Prevent lightning strikes and ensure production and safety

With the increase of bad weather, the weather such as thunderstorms and mudslides has become more and more frequent in recent years. It has seriously affected people's production and life, such as lightning disasters. As one of the top ten natural disasters in the world. It is highly destructive and has a wide range of scope. Once the protective measures are not in place, its destructive power will be devastating. Among them, accident cases caused by lightning are not uncommon.

On the afternoon of May 3, 2005, the thunderstorms and winds in Shaoguan, the railway power grid was severely struck, causing the entire power grid of the southern section of the Beijing-Guangzhou Railway to be cut off, interrupted for 100 minutes, resulting in at least more than ten trains on the railway, seriously affecting The normal operation of the railway did not return to normal until 8 pm.

At 1700 hours on June 2, 2007, an office in the Shenyang Military Region was struck by lightning, destroying one computer and one telephone. The lightning disaster caused direct economic losses of 0.8 million yuan. The reason for lightning strikes is that the power supply and signal system lightning protection devices are not perfect.


There are many cases of lightning strikes like the above, and the reasons are many:

First, the sophisticated electronic products are widely used <br> <br> Now with advances in technology, all kinds of sophisticated high-performance electronic devices are widely used, production and living convenience at the same time, due to the integration of electronic devices The electromagnetic induction generated by lightning is quite sensitive, thus exacerbating the occurrence of lightning accidents.

Second, the lack of mine awareness <br> <br> even lightning accidents occurred frequently, or not caused widespread concern in some people or departments or to take the necessary protective measures, once the damage, then to react it was too It is too late, the improvement of lightning awareness is the first step of lightning protection. If there is no awareness of lightning protection, what measures are there?

Third, to strengthen protective measures <br> <br> reason why lightning accident occurred, the main reason is not mine to take appropriate measures for lightning protection measures, not limited to protective measures installed lightning rod, lightning protection zone, etc., for electronic The protection of the equipment needs to be installed with a lightning protection device. The lightning protection device is divided into a power lightning protection device and a signal lightning protection device.


The power supply lightning arrester has primary, secondary, tertiary and DC power supply lightning protection devices. It can classify the power supply lines and install different levels of lightning protection devices in the corresponding areas to protect the power supply system. The lightning device has a network signal lightning protection device, a digital signal lightning protection device, an analog signal lightning protection device, etc., and can be installed and protected according to equipment characteristics and signal types. Through the protection of the above lightning protection device, to prevent damage to the equipment caused by the induced lightning.

Fourth, strengthen the line and mine facilities and inspection <br> <br> before the thunderstorm season, they respond to inspect power lines and signal lines in the region, if damage occurs to timely repair to prevent its increase against lightning The destructive power that led to the occurrence of a fire incident. For areas where lightning protection devices have been installed, check them regularly to avoid failure or damage of the lightning arresters and to prevent lightning protection.


Lightning has a strong destructive power and impact, and the consequences of a lightning strike will be irreparable. In order to reduce the frequency of lightning accidents and ensure the safety of people's lives and property, the awareness of lightning protection must be improved. Regardless of the power, security, industry and other fields, we should improve the lightning protection measures to prevent the occurrence of lightning accidents. Ensure the smooth and stable operation of production and life in all fields.

Cement-based non-shrinking self-leveling Grouting Material
KS series of grout is a high-tech one-component grouting material using Portland cement, pre-grade filler and additives that control the expansion in the plastic and can reduce water consumption.
Application of grouting Material:
Widely used in free-flowing precision grouting construction, including heavy machinery floor support, crane tracks and pillars foundation, but also can be used as mast, anchor bolt of the excellent reinforcement of grouting material; also is a good material for concrete repair works; design Beneath bridge supports, posts and flanged lamp posts, heavy pillar bases, and machine bases with dynamic loads. Such as thermal power plants, large paper mills, steel plant, steel mills, large machinery and equipment plants, cement plants.
Product advantages:
1, compensation shrinkage ---- gas expansion system, to compensate for shrinkage and settlement in the plastic slurry, to ensure that the grout material and the foundation in close contact
2, no chloride ---- The formula does not use chloride, thus avoiding the chloride hazards
3, high early strength ---- make the factory equipment faster to install and early use
4, non-ferrous ---- will not be rusty and stains or cracks due to rust expansion
5, reliability ---- factory pre-packaging materials, to eliminate the site produced by the error mixing


According to the standard:

KS series grouting material is based on the following part of the relevant standard test:
ASTMC-1107-97(Type)CRD-C621-82A
YB/T9261-1998       MS 522:part2:1989
ASTM C940-87        BS 4551:1980
JC/T986-2005

Expansion performance:

According to the American Standard ASTMC827 plasticizing stage test expansion rate of 0.5% or more, the long-term expansion of the curing stage to meet the requirements of the relevant standards.

