Composition design of cement stabilized crushed stone mixture: Cement, fly ash, stabilized crushed stone, sand, stone chips and other road building materials are used as the cement stabilized crushed stone base. Firstly, the laboratory conducts mix design and compaction experiments through a certain number of raw material tests to determine a relatively high dry density and good moisture content. Then, a test piece is made with this ratio, and the test piece is moisturized and cured for 6 days under the specified temperature conditions. After soaking in water for 1 day, an unconfined compressive strength test is conducted. Heavy compaction test reports such as cement 4%, fly ash 10%, and graded crushed stone 86%. Coarse aggregate (1) crushed stone is produced using impact, impact or cone crushers, and secondary crushing is prohibited using crocodile crushers. The production line must be equipped with dust removal equipment for dust removal. Specification of vibrating screen mesh for crushed stone processing plant: 6mm, 11mm, 22mm, 41mm. (2) The technical indicators of crushed stone require a density greater than 2.6t/m3 and a crushing value (%) less than 25%. Cement stabilized crushed stone can serve as the base layer of the road surface.

混合料的拌和(1)拌和机械的选择：必须选用有电子计量的拌和设备，来保证混合料的级配精度。一般采用产量大于400t／h的拌和机，以保证实际产量能满足摊铺能力，避免“等料”现象，缩短延迟时间。

Mixing of mixture (1) Selection of mixing machinery: Electronic metering mixing equipment must be selected to ensure the grading accuracy of the mixture. Generally, a mixer with a production capacity greater than 400t/h is used to ensure that the actual production can meet the paving capacity, avoid the phenomenon of "waiting for materials", and shorten the delay time.

(2)水稳混合料中的含水量对水稳碎石的强度及裂缝的产生有很大的影响。每天拌和前试验人员应检查碎石的级配、材料的含水量等，并认真填写和下达生产配合比通知单，生产过程中，要根据天气、气温、早中晚等具提因素适时调整加水量。

(2) The water content in the water stabilized mixture has a significant impact on the strength and cracking of the water stabilized crushed stone. Before mixing every day, the testing personnel should check the gradation of the crushed stone and the moisture content of the material, and carefully fill out and issue a production mix proportion notice. During the production process, the water content should be adjusted in a timely manner based on specific factors such as weather, temperature, morning, noon, and evening.

(3)水泥、集料拌和得愈均匀，水稳碎石的强度和稳定性愈高。拌和不均匀会使水泥剂量少的地方强度不足，而水泥剂量多的地方则裂缝增加。因此，在拌和过程中必须专设工程技术人员对拌和全过程进行检查、巡视和旁站，确保混合料的含水量、水泥剂量、级配等能满足要求，以及观察混合料的颜色及水泥、石料的下料情况，保证拌和的顺利和成功。

(3) The more evenly mixed the cement and aggregates, the higher the strength and stability of the water stabilized crushed stone. Uneven mixing will result in insufficient strength in areas with low cement dosage, while cracks will increase in areas with high cement dosage. Therefore, during the mixing process, specialized engineering and technical personnel must be assigned to inspect, patrol, and supervise the entire mixing process to ensure that the water content, cement dosage, grading, etc. of the mixture meet the requirements, as well as to observe the color of the mixture and the cutting of cement and stone materials, to ensure the smooth and successful mixing.

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