When grouting prestressed pipeline in bridges, turn on the grouting pump to expel grout liquid from the grouting tube, removing air, water, and grout. Grouting can be performed on the bridge's prestressed pipeline once the fluidity of the grout matches that of the mixing trough.
Within 3 days after the prestressed bridge pipeline grouting, the beam and temperature should not be lower than 5°C, and the grouting temperature of the prestressed pipeline should be maintained between 5°C and 30°C; otherwise, appropriate measures should be taken.
Pre-stressed bridge pipe grouting is not suitable for construction at high temperatures (above 35℃), and adding water during construction is prohibited due to insufficient fluidity.
Different medications exhibit varying compensation shrinkage mechanisms. Additionally, using calcium sulfate as the raw material, the performance can vary greatly due to differences in raw materials.
The dosage of the chemical should be appropriate; the concentration of the chemical should not be below the required performance of the grouting material, nor should it be overly controlled. Too little dosage cannot compensate for shrinkage; excessive dosage may lead to cracking of the chemical, resulting in increased manufacturing costs for the grouting material.
Different types of cementitious materials yield varying effects; the performance of additives in silicate cement is superior to that of admixtures. When the content of aluminates or SO3 in the cementitious materials is high, the grouting effect of prestressed pipelines is enhanced. The volumetric effect of偏高岭土 in the blended materials is significant.
Improper construction can lead to cracking or leakage in grouted structures, even when using grouting materials. In terms of leakage in grouting material projects, leakage in the grouting material may be caused by vibration and tamping. Additionally, leakage can occur if the construction of waterproof joints is not handled properly.