پنج افزودنی سیمان برای بهبود مقاومت سیمان و افزایش PSI

In construction, cement-based materials performance are crucial for project quality and long-term durability. For چسب های کاشی, repair mortars, or self-leveling compounds, clients’ primary concerns are:

• Is the strength sufficient?
• Is it prone to cracking?
• Is the application efficient? And is the durability reliable?

Celotech’s five tailored additive combinations are designed specifically to eliminate these concerns. We’ll skip overly complex theories and focus on real-world engineering challenges. With industry-formulation expertise, we can deliver practical, adjustable solutions to balance utility and engineering rigor, helping you solve common construction issues.

I. Why Choose These 5 Additives?

Manufacturers and construction teams frequently encounter recurring issues, including insufficient cement strength, slow early strength development leading to project delays, cracking and hollowing defects, poor workability, and repeated formula debugging. Celotech’s five cement additives: superplasticizer(SP), پودر پلیمری قابل پخش مجدد (RDP), calcium formate(CF), polypropylene (PP) fiber، و اتر سلولز, are precisely formulated to resolve these bottlenecks.

Based on application-specific reference formulas for mainstream dry-mix systems, the following table provides a reliable starting point and can be adjusted according to raw materials and environmental conditions.

Notes: CE is short for Cellulose Ether above. The listed formulas are for reference and preliminary trials only. Performance may vary with cement grade, water-cement ratio, sand gradation, and construction conditions. Laboratory trials and dosage adjustment are recommended before mass production.

II. Practical Engineering Value of 5 Celotech Additives

1. Superplasticizer

Many manufacturers overly rely on increased cement dosage to boost mortar strength. But it raises production costs and increases material brittleness and cracking risks. It is the uneven cement particle dispersion and excessive water-cement ratio that cause porous hardened structures and limit strength potential.

سلوتک فوق روان کننده اولتراپلاست® is developed to ensure efficient particle dispersion and a lower water-cement ratio, improving microstructure density and reducing voids. It supports full cement hydration, improves strength with flexibility maintained.

Key Application Guidelines

• Performance improvement: Optimizes particle dispersion, cuts internal porosity, and improves compressive strength depending on formulation.
• Typical dosage range: 0.2–1.0 kg/ton, with the optimal range of 0.4–0.8 kg/ton. Excessive addition may cause segregation and water bleeding.
• Ideal applications: High-strength repair mortar, self-leveling compounds and high-performance dry-mix mortar requiring balanced strength and fluidity.

2. Redispersible Polymer Powder (RDP)

Tile hollowing, wall insulation, mortar cracking, and weak bonding of repair materials are mainly caused by insufficient interface adhesion and poor flexibility. Rigid cementitious systems cannot accommodate slight substrate deformation.

سلوتک RDP ویناباند® can form a continuous and flexible polymer film inside cement-based materials. The additive enhances interface bonding and improves overall flexibility. It also resists structural peeling and weathering damage effectively while maintaining stable integral performance.

Key Application Guidelines

• Core mechanism: Forms durable polymer films, strengthens adhesion, improves flexibility and strengthens long-term weather resistance.
• Recommended range: 8–50 kg/ton (depending on grade)
• Ideal applications: Tile adhesive, exterior wall insulation mortar, flexible repair mortar and interface bonding agents.

۳. فرمات کلسیم

Low temperature slows cement hydration, delaying early strength gain and demolding, and affecting winter construction efficiency.

As an early strength accelerator, Celotech فرمت کلسیم کوئیک‌ست® promotes cement hydration and rapid C-S-H gel formation. It accelerates early strength development while maintaining later-age strength performance, making it ideal for cold-weather construction.

Key Application Guidelines

• Core mechanism: Accelerates cement hydration, boosts early strength and maintains consistent later-stage strength growth.
• Suggested range: 2.0–8.0 kg/ton, with 4–6 kg/ton as the standard low-temperature dosage.
• Ideal applications: Cold-weather construction, rapid demolding projects and municipal emergency repair materials.

4. Polypropylene (PP) Fiber

Cement-based materials inevitably produce microcracks during drying and shrinkage. These tiny defects act as penetration channels for moisture and corrosive substances, shortening structural service life.

سلوتک فیبر PP سلوفایبر® can build a randomly distributed fiber network inside mortar, which disperses shrinkage stress and restricts crack propagation at the micro level. It greatly enhances material crack resistance and structural integrity.

