(2) should be in the spring and the season of high accumulated temperature construction.
(3) During construction in rainy season, attention should be paid to weather changes to prevent cement and mixture from being rained. Stop construction when it rains, and compact the paved cement-soil structure layer as soon as possible.
(4) The ingredients should be accurate, and the watering, mixing and paving should be uniform. The mixture should be rolled when the optimum water content is +( 1 ~ 2)%, so as to meet the minimum compaction requirement based on the heavy compaction test method. Roller should be light before heavy.
⑤ When the thickness is less than 15cm, choose 12 ~ 15t three-wheel roller for rolling; When the thickness exceeds 20cm, 18 ~ 20t three-wheel roller and vibratory roller shall be selected for rolling. Centralized factory mixing should be selected for urban roads, and the delay time from mixing with water to the end of rolling should not exceed 2 hours. Therefore, cement with initial setting time greater than 3h and final setting time greater than 6h should be selected, and ordinary portland cement and slag portland cement with grades 42.5 and 32.5 should be adopted.
The duration of cement soil road mixing construction, from mixing with water to the end of rolling, should not exceed 3 ~ 4 hours, and should be less than the final setting time of cement.
6. It is forbidden to use thin-layer patch method for leveling.
⑦ Moisturize and preserve health to prevent dryness and dampness.
Today, construction vehicles can slow down during maintenance (
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