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下大雨对路面铺水泥稳定碎石层有影响

来源:http://www.ycgjglcl.com/ 日期:2022-05-23
水泥被冲走,导致水泥含量降低。细粒被冲走,导致分级不合理。含水量太高,不能压实压实。因此,下大雨时,应防止水泥及混合料在雨中淋湿,下雨时应停止施工,并尽快将铺好的水泥土结构层碾压压实。
The cement is washed away, resulting in a decrease in the cement content. The fine particles are washed away, resulting in unreasonable classification. The moisture content is too high to be compacted. Therefore, in case of heavy rain, the cement and mixture shall be prevented from getting wet in the rain. In case of rain, the construction shall be stopped, and the paved cement soil structure layer shall be rolled and compacted as soon as possible.
水泥稳定碎石的压实度接近密度,强度主要取决于碎石之间的插锁原理,同时有足够的砂浆体积填充骨料的空隙。其初始强度高,强度随年龄增长而迅速形成板状体,因此具有高强度、良好的抗渗性和抗冻性。
The compactness of cement stabilized macadam is close to the density, and the strength mainly depends on the locking principle between macadam. At the same time, there is enough mortar volume to fill the gap of aggregate. Its initial strength is high, and the strength rapidly forms a plate with the increase of age. Therefore, it has high strength, good impermeability and frost resistance.
水泥稳定碎石水泥用量一般为混合料的3%~6%,7天无侧限抗压强度可达5.0Mpa,高于其他路基材料。水泥稳定碎石雨后不浑浊,表面坚实,是高级路面的理想基材。
The cement consumption of cement stabilized macadam is generally 3% ~ 6% of the mixture, and the unconfined compressive strength in 7 days can reach 5.0mpa, which is higher than that of other subgrade materials. Cement stabilized macadam is not muddy after rain and has a solid surface. It is an ideal base material for high-grade pavement.
济南水泥稳定碎石
作为高等级公路的主要组成部分,水泥稳定碎石层是重要的基础结构,其作用:
As an important part of highway foundation, the main function of cement stabilized gravel layer is:
水泥稳定碎石层是硬质路面与土路基的过渡层。它与路面、路基有效结合,形成有机体。
Cement stabilized macadam layer is the transition layer between hard pavement and soil subgrade. It is effectively combined with pavement and subgrade to form an organism.
水泥稳定碎石层具有一定的强度和刚度。高于路基,低于路面,既保证了路面一定的厚度来满足承载荷载,又降低了施工成本。
The cement stabilized macadam layer has certain strength and stiffness. It is higher than the subgrade and lower than the pavement, which not only ensures a certain thickness of the pavement to meet the bearing load, but also reduces the construction cost.
水泥稳定碎石层能将路面上的车辆荷载均匀地分散到路基上,具有一定的韧性。
The cement stabilized macadam layer can evenly disperse the vehicle load on the pavement to the subgrade and has a certain toughness.
水泥稳定碎石层中的砾石和粗砂具有良好的滤水作用,可减少路基积水,降低其承载力。
The gravel and coarse sand in the cement stabilized gravel layer have good water filtering effect, which can reduce the ponding of the subgrade and reduce its bearing capacity.
一般情况下,济南水泥稳定碎石作业完成24小时后,方可铺设边石。与砌筑的时间间隔不宜过长,否则混合料成型为板材后,板材会变硬,增加施工难度,同时也容易破坏板材的整体性通过敲击和凿开盘子。
Generally, the edge stone can be laid 24 hours after the cement stabilized macadam operation in Jinan is completed. The time interval between and masonry should not be too long, otherwise, after the mixture is formed into plates, the plates will harden, increase the construction difficulty, and easily destroy the integrity of the plates by knocking and chiseling the plates.
维护时间不少于7天。在此期间,禁止车辆通行。洒水器每天洒水2至4次,以保持其湿润。
The maintenance time shall not be less than 7 days. During this period, vehicles are prohibited. Sprinklers spray water 2 to 4 times a day to keep it moist.
碎石由反击式破碎机、反击式破碎机或圆锥破碎机生产。禁止使用鳄鱼破碎机进行二次破碎。生产线必须安装除尘设备。碎石加工厂中振动筛的规格有:6mm、11mm、22mm、41mm。碎石技术指标要求密度大于2.6t/m3,破碎值(%)小于25%。
Crushed stone is produced by impact crusher, impact crusher or cone crusher. It is forbidden to use crocodile crusher for secondary crushing. Dust removal equipment must be installed on the production line. The specifications of vibrating screen in gravel processing plant are 6mm, 11mm, 22mm and 41mm. The technical index of crushed stone requires that the density is greater than 2.6t/m3 and the crushing value (%) is less than 25%.
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