 10 2022 Published online 15 10 2022 https Corresponding author Email pnphuong@ Tel 84983577027 Abstract. Incorporating rubber aggregates grinding from end-of-life waste tires into cement- based materials could help improve the resistance of the composites to shrinkage cracking. However few studies were found on rubber aggregate incorporation into cement-treated base materials. This study added rubber aggregates size 1-3 mm to cement-treated aggregates type Dmax25 4 cement at different contents of 1 2 and 5 by weight of dry graded aggregates. These rubberized cement-treated materials were then assessed in the laboratory to determine fundamental mechanical properties. Two pavement segments were also constructed using the composites incorporating 0 and 2 rubber aggregates. The results showed that the cement-treated base materials contained 0 1 and 2 rubber aggregates that met the mechanical properties requirements for pavement bases. In addition two transverse cracks 1 mm wide and 3 25 m long appeared in the reference cement-treated base without rubber aggregates 30 days after the pavement was paved whereas the one incorporating rubber aggregate was still intact. This observation demonstrated that rubber aggregates could help the cement-treated base reduce shrinkage and limit resulting cracking. The research .
