Special building materials should be considered from two angles:
First of all, from an intuitive point of view:
The product is not popular; Specific local, regional or industrial needs;
Secondly, understand "it" from an indirect perspective:
It is a thorough improvement and substitution of traditional products from a certain aspect, making the products look more innovative and creative; Make the performance and value of products get greater promotion and sublimation! So' it' also has its initiative and uniqueness! !
Third, unconventional ordinary building materials are substitutes for special fields or conventional materials!
I hope I can help you and adopt it.
Defeng Hiroyuki
What are special building materials?
Special building materials should be considered from two angles:
First of all, from an intuitive point of view:
The product is not popular; Specific local, regional or industrial needs;
Secondly, understand "it" from an indirect perspective:
It is a thorough improvement and substitution of traditional products from a certain aspect, making the products look more innovative and creative; Make the performance and value of products get greater promotion and sublimation! So' it' also has its initiative and uniqueness! !
Third, unconventional ordinary building materials are substitutes for special fields or conventional materials!
Fourth, for example, glass fiber reinforced plastic products, which are not steel, adopt special technology to make products have most of the properties of steel, in many fields. His performance far exceeds that of steel!
What's the telephone number of Wuhan Sanyuan Special Building Materials Co., Ltd.?
Wuhan sanyuan special building materials co., ltd. contact information: company telephone number 027-8666062 1, company email address 657639 10@qq.com. The company has nine contact information in Aiqi, including three telephone numbers.
Company introduction:
Wuhan Sanyuan Special Building Materials Co., Ltd. was established in Qingshan District, Wuhan City, Hubei Province on May 22, 20001year, and its registered address is located in Worker Village Urban Industrial Park, Qingshan District, Wuhan City.
Yuan Lidong, the legal representative of Wuhan Sanyuan Special Building Materials Co., Ltd., with a registered capital of 1 million yuan, is currently in business.
See more business information and materials of Wuhan Sanyuan Special Building Materials Co., Ltd. through the investigation of caring enterprises.
Classification of special building materials
Polyaluminum chloride (PAC) is an inorganic polymer coagulant, which is an inorganic polymer water treatment agent with large molecular weight and high charge due to the bridging effect of hydroxyl ions and the polymerization of multivalent anions. The molecular formula is as follows: [AL2nCL6-n] alkalinity: B=n/6× 100%, and its coagulation performance is as follows:
A, strong electric neutralization of colloidal substances in water.
B, excellent bridge adsorption of hydrolysate to suspended solids in water.
C, selective adsorption of soluble substances.
The main form of polyaluminum chloride in water is AL 13O4247+ calcium aluminate powder is gray powder. The main component is a mixture of calcium aluminate and calcium monoaluminate. Slightly soluble in water, the aqueous solution is alkaline, and the PH value is about 1 1.
The reaction between calcium aluminate powder and inorganic strong acid is very active and can start at room temperature. The dissolution rate of alumina can reach above 90%. Using it as raw material to produce liquid or solid polyaluminum chloride can simplify the process, reduce the cost and improve the product quality. It is the raw material used by most polyaluminum chloride production enterprises at home and abroad.
Scope of application:
Calcium aluminate powder is mainly used to produce aluminum salts such as polyaluminum chloride, aluminum sulfate and sodium aluminate. It can also be used to adjust the alkalinity and refractories. Aluminate cement is a kind of hydraulic cementing material, which takes bauxite and limestone as raw materials, produces clinker with calcium aluminate as the main component and alumina content of about 50% by calcination, and then grinds it. Aluminate cement is often yellow or brown, and some are gray. The main minerals of aluminate cement become monocalcium aluminate and other aluminates, and a small amount of dicalcium silicate.
According to national standards, the density and bulk density of aluminate cement are similar to those of ordinary portland cement. Its fineness is specific surface area ≥300m2/kg or 45μm sieve residue ≤20%. Aluminate cement is divided into four types: CA-50, CA-60, CA-70 and CA-80. The setting time and strength of each cement shall not be lower than the standard.
Aluminate cement has a rapid solidification and hardening speed. The strength of 1d can reach more than 80% of the highest strength, and it is mainly used in emergency projects, such as national defense, roads and special emergency repair projects.
Aluminate slurry has high hydration heat and concentrated heat release. The hydration heat released in 1d accounts for 70% ~ 80% of the total, which makes the internal temperature of concrete rise relatively high. Even if it is constructed at-10℃, aluminate cement can quickly set and harden, which can be used in winter construction projects.
