Avanceret teknologi

LANDU Shotcrete Additives — Boosting Strength, Adhesion & Durability

High-Performance Solutions for Modern Sprayed Concrete

Technology Insight

Shotcrete—also known as sprayed concrete—demands exceptional pumpability, early strength, adhesion, and rebound control.

LANDU Comprehensive Solutions

LANDU provides a comprehensive portfolio of high-performance shotcrete additives that enhance placement efficiency, minimize material loss, and ensure consistent results in tunneling, mining, slope stabilization, underground structures, and structural repair projects.

Versatile Application

Whether for dry-mix or wet-mix shotcrete, LANDU additives maintain optimum workability and durability even under complex site and environmental conditions.

Enhanced Styrke

Overlegen Adhesion

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Product Portfolio

LANDU Shotcrete Additives Portfolio

PCE Superplasticizer (PCE Flake)

High Fluidity & Cohesion for Wet‑Mix Shotcrete

A new-generation polycarboxylate superplasticizer in flake form, engineered for maximum flowability, low water-to-cement ratios, and improved cohesiveness.

Nøglefordele:

✓ Optimized pumpability with reduced nozzle blockage

✓ 20–30% water reduction for greater compressive strength

✓ Reliable performance under tunnel and underground conditions

✓ Excellent compatibility with accelerators and reinforcing fibers

Recommended Applications:

Wet‑mix shotcrete, tunnel linings, slope stabilization, deep‑mine operations.

PCE Flake Høj ydeevne

Defoamer Stable Density

Pulver Defoamere

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Stålfiber

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PP Fiber cURL Too many subrequests.

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Micro‑Crack Control & Durability Enhancement

Lightweight, corrosion‑proof polypropylene fibers designed to prevent plastic shrinkage cracks and improve cohesion and surface integrity.

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✓ Fewer microcracks and improved homogeneity

✓ Better spray adhesion and compaction

✓ Non‑corrosive and chemically stable

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Dry‑mix shotcrete, slope protection, decorative or lightweight structures.

Crystalline Waterproofing Additive

Permanent Integral Waterproof Protection

A reactive crystalline component that develops an internal self‑sealing network within the concrete capillaries, providing long‑term waterproofing from within.

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✓ Automatically seals microcracks and pores

✓ Resists hydrostatic water pressure

✓ Protects against chemical or sulfate attack

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Tunnels, underground garages, mines, water reservoirs, and basements.

CCCW Fugtsikring

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Why Choose LANDU Shotcrete Additives

Engineered for High‑Performance Projects

Field‑validated in both dry‑mix and wet‑mix systems across varying geological and climatic conditions.

Factory R&D + On‑Site Expertise

LANDU's research team collaborates with contractors worldwide to optimize set time, pumpability, and anti‑rebound efficiency.

Integrated Production & Stable Supply

In‑house manufacturing of PCE, fibers, defoamers and crystalline powders ensures consistent quality and faster delivery.

OEM / Private Label Support

Available in 25 kg bags, jumbo bulk packs, or custom‑branded packages to match your business needs.

Tilføjelse	Suggested Dosage	Notes
PCE Superplasticizer (Flake)	0.2 – 0.8 % of cement	Adjust for flowability or set time
Pulver Defoamere	0,05 – 0,2 %	Prevents void formation and surface bubbles
Stålfiber	20 – 40 kg/m³	Hooked‑end design recommended
PP Fiber	0.6 – 1.2 kg/m³	Controls plastic shrinkage and cracking
Crystalline Waterproof Additive	0.8 – 2.0 %	Depends on required waterproof grade

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2. Can LANDU PCE Superplasticizer be used with accelerators in wet‑mix shotcrete?

Yes. LANDU PCE Flake Superplasticizer is chemically compatible with most alkali‑free and alkali‑based accelerators. It maintains workability without retarding early strength, making it suitable for tunnel linings or fast‑setting shotcrete applications. We recommend field testing to fine‑tune the dosage for each accelerator type.

3. How do LANDU additives help reduce rebound loss?

Rebound occurs when sprayed material bounces off the surface before adhesion. LANDU polymers and fibers improve cohesion, particle binding, and adhesion, effectively lowering rebound by 10–25%. The result: less material waste, tighter compaction, and a denser finished layer.

4. Which additives are recommended for enhancing early strength development?

A combination of LANDU PCE Superplasticizer (for better dispersion and hydration) plus a proper accelerator system yields rapid strength gain. For ultra‑fast performance (early load‑bearing or overhead applications), our experts can advise optimized formulations including defoamer and fiber adjustments.

5. Will LANDU additives affect the setting time of shotcrete?

Slightly – depending on dosage and temperature. PCE Superplasticizer may extend open time by a few minutes under cold conditions, while accelerators dominate the initial set rate in warm climates. Our R&D team can help adjust dosage ratios for desired set behavior without compromising strength.

6. Can steel fiber and polypropylene fiber be used together in shotcrete?

Absolutely. A hybrid reinforcement of steel + PP fiber combines macro‑level toughness (from steel) with micro‑crack control and better cohesion (from PP fiber). This is a common specification for tunnel shotcrete and slope stabilization, where both impact resistance and surface durability are critical.

7. What kind of waterproofing can the Crystalline Additive achieve?

LANDU Crystalline Waterproofing Additive creates internal crystals that seal capillaries and micro‑cracks within the cement matrix. It provides permanent integral waterproofing, resisting hydrostatic pressure up to 7 bar. The sealing mechanism reactivates upon subsequent moisture exposure.

8. How should LANDU Powder Defoamer be used in shotcrete mixing?

Add the Powder Defoamer directly to the dry blend before water addition to ensure uniform dispersion. Typical dosage is 0.05–0.2% by cement weight. It is especially useful with high‑speed spray equipment where entrained air causes foam and voids.

9. How can LANDU assist with mix design or field optimization?

Our technical support team and laboratory experts provide:

Mix design optimization for site materials
Setting time and pumpability tests
Dosage adjustment based on climate and spray equipment
On‑site support for trial batches and quality evaluation

Each customer receives a complete technical report and recommendation for production scale‑up.

10. Are free samples and OEM options available for distributors?

Yes. LANDU offers free evaluation samples of PCE, fibers, defoamers, and crystalline additives worldwide. OEM and private‑label solutions are available with custom packaging and dosage tailoring to regional cement chemistry. Contact our sales team to discuss bulk supply or partnership options.

Need Expert Guidance for Your Project?

Get in touch with our engineers for mix design consultation or field testing support.

Request Your Free Shotcrete Additive Sample Now →

⚗️ Product Portfolio