CGM-320A支座灌浆料                             

                            

                                一、应用范围 
适用于各种预制梁架设的灌浆，用于支座底板与墩台支承垫石之间灌浆。                             

                            

                                                             

                            

                                二、产品特点                             

                            

                                l 超高的早期强度；优异的流动性；                             

                            

                                l 较长的工作时间；经济性；                             

                            

                                l 密实，无收缩；无锈蚀，不含金属骨料；                             

                            

                                l 施工方便；不含氯化物                             

                            

                                                             

                            

                                三、性能指标                             

                            

                                                             

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

产品型号                                                                                                                                           性能指标	CGM-320A
流动度（mm）	≥320
30min流动度（mm）	≥240
泌水率（%）	0
抗压强度（Mpa）	2h≥20
	/
	28d≥50
	56d不低于28d试验结果
	90d不低于56d试验结果
抗折强度（Mpa）	24h≥10
弹性模量（Gpa）	28d≥30
28d自由膨胀率（%）	0.02～0.1

                            

                                以上数据均在标准试验室控制条件下测得。单位用量：约2200Kg/ m³                             

                            

                                检验依据：科技基［2005］101号 客运专线桥梁盆式橡胶支座暂行技术条件                             

                            

                                                             

                            

                                四、施工方法                             

                            

                                 1、将支座安装于梁底，安装时应使支座的对称中线与梁体底板的对称中线重合，偏差不得大于0.5mm；逐次拧紧支座螺栓，各个螺栓的拧紧程度应基本一致；螺栓紧固完成后，支座与梁体支座板之间不得有间隙。                             

                            

                                 2、将地脚螺栓安装于支座的地脚螺栓孔中，螺栓伸出螺母长度为0.25倍螺栓直径。紧固螺母和套筒螺栓，预防套筒螺栓与支座底面结合处漏浆。                             

                            

                                 3、在支承垫石上标示出纵、横向对称支承中心线。支承垫石表面凿毛，清除留在地脚螺栓孔中的杂物，用水将支承垫石表面浸湿饱和，但施工时不得有明水。然后在支承垫石顶面铺一层20-30mm厚M50干硬性无收缩砂浆并夯实、表面平整，注意砂浆标高应考虑落梁后砂浆的压缩量。清除留在地脚螺栓孔中的杂物，并在梁就位前30min内，在地脚螺栓孔内灌注 CGM-320A至支承垫石顶面以下15mm处。                             

                            

                                 4、浆料按粉料：水=1：0.17(重量比)配制。应先将水加入搅拌桶内，然后逐渐加入称量好的灌浆料，边投料边用电动搅拌枪进行搅拌，直至粉料全部加完，再继续搅拌2-3分钟，使浆料均匀。搅拌好的浆料应在25分钟内灌注完毕。                             

                            

                                 5、落梁时应使支座中心线与垫石顶支座纵、横向对称中心线重合。落梁后应及时对M50干硬性无收缩砂浆进行养护。                            

                            

                                 6、待地脚螺栓孔灌浆材料达到规定强度后，紧固地脚螺栓，拆除支座临时连接板，安装支座密封围板。