(1) Boron steel wire is considered to be suitable, has high strength, good corrosion resistance, and long service life. The wire mesh is considered suitable and uses a soft and tough structure of twisted hexagons, which does not loosen and collapse.
(2) There is no structural joint in the construction, which can be formed into an integral part with extensibility and flexible structure. It can be suitable for the collapse of larger slopes and has better safety and stability than rigid structures. Sex, the ground bearing capacity is not high, reducing the cost of ground disposal.
(3) Make a group of independent stone blocks, and can also be connected in series between the cage and the cage to form a larger group. Anti-scour has a strong experience and can bear the maximum flow rate of up to 6m.
(4) It has a unique water permeability, which can be used to discharge nutrients in the soil, which can be used to solve the unsmooth effects caused by pore water pressure.
(5) The hole between the blocks of stone can provide a good ecological background for the micro-living matter, fish and other water-lived substances in the river. A porous mass composed of stones can be supplied several times the surface of a single large stone or the surface of an object, and a living material film formed on the outer surface of the stone helps to improve water quality.
(5) After the pores between the stones are replenished by the soil, they help the growth of natural plants, green background, and try to take care of the ecology.
(6) Introduced the theory of ecological background, which can reduce the unsmooth impact of the composition of the cement and its additives on the atmosphere and water quality.
(7) Because of the utility of the wire, the diameter of the block stone can be varied, and the quality of the block stone is low. You can make full use of local stone resources to reduce project cost.
(8) The construction is simple and convenient. The cage body can be manufactured according to the preset intention. The factory produces and manufactures semi-products. When the construction is started, it will be assembled and shaped according to the preset plan. It will be paved into slope protection or masonry to form a retaining wall. The operation is simple and convenient. The climatology interference is small, and it is suitable for mechanized operation, which can guarantee the quality of the work and accelerate the progress of the project.
(9) It is more suitable for the winter and winter frost heaving deformation of earth embankments and bank slopes in the permafrost regions, which is not easy to be damaged. It can solve the problem of fire protection of frozen and dry season geogrids after water storage in northern winter.
Performance
Antifreeze concrete hardens at negative temperatures and achieves the desired properties under specified curing conditions and prevents freezing of moisture in the material at low temperatures. Ensure the normal construction of concrete under negative temperature and reduce the freezing point in concrete mix. It can be combined with water reducing agent and air entraining agent to prevent freezing, and the effect is better. It is used in various concrete projects and is used during construction in the cold season.
The concrete is normally hydrated in a negative temperature environment of 0 ° C to -15 ° C; the freezing point is lowered and the early strength of the concrete is increased.
2. Antifreeze classification
Antifreeze can be divided into strong electrolyte Inorganic Salts (chlorine salts, chlorine salts, rust-proof, chlorine-free salts), water-soluble organic compounds, organic compounds and inorganic salts, and composite antifreeze.
There are two types of freezing point reduction type and Surfactant type. Low-carbon alcohols, glycols, and amides are used to lower the freezing point. The surfactant type enables the material to form a hydrophobic absorption film on the surface, such as an acid phosphate amine salt, an alkylamine, a fatty acid amide, an organic acid ester, an alkyl succinimide, and the like. For example, in concrete for concrete in winter construction, the concrete can be hardened at a negative temperature and achieve sufficient antifreeze strength within a specified time.
Can be made into powder or liquid. It is used to prevent the freezing damage caused by the construction of concrete under negative temperature in winter. Ensure the normal construction of concrete under negative temperature. Its main components are sodium nitrite, carbonate, calcium chloride, calcium nitrite, urea, ethylene glycol and the like. They can reduce the freezing point in concrete mixes. It can also be combined with water reducing agent and air entraining agent to prevent freezing, and the effect is better.
3. Mechanism of action
The antifreeze component can change the liquid phase concentration of the concrete, lower the freezing point, and ensure that the concrete has a liquid phase at the negative temperature, so that the cement can continue to hydrate.
The water-reducing component can reduce the water consumption of the concrete mixing, thereby reducing the amount of ice formation in the concrete, and making the ice crystal grain fine and evenly dispersed, and reducing the damage stress on the concrete.
The bleed air component introduces a certain amount of tiny closed bubbles to slow down the frost heave stress.
The early strength component can improve the early strength of concrete and enhance the resistance of concrete to freezing.
The rust inhibitor such as nitrite can prevent the corrosion of the steel salt to the steel bar to a certain extent, and at the same time, it has the functions of antifreeze and early strength.
4. Product Features
1. This product is made up of components such as antifreeze, early strength, bleed air and water reduction.
2. This product does not contain chlorine salt and has no rust effect on steel bars. It can be widely used in winter construction of industrial and civil buildings, roads, bridges and water buildings.
3. This product is gray powder, easy to dissolve, non-toxic, easy to use.
5 . Instructions
1. Concrete raw materials should meet the requirements of the "Construction and Acceptance Specifications for Reinforced Concrete Projects". Cement: It is advisable to use ordinary Portland cement or slag Portland cement. The cement shall not be shipped for more than two months. Aggregate: The quality of sand and stone used should meet the requirements of winter construction in the national standard. The aggregates must not contain frozen materials such as ice and snow. The frozen sand blocks must be broken and used after screening.
2. When mixing, pay attention to reduce the mixing water properly. The water reduction rate can be controlled at about 10%, and the slump should be controlled within 30mm. When using, it must assist certain insulation measures, and the temperature of the concrete out of the tank should not be lower than 7 °C.
3. The temperature of the newly poured concrete is not lower than 5 °C. Immediately after molding, it is covered with plastic cloth and 1~2 layers of straw bags to strengthen the heat preservation and moisturization of the newly poured concrete. The curing time is not less than 7 days.
4. The dosage is 5% by weight of the cement.
6. Storage and packaging
1. This product is easily soluble in water, so pay attention to moisture and water during transportation and storage.
2. This product is packed in moisture-proof woven bag, the net weight of each bag is 50kg±0.5kg.
7. Common types
antifreeze agents include alcohols, alcohol ethers, chlorinated hydrocarbons, and inorganic salts. Commonly used antifreeze agents are methanol, ethanol, isopropanol, ethylene glycol, Propylene Glycol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, ethylene glycol butyl ether acetate, dichloromethane, 1, 1-two Ethyl chloride, 1,2-dichloroethane, dimethyl sulfoxide, formamide, calcium chloride, sodium acetate, magnesium chloride, and the like. Dimethyl sulfoxide can be used as an antifreeze for latex, and urea and thiourea also have an antifreeze effect on the emulsion.
Chloride salts, chlorine-free salts
Jinan Huijinchuan Chemical Industry Co., Ltd. , https://www.hjcchemical.com