Mixing of subbase mixture
The proportion of various materials shall be determined according to the approved mix proportion of Jinan water stabilized concrete subbase, and the mixer shall be used for mixing. Before mixing, the moisture content of aggregates of various specifications in the site shall be tested first, and the construction mix proportion of the day shall be calculated. The actual production mix proportion shall have a better moisture content of more than 0.5%~1% to compensate for the moisture loss during paving and rolling.
Two test personnel shall be arranged at the mixing plant site to conduct inspection at any time. When the aggregate on the aggregate conveyor belt reaches the normal state after starting every day, immediately cut a section of aggregate from the aggregate belt for grading test to check whether the construction grading mix ratio meets the requirements.
After formal production, check the mixing condition every 1-2 hours, check the mix ratio, water content and cement dosage, and timely adjust or stop production in case of any abnormality.
The actual cement consumption during mixing is slightly higher than the design consumption, and the increase value is not more than 0.5%, to offset the impact of the increase in the construction strength dispersion than the design strength dispersion. The metering of water addition shall adopt the flow meter, and the flow value shall be displayed on the control panel in the central control room.
Clean up, inspect and maintain properly after the construction every day, especially pay attention to avoid cement caking and blocking the cement blanking port, and prevent the low cement dosage of the mixture in the production process from affecting the strength of the base course.
Transportation of subbase mixture
The large-tonnage dump truck shall be used for transportation. The tail size of the truck shall meet the requirements of the paver's hopper. The transportation capacity shall match the production of the mixing plant and the on-site paving capacity. When loading, transport vehicles shall be directed to move forward and backward by specially-assigned person. The front part shall be loaded first, then the rear part, and then the middle part to prevent mixture segregation.
The mixture transport vehicle shall be cleaned before loading, and the carriage shall be free of sundries. The mixture shall be covered with tarpaulin completely during transportation to prevent water evaporation and pollution along the way.
The vehicle shall be driven according to the specified route and shall not be driven on the pavement during curing. The vehicle shall not travel too fast to ensure transportation safety. The mixture shall be transported to the paving site as soon as possible to ensure timely, continuous and safe. When backing up, the vehicle shall stop 30cm in front of the paver. When unloading, the vehicle shall be in neutral gear. Pay attention not to hit the paver, and do not unload the material outside the paver.
The grass curtain and geotextile shall be laid at the roadbed slope crossing entering the construction area to prevent the transport vehicles from bringing mud into the working area. At the same time, special personnel shall be arranged to clean the wheel marks at any time to ensure that the lower bearing layer and the paved lower base surface are clean. If there are any other product matters, please come to our website at any time http://www.ycgjglcl.com Consult!