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Shanghai CGM series grouting materials
CGM grouting material series products (hereinafter referred to as CGM grouting material) are dry mixed mortar processed by a certain process with high-strength materials as aggregates, cement as binder, supplemented by substances such as high flow state, micro expansion and anti segregation
When used on site, the construction can be carried out by adding the specified amount of water and mixing it evenly, which is simple and fast

CGM grouting material is a new cement-based grouting material independently developed by the General Institute of Construction Research of MCC in 1991, and has won a number of national and ministerial scientific and technological progress awards and new product certificates
Beijing newison Construction Engineering Technology Co
, Ltd
is the compilation unit of the first grouting material industry standard "technical specification for construction of cement-based grouting materials" (yb/t9261-98) and the national standard "technical code for application of cement-based grouting materials" (gb/t50448-2008)
http://www
cgmgqgjl
com/ At present, our CGM grouting material products have been sold to all provinces, cities and autonomous regions across the country, and are widely used in major engineering projects of equipment installation, structural reinforcement and building maintenance in metallurgy, petrochemical, electric power, coal, machinery, construction, light industry, marine engineering, road and bridge, environmental protection, municipal and other fields
Its high-quality quality and good service have been highly praised by customers
I
product features:
1
The double effect of plastic expansion and hardening expansion ensures the effective bearing surface (EBA) More than 90%, uniformly transmit the load

2
With large fluidity, no bleeding and segregation, the construction is simpler and faster to ensure the construction quality

3
Ensure the normal operation of the equipment after 24 hours of early strength and high-strength grouting

4
It does not contain metal expansion source, does not corrode reinforcement, and has good oil seepage resistance and durability

2、 Product application guide
1
Secondary grouting of equipment foundation and steel structure column base plate
Thickness of grouting layer b（mm） Selected products
5～20 CGM® 380 Series products
20～80 CGM® 340 Series products
50～200 CGM® 300 Series products
≥ 150 CGM® 270 Series products

2
Anchor bolt anchor grouting column cup mouth grouting
Thickness of grouting layer b（mm） Selected products
15～80 CGM® 340 、 CGM® 300 Series products
≥ 50 CGM® 270 Series products
3
Concrete structure reinforcement grouting: ① cgm270 series products are selected for reinforcement by increasing the section method and cup mouth grouting of steel structure column (concrete column); ② Cgm380 and cgm340 series products (according to the spacing between steel plate and column wall) are selected for steel plate sleeve reinforcement

4
The duct grouting of post tensioned prestressed concrete structure adopts CGM®- 380 (fully compensate for shrinkage and prevent the formation of “ crescent effect ” in the duct after grouting)

5
Winter construction grouting
The construction ambient temperature is - 15— 5 ℃ When, http://www
cgmgqgjl
com/ Cgm-340c, cgm-300d, cgm-270c Negative temperature early strength type special grouting material for winter construction

6
The grouting part of the equipment is in a high temperature environment for a long time, and the radiation temperature Cgm-300e heat-resistant grouting material can be used below 500 ℃

3、 Construction method
1
Mixing equipment, maintenance items and necessary tools shall be prepared before construction

2
Mixing of CGM grouting materials
(1) When mixing CGM grouting materials, the amount of water added should be added according to the amount of water on the product certificate provided with the goods, and it can be used after mixing evenly
The water consumption shall be reduced as far as possible under the condition of meeting the construction mobility
It is strictly prohibited to use mixing materials with obvious water seepage for grouting

(2) CGM grouting materials can be mixed by mechanical mixing or manual mixing
Forced mechanical mixing is recommended

(3) The amount of each mixing should depend on the amount used to ensure 40 Use up the mixed grouting materials within minutes

(4) During winter construction, no more than Mix the grouting material with hot water at 60 ℃, and the molding temperature of the slurry is Above 10 ℃

(5) It is strictly forbidden to use CGM Any admixtures and admixtures shall be added into the grouting materials

3
Anchor bolt anchoring
(1) When the anchor bolt is drilled, the foundation concrete strength shall not be less than 20MPa, the horizontal deviation of bolt hole shall not be greater than 5mm, the verticality deviation shall not be greater than 5°， The bolt hole wall should be rough

(2) After the hole is formed, the sundries in the hole shall be removed, the depth of the hole shall be detected, and the hole wall shall be fully wetted with water
The accumulated water in the hole shall be removed before grouting

