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Introduction to high-strength non-shrink grouting material
b>Grouting material
A series of filling grouting materials developed using optimized product manufacturing processes and modern new materials.
br>It has the characteristics of self-leveling, vibration-free, super early strength, high strength, micro-expansion, anti-shrinkage, anti-penetration, wear-resistance, aging resistance and various functions. Easy to operate and widely used. In the installation of various equipment and emergency repair and reinforcement construction, the application of this product can significantly speed up the project progress and improve the project quality. It can be opened to pedestrians and traffic within a few hours after watering. When the design intensity is reached, the equipment can be installed and operated, and production can be put into operation or resumed in advance.
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Cement-based high-strength non-shrinkage grouting material
Mainly used
:, reinforcement, anchor bolt anchoring, fixation of nuclear power equipment, road and bridge engineering Reinforcement, planting of steel bars, reinforcement and renovation of concrete structures, and pile sealing in static pile pressing projects.
, Equipment installation category. Installation of electromechanical equipment such as power plants, grouting for installation of cement mills in cement plants, grouting for installation of coal mine equipment, installation of tracks and steel structures, secondary grouting of machine bases, steel structures and foundation pockets, and equipment foundations.
, Engineering emergency repair category. Thickening of wall structures and repair of water leakage, collapse grouting of various foundation projects, emergency repair of airport runways, various emergency repair projects, etc., crack management of old concrete structures.
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Product Features
Early strength, high strength. The intensity after pouring can be as high as above, shortening the construction period.
, good self-flowing performance. Just add water and stir on site, then pour it directly into the equipment foundation. The mortar will flow by itself and the construction will be vibration-free, ensuring vibration-free and long-distance grouting construction.
, micro-expansion. The cast body will not shrink after long-term use, ensuring close contact between the equipment and the foundation, no shrinkage between the foundation and the foundation, and appropriate expansion and compressive stress to ensure the long-term safe operation of the equipment.
, anti-oil penetration
and strong durability. Thousands of times of fatigue. After being soaked in engine oil, its strength is increased by more than %, and the molded body is compact, impermeable, and adaptable to oil pollution and environmental protection of the machine base. Test, there is no significant change in the strength of the sub-freezing and thawing environment test.
Good weather resistance. ℃ ~ ℃ long-term safe use.
, low alkali corrosion resistance. Strictly control the alkali content of raw materials, and is suitable for projects that require inhibition of alkali aggregate reactions.
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Construction steps
Basic treatment: Clean the surface of the equipment foundation, and there should be no gravel, laitance, dust, oil, release agent and other debris. Before grouting, the surface of the equipment foundation should be fully moist. Before grouting, the accumulated water should be absorbed.
According to the actual situation of the equipment base, select the corresponding grouting method: Due to its good flow performance, under normal circumstances, grouting can be done by the self-weight method, that is, the slurry is poured directly from the formwork opening, completely relying on The grout will level by itself and fill the entire grouting space. If the grouting area is large, the structure is particularly complex, or the space is small and far away, high funnel grouting or pressure grouting can be used to ensure that the grout can be fully filled. Every corner.
. Formwork support: Set up the formwork according to the determined grouting method and grouting construction drawings. The positioning elevation of the formwork should be at least higher than the upper surface of the equipment base. The formwork must be supported tightly and firmly to prevent loosening and grout leakage.
. The amount of water to be added when mixing the grouting material is determined according to the water-to-material ratio recommended on the product certificate: drinking water should be used for mixing, and the water temperature should be ~℃. Mechanical or manual stirring can be used. When using mechanical stirring, the stirring time is generally ~ minutes. When using manual stirring, it is advisable to add the required amount of water first and stir for a few minutes, then add the remaining amount of water and continue stirring until uniform.
Grouting: The following requirements should be met during grouting construction:
) The slurry should be poured from one side until it overflows from the other side, so as to facilitate the discharge of the air between the equipment base and the concrete foundation. The grouting should be sufficient and grouting should not be carried out from all four sides at the same time.
) After grouting begins, it must be carried out continuously without interruption, and the grouting time should be shortened as much as possible.
) It is not advisable to vibrate during the grouting process. If necessary, bamboo slats, etc. can be used for pulling and diversion.
) The thickness of the grouting layer should not exceed each time.
) Grouting for longer equipment or track foundations should be carried out in sections. The length of each section is appropriate.
) If there is bleeding on the surface during the grouting process, spread a small amount of dry material to absorb the water.
) When grouting the foundation of equipment whose grouting layer is thicker than the large volume, you can add stones according to the total ratio: when mixing the grouting material, but it needs to be tested to determine whether its groutability can meet the requirements.
) Equipment foundation grouting
After completion, the parts to be removed should be processed before the grouting layer is finally set.
) During the grouting construction process and before demoulding, the grouting layer should be protected from vibration and collision to avoid damaging the unhardened grouting layer.
) The horizontal distance between the formwork and the equipment base should be controlled to the left and right to facilitate grouting construction.
) If grout running occurs during grouting, it should be dealt with in time.
) When the equipment foundation grouting volume is large, mechanical stirring should be used to ensure grouting construction.
, Maintenance
) Within minutes after the grouting is completed, the curing agent should be sprayed immediately or covered with plastic film and covered with rock wool quilts for maintenance, or the grouting layer should be sprinkled with water to moisturize and maintain immediately after the grouting layer is finally set.
) During winter construction, maintenance measures should also comply with the relevant provisions of the current "Construction Acceptance Code for Reinforced Concrete Projects" (B).
) Curing time and formwork removal schedule under different temperature conditions
Daily minimum temperature (℃) Formwork removal time () Curing time ()
~
~
~

High-strength non-shrink grouting
Material packaging and storage
br>Gray powder, packed in plastic paper bags, net weight kilogram bags. The shelf life is 3 months and must be stored in a dry and ventilated room.
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Reference usage
br>The reference usage calculation is based on tons cubic meters to calculate the actual usage.