CGM-340a bearing mortar grouting material

The product has the following characteristics
Bearing mortar
Has expansion function that meets technical requirements
Ensures firm bonding between the slurry and the grouting part
, making the load function effective Transferred to the foundation
Bearing mortar
High flow performance
Has great fluidity
,
Can flow to various parts requiring grouting without adding external force
Bearing mortar
Good workability
Not only flows well but also maintains for a long time
,
Has good cohesion
,
No delamination
,
No bleeding
Bearing mortar
High strength
Sky compressive strength
,
High strength in the later stage And no shrinkage
Bearing mortar
Low negative temperature construction
At low temperature
,
The strength still increases significantly under negative temperature
,
Effectively solves problems such as winter construction
Bearing mortar
Good durability
Ten thousand fatigue tests
,
Freeze-thaw cycle tests
,
No significant change in strength
Impermeability
,
Freeze resistance
,
Good performance in corrosion resistance
Bearing mortar
Does not contain chlorides
,
Has no corrosive effect on equipment
,
Steel bars
Bearing mortar
Easy to use
The finished product is dry mixed mortar
,
It can be used after adding water according to the construction site regulations
The bearing mortar is divided into three types according to the purpose
1.
Type
(
Special grouting material for prefabricated simply supported box beam basin rubber bearings for passenger dedicated lines
)
, main technical indicators
Serial number

Inspection items< br/>
Unit

Quality index

Inspection results



Fluidity










Fluidity









Bleeding rate









Compressive strength












Not lower than the test result




Not lower than the test results





Flexural strength


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Modulus of elasticity










Vertical expansion rate








, How to use
(
) Base surface treatment
Chiseling the surface of the supporting pad at the installation location of the bearing
,
Clear the debris in the reserved holes
,
Install the template for grouting
,
Reliable measures should be taken between the template and the top surface of the padding stone
,
Prevent grout leakage during gravity grouting
The base surface to be grouted should be cleaned of dust
,
Oil, other dirt and other substances that are not conducive to bonding
,< br/>The base surface should be moistened with clean water until it is saturated
,
But no open water should be left during construction
(
) Hoisting of prefabricated box beams
(
With supports

Place the box beam on the temporary support jack
,
Adjust the beam fulcrum elevation through the jack
(
) The beam is in place Finally
,
a gap
should be reserved between the bottom plate of the bearing and the supporting pad of the pier
for gravity grouting
br/>Bridge support mortar
(
) Gravity grouting is used to fill the gaps at the bottom of the support and the anchor holes
The grouting process should be from the center of the support to the surrounding areas
,
Until it is observed that the grouting material is completely filled from the peripheral gap between the formwork and the support bottom plate
The required grout volume should be initially measured before grouting
,
The actual grouting grout The quantity should not cause too much error with the calculated value
,
Prevent lack of slurry in the middle
(
) The slurry should be based on the weight ratio of powder to water
br/>)
Preparation
Should first add water into the mixing barrel
,
and then gradually add the weighed grouting material
,
while adding the material Stir with an electric mixing gun
,
until all the powder is added
,
Continue stirring for
minutes
,
to make the paste slurry The material is uniform
(
) After the grouting material reaches the specified strength
,
Remove the formwork
,
Check whether there is grout leakage
,
Fill the grout leakage
(
) Tighten the anchor bolts of the lower bearing plate
,
Remove the connecting angle steel of the upper and lower bearings
,< br/>Remove the temporary jack
,
Install the support steel hoarding
(
) Material consumption
∕
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