Key Application Guidelines

• Core mechanism: Forms a reinforcing mesh, disperses shrinkage stress and inhibits dry shrinkage cracking.
• Typical addition range: 1.0–3.0 kg/ton. And 0.6–1.5 kg/ton for most mortars, 1.5–3 kg/ton for repair mortar heavy duty.
• Ideal applications: Exterior wall mortar, floor materials, ملات ضد آب and high-strength repair systems.

5. Cellulose Ether

Rapid water loss on construction sites often leads to premature mortar drying, insufficient cement hydration, and shortened operating time. And finally seriously affects construction workability and final bonding performance.

Celotech cellulose ethers, such as HPMC, HEC, MHEC, CMC are high-efficiency water retention agents. They ensure complete cement hydration, extend open time, and significantly improve overall construction workability for workers.

Key Application Guidelines

• Core mechanism: Enhances water retention, extends operable time and optimizes mortar workability.
• Recommended dosage range: 0.2–2.5 kg/ton, with 0.8–1.5 kg/ton suitable for most dry-mix products, depending on viscosity grade.
• Ideal applications: All types of ملات خشک, گچ بری mortar, tile adhesive and self-leveling compounds.

III. Core Logic of Combined Additive Use

A single additive can only solve individual construction defects, while the scientific combination of Celotech’s five core additives achieves complementary functions. Each material plays a targeted role in dispersion, bonding, water retention, crack resistance, and early strength promotion. The combination of these chemical additives can form a comprehensive performance optimization system for diversified construction scenarios.

Three Reference Formulas for Common Projects

1. High-Strength Repair System

Combination: Superplasticizer + RDP + PP Fiber + Cellulose Ether. This formula balances compactness, flexibility and crack resistance, perfectly meeting the rapid repair demands of heavy-load structural components.

2. High-Bond Tile Adhesive System

Combination: RDP + Cellulose Ether + Superplasticizer. It focuses on interface bonding improvement and construction operability to minimize tile hollowing and falling-off issues.

3. Low-Temperature Construction System

Combination: Calcium Formate + Superplasticizer + Cellulose Ether. It ensures stable hydration and timely strength growth in low-temperature environments to guarantee winter construction schedules.

Key Advantages of Synergistic Formulation

1. Clear functional division with coordinated performance to cover multiple engineering demands.
2. Strong scenario adaptability to meet the customized needs of different dry-mix mortar products.
3. Rational cost control that reduces cement consumption and later maintenance costs.
4. High feasibility with industry-verified formulas that shorten independent formula development cycles.

IV. On-Site Operation Guidelines

1. Formula Adjustment Principle: All reference ratios are for baseline reference only. You need to conduct laboratory pre-testing before mass production when raw materials and the environment change.
2. Correct Feeding Sequence: Mix bulk raw materials evenly first, add powder additives, and finally incorporate superplasticizer and mixing water for sufficient stirring.
3. Strict Dosage Control: Overdosage of any additive will lead to abnormal viscosity, bleeding, or strength reduction.
4. Standardized Construction & Curing: Avoid long-term exposure under high temperatures and strong winds. Please follow standardized curing processes to maximize additive efficiency.

نتیجه گیری

Construction manufacturers and mortar producers require practical, field-tested solutions rather than overly academic theories. As specialized cement-based material additives, Celotech superplasticizer, RDP, calcium formate, PP fiber و اترهای سلولزی deliver targeted, adjustable and cost-effective combination solutions for tile adhesive, repair mortar, self-leveling compounds and low-temperature construction projects.

With verified formulation data, clear application scenarios and professional technical guidance, this guide helps global clients optimize dry-mix mortar formulas, improve finished product quality and resolve common on-site construction pain points. Contact Celotech for high-performance construction chemical solutions now!

سوالات متداول

1. Can I use these reference formulas directly in production?

نه دقیقا. These formulas are for your reference and laboratory tests only. You need to check the test result and adjust based on local raw materials and conditions.

2. Can I adjust cement content without affecting performance?

Minor adjustments are possible, but we do not suggest that since changes in cement content will affect strength, workability, and setting behavior. We recommend re-testing after adjustment.

3. Can these additives be used with PVA or نشاسته سیستم های؟

Yes, but compatibility depends on dosage and system design, so you’d better conduct some tests first.

4. How much does your RDP improve bonding strength in real tests?

Celotech RDP can significantly improve bonding strength depending on formulation design, typically enhancing adhesion and reducing failure at the interface in cement-based systems.

5. Will PP fiber affect surface smoothness in self-leveling systems?

PP fiber has minimal impact on surface smoothness under reasonable use. Avoid overdosing and poor dispersion, otherwise it may affect leveling performance.

6. Does calcium formate impact final strength negatively?

No. Calcium formate mainly improves early strength development and has minimal impact on long-term strength when properly dosed.