新闻动态
纤维混凝土的养生与填缝问题
钢纤维混凝土进行养护，使混凝土中拌合料有良好的水化、水解强度发育条件以及防止收缩裂缝的产生。采用潮湿养生方法。混凝土表面整修完毕后，立即进行养生，用20～30mm厚的湿砂覆盖于混凝土表面。每天均匀洒水数次。养护时间由试验确定，以混凝土达到28d强度的80%以上为准。养护期满即可采用改性沥青填封接缝。填缝时接缝保持清洁、干燥，填缝料应与缝壁粘附紧密、不渗水，灌注高度一般比板面低2mm左右。
The steel fiber reinforced concrete (SFRC) is maintained so that the mixtures in concrete have good hydration, hydrolytic strength development conditions and prevent shrinkage cracks. The method of moist health preservation was adopted. After the concrete surface is repaired, the concrete surface is cured immediately and covered with 20-30 mm thick wet sand. Sprinkle water several times a day evenly. The curing time is determined by the test, and the concrete strength up to 80% of 28d is taken as the criterion. Modified asphalt can be used to fill the joint after the curing period. When filling, the joints should be clean and dry. The filling materials should adhere closely to the seam wall without seepage. The filling height is generally about 2 mm lower than that of the plate surface.
钢纤维的养护时间一般约为14～2ld.混凝土宜达到设计要求，且在养护期间和封缝前，禁止车辆通行，在达到设计强度的40说后，方可允许行人通行。其养护方法一般有两种方法：
The curing time of steel fibers is generally about 14-2ld. Concrete should meet the design requirements. Vehicles are forbidden to pass during the curing period and before sealing seams. Pedestrians can only be allowed to pass after reaching the design strength of 40. There are generally two ways to maintain it:
1. 湿治养生法，这是最为常用的一种养护方法。即是在混凝土抹面2h后，表面有一定强度，用湿麻袋或草垫，覆盖物还兼有隔温作用，保证混凝土少受剧烈的天气变化影响。在规定的养生期间，每天应均匀洒水数次，使其保持潮湿状态。
1. Hygrotherapy is the most commonly used method of maintenance. That is, after 2 hours of concrete plastering, the surface has a certain strength, using wet sacks or straw mats, covering also has the function of insulation, to ensure that concrete is less affected by severe weather changes. During the prescribed period of health, water should be sprinkled several times a day evenly to keep it moist.
2. 塑料薄膜养生法，即在混凝土板做面完毕后，均匀喷洒过氯乙烯等成胰液使形成不透气的薄膜保持膜内混凝土的水分，保湿养生。但注意过氯乙烯树脂是有毒、易燃品，应妥善护。
2. Plastic film curing method, that is, after the concrete slab is finished, the pancreatic juice such as perchloroethylene is sprayed evenly to form an impermeable film to keep the moisture content of the concrete in the film and keep it moist and healthy. However, it should be noted that perchloroethylene resin is toxic and inflammable and should be properly protected.
进行旧水泥混凝土路面修复方案选择时，须考虑行车要求和经济要求等，因地制宜，选择经济可行的方法。吕东线通过比选采用钢纤维混凝土加铺层做修复罩面，修复工程竣工已有一年多，路面状况良好，应用效果值得推广。加热施工式封缝料常用的是沥青橡胶封缝料，也可采用聚氯乙烯胶泥和沥青玛蹄脂等。
When choosing the repairing scheme of old cement concrete pavement, we should consider the driving requirements and economic requirements, and choose the economical and feasible method according to local conditions. It has been more than one year since the repair project was completed, and the pavement is in good condition. The application effect is worth popularizing. Asphalt rubber sealant is commonly used in heating construction sealant, and polyvinyl chloride cement and asphalt horseshoe grease can also be used.
常温施工式封缝料主要有聚氨脂封缝胶、聚硫脂封缝胶以及氯丁橡胶类、乳化沥青橡胶类等常温施工式封缝料。
The normal temperature construction sealants mainly include polyurethane sealant, polysulfide sealant, chloroprene rubber, emulsified asphalt rubber and other normal temperature construction sealants.
目前已广泛使用滑动模板摊辅机建筑混凝土路面。这种机械尾部两侧装有模板随机前进，能兼做摊铺、振捣、压入杆件、切缝、整面和刻划防滑小槽等作业，可铺筑不同厚度和宽度的混凝土路面，对无筋或配筋的钢纤维混凝土均可使用。
At present, sliding formwork booster has been widely used to construct concrete pavement. This kind jiaoguan.89ix.comtongdiao.71ix.comof mechanical tail is equipped with formwork to advance randomly. It can be used for paving, vibrating, handan.71ix.cnrejinsu.37ix.com.cntiaoyafa.89ix.compentuguan.89ix.compressing rods, cutting joints, whole surface and cutting anti-skid grooves. It can pave concrete pavement of different thickness and width. It can be used for steel fiber reinforced concrete without reinforcement or reinforcement.
