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水泥穩(wěn)定碎石層施工技術交底記錄.doc

更新時間: 2024-02-29
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所屬欄目: 路橋技術交底
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資料簡介

交底內容:
1、 待下層4%水泥石屑穩(wěn)定層經驗收合格后,在其上鋪筑35cm6%水泥穩(wěn)定級配碎石層。
2、 水泥碎石穩(wěn)定層應用12噸以上的壓路機碾壓。
3、 必須飽濕養(yǎng)生,不使穩(wěn)定碎石基層表面干燥,也不應忽干忽燥。
4、 用于水泥碎石基層的碎石,其壓碎值不大于30%,硫酸鹽含量不超過0.25%,有機質含量不大于2%。最大粒徑不超過37.5mm(方孔篩)。
5、 集料拌和時的含水量比最佳含水量大0.5%~1.0%,以補償施工過程中水份的蒸發(fā);并保證和后的含水量稍高于最佳含水量,以彌補碾壓過程中水分的損耗。
6、拌和好的混合料盡快攤鋪,做到自第一次拌和機內加水至完成壓實工作的時間不超過3小時,并不小于終凝時間。
7、不同施工段的銜接處,采用搭接處理,前一段拌和整形后,留5~8m不進行碾壓,后一段施工時,前段留下未壓的部分再加適量水泥重新拌和,并與后一段一起碾壓。

Cards on the table contents:
1, to be 4% lower stable layer of cement stone chips after their acceptance, in its last paving 35cm6% cement stabilized gravel layer.
2 Application stable layer of cement 12 tons of gravel over the roller compacted.
3, must be full wet curing, do not make stabilized gravel surface dry and should not suddenly dry suddenly dry.
4, cement gravel gravel, crushed its value is not greater than 30%, sulfate content of no more than 0.25%, organic matter content of not more than 2%. Maximum diameter of no more than 37.5mm (square hole sieve).
5, when the water content of aggregate mixing water content than the best large 0.5% to 1.0%, to compensate for evaporation of water during construction; and guarantee and after the water content slightly higher than the optimum water content, to make up for rolling process of water loss.
6, mixing a good mix paving as soon as possible, so that the first time since the mixing machine with water to complete the compaction work time is not more than three hours, not less than the final setting time.
7, the interface between different construction office segment, using lap treatment, before a plastic mixing, the remaining 5 ~ 8m without RCC, after a period of construction, leaving no pressure part of the preceding plus appropriate cement re-mixing, and with with time after rolling.

 

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