Sika Shantou grouting material high-strength non-shrinkage grouting material secondary cement grouting material

High-strength non-shrinkage grouting material is called high-early-strength non-shrinkage grouting material because of its high early strength, which far exceeds the early strength that cement can achieve, and changes the shrinkage characteristics of traditional Portland cement during curing. It is formulated with high-strength materials as aggregates, high-strength Portland cement as binding agent, supplemented by high fluidity, micro-expansion, anti-segregation, non-chlorination and other substances. Open the bag and add a certain amount of water at the construction site, mix it evenly and then use it. It is mainly used for secondary grouting of equipment cement foundations, reinforcement of bridge columns, and emergency road repair projects.
Characteristics of cement-based secondary grouting materials
. The compressive strength in early and high-strength days can reach above.
.It has high self-flowing properties and can fill all gaps, meeting the requirements of secondary grouting for large equipment.
.Micro-expansion ensures a tight connection between the equipment and the foundation. Micro-expansion does not cause shrinkage after secondary grouting. The bonding strength is high, and the holding force with round steel cannot be lower than that.
. Winter construction can be carried out outdoors at temperatures of ℃.
. High durability. This product is an inorganic cementing material, and its service life is longer than that of the base concrete. There was no significant change in the intensity of the freeze-thaw cycle experiment. The strength is significantly improved after soaking in engine oil.
Uses of high-strength non-shrink grouting material
. Suitable for basic grouting of machine bases, anchor bolts and other equipment.
. Reinforcement, repair and reinforcement of building beams, slabs, columns, foundations, floors and roads.
. Can be used for anchoring anchor bolts and steel bars and structural reinforcement.
. Embedding and fixing of construction joints using reverse driving method in subways, tunnels, underground and other projects.
. And secondary grouting for fixed connections between steel structures (rails, steel frames, steel columns, etc.) and foundations.
The reference usage calculation is based on tons/cubic meter to calculate the actual usage.
There are different types of grouting materials, such as grouting materials, grouting materials, grouting materials, epoxy grouting materials, etc., which are determined according to the standards of different design units
Construction of high-strength non-shrinkage grouting materials Steps: Prepare mixing equipment, grouting equipment, templates and maintenance items, clean the area to be grouted and wet the concrete surface in advance.
, Set up the formwork and seal the joints of the formwork with cement (sand) slurry and plastic tape to ensure no water or slurry leakage.
, Add water and stir according to % of the weight of the grouting material (mechanical stirring for 1 minute, manual stirring for more than 10 minutes)
, Pour the evenly stirred grouting material into the grouting part from one direction. If necessary, bamboo strips or steel bars can be used to guide the flow, and the formwork can be properly vibrated or lightly tapped.
After the construction is completed, it should be covered immediately with plastic film and covered with straw curtains or quilts for a moist and humid curing day.
, The use temperature is ℃ to ℃. It is strictly prohibited to mix any additives or external additives into high-strength non-shrinkage grouting materials.
Maintenance at normal temperature
Before grouting, the daily average temperature should not be lower than ℃. After grouting is completed, curing agent should be sprayed in time or covered with plastic film, and covered with a wet straw bag to keep it moist. When covered with plastic film, the surface of the cement-based secondary grouting material should be covered tightly, and condensation water should be kept in the plastic film. The surface of the grouting material is inconvenient to be cured with water, so a curing agent should be sprayed.
.The grouting material should be kept in a moist state, and the curing time should not be less than a day.
.When using fast-setting and fast-hardening cement-based grouting materials, maintenance measures should be carried out according to the methods required by the grouting material product instructions.
Maintenance in high temperature environment
. Take measures before grouting to prevent the grouting part from being directly exposed to sunlight or other thermal radiation.
.Take appropriate cooling measures, and the temperature of the concrete foundation and equipment base plate in contact with the high-strength non-shrink grouting material should be lower than ℃.
.The temperature of the slurry entering the mold should not be greater than ℃.
After grouting is completed, moisturizing and maintenance measures should be taken in time.
Maintenance in winter environment
For construction in winter environment, if the project does not have special requirements for strength growth, it should be covered with plastic film and thermal insulation material in time after grouting is completed. The initial curing temperature should not be lower than ℃. Do not water randomly when maintaining in negative temperature conditions.
.When the difference between the surface temperature of the cement-based grouting material and the ambient temperature after the formwork is removed is higher than ℃, it should be covered and protected with insulation materials.
.If the ambient temperature is lower than the minimum construction temperature required for cement-based grouting materials or when the strength growth needs to be accelerated, artificial heating and other maintenance methods can be used. The maintenance measures should comply with all provisions of the national standard "Construction Regulations for Winter Period" .