The steel fiber reinforced concrete (SFRC) is maintained so that the mixtures in concrete have good hydration, hydrolytic strength development conditions and prevent shrinkage cracks. The method of moist health preservation was adopted. After the concrete surface is repaired, the concrete surface is cured immediately and covered with 20-30 mm thick wet sand. Sprinkle water several times a day evenly. The curing time is determined by the test, and the concrete strength up to 80% of 28d is taken as the criterion. Modified asphalt can be used to fill the joint after the curing period. When filling, the joints should be clean and dry. The filling materials should adhere closely to the seam wall without seepage. The filling height is generally about 2 mm lower than that of the plate surface.
钢纤维的养护时间一般约为14～2ld.混凝土宜达到设计要求，且在养护期间和封缝前，禁止车辆通行，在达到设计强度的40说后，方可允许行人通行。其养护方法一般有两种方法：
The curing time of steel fibers is generally about 14-2ld. Concrete should meet the design requirements. Vehicles are forbidden to pass during the curing period and before sealing seams. Pedestrians can only be allowed to pass after reaching the design strength of 40. There are generally two ways to maintain it:
1. 湿治养生法，这是最为常用的一种养护方法。即是在混凝土抹面2h后，表面有一定强度，用湿麻袋或草垫，覆盖物还兼有隔温作用，保证混凝土少受剧烈的天气变化影响。在规定的养生期间，每天应均匀洒水数次，使其保持潮湿状态。
1. Hygrotherapy is the most commonly used method of maintenance. That is, after 2 hours of concrete plastering, the surface has a certain strength, using wet sacks or straw mats, covering also has the function of insulation, to ensure that concrete is less affected by severe weather changes. During the prescribed period of health, water should be sprinkled several times a day evenly to keep it moist.
2. 塑料薄膜养生法，即在混凝土板做面完毕后，均匀喷洒过氯乙烯等成胰液使形成不透气的薄膜保持膜内混凝土的水分，保湿养生。但注意过氯乙烯树脂是有毒、易燃品，应妥善护。
2. Plastic film curing method, that is, after the concrete slab is finished, the pancreatic juice such as perchloroethylene is sprayed evenly to form an impermeable film to keep the moisture content of the concrete in the film and keep it moist and healthy. However, it should be noted that perchloroethylene resin is toxic and inflammable and should be properly protected.
进行旧水泥混凝土路面修复方案选择时，须考虑行车要求和经济要求等，因地制宜，选择经济可行的方法。吕东线通过比选采用钢纤维混凝土加铺层做修复罩面，修复工程竣工已有一年多，路面状况良好，应用效果值得推广。加热施工式封缝料常用的是沥青橡胶封缝料，也可采用聚氯乙烯胶泥和沥青玛蹄脂等。
When choosing the repairing scheme of old cement concrete pavement, we should consider the driving requirements and economic requirements, and choose the economical and feasible method according to local conditions. It has been more than one year since the repair project was completed, and the pavement is in good condition. The application effect is worth popularizing. Asphalt rubber sealant is commonly used in heating construction sealant, and polyvinyl chloride cement and asphalt horseshoe grease can also be used.
常温施工式封缝料主要有聚氨脂封缝胶、聚硫脂封缝胶以及氯丁橡胶类、乳化沥青橡胶类等常温施工式封缝料。
The normal temperature construction sealants mainly include polyurethane sealant, polysulfide sealant, chloroprene rubber, emulsified asphalt rubber and other normal temperature construction sealants.
目前已广泛使用滑动模板摊辅机建筑混凝土路面。这种机械尾部两侧装有模板随机前进，能兼做摊铺、振捣、压入杆件、切缝、整面和刻划防滑小槽等作业，可铺筑不同厚度和宽度的混凝土路面，对无筋或配筋的钢纤维混凝土均可使用。
At present, sliding formwork booster has been widely used to construct concrete pavement. This kind jiaoguan.89ix.comtongdiao.71ix.comof mechanical tail is equipped with formwork to advance randomly. It can be used for paving, vibrating, handan.71ix.cnrejinsu.37ix.com.cntiaoyafa.89ix.compentuguan.89ix.compressing rods, cutting joints, whole surface and cutting anti-skid grooves. It can pave concrete pavement of different thickness and width. It can be used for steel fiber reinforced concrete without reinforcement or reinforcement.
