Kehittynyt teknologia

LANDU Shotcrete Additives — Boosting Strength, Adhesion & Durability

High-Performance Solutions for Modern Sprayed Concrete

Teknologianäkymä

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.

Parannettu Lujuus

Superior Adhesion

Long-Term Kestävyys

Technical Challenges

Why Shotcrete Requires Specialized Additives

Shotcrete faces far more demanding conditions than conventional cast concrete:

● High pump pressure and long-distance conveying

● Material rebound and overspray losses

● Immediate adhesion and fast strength gain

● Segregation risk and nozzle clogging

● Harsh underground environments (humidity, vibration, dust)

LANDU Shotcrete Additives are formulated to deliver:

Rapid setting and higher early strength

Up to 25% rebound reduction, saving material and labor costs

Excellent adhesion and cohesive matrix formation

Stable pumpability and uniform flow

Enhanced durability and long-term strength development

Tuotevalikoima

LANDU Shotcrete Additives Portfolio

PCE-superplastifikaattori (PCE-helmi)

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.

Keskeiset hyödyt:

✓ 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

Suositellut sovellukset:

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

PCE-flake Korkea suorituskyky

Vaahdonestote Stable Density

Jauhevaahtoestovaahdottaja

Anti‑Foam Solution for Stable Density & Strength

LANDU Powder Defoamer removes entrapped air bubbles formed during high‑pressure spraying, ensuring a dense, uniform shotcrete surface.

Benefits:

✓ Minimizes excess foam and voids during spraying

✓ Delivers smoother finishes and enhanced mechanical strength

✓ Improves compaction of dry‑ and wet‑mix formulations

Applications:

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Teräskuitu

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Benefits:

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Teräskuitu Vahvistus

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Benefits:

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Applications:

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Kristallinen vesieristyslisäaine

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Benefits:

✓ Automatically seals microcracks and pores

✓ Resists hydrostatic water pressure

✓ Protects against chemical or sulfate attack

Applications:

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

CCCW Vesieristys

Miksi valita meidät

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.

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Technical Guidelines

Typical Dosage Guidelines

Additive	Suggested Dosage	Notes
PCE Superplasticizer (Flake)	0.2 – 0.8 % of cement	Adjust for flowability or set time
Jauhevaahtoestovaahdottaja	0.05 – 0.2 %	Prevents void formation and surface bubbles
Teräskuitu	20 – 40 kg/m³	Hooked‑end design recommended
cURL Too many subrequests.	0.6 – 1.2 kg/m³	Controls plastic shrinkage and cracking
Crystalline Waterproof Additive	0.8 – 2.0 %	Depends on required waterproof grade

(Dosages can be fine‑tuned according to project conditions and performance targets.)

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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 →

❓ Technical Challenges

Why Shotcrete Requires Specialized Additives

⚠️

Shotcrete faces far more demanding conditions than conventional cast concrete:

● High pump pressure and long-distance conveying

● Material rebound and overspray losses

● Immediate adhesion and fast strength gain

● Segregation risk and nozzle clogging

● Harsh underground environments (humidity, vibration, dust)

✨

LANDU Shotcrete Additives are formulated to deliver:

✔

Rapid setting and higher early strength

✔

Up to 25% rebound reduction, saving material and labor costs

✔

Excellent adhesion and cohesive matrix formation

✔

Stable pumpability and uniform flow

✔

Enhanced durability and long-term strength development

⚗️ Tuotevalikoima