Under ordinary hardening conditions, aluminate cement has strong sulfate corrosion resistance, because cement stone does not contain tricalcium aluminate and calcium hydroxide and has high density.
Aluminate cement has high heat resistance. If fire-resistant coarse and fine aggregates are used, heat-resistant concrete with service temperature of 1300 ~ 1400℃ can be prepared.
However, the long-term strength and other properties of aluminate cement tend to decline, and the long-term strength decreases by about 40% ~ 50%. Therefore, aluminate cement is not suitable for long-term load-bearing structures and projects in high temperature and high humidity environment. It is only applicable to emergency military engineering, emergency repair engineering, temporary engineering and preparation of heat-resistant concrete.
In addition, when aluminate cement is mixed with portland cement or lime, it not only causes flash coagulation, but also cracks or even destroys concrete due to the formation of high alkaline calcium aluminate hydrate. Therefore, it should not be mixed with lime or portland cement during construction, nor should it be used in contact with unhardened portland cement. Fast plugging agent is a kind of hydraulic material with fast setting and hardening, high hourly strength and slight expansion. This raw material is nontoxic and tasteless. After strict screening, it has excellent performance and simple operation. It can be used after mixing with water, and can be used on wet surfaces or for plugging with water. The effect is peculiar. This raw material can be widely used for plugging, stopping water, repairing, pouring and construction and maintenance of leakage projects. In buildings, underground, underwater and quicksand tunnels.
How to use:
1, first of all, chisel the leaking point or seam into a vertical or gargle, and clean up the sundries;
2. Put the quick plugging agent into a stirring tank, add a certain proportion of water, and quickly stir it into a muddy paste. When the temperature is lower than 5 degrees Celsius in winter, stir with water at 40 degrees Celsius;
3. Apply the mixed plugging agent to your hands. When you feel that the application is slightly hot, quickly press it down in the direction of water leakage for a certain period of time before releasing it. Generally, water may be blocked within 10 minutes;
4. After water plugging, plaster with polymer waterproof mortar and keep the surface for three days.
5. For the seepage pit, you can directly put the dry powder of quick plugging agent into the into the pit, then step on it with your feet, and then loosen your feet after hardening;
6. For cracks with serious water leakage, first drill drainage holes in the places with serious water leakage to slow down the leakage in other places, and finally block the drainage holes, and then plaster them with polymer waterproof mortar.
It is mainly composed of hard and high-strength cement clinker, chemical admixture, binder, various auxiliary materials and powdery substances.
Performance characteristics:
1, model: F, S.
2. The initial setting time of type F is not later than 3 seconds, and the final setting time is not later than 5 seconds; 15 second compressive strength is greater than 10MPa, 1 hour is greater than15 MPa;
3. The initial setting time of type S shall not be later than 10 second, and the final setting time shall not be later than 20 seconds; 1 hour compressive strength is greater than 10MPa, greater than 35MPa for 24 hours and greater than 65MPa； for 28 days;
4. The permeability index is higher than P 12, and it can resist the erosion of environmental water with the concentration of SO42- higher than10000 mg/L/L. It is non-toxic and tasteless, and can be used in drinking water engineering.
5. It has the functions of quick setting, hard lump, early strength, high strength and no shrinkage, and is more cohesive than plugging, waterproof and crack prevention.
It is suitable for quick interception of running water in various concrete projects. Calcium sulphoaluminate concrete expansive agent without sodium salt will not cause alkali-aggregate reaction of concrete. However, it has good durability, stable expansion performance and continuously rising strength. Ordinary concrete often leaks due to shrinkage and cracking, which reduces its use function and durability. Adding 1.5%-2% expansion agent into cement can prepare shrinkage compensating concrete, which greatly improves the crack resistance and waterproof ability of concrete structure. The external waterproof operation can be cancelled, the spacing of post-pouring zone can be extended, and the temperature difference crack between mass concrete and high-strength concrete can be prevented. Scope of application: used in crack-resistant and impervious concrete and high-performance concrete, waterproof can be cancelled, expansion and contraction spacing can be expanded, or seamless construction can be realized. For reinforced concrete supernormal structures, expansion joints should be set to prevent concrete from cracking due to drying shrinkage and temperature difference. According to the relevant specifications of cast-in-place reinforced concrete structure, the expansion joint shall not exceed 30m indoors and 20m outdoors, and it takes 4-6 days to fill the joint. Due to the complex construction and long construction period, the construction unit hopes to extend or cancel the post-pouring zone, and adding expansion agent can extend the distance of expansion joints. It is advisable to control the expansion joint spacing within 80 meters.