广州南沙开发区黄阁东二路道路工程水泥稳定基层技术交底.doc

交底内容：
本工程的道路基层分为两层，下基层为4%水泥稳定石屑，厚15cm；上基层为6%水泥稳定级配碎石，厚35cm。施工工艺要求如下：
一、4%水泥稳定石屑下基层
1、 施工测量：施工前对路基按质量验收标准进行验收。之后，恢复中线，直线段每10～20m设一桩，平曲线段每10～15m，并在两侧路面边缘外0.3～0.5m处设指示桩，在指示桩上用红漆标出基层（或基底层）边缘设计标高及松铺厚度的位置。
2、 备料：根据各路段基层的宽度、厚度及预定的干密度，计算各路段的干燥集料数量。根据混合料的配合比、材料的含水量以及所用车辆的吨位，计算各种材料每车料的数量。也可根据各种集料所占的比例及其松干密度，计算每种集料的松铺厚度，以控制集料施工配合比，而对结合料（水泥）仍以每袋的摊铺面积来控制剂量。各种材料的规格型号为：
A、 水泥：采用32.5普通硅酸盐水泥。
B、 石屑集料：压碎值不小于30%，一般松干容重1500~1600kg/m3，细度模数为3.3~3.5。
C、 拌和用水应采用清洁饮用水。
3、 拌和：
采用现场集中进行集中拌和。拌和时要注意：
在正式拌制混合料之前，必须先调试所用的设备，使混合料的颗粒组成和含水量都达到规定的要求。原集料的颗粒组成发生变化时，应重新调试设备。
拌和中适时测定含水量，含水量应比最佳含水量大0.5~1.0%，如含水量大于最佳时，应进行自然蒸发，使含水量达到最佳值。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