Material properties:

project

model

KS-40

KS-60

KS-801

40

401

60

601

(mpa)

compression strength(mpa)

1 day

20

22

25

30

45

28 day

40

50

60

70

85

(mpa)

Flexural strength(mpa)

28 day

9

10

12

12

12


Setting time


Initial setting

6.5h

6.5h

6h

6h

6h


Final condensate

 

8h

8h

7.5h

7.5h

7.5h


Expansion time



Plastic stage


Start 10min to initial setting


Start 10min to initial setting


Start 15min to initial setting


Start 15min to initial setting


Start 15min to initial setting



Curing stage


The final setting to cure more than 28 days


The final setting to cure more than 28 days

 

The final setting to cure more than 28 days             


The final setting to cure more than 28 days


The final setting to cure more than 28 days


Liquid density

(kg/m³)

2150

2150

2200

2200

2250


Water consumption

Ks/dag

3.8~4.0

3.8~4.0

3.8~4.0

3.8~4.0

3.6~3.8

Construction Instructions:


 1. floor grouting:

The flow distance should be determined based on the slit width and the liquid flow indenter to ensure that the grout flows from the gap to the front exit and the gap must not exceed 200 mm. If you guarantee a pressure head of 250mm, the maximum flow distance of up to 3 meters.

Note: The base surface must be constructed with oil-free and non-adherent loose material. If the surface of the concrete defects or slurry is cut intact before construction, the screw holes or solidified hole dust or sand blown net.

2. Floor:

Clean, no oil and other impurities must be removed to provide relief holes to ensure that all isolated areas are ventilated.

Pre-soaked: A few hours before grouting, the cleaned foundation must be submerged in water. Remove water from the free water and the hole just before pouring.

3.  Stir:

To achieve the desired consistency, the amount of water must be accurate, the selected amount of water after slowly pouring it into the mixing vessel, while stirring feed, add complete package and continue stirring for 3-4 minutes until evenly dispersed, no knot Block phenomenon so far.

4.  Grout:

The well-mixed material is poured over a period of 10 minutes to fully benefit from the expansion process. Each single perfusion thickness up to 200mm, the minimum width of the seam is 10mm.

5. Specific construction of large volume grouting:


Such as the thickness of more than 200mm. Aggregate grading (stones up to 10 mm in diameter) shall be added to the slurry to reduce the heat of hydration. The amount of aggregate used shall not exceed 1 part by weight of 1 part of KS series grout.

6.Low temperature construction:
When the temperature drops below 2 ° C, warm water (30-40 ° C) may be used to accelerate the strength increase and the cementitious material should be handled in winter.
High-temperature construction:
When the temperature exceeds 35 ℃, grouting material should be stored in a cool place, and cold water mixing.
Conservation:After grouting is complete, all exposed parts should be cured with Cask Cares or wet sacks.
Countermeasure :
KS series grout contains cement powder, which when mixed with gypsum or when wet, releases alkali that is harmful to the skin. Avoid inhaling dust and avoid touching the skin or eyes.
Estimation:pack
KS series grouting material) 25KG/bag
Under free flow the volume is about 13.0L
CONSTRUCTION schematic:

grouting material


KS series grouting material

grouting material

grouting material CONSTRUCTION schematic:

Storage:
KS series grouting material intact material in dry place storage period of 12 months, if stored in high temperature and high temperature storage area will be shortened.
Kasler Building Materials Co., Ltd. guarantees the quality of its products manufactured and sold, and sells it according to the agreed sales terms. Casper pledges to make every effort to advise clients on the construction of the project, recommending the use of solutions and materials. However, as we are unable to exercise direct and continuous control over the use of our products for sale, CASLUS BUILD MATERIALS CO., LTD can not afford to use whatever advice our customers ultimately end up using and recommending solutions and materials The use of the product caused by a variety of direct or indirect responsibility.


Grouting Material

Grouting Material,Cement Grouting Material,High Strength Grouting Material,Non-Shrinkage Grouting Material

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