Xingping City supplies basic grouting materials for secondary equipment

>1. Introduction to high-strength non-shrinkage grouting material
Grouting material
A series of filling grouting materials developed using optimized product manufacturing processes and modern new materials.
It has the characteristics of self-leveling, vibration-free, ultra-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.
2. Cement-based high-strength non-shrinkage grouting material
Mainly used for
reinforcement, anchor bolt anchoring, fixation of nuclear power equipment, reinforcement of road and bridge projects, buried steel bars, concrete structure reinforcement and reconstruction and static piling engineering pile sealing.
, 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.
3. Product Features
Early strength and 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
, strong durability. Thousands of times of fatigue. After being immersed in engine oil, its strength is improved, and it is molded, dense, 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.
IV. Construction steps
Basic treatment: The surface of the foundation of the cleaning equipment must be free of 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, choose the corresponding grouting method. Since it has good flow performance, in general, grouting can be done by the self-weight method, that is, the slurry is poured directly from the formwork opening, relying entirely on the grouting method. The material will level by its own weight and fill the entire pouring space. If the pouring 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 for grouting to ensure that the slurry can fully fill all areas. corner.
. Support 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 for mixing of grouting materials is determined according to the water-to-material ratio recommended on the product certificate. The mixing water should be drinking water. The water temperature should be ~℃. Mechanical or manual mixing can be used. When using mechanical stirring, the stirring time is generally ~ minutes. When using manual stirring, it is advisable to first add / of the amount of water and stir for a few minutes, then add the remaining amount of water and continue stirring until uniform.
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 and enrich the grouting , grouting shall not be carried out from all four sides at the same time.
) After the grouting starts, 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 bleeding is found on the surface during the grouting process, a small amount of dry material can be spread to absorb the water.
) When grouting the foundation of equipment whose grouting layer is thicker than the large volume, you can add grouting material according to the total ratio when stirring 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 damage to 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 water should be sprayed and moisturized immediately after the grouting layer is finally set.
) During winter construction, maintenance measures should also comply with the relevant provisions of the current "Code for Acceptance of Construction of Reinforced Concrete Projects".
) Curing time and mold removal schedule under different temperature conditions
Daily minimum temperature (℃) Mold removal time and curing time
~
~
~

>5. High-strength non-shrinkage grouting
Material packaging and storage
Gray powder, packed in plastic paper bags, net weight kg/bag. The shelf life is 3 months and must be stored in a dry and ventilated room.
6. Reference dosage
The reference dosage is calculated on the basis of / cubic meter to calculate the actual usage.