What is the difference between a grout press and a grout

The grouting agent (material) has the excellent properties of micro-expansion, no shrinkage, large flow, self-compacting, extremely low water secretion rate, high filling, thin and small diameter of the airbag foam layer, high strength, rust prevention and rust resistance, low alkali and chlorine-free, high adhesion, and green environmental protection. It does not contain oxides, chlorides, sulfites and nitrites and other harmful components to steel bars, and is refined and compounded by high-performance plasticizers, surfactants, calcium silica micro-expansion agents, hydration heat inhibitors, migratory rust inhibitors, nano-scale mineral silicon-aluminum-calcium-iron powder, stabilizers, or refined and compounded with low-alkali and low-heat Portland cement.

The grouting material is made of high-strength material as aggregate, cement as binder, supplemented by high fluidity, micro-expansion, anti-segregation and other substances. It can be used after adding a certain amount of water to the construction site and stirring it evenly. The grouting material has good self-flowing, fast hardness, early strength, high strength, no shrinkage, and micro-expansion; Non-toxic, harmless, non-aging, non-polluting to water quality and surrounding environment, good self-tightness, rust-proof and other characteristics.

In terms of construction, it has the advantages of reliable quality, reduced cost, shortened construction period and convenient use. Fundamentally change the force of the equipment base, so that it can evenly bear the full load of the equipment, so as to meet the installation requirements of various mechanical and electrical equipment (heavy equipment high-precision grinding machines), and is an ideal grouting material in the era of padless installation.

The grouting agent is a high-efficiency expansion agent component, the addition amount is about 10% of the amount of cement, the grouting material contains the grouting agent, which can be directly used in the grouting without adding cement and other materials.

Summary. <>

Hello dear, there are two kinds of grouting:

1. Lining grouting is used to compact the stressed body between the tunnel wall and the primary lining, the primary lining and the second lining.

2. Tension grouting, grouting in the bellows after the steel strand of the prestressed beam is tensioned, which is used to compact the pipe, fix the steel strand, and help the steel strand to be stressed.

There are mainly these two, and there are many others, but the amount is too small.

What is grouting and what is the role of grouting

Hello, there are two kinds of grouting: first, lining grouting, grouting between the tunnel wall and the initial lining, the initial lining and the second tease lining, used to compact the stressed body. Second, tension grouting, in the prestressed beam strand tensioned in the bellows after the grouting is used to compact the brother spike pipe, fix the steel strand and change the line, help the steel strand force and so on are mainly these two, there are a lot of others, but the amount is too small.

So, what is the role.

The role of kissing and grouting is as follows: 1It can prevent surface deformation, tunnel grouting can effectively prevent surface deformation, because if the shield diameter of the tunnel is greater than the outer loose diameter of the lining of the tunnel, when the shield advances, a ring gap will be formed between the lining of the shield tail and the soil layer, and after a long time, the soil layer will be squeezed into this gap, which will lead to the deformation of the surface at this time, and it will be very dangerous if the jujube excavation does not avoid this situation, so we need to fill this gap with suitable materials. Avoid deformation of the ground surface.

2.Reduce the settlement of the tunnel, because as we mentioned above, the segment will have a gap between the segment and the land, resulting in the loss of support under the segment, because the weight of the segment itself will lead to sinking, which will affect the original good axis stool, and after grouting can make the segment lie on the grouting material, which seems to have a cushion, which can prevent the tunnel from settling and ensure the quality of the axis of the tunnel.

The grouting here refers to the grouting of textiles, and what is its function.

Kissing, mainly to increase the weaveability.

So how to choose the slurry components?

The aim is to enhance the frictional strength of the yarn and reduce the friction of the machine.

Formula: 75 kg PVA 20 kg acrylic glue 15 kg emulsified oil 8 kg slurry volume 750 liters solid content 12% slurry viscosity Keb 8-9 seconds on the remaining slurry rate 12-14%.

Kiss, it depends on what kind of textile it is.

Good. Hello, has the question of the foundation been clearly answered for you? If you have any new confusion, please feel free to find me again, and I will answer it for you as soon as possible. I wish you all the best!

Summary. 1. Different uses of grouting materials are used for secondary grouting of equipment foundations, anchor bolt anchoring and reinforcement planting, reinforcement and repair of concrete structures, and reinforcement projects for beam and column cross-section increase. It is suitable for places that require relatively high early strength, including light machine floor support, crane track and pillar foundation, and can also be used as an excellent reinforcement grouting material for masts, anchors, etc.

