水泥稳定碎石作用原理：水泥稳定碎石是以级配碎石作骨料，采用一定数量的胶凝材料和足够的灰浆体积填充骨料的空隙，按嵌挤原理摊铺压实。其压实度接近于密实度，强度主要靠碎石间的嵌挤锁结原理，同时有足够的灰浆体积来填充骨料的空隙。它的初期强度高，并且强度随龄期而增加很快结成板体，因而具有较高的强度，抗渗度和抗冻性较好。水泥稳定碎石水泥用量一般为混合料3%～6%，7天的无侧限抗压强度可达5.0Mpa，较其他路基材料高。水泥稳定碎石成活后遇雨不泥泞，表面坚实，是高级路面的理想基层材料。水泥稳定碎石均属中粒土

　　Principle of cement stabilized crushed stone: Cement stabilized crushed stone is made of graded crushed stone as aggregate, filled with a certain amount of cementitious material and sufficient mortar volume to fill the gaps in the aggregate, and spread and compact according to the principle of interlocking. Its compaction degree is close to that of compactness, and its strength mainly relies on the interlocking principle between crushed stones, while having sufficient mortar volume to fill the voids of the aggregate. Its initial strength is high, and the strength increases quickly with age to form a board, thus it has high strength, good impermeability and frost resistance. The cement dosage for cement stabilized crushed stone is generally 3% to 6% of the mixture, and the unconfined compressive strength after 7 days can reach 5.0 Mpa, which is higher than other roadbed materials. Cement stabilized crushed stone, after survival, does not become muddy in the rain and has a solid surface, making it an ideal base material for high-grade road surfaces. Cement stabilized crushed stone belongs to medium grained soil

　　水稳施工的要点：1原材料1．I水泥水稳碎石结构层对原材料的要求较高，水泥作为***的一种稳定剂通常情况下使用硅酸盐水泥的稳定效果更好一些。一般采用P．032．5级缓凝水泥，要求水泥初凝时间大于3小时，终凝时间大于6小时，禁止使用快硬水泥、早强水泥。采用散装水泥时，刚出炉的水泥要存放7天以后使用，以保证其安定性合格。夏季高温作业时水泥入罐温度不能高于50℃。1．2碎石对于半刚性基层路面结构，基层要承受荷载，应具有一定的荷载扩散能力。集料自身强度及级配组成都对水泥稳定碎石基层的承载能力有重要的影响。为防止裂缝产生，碎石的质量必须严格要求：(1)碎石应选择含泥量小，颗粒稳定无杂物。(2)碎石应满足级配要求。碎石的级配在满足规范要求范围的同时，要尽可能控制在规范级配范围中值偏下。规范规定级配碎石的比较大粒径不宜大于37.5mm。

　　Key points of water stable construction: 1. Raw materials 1. Cement water stable crushed stone structure layer has high requirements for raw materials, and cement is usually used as a stabilizer for * * *. Generally, the stability effect is better when using Portland cement. Generally, P.032.5 grade retarding cement is used, with an initial setting time of more than 3 hours and a final setting time of more than 6 hours. The use of fast hardening cement and early strength cement is prohibited. When using bulk cement, the freshly baked cement should be stored for 7 days before use to ensure its stability is qualified. During high-temperature operations in summer, the temperature of cement entering the tank should not exceed 50 ℃. 1.2 For semi-rigid base pavement structures, the base layer should bear loads and have a certain load spreading ability. The strength and gradation composition of aggregates have a significant impact on the bearing capacity of cement stabilized crushed stone base. To prevent the occurrence of cracks, the quality of crushed stone must be strictly required: (1) crushed stone should be selected with low mud content, stable particles and no impurities. (2) The crushed stone should meet the grading requirements. The grading of crushed stone should be controlled as much as possible below the median value of the standard grading range while meeting the requirements of the specifications. The standard stipulates that the relatively large particle size of graded crushed stone should not exceed 37.5mm.

　　应尽快将拌和的混合料运送到铺筑现场，混合料在运输过程中必须覆盖，以减少水分损失。如运输车辆中途出现故障，应尽**除，如车内混合料不能在初凝时间内运到工地，或预计混合料到碾压**终完成的延迟时间超过水泥初凝时间，必须予以废弃。5摊铺前应***下卧层表面的浮土、积水等，并将作业面洒水湿润。对于下基层表面，宜喷洒水泥净浆，按水泥质量计，不少于1.0～1.5kg/m2。水泥净浆稠度以能洒布均匀为宜，洒布长度以不大于摊铺机**0～40m为宜。6斜交结构物两侧等摊铺机无法工作的部位采用人工摊铺，应控制好操作时间、松铺厚度和平整度。

　　The mixed material should be transported to the paving site as soon as possible, and the mixture must be covered during transportation to reduce moisture loss. If there is a malfunction in the transport vehicle during transportation, it should be removed as soon as possible. If the mixture in the vehicle cannot be transported to the construction site within the initial setting time, or if the expected delay time for the mixture to be rolled exceeds the initial setting time of the cement, it must be discarded. Before paving, the surface of the underlying layer should be cleaned of floating soil, accumulated water, etc., and the working surface should be moistened with water. For the surface of the lower base layer, it is advisable to spray cement paste, which should not be less than 1.0-1.5kg/m2 based on the quality of cement. The consistency of cement slurry should be evenly distributed, and the spraying length should not exceed 0-40m of the paver. The areas on both sides of the inclined structure where the paver cannot work should be manually paved, and the operation time, loose paving thickness, and flatness should be controlled well.

　　混和料的拌和（1）根据试验确定的配合比，各级料的比例，水泥剂量，比较好含水量均匀、稳定的拌和；（2）根据各级原材料的含水量确定拌和机的加水量，根据施工气温条件调整含水量，调整含水量在比较好含水量基础上提高0.5%-1.0%；（3）当原材料颗粒组成发生变化，应及时调整各冷料仓比例；（4）严格掌控水泥添加剂量，防止水泥用量忽多忽少，不稳定现象；（5）保持拌和机稳定连续生产；（6）拌料过程中安排试验人员对集料含水率和水泥灰剂量进行检测。水泥稳定级配碎石的定义。

　　Mixing of mixtures (1) Based on the experimentally determined mix ratio, proportions of each grade of material, cement dosage, and a relatively uniform and stable water content for mixing; (2) Determine the amount of water added to the mixer based on the moisture content of raw materials at all levels, adjust the moisture content according to the construction temperature conditions, and increase the moisture content by 0.5% -1.0% on the basis of a better moisture content; (3) When the composition of raw material particles changes, the proportion of each cold storage bin should be adjusted in a timely manner; (4) Strictly control the amount of cement added to prevent the fluctuation of cement dosage and instability; (5) Maintain stable and continuous production of the mixer; (6) During the mixing process, arrange testing personnel to check the moisture content of the aggregate and the amount of cement ash. Definition of cement stabilized graded crushed stone.

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