Plastering Dry Powder Mortar Types and Basic Formulas
1. Product classification
① According to the function of plastering mortar, it can be divided into:
Generally, the plastering mortar can be divided into ordinary plastering mortar, decorative plastering mortar, waterproof plastering mortar and plastering mortar with some special functions (such as heat insulation, acid resistance, and radiation proof mortar).
② Classification according to the cementitious material used in the plastering mortar
A． Plastering mortars with inorganic binders (cement, gypsum or slaked lime).
B． Decorative stucco mortars using cement, redispersible powder or slaked lime as binding.
C． Cement-based plasters are used for exterior applications and wet rooms, while gypsum-based plasters are used exclusively for interior walls.
2. Reference formula
For the plastering mortar for the interior and exterior walls of non-special functional brick walls, it is generally more common to choose a compressive strength of 10MPa or 15MPa, but low-strength and high-strength products can also be made according to specific special requirements.
The formula suggestion is to add 1%~4% RE5010N to the cement or lime-cement based finish plaster, which can improve its adhesion, wear resistance and flexibility. In addition, it is also recommended to add 0.2%~0.4% of cellulose ether, starch ether or a mixture of both. It is especially recommended to use redispersible polymer powder RI551Z and RI554Z with hydrophobicity to improve the performance of plastering and plastering.
Mortar Additive Masterbatch Introduction
The mortar additive masterbatch contains the following components: sodium fatty alcohol polyethylene sulfonate, cellulose, sodium sulfate, starch ether, etc.
Main functions: air-entraining, thickening, plastic-retaining, performance-enhancing and other unique effects, the only product in the country that does not mix according to the cement mass ratio. Saving cement in the mixed mortar can not only ensure the strength but also improve the durability, impermeability and crack resistance.
Features and Performance Features and Performance Features and Performance Features and Performance:
1. Improve mortar workability and labor efficiency
During masonry and plastering, the mortar is bulky, soft, and has strong cohesive force. The sticky surface is not sticky to the shovel, reducing ground ash and cost, and the mortar has a high degree of fullness. It has low requirements on the degree of wetness of the wall, and the shrinkage of the mortar is small, which overcomes common problems such as cracks, hollows, shedding, and foaming on the wall, and solves the problem of mortar workability. The mortar is stored for 6-8 hours without sedimentation, good water retention, no segregation of the mortar in the ash tank, and no need for repeated stirring, which speeds up the construction speed and improves labor efficiency.
2. Early strength effect
The mortar mixed with mortar additives has the affinity and strengthening effect with cement. Through the plasticizing process, it reaches a certain strength after 5-6 hours of use, and the later strength is better.
3. Water saving
The mortar prepared with mortar additives has a separation effect on water, which can reduce water consumption, reduce shrinkage of plastered walls and improve strength.
4. Additional functions
The mortar prepared with mortar additives has the functions of water retention, noise reduction, heat preservation, heat insulation, and frost resistance.
Formulation and production process of polyvinyl acetate emulsion adhesive
1. Formula
Vinyl acetate: 710 kg
Water: 636 kg
Vinyl alcohol polyvinyl alcohol (PVA): 62.5 kg
Ammonium persulfate (diluted with 10 times water): 1.43 kg
Octylphenol ethoxylate: 8 kg
Sodium bicarbonate (diluted with 10 times water): 2.2 kg
Dibutyl phthalate: 80 kg
2. Production process
Add polyvinyl alcohol and water into the dissolution kettle, stir for 10 minutes and heat up to 90°C, dissolve for 4 hours, and dissolve into a 10% solution. After filtering the dissolved PVA aqueous solution, put it into the polymerization tank, add 100 kg of octylphenol polyoxyethylene ether and primer monomer (about 1/7 of the total monomer amount), and persulfuric acid with a concentration of 10% 5.5 kg of ammonium solution, close the feeding hole, and open the cooling water. Start to heat up, and it will rise to about 65°C within 30 minutes. When liquid droplets appear in the sight glass, close the steam valve (about 30-40 minutes), and the temperature will rise to 75-78°C. body (complete addition within 8-9 hours). At the same time, add 50 grams of ammonium persulfate per hour (diluted with 10 times of water). The reaction temperature is too high or low, and the flow rate of the added monomer and the amount of the initiator can be properly controlled, but the total amount of the formula must not be exceeded. Record the reflux situation and reaction temperature of monomer addition every 30 minutes, and record the flow rate of monomer addition and the amount of initiator every hour.
