The effects of compaction delay and environmental temperature on the mechanical and hydraulic properties of lime-stabilized extremely high plastic clays

摘要: Abstract A comprehensive experimental programme was performed with the focus on assessing effects of compaction delay and ambient temperature physical, mechanical hydraulic properties lime treated expansive clays. Specimens were mellowed for a period 0, 3, 6, 12, 24 48 h at two different temperatures 20°C 40°C prior to being compacted, tested and/or cured up 28 days evaluating impacts long-term strength development. All specimens prepared same dry unit weight 12.16 kN/m3 moisture content 40% except tests aimed determining as function mellowing period. The results revealed that duration increased declined remarkably both within first 12 h. In addition, higher reduction rate observed when 40°C. 97% in swelling pressure obtained compacted upon mixing (zero hour period) left cure 24 h testing. Permeability coefficient clays by 40 times delayed or showed relatively stable values permeability over measurement which could be attributable accelerated pozzolanic reaction. Unconfined Compressive Strength is significantly affected delay. An increase 234% 282% achieved after no respectively. Gradual gain observable post but becomes slower independent mixing. suggested four key reaction mechanisms occur concurrently 12–24 h addition recognized most crucial time. Damaging cementitious compounds harmful restraining potential