(3) Pour the mixed CGM grouting material into the bolt hole
It is strictly prohibited to vibrate during the grouting process, and it can be slightly inserted if necessary
Bolts shall not be adjusted after grouting

(4) When the grouting construction is not easy to be poured directly, the launder should be used for auxiliary construction

4
Secondary grouting of equipment foundation
(1) The surface of equipment foundation shall be roughened
Clean the foundation surface of the equipment, and there shall be no debris such as gravel, laitance, floating ash, oil stain and release agent
Before grouting 24 The surface of equipment foundation shall be fully wetted after hours
Before grouting 1 Hours, clear the accumulated water

(2) Erect the formwork according to the grouting construction drawing
The joints between the formwork and the foundation, and between the formwork and the formwork shall be sealed with cement slurry, adhesive tape, etc
, so that the overall formwork is watertight
The horizontal distance between the formwork and the equipment base should be controlled within 100mm about
The top elevation of the formwork shall be higher than the upper surface of the equipment base 50mm。
(3) The grouting of long equipment or track foundation shall be carried out in sections
That is, the jump warehouse method shall be used for construction, and the length of each section shall not exceed 5m, large equipment grouting must use pressure grouting equipment to ensure continuous grouting

(4) Grouting shall be carried out at multiple points on one side or adjacent sides until it overflows from the other side, so as to facilitate the exhaust during the grouting process
Grouting shall not be carried out simultaneously from four sides

(5) After grouting starts, it must be carried out continuously without interruption
And shorten the grouting time as much as possible

(6) Vibration is strictly prohibited during grouting
If necessary, the grouting booster can be used to push along the bottom of the grouting layer CGM grouting material shall not be pushed from the middle and upper part of the grouting layer to ensure the uniformity of the grouting layer

(7) After the grouting of equipment foundation is completed, it shall be carried out after grouting 3~6 Cut an oblique angle of 45 ℃ outward along the edge of the equipment (see the figure below) to prevent cracks at the free end
If it is impossible to cut the edge, it should be done after grouting 3~6 Press the surface of the grouting layer with a spatula for hours
(the small cracks in this part have no adverse effect on the operation stability of the equipment)

5
Concrete structure reinforcement
（1） Mix the mixed CGM grouting material is poured into the erected formwork;
（2） During the grouting process, the formwork can be properly knocked or vibrated as required;
（3） The formwork removal time shall comply with the provisions of the following table of this construction method

Daily minimum temperature (℃ ) Formwork removal time (H) Curing time (d)
－ 10～0 96 fourteen
0～5 72 ten
5～15 48 seven
≥ 15 24 seven
4、 Construction maintenance
1
Natural curing
(1) After grouting, the exposed part shall be sprayed with water for curing or covered with plastic film in time, and covered with wet straw bags to keep wet

(2) Watering and curing time shall not be less than 7 Days, the watering times should keep the grouting material in a wet state
When fast setting and fast hardening type is adopted When using CGM grouting material, the curing shall be carried out according to the method required by the product

2
Winter curing
(1) During winter construction, if the grouting project has no special requirements for strength growth, the exposed part shall be covered with plastic film and thermal insulation materials in time after grouting
The initial curing temperature should not be lower than 5℃。 Do not water when curing under negative temperature conditions;
(2) The difference between the surface temperature of grouting material and the ambient temperature after formwork removal is greater than At 20 ℃, it shall be covered and cured with thermal insulation materials;
(3) If the ambient temperature is lower than the minimum construction temperature required by the product or the strength growth needs to be accelerated, manual heating and curing can be adopted; The maintenance measures shall comply with the relevant provisions of the current code for winter construction of Building Engineering (jgj104)

3
After the CGM grouting material reaches the formwork removal time, the equipment can be installed
The specific time is shown in the table below

Daily minimum temperature (℃ ) Formwork removal time (H) Curing time (d)
－ 10～0 96 fourteen
0～5 72 ten
5～15 48 seven
≥ 15 24 seven
4
After the grouting of the equipment foundation, if there is any part to be removed, it can be removed after the grouting is completed 3— After 6 hours, that is, before the grouting layer hardens, gently remove it with a spatula or shovel

5
The vibration of the running machine shall not be transmitted to the equipment foundation, and the machine shall be shut down after the secondary grouting for 24— 36 hours to avoid damaging the UN hardened grouting layer

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