When constructing fiber slurry seal in hot weather, special attention should be paid to the control of materials, construction technology and environmental conditions to ensure construction quality and durability. The following are key considerations:
1. Material selection and processing
Asphalt emulsifier type: slow-cracking and fast-setting emulsified asphalt is preferred to avoid premature demulsification at high temperatures, which affects paving and molding.
Fiber stability: Select high-temperature resistant fibers (such as polyester and lignin fibers) to prevent fiber deformation or degradation at high temperatures.
Aggregate requirements: Aggregates must be clean and dry. Avoid using highly absorbent materials (such as porous basalt) at high temperatures to prevent rapid evaporation of moisture and cause the mixture to become brittle.
Additive adjustment: Retarder or thickener can be added to delay the demulsification time of emulsified asphalt and improve high-temperature workability.

2. Construction time control
Avoid extreme high temperature periods: Try to construct in the early morning or evening (during periods with lower daytime temperatures) and avoid high temperatures at noon (such as air temperature > 35°C or ground temperature > 50°C).
Monitoring environmental conditions: Real-time monitoring of air temperature, wind speed and humidity. High wind speed will accelerate water evaporation, and the interval between paving and rolling needs to be shortened.
3. Mixture ratio and transportation
Adjustment of water-cement ratio: Appropriately increase the amount of water (but avoid excessive use to prevent strength reduction) to compensate for high-temperature evaporation losses.
Mixing temperature control: The discharge temperature of the mixture should not be too high (generally ≤50℃). During transportation, a tarpaulin should be covered to prevent sun exposure and shorten transportation time.
4. Paving and rolling process
Fast paving: The demulsification of slurry mixtures is accelerated at high temperatures, and the paving time needs to be shortened to ensure continuous operation.
Timing of initial compaction: Initial compaction should be carried out immediately after paving (such as before demulsification), and a light steel wheel roller should be used to avoid the mixture from being difficult to compact after hardening.
Avoid excessive compaction: The mixture is easy to compact at high temperatures, and excessive compaction may cause aggregate crushing or uneven fiber distribution.
5. Maintenance management
Closed traffic: High temperature molding is fast, but sufficient maintenance time (at least 4 to 6 hours) is still required to avoid early wheel adhesion or damage.
Moisturizing maintenance: Spray mist water to cool and moisturize when necessary (especially in windy and dry weather) to prevent surface cracking.
6. Safety of construction workers
Heat protection measures: Provide sunshade, water replenishment and rotation of work to prevent construction workers from heat stroke.
Equipment protection: Check the cooling system of equipment such as pavers and rollers to prevent high temperature failures.
7. Emergency preparation
Sudden weather: Pay attention to weather forecasts and prepare emergency plans for rain protection (such as sudden thunderstorms that require covering and protecting unformed pavement).
Material reserve: Prepare enough water and retarder on site to deal with the problem of too fast solidification of the mixture.
8. Summary
The core of construction in high temperature weather is to control material stability, optimize process timeliness, and strengthen maintenance management. By adjusting the ratio, strictly controlling the construction window period and fine operation, the impact of high temperature on the quality of fiber slurry seal can be effectively reduced. If conditions permit, it is recommended to verify the parameters through a test section before large-scale construction.