The grouting material is suitable for the hinge pouring of new hollow slab bridges; pouring repair of cracks with a crack width greater than 3mm in concrete structures; Basement, garage and other cement concrete floor hollow filling sealing, waterproof plugging or outer steel reinforcement. 2. Product characteristics: Different grouting material product characteristics: 1. Good fluidity:

The initial fluidity is greater than 300mm, and the fluidity can also be customized for two models; 2. Simple construction: excessive water consumption will not lead to settlement and water leakage, ensuring the uniformity of materials and construction; 3. Plastic expansion: the slurry begins to expand after the mixing is completed, which perfectly compensates for the plastic shrinkage caused by water evaporation;

The difference between grouting and grouting.

1. Different uses of grouting materials are used for secondary grouting of equipment foundations, anchor bolt anchoring and reinforcement planting, reinforcement and repair of concrete structures, and reinforcement projects for beam and column cross-section increase. It is suitable for places that require relatively high early strength, including light machine floor support, crane track and pillar foundation, and can also be used as an excellent reinforcement grouting material for masts, anchors, etc. The grouting material is suitable for the hinge pouring of new hollow slab bridges; pouring repair of cracks with a crack width greater than 3mm in concrete structures; Basement, garage and other cement concrete floor hollow filling sealing, waterproof plugging or outer steel reinforcement.

2. Product features: Different grouting material product features: 1. Good fluidity: the initial fluidity is greater than 300mm, and the fluidity can also be customized for two models; 2. Simple construction:

Excessive water consumption will not lead to sedimentation and water leakage, ensuring material uniformity and construction; 3. Plastic expansion: the slurry begins to expand after the mixing is completed, which perfectly compensates for the plastic shrinkage caused by water evaporation;

4. Later expansion: composite expansion mechanism, late expansion (expansion after hardening) under closed conditions to ensure that the steel bar and the sleeve are firmly connected; 5. Early strength and high strength: the strength of 3 days can reach the strength of ordinary grouting material for 28 days, and the final strength can reach more than 100MPa; 5. Green environmental protection:

The sleeve grouting material is non-toxic, tasteless, non-polluting, non-combustible components, and has no harm to the environment and operators. Characteristics of grouting products: 1. The interface bonding strength with the old concrete is greater than the strength of the concrete body; 2. High strength and toughness, the compressive strength can reach more than 60MPa in 28 days, and the impact toughness can reach more than 5 times that of ordinary high-strength concrete; 3. High fluidity and permeability, no segregation and water secretion, self-flowing dense molding, and can penetrate into concrete cracks;

4. Excellent frost resistance, aging resistance, anti-corrosion and anti-rust; 5. There is no shrinkage in the hardening process, and it is anti-cracking and seepage-proof; 6. The construction operation is simple, and no large-scale construction equipment is required; 7. The application mode is flexible, and the method of net slurry, mortar or concrete can be used according to the specific situation.

This is my answer, I hope it is helpful to you, thank you.

When preparing the bridge grout material for grouting, turn on the grouting pump to discharge the slurry from the grouting pipe and remove air, water and slurry. When the flow of the discharged slurry is consistent with the flow in the stirring tank, the bridge grout can be started. The maximum pressure of bridge grout should generally not be exceeded.

The grouting should reach the fullness and slurry discharge at the other end of the pipeline, and should reach the exhaust hole to discharge the slurry with the same fluidity as the Guisen Suifeng. After closing the slurry outlet, a stabilization period of not less than 5min should be maintained, and the stabilization period should not be less than 5min. For continuous beams or when carrying out pressure grouting, let the water in the pipe.

The slurry suspension flows freely from the outlet end. Pump the slurry again until there is a homogeneous slurry flowing out at the outlet end, and keep it under pressure for 5min. This process can be maintained 1-2 times.

After the bridge grouting material is pressed, it should be decided whether to refill according to the compacting situation of the slurry, and the grouting hole must be completely compacted. Bridge grouting vacuum-assisted grouting process: Before the bridge grouting material is grouted, vacuum should be carried out to make the vacuum degree in the hole.

Stabilize between. After the vacuum degree is stable, the valve at the grouting end of the pipeline should be opened immediately, and the pump should be turned on at the same time for continuous grouting of the bridge grout. Grouting sequence: first down and then up, the same pipeline grouting is carried out continuously, and it is completed at one time.

