凿毛

通过30组混凝土立方体试块，分别对人工凿毛及劈拉试验试件的断开面两种类型分别采用自制量测仪法与灌砂法进行了粘结面粗糙度测试研究。

Based on the test results of 30 specimens of concrete interfacial roughness former by chipping with hammer and by splitting , a roughness instrument for measuring concrete interface is put forward , which is simple and cheep .

在改扩建工程中遇到在倾斜度近60°的斜面经过凿毛的老混凝土表面上，浇筑厚度仅20cm的钢筋混凝土的施工问题。

During the course of project rebuilding and extension , construction problems in pouring a layer of reinforced concrete of 2 ? cm in thickness on the old one are often encountered on the 60 ° slope .

在二期混凝土施工区域，为免除人工凿毛劳动强度，采用永久性免拆金属模板网作为一期混凝土模板；

To avoid manual labor of chiseling-grossness , in the area of second-stage concrete construction , permanently non-removed metal molding boards nets are used as molding boards of first-stage concrete .

试验证明，免拆模板网用在一、二期混凝土中可以代替人工凿毛工艺。

It has proved by the experiment that the non - removal mesh form can replace the manual roughing on concrete surface in the first and second stage concrete construction .

并对改进方案的有效性进行了试验研究，具体内容如下：（1）在钢筋混凝土梁表面凿毛后粘贴碳纤维布，然后在每隔一定间距的位置设置螺栓加固。

Experiments are designed to verify the effectiveness of the improvement . The study details : ( 1 ) Stick CFRP to the surface of reinforced concrete beams . Then set reinforcement bolt on the beams .

结果表明剪应力在支点区域较大，跨中较小，采用人工凿毛处理的叠合面理论上可不配置抗剪钢筋，就能保证叠合式板梁桥的整体工作性能。

The results show that the shear stress is biggish in the fulcrum area and less in the mid-span . Theoretically there is no need to place shear resistant steel-bar on artificial chiseling combined interface to assure the whole working-performance of laminated plate-girder bridge .

结果表明，YJ-302不凿毛时的界面粘结力高于水泥净浆和107胶水泥浆，能保证道面获得较好的粘结力，使道面完全结合。

The result indicates that YJ 302 bond has the interface felt more strongly than the cement slurry and the 107 glue cement slurry when the old pavement is not chiseled . The YJ 302 provides the pavement to be bond well and makes the pavement be combine entirety .