Precautions for using dry mixed gypsum mortar equipment

1. Dry mixing Precautions for using gypsum mortar equipment

1. Before starting the dry-mixed gypsum mortar equipment, we must pay attention to: first open the observation port, discharge port, feed port, etc. of each equipment to observe whether there are any Residues and debris. If it is necessary to strictly clean it before starting work, it is strictly forbidden to put hands, hard objects and debris into the equipment during work.

2. To extend the life of the equipment's motor, the equipment power supply must be grounded when working. After turning on the equipment, the heat engine needs to be idling for 5-10 minutes. Production can only be carried out if no abnormality is found in the heat engine.

3. In order to ensure the safety of users during the production process, the control switches of each equipment must be treated to prevent leakage.

4. Non-professionals are strictly prohibited from testing, repairing, and debugging the equipment.

5. After starting the equipment, be sure to pay attention to whether the working direction of the equipment is consistent with the specified direction, otherwise it will cause damage to the equipment.

6. After the equipment is put into use, the equipment must be strictly maintained on a regular basis , to improve the efficiency of the equipment and extend the service life of the equipment.

7. When installing the equipment, you must choose a place that is easy to ventilate and dry, and keep the surrounding area clean and hygienic.

8. Regularly check the tightness of the transmission belt and the screws at the connecting parts, and make appropriate adjustments.

9. The entire set of equipment is a gap-type mixing equipment. Please note that the workload at a time cannot exceed the specified amount of the equipment.

10. The equipment strictly abides by empty start.

2. Performance of dry mixed gypsum mortar

1. Thickeners, water-retaining agents and stabilizers are ordinary mortars prepared from cement, inert or active mineral admixtures, and fine aggregates. The main The disadvantages are poor cohesion, poor stability, easy to bleed, segregate, and settle, and difficult to construct. After construction, the bonding strength is low, easy to crack, weak waterproofing, and poor durability.

Appropriate additives must be used for modification. In terms of improving the cohesion, water retention and stability of the mortar, the additives that can be selected include cellulose ether, modified starch ether, polyvinyl alcohol, and polypropylene. Amides and thickened powders, etc.

2. The main function of redispersible latex powder thickener is to improve the water retention and stability of mortar. Although it can prevent mortar cracking to a certain extent (slow down the water evaporation rate), it is generally not used to improve the toughness of mortar. , crack resistance and waterproof means.

3. The addition of cellulose, starch ether and polymer materials as defoamer undoubtedly increases the air-entraining properties of the mortar. This affects the compressive strength, flexural strength and bonding strength of the mortar, reducing the its elastic modulus. On the other hand, it also has a great impact on the appearance of gypsum mortar, and it is very necessary to eliminate air bubbles introduced into the mortar.

At present, imported dry powder defoaming agents are mainly used in China to solve this problem. However, it must be noted that due to the high viscosity of commercial mortar, it is not very easy to eliminate bubbles.

4. When the anti-sag agent is applied to ceramic tiles, foamed polystyrene boards, and rubber powder polystyrene particle insulation mortar is applied, the biggest problem is sagging. Practice has proved that adding materials such as starch ether, sodium bentonite, metakaolin and montmorillonite can solve the problem of sinking of gypsum mortar after construction.-webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal; text-decoration-style: initial; text-decoration-color: initial">1. Thickener, The water-retaining agent and stabilizer are ordinary mortars prepared from cement, inert or active mineral admixtures, and fine aggregates. Its main disadvantages are poor cohesion, poor stability, easy bleeding, segregation, and settlement, and difficult construction. Later, the bonding strength is low, easy to crack, weak waterproof, poor durability, etc.

Appropriate additives must be used for modification. In terms of improving the cohesion, water retention and stability of the mortar, you can choose Additives include cellulose ether, modified starch ether, polyvinyl alcohol, polyacrylamide and thickening powder.

2. The main function of the redispersible latex powder thickener is to improve the water retention and stability of the mortar. Although it can prevent mortar cracking to a certain extent (slowing down the evaporation rate of water), it is generally not used as a means to improve the toughness, cracking resistance and waterproofness of mortar.

Solving the problem of sinking is mainly to increase the initial shear stress of gypsum mortar, that is, to increase its thixotropy. In practical applications, it is not easy to choose a good anti-sag agent because it requires solving the relationship between thixotropy, workability, viscosity and water requirement.

Effective measures.