温度对截距法判定水泥砼路面板块脱空的影响

摘要

通过对试验场内水泥砼板块的温度采集,找出了板顶、板底温度随时间的变化规律和最大温度梯度出现的时间段,得出采用截距法判定脱空应避开的检测时间段.同时通过FWD对试验场内脱空板和非脱空板的弯沉检测,总结出板顶温度对脱空板和非脱空板结果判定的影响.%Through collecting temperature of cement slab in the test site,the variation rule of temperature of both the top and the bottom of slabs with time and the time of the maximum temperature gradient encountered,and the test time intervals have been obtained,which should be avoided when intercept method being adopted to determine void.At the same time,through the FWD test for slabs with voiding and without voiding within the test site,the conclusions on the influence of the temperature of slab top surface in determining the results of voiding have been drawn.