After adding the monomer, observe the temperature of the reaction solution. If it is too high (above 85°C), 440 grams of ammonium persulfate can be added appropriately. 95°C, keep warm for 30 minutes, cool to below 50°C, add sodium bicarbonate solution. After observing that the appearance of the emulsion is qualified, add dibutyl phthalate, stir for 1 hour, and discharge.
Insulation Mortar Formula
1. Insulation slurry formula
A low-cost, fiber-free, absolutely easy-to-use insulation mortar formula.
1) Cement: 650kg
2) Secondary fly ash: 332kg
3) Modified seaweed ES7718S: 14kg
4) Modified seaweed ES7728: 2kg
5) hpmc: 2kg
7 cubic polystyrene particles can be made per ton of thermal insulation slurry.
This formula has good workability, high viscosity, and almost no leftovers in the powder wall. The thermal insulation slurry has a good wrapping degree to the particles and has good crack resistance.
2. Insulation production formula: anti-crack mortar (granular and inorganic system)
1) Cement: 220kg, 42.5 ordinary Portland cement
2) Fly ash: 50kg, secondary or undisturbed ash
3) Sand 40-70 mesh: 520kg, graded dry sand
4) Sand 70-140 mesh: 200kg, graded dry sand
5) Modified seaweed: 2kg, modified seaweed ES7718
6) Modified seaweed: 6kg, modified seaweed ES7738
7) Hpmc: 0.6kg, medium and low viscosity cellulose ether
8) pp fiber: 0.5kg, length 3-5mm
3. Insulation production formula series: interface agent
1) Cement: 450kg, 42.5 or ordinary Portland cement
2) Fly ash: 100kg, secondary or undisturbed ash
3) Sand 70-140 mesh: 446kg, graded dry sand
4) Modified seaweed: 2kg, modified seaweed ES7728
5) Hpmc: 2kg, medium and high viscosity cellulose
4. Insulation production formula series: binder (EPS/XPS system)
1) Cement: 400kg, 42.5 ordinary Portland cement
2) Sand 70-140 mesh: 584kg, graded dry sand
3) Modified seaweed: 14kg, modified seaweed ES7738
4) Hpmc: 2kg, medium and low viscosity cellulose ether
5. Insulation production formula series: plastering mortar (EPS/XPS system)
1) Cement: 300kg, 42.5 ordinary Portland cement
2) Fly ash: 30kg, secondary ash or heavy calcium
3) Sand 70-140 mesh: 584kg, graded dry sand
4) Modified seaweed: 18kg, modified seaweed ES7738
5) Hpmc: 1.5kg, medium and low viscosity cellulose ether
6. Reference formula for production of perlite insulation mortar
① PO42.5 ordinary silicon cement: 150KG
② Fly ash: 50KG
③ heavy calcium: 50KG
④ JMH-07 special rubber powder for perlite thermal insulation mortar: 2-3KG
⑤ Wood fiber: 1-1.5KG
⑥ Polypropylene staple fiber or glass fiber: 1KG
⑦ Perlite: 1m³
Add water directly and stir evenly. Mixture: water = 1:1 (G/G). It is best to leave it for 5-10 minutes before use. Construction below 5°C is prohibited. It is best to use up the mixing material within 30 minutes. Add perlite at the construction site, it is recommended to add 0.15 m³ perlite per 25KG slurry.
Non-shrinkage grout basic formula 1 (can be fine-tuned according to the actual situation)
Raw material, model, mass percentage (%)
Portland cement type II, 42.5R, 44
U-shaped expander, 3
Aluminum powder surface treatment, 0.002～0.004
Quicklime CaO, 2
Redispersible latex powder, 2.00
Sand, 1~3mm, 10
Sand, 0.1～1mm, 17.80
Sand, 0.1～0.5mm, 20
Cellulose ether, 6000cps, 0.03
Defoamer, Agtan P80, 10.20
Polycarboxylate superplasticizer, 0.03
Silica powder, Elken 902U, 0.50
Modified Bentonite, Optibent MF, 0.12
Post time: Feb-09-2023