{"id":9669,"date":"2022-02-13T11:49:23","date_gmt":"2022-02-13T11:49:23","guid":{"rendered":"http:\/\/141.23.68.248\/wp\/?page_id=9669"},"modified":"2022-03-07T07:05:04","modified_gmt":"2022-03-07T07:05:04","slug":"flexible-pavement","status":"publish","type":"page","link":"http:\/\/141.23.68.248\/wp\/?page_id=9669","title":{"rendered":"Flexible Pavement"},"content":{"rendered":"

RISK-BASED ASSESSMENT & SYSTEMS CONDITIONS.<\/strong><\/p>\n

Risk-Based Assessment<\/a><\/p>\n

The research problem area for this assessment is the deterioration of asphalt pavement during its lifetime. The design life of traditional asphalt pavement is 15 years, and the long-life pavement with a moderate increase of pavement strength and asphalt mixture base thickness can obtain 50 years or more of service life, and here we assume that its life is 20 years. We need to establish various models to study the deterioration of asphalt pavement with time, including self-deterioration and deterioration caused by external factors.<\/p>\n

\"b1\"<\/a><\/p>\n

The results show that the repair strategy we implemented increases the probability that the pavements will remain in “good” condition. However, this probability is only a little over 40%, although it is higher than that in other states. We can increase this possibility by exploring\u00a0various maintenance scenarios. Of course, at this point, another decision that engineers can make is to relax the maintenance plan in order to reduce costs.<\/p>\n

LIFE CYCLE ANALYSIS & MULTI-CRITERIA DECISION MAKING.<\/strong><\/p>\n

LCA & MCDA<\/a><\/p>\n

The main goal of the assessment is to do a carbon footprint analysis.\u00a0The research object here is the wearing layer of pavement, mainly discussing four design options (hot mix asphalt (HMA) overlay, chip seal, slurry seal, and crack seal) in the whole life cycle (raw material, manufacturing, and placement, transport, maintenance, and repairs) and released greenhouse gases and harmful gases (mainly CO2, SO2, NOx) on the natural environment.<\/p>\n

The below\u00a0figure represents the scope and the boundaries of the assessment:<\/p>\n

\"b2\"<\/a><\/p>\n

The design alternatives are as depicted below:<\/p>\n

\"b3\"<\/a><\/p>\n

Life Cycle Timelines:\u00a0<\/strong>In the road life cycle schedule, we assume that the road will be put into use on 01.01.2022, and its service life will be 25 years. In order for the road to achieving the expected service life, it is designed in the following four schemes to maintain the road, but each scheme also has its own life cycle. In order for each protective layer to normally play the role of protecting the road surface, the following interventions are required regularly.<\/p>\n