After the final tensioning is completed, the bridge grout must be carried out as soon as possible, generally not more than 48h.

Within 3 days after the bridge grouting and grouting of the bridge, the temperature of the beam and the ambient temperature shall not be less than 5, and the slurry temperature of the bridge grouting material shall be kept between 5 and 30, otherwise measures should be taken to meet the requirements.

Bridge grout is not suitable for construction under high temperature conditions (above 35). It is forbidden to add additional water during the construction process due to insufficient fluidity.

Under low temperature conditions (more than 5), chloride ions and nitrites should not be contained when antifreeze is used in bridge grouts.

1. The influence of the variety of slurry.

Different varieties of expansion agents have different compensating shrinkage mechanisms. The expansion agent with aluminite as the expansion source may also have great differences in performance due to different raw materials.

2. The influence of the amount of slurry content.

The dosage of expansion agent should be appropriate, and the dosage of expansion agent should not be less than the lowest dosage that meets the performance requirements of the grouting material, nor should it be higher than the high control dosage. The amount of expansion agent is too small to achieve the purpose of compensating for shrinkage; If the amount is too large, it may cause the grouting material to crack with expansion agent, and it will increase the manufacturing cost of the grouting material.

3. Cementitious material.

The influence of the breed.

Different varieties of cementitious materials have different effects of expansion agents. Portland cement in pure clinker.

The effect of mixing expansion agent is better than that of cement with mixed materials; When the aluminate content or SO3 content in the cementitious material is high, the effect of the slurry is better. Among the mixed materials, metakaolin has a good volume stabilization effect.

Before the grouting products were not popularized, many customers directly mixed the cement with an appropriate amount of expansion agent and water for grouting, the fluidity of the mixed cement slurry is not high, the slurry compactness is not enough, and it is easy for Wang Shen to appear uneven grouting of pores, empty slurry, leakage and other phenomena, and the grouting products have improved the product performance ,..

The cement can reach the corresponding strength standard, but the cement is easy to sink, affecting the fluidity, and there is no way to ensure that it can be completely filled, and there is no way to ensure that the whole section of prestressed tendons can be well bonded with concrete; And cement plus water comparison.

When the slurry chain is completed, the grouting pump is turned on to discharge the slurry from the grouting pipe to remove air, water and slurry. When the flow shed of the discharged slurry is consistent with the fluidity in the mixing tank, the slurry pressing can be started.

Hole grouting formula Prestressed ververifying channel grout is a grouting material composed of high-quality cement and expansion agent, water reducer and other organic and inorganic materials. Products.

2.Hole pressure slurry.

It's not the same. The main difference is that the properties are different, the characteristics are different, and the applicability is different

First, the nature is different.

1. Slurry press.

It is a grout agent refined from high-performance plasticizer, surfactant, calcium silicate micro-expansion agent, hydration heat inhibitor, migratory rust inhibitor, nano-scale mineral silicon, aluminum, calcium iron powder, stabilizer, or refined compound with low-alkali and low-heat Portland cement.

2. Pressing slurry.

It is optimally formulated with a variety of high-quality cementitious materials and high-performance admixtures.

Second, the characteristics are different.

1. Slurry press.

It has the characteristics of micro-expansion, no shrinkage, large flow, self-compaction, extremely low water secretion rate, high filling, thin air bag foam layer, small diameter, high strength, rust prevention and rust resistance, low alkali and chlorine-free, and high adhesion.

2. Pressing slurry.

It has the characteristics of excellent fluidity, stable slurry, good filling, adjustable setting time, no shrinkage, micro-expansion, high strength, and no harmful substances to steel bars.

Third, the applicability is different.

1. Slurry press.

It is suitable for post-tensioned beam prestressed pipeline filling and grouting and anchoring grouting of ground anchor system, continuous wall head leakage prevention grouting and curtain grouting of the enclosure system; Equipment foundation grouting, backing plate grouting and beam-column joints, engineering repair and bolt anchoring, self-compacting without vibration, micro-expansion, anti-oil seepage, anti-corrosion and anti-corrosion, anti-freezing and anti-seepage; It is used for pore grouting of high-strength steel prestressed concrete components and reinforcement of roads and bridges.

2. Pressing slurry.

All kinds of railway and highway post-tensioned prestressed bridge channel grouting methods, large-scale prestressed structure channel grouting , various concrete structure joints at leakage grouting and curtain grouting , anchor grouting and void filling or repair, etc.