廣州南沙開發區黃閣東二路道路工程水泥穩定基層技術交底.doc

交底內容：
本工程的道路基層分為兩層，下基層為4%水泥穩定石屑，厚15cm；上基層為6%水泥穩定級配碎石，厚35cm。施工工藝要求如下：
一、4%水泥穩定石屑下基層
1、 施工測量：施工前對路基按質量驗收標準進行驗收。之后，恢復中線，直線段每10～20m設一樁，平曲線段每10～15m，并在兩側路面邊緣外0.3～0.5m處設指示樁，在指示樁上用紅漆標出基層（或基底層）邊緣設計標高及松鋪厚度的位置。
2、 備料：根據各路段基層的寬度、厚度及預定的干密度，計算各路段的干燥集料數量。根據混合料的配合比、材料的含水量以及所用車輛的噸位，計算各種材料每車料的數量。也可根據各種集料所占的比例及其松干密度，計算每種集料的松鋪厚度，以控制集料施工配合比，而對結合料（水泥）仍以每袋的攤鋪面積來控制劑量。各種材料的規格型號為：
A、 水泥：采用32.5普通硅酸鹽水泥。
B、 石屑集料：壓碎值不小于30%，一般松干容重1500~1600kg/m3，細度模數為3.3~3.5。
C、 拌和用水應采用清潔飲用水。
3、 拌和：
采用現場集中進行集中拌和。拌和時要注意：
在正式拌制混合料之前，必須先調試所用的設備，使混合料的顆粒組成和含水量都達到規定的要求。原集料的顆粒組成發生變化時，應重新調試設備。
拌和中適時測定含水量，含水量應比最佳含水量大0.5~1.0%，如含水量大于最佳時，應進行自然蒸發，使含水量達到最佳值。若含水量小于最
Cards on the table contents:
The road project is divided into two primary, lower primary and 4% cement stabilized stone chips, thick 15cm; on the grassroots of 6% cement stabilized crushed stone, thickness 35cm. Construction Technology requirements are as follows:
1, 4% cement stabilized stone chips to the grassroots
1, construction survey: construction of acceptance before the foundation of quality standards for acceptance. After the restoration of central line, line segment, set a per 10 ~ 20m, flat curve for every 10 ~ 15m, and both sides of the road at the edge of 0.3 ~ 0.5m Office, located outside the pile direction, pile on in the direction marked with red paint grass-roots ( or basal) edge thickness for elevation and pine shop location.
2, stock preparation: According to various sections of the grassroots width, thickness and predetermined dry density, to calculate the aggregate number of drying sections. According to the mixture ratio of water content of the material and the tonnage of vehicles, calculation of various materials, the number of material per vehicle. Can also share a variety of aggregate and loose dry density, calculated for each aggregate thickness of pine shop in order to control the construction aggregate mix, while the binder (cement) Spreading area still bag to control the dose. Specification of various materials are:
A, Cement: ordinary portland cement by 32.5.
B, stone chip aggregate: crushed value not less than 30%, generally loose dry density 1500 ~ 1600kg/m3, fineness modulus of 3.3 to 3.5.
C, mixing water should be used to clean drinking water.
3, mixing:
Mixing with concentrated focus on the scene. Mixing should pay attention to:
Mixture before mixing in the formal, must be used for debugging the equipment, so that the mixture of particle composition and water content of the requirements are achieved. The composition of the original aggregate particles change, should be re-commissioning equipment.
Mixing in the timely determination of water content, water content should be large than the optimum water content of 0.5 to 1.0%, such as the water content is greater than the best, the should be the natural evaporation of moisture so that the best value. If moisture content is less than most
 

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