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。水稳水泥用量一般为混合料3%∽7%，7天的无侧限抗压强度可达1.5∽4.0%MPA，较其他路基材料高。水稳成活后遇雨不泥泞，表面坚实，是路面的理想基层材料。

Cement stabilized macadam is made using graded crushed stone as aggregate, filled with a certain amount of cementitious material and sufficient mortar volume to fill the voids in the aggregate, and paved and compacted according to the interlocking principle. Its compaction degree is close to its density, and its strength mainly relies on the interlocking and locking principle between the crushed stones, while there is sufficient mortar volume to fill the voids in the aggregate. It has high initial strength and its strength increases rapidly with age, forming a plate-like structure. Therefore, it has high strength, good impermeability, and good frost resistance. The amount of water-stabilized cement is generally 3% to 7% of the mixture, and its unconfined compressive strength after 7 days can reach 1.5 to 4.0 MPA, which is higher than other subgrade materials. After water stabilization, it remains solid in the face of rain and is an ideal base material for pavement.

水泥稳定碎石基层要求，原材料的质量控制，原材料是路面工程的物质基础，严把材料质量关是保证工程质量的基础和重要环节。混和料的配合比设计通过对工程实际应用的矿料分别进行筛分试验和测定其相对密度，根据各种矿料的颗粒级配和计算用量比调配出合理的级配曲线。现场试验段的施工根据公路路面基层施工技术规范及国内外实践经验，高等级公路路面基层（底基层）施工前采用计划使用的机械设备和初步确定的混和料的配合比铺筑试验段是不可缺少的步骤。混和料的运输，运输混和料宜采用大吨位（15T以上）的自卸运输车，在卸料和运输过程中要尽量避免中途停车和颠簸，以确保混和料的延迟时间和混和料均不产生离析，此时，还要根据运输距离和天气情况，考虑混和料是否采用苫盖，以防水分过分损失及表层散失过大。

Requirements for cement stabilized macadam base, quality control of raw materials, raw materials are the material basis of pavement engineering, and strictly controlling material quality is the foundation and important link to ensure engineering quality. The mix design of the mixture involves screening tests and measuring the relative density of the mineral aggregates actually used in the project. Based on the particle gradation of various mineral aggregates and the calculated dosage ratio, a reasonable gradation curve is formulated. The construction of the on-site test section follows the technical specifications for highway pavement base construction and practical experience at home and abroad. It is an indispensable step to pave the test section using the planned mechanical equipment and the preliminarily determined mix ratio of the mixture before the construction of the high-grade highway pavement base (subbase). For the transportation of the mixture, it is advisable to use dump trucks with a large tonnage (over 15T). During unloading and transportation, it is necessary to avoid stopping and bumps as much as possible to ensure that the delay time of the mixture and the mixture itself do not undergo segregation. At this time, it is also necessary to consider whether to cover the mixture according to the transportation distance and weather conditions to prevent excessive moisture loss and excessive surface loss.

水泥稳定碎石施工首先要把握三个关键环节，把握检测关,每天对原材料级配和含水量、混合料级配和含水量、水泥剂量和粉煤灰含量、压实度和无侧限抗压强度进行检测。把握时间关,由于水稳碎石的结合材料---水泥的固有特性，时间因素对整个施工过程尤为重要，施工中要严密组织、科学控制拌和—运输—摊铺—碾压等各道工序，确保施工一次成功，一般从混合料拌和到碾压结束的时间不超过2小时。把握养护关,养护对水泥稳定碎石基层的强度形成和干缩性影响非常大，所以要充分重视水稳基层的养护工作。派专人负责对已完水泥稳定碎石基层进行养护，养护采用麻袋湿养，养生期不少于14天，养生期间禁止一切车辆通行。

In the construction of cement stabilized macadam, it is crucial to grasp three key aspects: quality control through testing, timely execution, and proper maintenance. Quality control involves daily testing of raw material gradation and moisture content, mixture gradation and moisture content, cement dosage and fly ash content, compaction degree, and unconfined compressive strength. Timely execution is particularly important due to the inherent characteristics of cement, the binding material of water stabilized macadam. During construction, all processes such as mixing, transportation, paving, and rolling must be strictly organized and scientifically controlled to ensure a successful construction. Generally, the time from mixture mixing to the end of rolling should not exceed 2 hours. Proper maintenance is crucial for the strength formation and dry shrinkage resistance of the cement stabilized macadam base. Therefore, special personnel should be assigned to take responsibility for the maintenance of the completed cement stabilized macadam base. The maintenance method involves wetting with gunny bags, and the curing period should not be less than 14 days. During this period, all vehicles are prohibited from passing.